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#!/bin/bash -e
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set -o errexit -o pipefail # errexit in case caller's #! line missing -e
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if test ! "$_util_sh_include_guard_utils"; then
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_util_sh_include_guard_utils=1
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isset() { declare -p "$1" &>/dev/null; }
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realpath() { readlink -f -- "$1"; }
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str2varname() { echo "${1//[^a-zA-Z0-9_]/_}"; }
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include_guard_var() { str2varname "$(realpath "$1")"; }
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self_not_included() # usage: if self_not_included; then ... fi
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{
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test $# -ge 1 || set -- "${BASH_SOURCE[1]}"
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local include_guard="$(include_guard_var "$1")"
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alias self_being_included=false
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! isset "$include_guard" && \
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{ eval "$include_guard"=1; alias self_being_included=true; }
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}
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# to load newly-defined aliases for use in functions in the same file:
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## fi # load new aliases
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## if self_being_included; then
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# this is needed because aliases defined inside an if statement are not
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# available inside that if statement
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fi
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if self_not_included "${BASH_SOURCE[0]}"; then
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#### options
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shopt -s expand_aliases
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# allow setting vars in the last command of a pipeline
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shopt -s lastpipe 2>/dev/null || true # ignore errors if not supported (on Mac)
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#### stubs
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__caller_indent='log_indent="$log_indent$log_indent_step"'
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alias caller_indent="$__caller_indent"
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alias indent="declare $__caller_indent"
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function echo_func() { :; }
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alias echo_func='"echo_func" "$FUNCNAME" "$@" && indent || true'
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function echo_run() { :; }
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alias echo_run='"echo_run" ' # last space alias-expands next word
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# auto-echo common external commands
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for cmd in env rm which; do alias "$cmd=echo_run $cmd"; done; unset cmd
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echo_builtin() { :; }
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function echo_vars() { :; }
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#### debugging
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dp() { echo "$@" >&2; } # usage: pv var... # debug-prints message
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#### logic
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not() { ! "$@"; } # usage: wrapper_cmd not wrapped_cmd... # inverts exit status
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#### vars
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alias local_array='declare'
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# `local` does not support arrays in older versions of bash
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# don't need -a because that it's an array is autodetected by the ()
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set_var() { eval "$1"'="$2"'; }
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set_default() { if ! isset "$1"; then set_var "$@"; fi; }
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set_inv() { set_var no_"$1" "$(test "${!1}" || echo 1)"; }
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# usage: local var=...; local_inv
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alias local_inv=\
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'declare "no_$var=$(test "${!var}" || echo 1)"; echo_vars no_$var'
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unexport() { export -n "$@"; }
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# `declare +x` won't work because it defines the var if it isn't set
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alias local_export='declare -x' # combines effects of local and export
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alias export_array='declare -x'
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# `export` does not support arrays in older versions of bash
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# don't need -a because that it's an array is autodetected by the ()
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# to make export only visible locally: local var="$var"; export var
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# within cmd: var="$var" cmd...
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get_prefix_vars() { : "${prefix:?}"; eval echo '${!'$prefix'*}'; }
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# usage: local prefix=..._; import_vars
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# when used inside another alias 2+ levels deep, *must* be run inside a function
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alias import_vars="$(cat <<'EOF'
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: "${prefix:?}"
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declare src_var dest_var
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for src_var in $(get_prefix_vars); do
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dest_var="${src_var#$prefix}"
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declare "$dest_var=${!dest_var-${!src_var}}"; echo_vars "$dest_var"
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done
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EOF
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)"
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#### caching
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## shell-variable-based caching
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# usage: local cache_key=...; load_cache; \
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# if ! cached; then save_cache value || return; fi; echo_cached_value
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# cache_key for function inputs: "$(declare -p kw_param...) $*"
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alias load_cache='declare cache_var="$(str2varname "${FUNCNAME}___$cache_key")"'
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alias cached='isset "$cache_var"'
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alias save_cache='set_var "$cache_var"'
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alias echo_cached_value='echo "${!cache_var}"'
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clear_cache() # usage: func=... clear_cache
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{ : "${func:?}"; unset $(prefix="${func}___" get_prefix_vars); }
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fi # load new aliases
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if self_being_included; then
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#### aliases
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unalias() { builtin unalias "$@" 2>&- || true; } # no error if undefined
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# usage: alias alias_='var=value run_cmd '
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function run_cmd() { "$@"; }
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alias run_cmd='"run_cmd" ' # last space alias-expands next word
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alias_append() { eval "$(alias "$1")"'"$2"';} #usage: alias_append alias '; cmd'
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#### commands
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is_callable() { type -t "$@" >/dev/null; }
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is_dot_script() { echo_func; test "${BASH_LINENO[${#BASH_LINENO[@]}-1]}" != 0; }
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require_dot_script() # usage: require_dot_script || return
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{
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echo_func
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if ! is_dot_script; then # was run without initial "."
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echo "usage: . $top_script (note initial \".\")"|fold -s >&2
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return 2
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fi
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}
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sys_cmd_path() { echo_func; echo_builtin command -p which "$1"|echo_stdout; }
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# makes command in $1 a system command
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# allows running a system command of the same name as the script
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alias cmd2sys="$(cat <<'EOF'
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declare _1="$1"; shift
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_1="$(indent; log++ sys_cmd_path "$_1")" || return
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set -- "$_1" "$@"
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EOF
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)"
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fi # load new aliases
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if self_being_included; then
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sys_cmd() { cmd2sys; command "$@"; } # usage: sys_cmd cmd... # runs system cmd
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# allows running a system command of the same name as the script
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#### functions
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kw_params() # usage: func() { kw_params param_var...; }; ...; param_var=... cmd
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# removes keyword-param-only vars from the environment
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{ unexport "$@"; }
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# usage: cmd=... foreach_arg
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function foreach_arg()
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{
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echo_func; kw_params cmd; : "${cmd:?}"
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local a; for a in "$@"; do
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a="$(log++ echo_run "$cmd" "$a")" || return; args+=("$a")
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done
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echo_vars args
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}
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alias foreach_arg='"foreach_arg" "$@"; set -- "${args[@]}"; unset args'
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alias self_name='echo "${FUNCNAME%%__*}"' # usage: "$(self_name)"
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alias self='command "$(self_name)"' # usage: wrapper() { self ...; }
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alias self_sys='sys_cmd "$(self_name)"' # wrapper() { self_sys ...; }
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pv() { declare -p "$@" >&2; } # usage: pv var... # debug-prints var(s)
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pf() { declare -f "$@" >&2; } # usage: pf function # debug-prints func decl
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all_funcs() # usage: for func in $(all_funcs); do ...; done # all declared funcs
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{ declare -F|while read -r line; do echo -n "${line#declare -f } "; done; }
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#### exceptions
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# usage: cmd || { save_e; ...; rethrow; }
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alias export_e='e=$?'
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# **WARNING**: if using this after a command that might succeed (rather than
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# only upon error), you must `unset e` before the command
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# idempotent: also works if save_e already called
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alias save_e='# idempotent: use $e if the caller already called save_e
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declare e_=$?;
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declare e="$(if test "$e_" = 0; then echo "${e:-0}"; else echo "$e_"; fi)"'
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alias rethrow!='return "$e"'
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# can't use `(exit "$e")` because a bug in bash prevents subshells from
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# triggering errexit (would need to append `|| return` for it to work)
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alias rethrow_exit!='exit "$e"'
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alias rethrow='{ if test "$e" != 0; then rethrow!; fi; }'
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alias rethrow_exit='{ if test "$e" != 0; then rethrow_exit!; fi; }'
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alias rethrow_subshell='rethrow_exit'
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fi # load new aliases
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if self_being_included; then
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# usage: try cmd...; ignore_e status; if catch status; then ...; fi; end_try
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alias prep_try='declare e=0' # last space alias-expands next word
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# usage: ...; try cmd... # *MUST* be at beginning of statement
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# OR prep_try; wrapper "try" cmd...
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function try() { benign_error=1 "$@" || { export_e; true; }; }
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241
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alias try='prep_try; "try" ' # last space alias-expands next word
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catch() { test "$e" = "${1:-0}" && e=0; } # also works w/ $1=''
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244
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245
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ignore_e() { catch "$@" || true; } # also works w/ $1=''
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246
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247
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alias end_try='rethrow'
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248
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alias end_try_subshell='rethrow_subshell'
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249
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|
250
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ignore() { save_e; ignore_e "$@"; rethrow; } # usage: try cmd || ignore status
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251
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|
252
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### signals
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253
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254
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sig_e() { echo $(( 128+$(kill -l "$1") )); } # usage: sig_e SIGINT, etc.
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255
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|
256
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ignore_sig() { ignore "$(sig_e "$1")"; }
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257
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|
258
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# usage: piped_cmd cmd1...|cmd2... # cmd2 doesn't read all its input
|
259
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function piped_cmd() { "$@" || ignore_sig SIGPIPE; }
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260
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alias piped_cmd='"piped_cmd" ' # last space alias-expands next word
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261
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262
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fi # load new aliases
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263
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if self_being_included; then
|
264
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|
265
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|
266
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#### integers
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267
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|
268
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let!() { let "$@" || true; } # always returns true; safe to use for setting
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269
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# "If the last ARG evaluates to 0, let returns 1" (`help let`)
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270
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271
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bool2int() { try test ! "$1"; echo "$e"; } # empty->0; non-empty->1
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272
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273
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int2exit() { (( "$1" != 0 )); }
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274
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275
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exit2bool() { if (( $? == 0 )); then echo 1; fi } # 0->non-empty; !=0->empty
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276
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|
277
|
|
278
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#### floats
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279
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|
280
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int_part() { echo "${1%%.*}"; }
|
281
|
|
282
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dec_suffix() { echo "${1#$(int_part "$1")}"; }
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283
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|
284
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round_down() { int_part "$1"; }
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285
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|
286
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float+int() { echo "$(($(int_part "$1")+$2))$(dec_suffix "$1")"; }
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287
|
|
288
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float_set_min() { if (($(int_part $1) >= $2)); then echo $1; else echo $2; fi; }
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289
|
|
290
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|
291
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#### strings
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292
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|
293
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starts_with() { test "${2#$1}" != "$2"; } # usage: starts_with pattern str
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294
|
|
295
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match_prefix() # usage: match_prefix pattern str
|
296
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{ if starts_with "$1" "$2"; then echo "${2%${2#$1}}"; fi }
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297
|
|
298
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rm_prefix() { echo "${2#$1}"; } # usage: rm_prefix pattern str
|
299
|
|
300
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repeat() # usage: str=... n=... repeat
|
301
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{
|
302
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: "${str?}" "${n:?}"; local result= n="$n" # n will be modified in function
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303
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for (( ; n > 0; n-- )); do result="$result$str"; done
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304
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echo "$result"
|
305
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}
|
306
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|
307
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# usage: outer_cmd $sed_cmd ...
|
308
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sed_cmd="env LANG= sed -`case "$(uname)" in Darwin) echo El;; *) echo ru;;esac`"
|
309
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# LANG: avoid invalid UTF-8 "illegal byte sequence" errors when LANG=*.UTF-8
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310
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# -l: line buffered / -u: unbuffered
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311
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alias sed="$sed_cmd"
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312
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# can't be function because this causes segfault in redir() subshell when
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313
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# used with make.sh make() filter
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314
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315
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fi # load new aliases
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316
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if self_being_included; then
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317
|
|
318
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rtrim() { log_local; log+ 3; sed 's/[[:space:]]+$//' <<<"$1"; }
|
319
|
|
320
|
|
321
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#### arrays
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322
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|
323
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echo1() { echo "$1"; } # usage: echo1 values...
|
324
|
|
325
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esc_args() # usage: array=($(log++; prep_env... (eg. cd); esc_args args...))
|
326
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{ local arg; for arg in "$@"; do printf '%q ' "$arg"; done; }
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327
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|
328
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# usage: split delim str; use ${parts[@]}
|
329
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function split() { local IFS="$1"; parts=($2); echo_vars parts; }
|
330
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# no echo_func because used by log++
|
331
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alias split='declare parts; "split"'
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332
|
|
333
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join() { local IFS="$delim"; echo "$*"; } # usage: delim=char join elems...
|
334
|
|
335
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reverse() # usage: array=($(reverse args...))
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336
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{
|
337
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local i
|
338
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for (( i=$#; i > 0; i-- )); do printf '%q ' "${!i}"; done
|
339
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}
|
340
|
|
341
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contains() # usage: contains value in_array...
|
342
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{
|
343
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local value="$1"; shift
|
344
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local elem
|
345
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for elem in "$@"; do if test "$elem" = "$value"; then return 0; fi; done
|
346
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return 1
|
347
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}
|
348
|
|
349
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is_array() # handles unset vars (=false)
|
350
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{
|
351
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isset "$1" || return 1
|
352
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local decl; decl="$(declare -p "$1")" || return; echo_vars decl
|
353
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starts_with 'declare -a' "$decl" # also matches -ax
|
354
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}
|
355
|
|
356
|
|
357
|
#### text
|
358
|
|
359
|
fi # load new aliases
|
360
|
if self_being_included; then
|
361
|
|
362
|
nl='
|
363
|
'
|
364
|
|
365
|
# usage: split_lines str; use ${lines[@]}
|
366
|
function split_lines() { split "$nl" "$1"; lines=("${parts[@]}"); }
|
367
|
# no echo_func because used by log++
|
368
|
alias split_lines='declare lines; "split_lines"'
|
369
|
|
370
|
|
371
|
#### paths
|
372
|
|
373
|
strip/() { echo "${1%/}"; } # strips trailing /s
|
374
|
|
375
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wildcard/() # usage: array=($(log++; [cd ...;] wildcard/ unquoted_pattern...))
|
376
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{ cmd=strip/ foreach_arg; esc_args "$@"; }
|
377
|
|
378
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wildcard.() # usage: array=($(log++; [cd ...;] wildcard. unquoted_pattern...))
|
379
|
# currently only removes . .. at beginning of list
|
380
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{
|
381
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set -- $(wildcard/ "$@") # first strip trailing /s
|
382
|
local to_rm=(. ..)
|
383
|
local item
|
384
|
if contains "$1" "${to_rm[@]}"; then
|
385
|
shift
|
386
|
if contains "$1" "${to_rm[@]}"; then shift; fi
|
387
|
fi
|
388
|
esc_args "$@"
|
389
|
}
|
390
|
|
391
|
#### streams
|
392
|
|
393
|
pipe_delay() # usage: cmd1 | { pipe_delay; cmd2; }
|
394
|
{ sleep 0.1; } # s; display after leading output of cmd1
|
395
|
|
396
|
|
397
|
#### verbose output
|
398
|
|
399
|
|
400
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err_fd=2 # stderr
|
401
|
|
402
|
usage() { echo "Usage: $1" >&2; return 2; }
|
403
|
|
404
|
|
405
|
### log++
|
406
|
|
407
|
log_fd=2 # initially stderr
|
408
|
|
409
|
if test "$explicit_errors_only"; then verbosity=0; fi # hide startup logging
|
410
|
|
411
|
# set verbosity
|
412
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if isset verbose; then : "${verbosity:=$(bool2int "$verbose")}"; fi
|
413
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if isset vb; then : "${verbosity:=$vb}"; fi
|
414
|
: "${verbosity=1}" # default
|
415
|
: "${verbosity:=0}" # ensure non-empty
|
416
|
export verbosity # propagate to invoked commands
|
417
|
|
418
|
is_outermost="$(! isset log_level; exit2bool)" # if util.sh env not yet set up
|
419
|
|
420
|
# set log_level
|
421
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: "${log_level=$(( ${#PS4}-1 ))}" # defaults to # non-space symbols in PS4
|
422
|
export log_level # propagate to invoked commands
|
423
|
export PS4 # follows log_level, so also propagate this
|
424
|
|
425
|
verbosity_int() { round_down "$verbosity"; }
|
426
|
|
427
|
# verbosities (and `make` equivalents):
|
428
|
# 0: just print errors. useful for cron jobs.
|
429
|
# vs. make: equivalent to --silent, but suppresses external command output
|
430
|
# 1: also external commands run. useful for running at the command line.
|
431
|
# vs. make: not provided (but sorely needed to avoid excessive output)
|
432
|
# 2: full graphical call tree. useful for determining where error occurred.
|
433
|
# vs. make: equivalent to default verbosity, but with much-needed indents
|
434
|
# 3: also values of kw params and variables. useful for low-level debugging.
|
435
|
# vs. make: not provided; need to manually use $(error $(var))
|
436
|
# 4: also variables in util.sh commands. useful for debugging util.sh.
|
437
|
# vs. make: somewhat similar to --print-data-base
|
438
|
# 5: also variables in logging commands themselves. useful for debugging echo_*.
|
439
|
# vs. make: not provided; need to search Makefile for @ at beginning of cmd
|
440
|
# 6+: not currently used (i.e. same as 5)
|
441
|
|
442
|
# definition: the log_level is the minimum verbosity needed to display a message
|
443
|
# for messages that use can_log(), the log_level starts with *1*, not 0
|
444
|
# for unfiltered messages, the log_level is 0 (i.e. still output at verbosity=0)
|
445
|
# to view a message's log_level, count the # of + signs before it in the output
|
446
|
|
447
|
alias log_local='declare PS4="$PS4" log_level="$log_level"'
|
448
|
|
449
|
fi # load new aliases
|
450
|
if self_being_included; then
|
451
|
|
452
|
# usage: in func: log_local; log++; ...
|
453
|
# outside func: log_local; log++; ...; log--
|
454
|
# before cmd: log++ cmd OR log+ num cmd OR log++ log++... cmd
|
455
|
# with a cmd, assignments are applied just to it, so log_local is not needed
|
456
|
# without a cmd, assignments are applied to caller ("$@" expands to nothing)
|
457
|
# "${@:2}" expands to all of $@ after *1st* arg, not 2nd ($@ indexes start at 1)
|
458
|
log:() # sets explicit log_level
|
459
|
{
|
460
|
if test $# -gt 1; then log_local; fi # if cmd, only apply assignments to it
|
461
|
# no local vars because w/o cmd, assignments should be applied to caller
|
462
|
log_level="$1"
|
463
|
PS4="$(str="${PS4:0:1}" n=$((log_level-1)) repeat)${PS4: -2}"
|
464
|
"${@:2}"
|
465
|
}
|
466
|
log+() { log: $((log_level+$1)) "${@:2}"; }
|
467
|
log-() { log+ "-$1" "${@:2}"; }
|
468
|
# no log:/+/- alias needed because next word is not an alias-expandable cmd
|
469
|
function log++() { log+ 1 "$@"; }
|
470
|
function log--() { log- 1 "$@"; }
|
471
|
function log!() { log: 0 "$@"; } # force-displays next log message
|
472
|
alias log++='"log++" ' # last space alias-expands next word
|
473
|
alias log--='"log--" ' # last space alias-expands next word
|
474
|
alias log!='"log!" ' # last space alias-expands next word
|
475
|
|
476
|
verbosity_min() # usage: verbosity_min {<min>|''}
|
477
|
# WARNING: '' is a special value that causes $verbosity to be overwritten to ''
|
478
|
{ if test ! "$1" -o "$(verbosity_int)" -lt "$1"; then verbosity="$1"; fi; }
|
479
|
alias verbosity_min='declare verbosity="$verbosity"; "verbosity_min"'
|
480
|
|
481
|
# usage: (verbosity_compat; cmd)
|
482
|
function verbosity_compat()
|
483
|
{ echo_func; if ((verbosity == 1)); then unset verbosity; fi; }
|
484
|
alias verbosity_compat='declare verbosity="$verbosity"; "verbosity_compat"'
|
485
|
|
486
|
|
487
|
# indent for call tree. this is *not* the log_level (below).
|
488
|
: "${log_indent_step=| }" "${log_indent=}"
|
489
|
export log_indent_step log_indent # propagate to invoked commands
|
490
|
|
491
|
# see indent alias in stubs
|
492
|
|
493
|
|
494
|
fi # load new aliases
|
495
|
if self_being_included; then
|
496
|
|
497
|
can_log() { test "$log_level" -le "$(verbosity_int)"; }
|
498
|
# verbosity=0 turns off all logging
|
499
|
|
500
|
can_highlight_msg() { test "$log_level" -le 1; }
|
501
|
|
502
|
has_bg()
|
503
|
{
|
504
|
# inverse (black background)/set background (normal colors)/set background
|
505
|
# (bright colors) (xfree86.org/current/ctlseqs.html#Character_Attributes)
|
506
|
starts_with 7 "$1" || starts_with 4 "$1" || starts_with 10 "$1"
|
507
|
}
|
508
|
|
509
|
highlight_msg() # usage: [format=...] highlight_msg msg
|
510
|
# format: the # in xfree86.org/current/ctlseqs.html#Character_Attributes
|
511
|
{
|
512
|
kw_params format; local format="${format-1}" # bold
|
513
|
if ! can_highlight_msg; then format=; fi
|
514
|
echo "${format:+[0;${format}m}$1${format:+[0m}"
|
515
|
}
|
516
|
|
517
|
log_line!() # highlights log_level 1 messages to stand out against other output
|
518
|
{ echo "$log_indent$PS4$(highlight_msg "$1")" >&"$log_fd"; }
|
519
|
|
520
|
log_msg!()
|
521
|
{ split_lines "$1"; local l; for l in "${lines[@]}"; do log_line! "$l"; done; }
|
522
|
|
523
|
log() { if can_log; then log_msg! "$@"; fi; }
|
524
|
|
525
|
log_custom() # usage: symbol=... log_custom msg
|
526
|
{ log_indent="${log_indent//[^ ]/$symbol}" PS4="${PS4//[^ ]/$symbol}" log "$@";}
|
527
|
|
528
|
bg_r='101;97' # red background with white text
|
529
|
|
530
|
log_err() { symbol='#' format="$bg_r" log_fd="$err_fd" log! log_custom " $1 ";}
|
531
|
|
532
|
log_info() { symbol=: log_custom "$@"; }
|
533
|
|
534
|
mk_hint() { format=7 highlight_msg " $1 "; }
|
535
|
|
536
|
log_hint!() { log_info "$(mk_hint "$@")"; }
|
537
|
|
538
|
log_hint() # usage: cmd || [benign_error=1] log_hint msg [|| handle error]
|
539
|
# msg only displayed if not benign error
|
540
|
{ kw_params benign_error; if test ! "$benign_error"; then log_hint! "$@"; fi; }
|
541
|
|
542
|
die() # usage: cmd || [type=...] die msg # msg can use $? but not $()
|
543
|
{ save_e; kw_params type; "log_${type:-err}" "$1"; rethrow; }
|
544
|
|
545
|
die_e() # usage: cmd || [benign_error=1] die_e [|| handle error]
|
546
|
{
|
547
|
save_e; kw_params benign_error
|
548
|
if test "$benign_error"; then log_local; log++; fi
|
549
|
type="${benign_error:+info}" die "command exited with \
|
550
|
$(if test "$benign_error"; then echo status; else echo error; fi) $e"
|
551
|
rethrow
|
552
|
}
|
553
|
|
554
|
die_error_hidden() # usage: cmd || verbosity_min=# die_error_hidden [|| ...]
|
555
|
{
|
556
|
save_e; kw_params verbosity_min; : "${verbosity_min:?}"
|
557
|
echo_vars verbosity
|
558
|
if test "$(verbosity_int)" -lt "$verbosity_min"; then
|
559
|
log_hint 'to see error details, prepend `vb='"$verbosity_min"'` to the command'
|
560
|
fi
|
561
|
rethrow
|
562
|
}
|
563
|
|
564
|
|
565
|
#### functions
|
566
|
|
567
|
func_exists() { declare -f "$1" >/dev/null; }
|
568
|
|
569
|
copy_func() # usage: from=... to=... copy_func
|
570
|
# $to must not exist. to get around the no-clobber restriction, use `unset -f`.
|
571
|
{
|
572
|
: "${from:?}" "${to:?}"
|
573
|
func_exists "$from" || die "function does not exist: $from"
|
574
|
! func_exists "$to" || die "function already exists: $to"
|
575
|
local from_def="$(declare -f "$from")"
|
576
|
eval "$to${from_def#$from}"
|
577
|
}
|
578
|
|
579
|
func_override() # usage: func_override old_name__suffix
|
580
|
{ from="${1%__*}" to="$1" copy_func; }
|
581
|
|
582
|
ensure_nested_func() # usage: func__nested_func() { ensure_nested_func; ... }
|
583
|
{
|
584
|
local nested_func="${FUNCNAME[1]}"
|
585
|
local func="${nested_func%%__*}"
|
586
|
contains "$func" "${FUNCNAME[@]}" || \
|
587
|
die "$nested_func() must be used by $func()"
|
588
|
}
|
589
|
|
590
|
|
591
|
#### paths
|
592
|
|
593
|
# cache realpath
|
594
|
: "${realpath_cache=}" # default off because slower than without
|
595
|
if test "$realpath_cache"; then
|
596
|
func_override realpath__no_cache
|
597
|
realpath() # caches the last result for efficiency
|
598
|
{
|
599
|
local cache_key="$*"; load_cache
|
600
|
if ! cached; then save_cache "$(realpath__no_cache "$@")" || return; fi
|
601
|
echo_cached_value
|
602
|
}
|
603
|
fi
|
604
|
|
605
|
rel_path() # usage: base_dir=... path=... rel_path
|
606
|
{
|
607
|
kw_params base_dir path
|
608
|
: "${base_dir:?}" "${path:?}"
|
609
|
|
610
|
local path="$path/" # add *extra* / to match path when exactly = base_dir
|
611
|
path="${path#$base_dir/}" # remove prefix shared with base_dir
|
612
|
path="${path%/}" # remove any remaining extra trailing /
|
613
|
|
614
|
if test ! "$path"; then path=.; fi # ensure non-empty
|
615
|
|
616
|
echo_vars path
|
617
|
echo "$path"
|
618
|
}
|
619
|
|
620
|
cd -P . # expand symlinks in $PWD so it matches the output of realpath
|
621
|
# do before setting $top_script_abs so realpath has less symlinks to resolve
|
622
|
|
623
|
canon_rel_path() # usage: [base_dir=...] canon_rel_path path
|
624
|
{
|
625
|
kw_params base_dir; local base_dir="${base_dir-$PWD}"
|
626
|
base_dir="$(realpath "$base_dir")" || return
|
627
|
local path; path="$(realpath "$1")" || return
|
628
|
rel_path
|
629
|
}
|
630
|
|
631
|
canon_dir_rel_path() # usage: [base_dir=...] canon_dir_rel_path path
|
632
|
# if the path is a symlink, just its parent dir will be canonicalized
|
633
|
{
|
634
|
kw_params base_dir; local base_dir="${base_dir-$PWD}"
|
635
|
base_dir="$(realpath "$base_dir")" || return
|
636
|
local path; path="$(realpath "$(dirname "$1")")/$(basename "$1")" || return
|
637
|
rel_path
|
638
|
}
|
639
|
|
640
|
# makes $1 a canon_rel_path if it's a filesystem path
|
641
|
alias cmd2rel_path="$(cat <<'EOF'
|
642
|
if test "$(type -t "$1")" = file && test -e "$1"; then # not relative to PATH
|
643
|
declare _1="$1"; shift
|
644
|
_1="$(log++ canon_rel_path "$_1")" || return
|
645
|
set -- "$_1" "$@"
|
646
|
fi
|
647
|
EOF
|
648
|
)"
|
649
|
|
650
|
# usage: path_parents path; use ${dirs[@]} # includes the path itself
|
651
|
function path_parents()
|
652
|
{
|
653
|
echo_func; local path="$1" prev_path=; dirs=()
|
654
|
while test "$path" != "$prev_path"; do
|
655
|
prev_path="$path"
|
656
|
dirs+=("$path")
|
657
|
path="${path%/*}"
|
658
|
done
|
659
|
}
|
660
|
alias path_parents='declare dirs; "path_parents"'
|
661
|
|
662
|
|
663
|
#### verbose output
|
664
|
|
665
|
|
666
|
### command echoing
|
667
|
|
668
|
alias echo_params='log "$*"'
|
669
|
|
670
|
fi # load new aliases
|
671
|
if self_being_included; then
|
672
|
|
673
|
echo_cmd() { echo_params; }
|
674
|
|
675
|
function echo_run() { echo_params; "$@"; }
|
676
|
# see echo_run alias after stub
|
677
|
|
678
|
echo_builtin() { echo_run builtin "$@"; } # usage: echo_builtin builtin_cmd...
|
679
|
|
680
|
echo_eval() { echo_params; builtin eval "$@"; }
|
681
|
|
682
|
# usage: redirs=(...); [cmd_name_log_inc=#] echo_redirs_cmd
|
683
|
function echo_redirs_cmd()
|
684
|
{
|
685
|
local cmd_name_log_inc="${cmd_name_log_inc-0}"
|
686
|
|
687
|
# print <>file redirs before cmd, because they introduce it
|
688
|
log+ "$cmd_name_log_inc" echo_cmd "$@" $(
|
689
|
set -- "${redirs[@]}" # operate on ${redirs[@]}
|
690
|
while test "$#" -gt 0 && starts_with '[<>][^&]' "$1"
|
691
|
do log "$1 \\"; shift; done # log() will run *before* echo_cmd itself
|
692
|
echo "$@"
|
693
|
)
|
694
|
}
|
695
|
alias echo_redirs_cmd='"echo_redirs_cmd" "$@"'
|
696
|
|
697
|
## vars
|
698
|
|
699
|
echo_vars() # usage: echo_vars var... # only prints vars that are defined
|
700
|
{
|
701
|
log_local; log+ 2
|
702
|
if can_log; then
|
703
|
local var
|
704
|
for var in "${@%%=*}"; do
|
705
|
if isset "$var"; then log "$(declare -p "$var")"; fi
|
706
|
done
|
707
|
fi
|
708
|
}
|
709
|
|
710
|
echo_export() { builtin export "$@"; echo_vars "$@"; }
|
711
|
|
712
|
alias export="echo_export" # automatically echo env vars when they are set
|
713
|
|
714
|
func_override kw_params__lang
|
715
|
kw_params() { kw_params__lang "$@"; echo_vars "$@"; } # echo all keyword params
|
716
|
|
717
|
## functions
|
718
|
|
719
|
# usage: local func=...; set_func_loc; use $file, $line
|
720
|
alias set_func_loc="$(cat <<'EOF'
|
721
|
: "${func:?}"
|
722
|
local func_info="$(shopt -s extdebug; declare -F "$func")" # 'func line file'
|
723
|
func_info="${func_info#$func }"
|
724
|
local line="${func_info%% *}"
|
725
|
local file="${func_info#$line }"
|
726
|
EOF
|
727
|
)"
|
728
|
|
729
|
fi # load new aliases
|
730
|
if self_being_included; then
|
731
|
|
732
|
func_loc() # gets where function declared in the format file:line
|
733
|
{
|
734
|
local func="$1"; set_func_loc
|
735
|
file="$(canon_rel_path "$file")" || return
|
736
|
echo "$file:$line"
|
737
|
}
|
738
|
|
739
|
# usage: func() { [minor=1] echo_func; ... }
|
740
|
function echo_func()
|
741
|
# usage: "echo_func" "$FUNCNAME" "$@" && indent || true
|
742
|
# exit status: whether function call was echoed
|
743
|
{
|
744
|
log_local; log++; can_log || return
|
745
|
local func="$1"; shift
|
746
|
local loc; loc="$(log++ func_loc "$func")" || return
|
747
|
echo_cmd "$loc" "$func" "$@"
|
748
|
}
|
749
|
# see echo_func alias after stub
|
750
|
|
751
|
fi # load new aliases
|
752
|
if self_being_included; then
|
753
|
|
754
|
|
755
|
#### streams
|
756
|
|
757
|
fd_exists() { (: <&"$1") 2>/dev/null; }
|
758
|
|
759
|
require_fd_not_exists() # usage: require_fd_not_exists fd || return 0
|
760
|
{ ! fd_exists "$1" || type=info die "fd $1 already exists, skipping"; }
|
761
|
|
762
|
set_fds() # usage: set_fds redirect...
|
763
|
# WARNING: does not currently support redirecting an fd to itself (due to bash
|
764
|
# bug that requires the dest fd to be closed before it can be reopened)
|
765
|
{
|
766
|
echo_func
|
767
|
|
768
|
# add #<>&- before every #<>&# reopen to fix strange bash bug
|
769
|
local redirs=() i
|
770
|
for i in "$@"; do
|
771
|
# remove empty redirects resulting from using `redirs= cmd...` to clear
|
772
|
# the redirs and then using $redirs as an array
|
773
|
if test "$i"; then
|
774
|
local redir_prefix="$(match_prefix '*[<>]' "$i")"
|
775
|
local dest="$( rm_prefix '*[<>]' "$i")"
|
776
|
if test "$dest" && ! starts_with '&' "$dest"; then # escape dest
|
777
|
i="$redir_prefix$(printf %q "$dest")"
|
778
|
fi
|
779
|
if test "$redir_prefix"; then redirs+=("$redir_prefix&-"); fi
|
780
|
redirs+=("$i")
|
781
|
fi
|
782
|
done
|
783
|
set -- "${redirs[@]}"
|
784
|
|
785
|
if (($# > 0)); then echo_eval exec "$@"; fi
|
786
|
}
|
787
|
|
788
|
fd_set_default() # usage: fd_set_default 'dest[<>]src'
|
789
|
{
|
790
|
echo_func
|
791
|
local dest="${1%%[<>]*}"
|
792
|
require_fd_not_exists "$dest" || return 0
|
793
|
set_fds "$1"
|
794
|
}
|
795
|
|
796
|
stdout2fd() # usage: fd=# stdout2fd cmd...
|
797
|
{
|
798
|
echo_func; kw_params fd; : "${fd?}"
|
799
|
if test "$fd" != 1; then local redirs=(">&$fd" "${redirs[@]}"); fi
|
800
|
redir "$@"
|
801
|
}
|
802
|
|
803
|
function filter_fd() # usage: (fd=# [redirs=] filter_fd filter_cmd...; \
|
804
|
# with filter...) # be sure ${redirs[@]} is not set to an outer value
|
805
|
# useful e.g. to filter logging output or highlight errors
|
806
|
{
|
807
|
echo_func; kw_params fd; : "${fd?}"
|
808
|
set_fds "$fd>" >(pipe_delay; stdout2fd "$@")
|
809
|
pipe_delay; pipe_delay # wait for >()'s pipe_delay and initial logging
|
810
|
}
|
811
|
alias filter_fd='"filter_fd" ' # last space alias-expands next word
|
812
|
|
813
|
stderr2stdout() # usage: { stderr2stdout cmd...|use stderr...; } 41>&1
|
814
|
# **IMPORTANT**: fd 41 must later be redirected back to fd 1
|
815
|
# unlike `2>&1`, logs stderr
|
816
|
# redirects the command stdout to fd 41 to avoid collision with stderr
|
817
|
{
|
818
|
echo_func
|
819
|
# command causes log_fd to be re-filtered, so that stderr is also filtered.
|
820
|
# fd 2 is *not* redirected back to fd 2, to allow log-filtering out an
|
821
|
# otherwise-confusing benign error.
|
822
|
"$@" 2> >(command tee /dev/fd/"$log_fd") >&41 # redirects 2->{1,log_fd}
|
823
|
}
|
824
|
|
825
|
stdout_contains()
|
826
|
# usage: { stderr2stdout cmd|stdout_contains echo_run grep ...; } 41>&1
|
827
|
{ echo_func; pipe_delay; pipe_delay; pipe_delay; "$@"|echo_stdout >/dev/null; }
|
828
|
|
829
|
stderr_matches() # usage: pattern=... [ignore_e=#] stderr_matches cmd...
|
830
|
{
|
831
|
echo_func; kw_params pattern ignore_e; : "${pattern?}"
|
832
|
if test "$ignore_e"; then local benign_error=1; fi
|
833
|
|
834
|
# not necessary to allow callers to handle the error themselves (which would
|
835
|
# require *every* caller to wrap this function in prep_try/rethrow), because
|
836
|
# they would just handle it by errexiting anyways
|
837
|
prep_try
|
838
|
|
839
|
set +o errexit # avoid errexiting since @PIPESTATUS will be used instead
|
840
|
{ stderr2stdout "$@"|stdout_contains echo_run grep -E "$pattern"; } 41>&1
|
841
|
local PIPESTATUS_=("${PIPESTATUS[@]}") # save b/c it's reset after each cmd
|
842
|
set -o errexit
|
843
|
|
844
|
# handle any error
|
845
|
e="${PIPESTATUS_[0]}" # 1st command's exit status -> $e
|
846
|
ignore_e "$ignore_e" # also works w/ ignore_e=''
|
847
|
rethrow_exit
|
848
|
|
849
|
return "${PIPESTATUS_[1]}" # 2nd command's exit status -> $?
|
850
|
}
|
851
|
|
852
|
fi # load new aliases
|
853
|
if self_being_included; then
|
854
|
|
855
|
function ignore_err_msg() # usage: pattern=... ignore_err_msg cmd...
|
856
|
# unlike `|| true`, this suppresses only errors caused by a particular error
|
857
|
# *message*, rather than all error exit statuses
|
858
|
{
|
859
|
echo_func; kw_params pattern; : "${pattern?}"
|
860
|
stderr_matches "$@" || true # also ignore false exit status on no match
|
861
|
}
|
862
|
alias ignore_err_msg='"ignore_err_msg" ' # last space alias-expands next word
|
863
|
|
864
|
# convention: use fd 40/41/42 for command-specific alternate stdin/stdout/stderr
|
865
|
# mnemonic: 4 looks like A for Alternate
|
866
|
# do NOT use 1x, which are used by eval (which is used by set_fds())
|
867
|
# do NOT use 2x, which we use as global stdin/stdout/stderr
|
868
|
# do NOT use 3x, which we use for logging
|
869
|
|
870
|
setup_log_fd() # view logging output at verbosity >= 5
|
871
|
{
|
872
|
log_local; log+ 4; log-- echo_func
|
873
|
fd_set_default '30>&2' || true # stdlog
|
874
|
log_fd=30 # stdlog
|
875
|
}
|
876
|
setup_log_fd
|
877
|
|
878
|
set_global_fds()
|
879
|
# allows commands to access global stdin/stdout/stderr using fd 20/21/22
|
880
|
# this works even when /dev/tty isn't available
|
881
|
# view logging output at verbosity >= 3
|
882
|
{
|
883
|
log_local; log+ 2; log-- echo_func
|
884
|
# ignore errors if a source fd isn't open
|
885
|
fd_set_default '20<&0' || true
|
886
|
fd_set_default '21>&1' || true
|
887
|
fd_set_default '22>&2' || true
|
888
|
}
|
889
|
set_global_fds
|
890
|
|
891
|
# usage: explicit_errors_only=1 script...
|
892
|
# show only explicitly-displayed errors (which have been redirected to fd 22)
|
893
|
# most of the time this has the same effect as `verbosity=0 script...`,
|
894
|
# which displays everything that isn't explicitly hidden
|
895
|
# this option should only be used for testing the explicit error displaying
|
896
|
if test "$explicit_errors_only"; then disable_logging; fi
|
897
|
|
898
|
|
899
|
echo_vars is_outermost
|
900
|
|
901
|
|
902
|
#### paths
|
903
|
|
904
|
top_script="${BASH_SOURCE[${#BASH_SOURCE[@]}-1]}"
|
905
|
# outermost script; unlike $0, also defined for .-scripts
|
906
|
|
907
|
top_symlink_dir="$(dirname "$top_script")"; echo_vars top_symlink_dir
|
908
|
top_symlink_dir_abs="$(realpath "$top_symlink_dir")"
|
909
|
echo_vars top_symlink_dir_abs
|
910
|
|
911
|
top_script_abs="$(realpath "$top_script")"; echo_vars top_script_abs
|
912
|
# realpath this before doing any cd so this points to the right place
|
913
|
top_dir_abs="$(dirname "$top_script_abs")"; echo_vars top_dir_abs
|
914
|
|
915
|
set_paths()
|
916
|
{
|
917
|
top_script="$(log++ canon_rel_path "$top_script_abs")" || return
|
918
|
echo_vars top_script
|
919
|
top_dir="$(dirname "$top_script")" || return; echo_vars top_dir
|
920
|
}
|
921
|
set_paths
|
922
|
|
923
|
# usage: $(enter_top_dir; cmd...)
|
924
|
function enter_top_dir() { echo_func; cd "$top_dir"; }
|
925
|
alias enter_top_dir='log++; "enter_top_dir"'
|
926
|
|
927
|
# usage: in_top_dir cmd...
|
928
|
function in_top_dir() { echo_func; (enter_top_dir; "$@"); }
|
929
|
alias in_top_dir='"in_top_dir" ' # last space alias-expands next word
|
930
|
|
931
|
PATH_rm() # usage: PATH_rm path... # removes components from the PATH
|
932
|
{
|
933
|
echo_func; echo_vars PATH; : "${PATH?}"
|
934
|
log_local
|
935
|
log+ 2
|
936
|
split : "$PATH"
|
937
|
local new_paths=()
|
938
|
for path in "${parts[@]}"; do
|
939
|
if ! contains "$path" "$@"; then new_paths+=("$path"); fi
|
940
|
done
|
941
|
PATH="$(delim=: join "${new_paths[@]}")" || return
|
942
|
log- 2
|
943
|
echo_vars PATH
|
944
|
}
|
945
|
|
946
|
no_PATH_recursion() # usage: (no_PATH_recursion; cmd...)
|
947
|
# allows running a system command of the same name as the script
|
948
|
{
|
949
|
echo_func
|
950
|
PATH_rm "$top_dir_abs" "$top_symlink_dir" "$top_symlink_dir_abs" "$top_dir"
|
951
|
}
|
952
|
|
953
|
# makes command in $1 nonrecursive
|
954
|
# allows running a system command of the same name as the script
|
955
|
alias cmd2abs_path="$(cat <<'EOF'
|
956
|
declare _1="$1"; shift
|
957
|
_1="$(indent; no_PATH_recursion; log++; which "$_1"|echo_stdout)" || return
|
958
|
set -- "$_1" "$@"
|
959
|
EOF
|
960
|
)"
|
961
|
|
962
|
|
963
|
#### verbose output
|
964
|
|
965
|
|
966
|
## internal commands
|
967
|
|
968
|
.()
|
969
|
{
|
970
|
log++ log++ echo_func
|
971
|
cmd2rel_path; set -- "$FUNCNAME" "$@"
|
972
|
if (log++; echo_params; can_log); then indent; fi
|
973
|
builtin "$@"
|
974
|
}
|
975
|
|
976
|
.rel() # usage: .rel file [args...] # file relative to ${BASH_SOURCE[0]} dir
|
977
|
{
|
978
|
log++ log++ echo_func; local file="$1"; shift
|
979
|
. "$(canon_rel_path "$(dirname "$(realpath "${BASH_SOURCE[1]}")")/$file")" \
|
980
|
"$@"
|
981
|
}
|
982
|
|
983
|
cd() # indent is permanent within subshell cd was used in
|
984
|
{
|
985
|
log_local; log++ echo_func
|
986
|
cmd2rel_path; echo_cmd "$FUNCNAME" "$@"
|
987
|
if can_log; then caller_indent; fi
|
988
|
# -P: expand symlinks so $PWD matches the output of realpath
|
989
|
builtin "$FUNCNAME" -P "$@"
|
990
|
|
991
|
func=realpath clear_cache
|
992
|
set_paths
|
993
|
}
|
994
|
|
995
|
## external commands
|
996
|
|
997
|
disable_logging() { set_fds "$log_fd>/dev/null"; }
|
998
|
|
999
|
function redir() # usage: local redirs=(#<>...); redir cmd...; unset redirs
|
1000
|
# to view only explicitly-displayed errors: explicit_errors_only=1 script...
|
1001
|
{
|
1002
|
echo_func; kw_params redirs
|
1003
|
|
1004
|
case "$1" in redir|command) "$@"; return;; esac # redir will be run later
|
1005
|
(
|
1006
|
log++ set_fds "${redirs[@]}"
|
1007
|
unset redirs # don't redirect again in invoked command
|
1008
|
(case "$1" in command__exec) shift;; esac; echo_redirs_cmd)
|
1009
|
"$@"
|
1010
|
) || return
|
1011
|
}
|
1012
|
alias redir='"redir" ' # last space alias-expands next word
|
1013
|
|
1014
|
alias_append save_e '; unset redirs' # don't redirect error handlers
|
1015
|
|
1016
|
fi # load new aliases
|
1017
|
if self_being_included; then
|
1018
|
|
1019
|
command() # usage: [cmd_log_fd=|1|2|#] [verbosity_min=] [nonrecursive=1] \
|
1020
|
# command extern_cmd...
|
1021
|
{
|
1022
|
echo_func; kw_params log_fd cmd_log_fd redirs verbosity_min
|
1023
|
# if no cmd_log_fd, limit log_fd in case command uses util.sh
|
1024
|
local cmd_log_fd="${cmd_log_fd-$log_fd}"
|
1025
|
local redirs=("${redirs[@]}")
|
1026
|
|
1027
|
# determine redirections
|
1028
|
if test "$cmd_log_fd"; then
|
1029
|
if can_log; then
|
1030
|
if test "$cmd_log_fd" != "$log_fd"; then
|
1031
|
redirs+=("$cmd_log_fd>&$log_fd")
|
1032
|
fi # else no redir needed
|
1033
|
else redirs+=("$cmd_log_fd>/dev/null");
|
1034
|
fi
|
1035
|
fi
|
1036
|
|
1037
|
if test "$nonrecursive"; then cmd2abs_path; else cmd2rel_path; fi
|
1038
|
redir command__exec "$@" || die_e
|
1039
|
}
|
1040
|
command__exec()
|
1041
|
{
|
1042
|
ensure_nested_func
|
1043
|
if can_log; then indent; fi
|
1044
|
if test "$verbosity_min"; then verbosity_min "$verbosity_min"; fi
|
1045
|
verbosity_compat
|
1046
|
builtin command "$@"
|
1047
|
}
|
1048
|
|
1049
|
|
1050
|
### external command input/output
|
1051
|
|
1052
|
echo_stdin() # usage: input|echo_stdin|cmd
|
1053
|
{
|
1054
|
if can_log; then
|
1055
|
pipe_delay
|
1056
|
echo ----- >&"$log_fd"
|
1057
|
tee -a /dev/fd/"$log_fd";
|
1058
|
echo ----- >&"$log_fd"
|
1059
|
else cat
|
1060
|
fi
|
1061
|
}
|
1062
|
|
1063
|
echo_stdout() { echo_stdin; } # usage: cmd|echo_stdout
|
1064
|
|
1065
|
|
1066
|
#### commands
|
1067
|
|
1068
|
already_exists_msg() # usage: cond || what=... already_exists_msg || return 0
|
1069
|
{
|
1070
|
type=info die "$what"' already exists, skipping
|
1071
|
[0;7m to force-remake, prepend `rm=1` to the command [0m'
|
1072
|
}
|
1073
|
|
1074
|
require_not_exists() # usage: require_not_exists file || return 0
|
1075
|
{ test ! -e "$1" || what="file \"$1\"" already_exists_msg; }
|
1076
|
|
1077
|
function to_file() # usage: stdout=... [if_not_exists=1] [del=] to_file cmd...
|
1078
|
# auto-removes a command's output file on error (like make's .DELETE_ON_ERROR)
|
1079
|
{
|
1080
|
echo_func; kw_params stdout if_not_exists del
|
1081
|
: "${stdout?}"; local del="${del-1}"
|
1082
|
if test "$if_not_exists"; then require_not_exists "$stdout" || return 0; fi
|
1083
|
|
1084
|
local redirs=("${redirs[@]}" ">$stdout")
|
1085
|
redir "$@" || { save_e; test ! "$del" || rm "$stdout"; rethrow; }
|
1086
|
}
|
1087
|
alias to_file='"to_file" ' # last space alias-expands next word
|
1088
|
|
1089
|
log_bg() { symbol='&' log_custom "$@"; }
|
1090
|
|
1091
|
log_last_bg() { log_bg '$!='"$!"; }
|
1092
|
|
1093
|
function bg_cmd() # usage: bg_cmd cmd...
|
1094
|
{ echo_func; log_bg "$@"; "$@" & log_last_bg; }
|
1095
|
alias bg_cmd='"bg_cmd" ' # last space alias-expands next word
|
1096
|
|
1097
|
|
1098
|
#### filesystem
|
1099
|
|
1100
|
alias mkdir='mkdir -p'
|
1101
|
|
1102
|
alias file_size=\
|
1103
|
"stat `case "$(uname)" in Darwin) echo -f %z;; *) echo --format=%s;; esac`"
|
1104
|
|
1105
|
alias wildcard='shopt -s nullglob; echo' # usage: "$(wildcard glob...)"
|
1106
|
alias wildcard1='shopt -s nullglob; echo1' # usage: "$(wildcard1 glob...)"
|
1107
|
|
1108
|
fi # load new aliases
|
1109
|
if self_being_included; then
|
1110
|
|
1111
|
mv2dir() { echo_func; mkdir "${!#}"; mv "$@"; } # usage: mv2dir ... dir
|
1112
|
|
1113
|
# usage: (mv_glob ... dir)
|
1114
|
function mv_glob() { echo_func; if (($# > 1)); then mv2dir "$@"; fi; }
|
1115
|
alias mv_glob='shopt -s nullglob; "mv_glob"'
|
1116
|
|
1117
|
|
1118
|
#### URLs
|
1119
|
|
1120
|
localize_url() { test _"$1" = _"$(hostname -f)" || echo "$1"; }
|
1121
|
|
1122
|
fi
|