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#!/bin/bash -e
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# runscripts: a bash-based replacement for make
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# unlike make, supports full bash functionality including multiline commands
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# usage: .../run function args
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# this usage also applies to all files that include this file
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if false; then #### runscript template:
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#!/bin/bash -e
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auto_fwd=1 # optional
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. "$(dirname "${BASH_SOURCE[0]}")"/path/to/util_or_file_including_util.run "$@"
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.rel other_includes
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target()
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{
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begin_target
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#...
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}
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all()
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{
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begin_target
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target # defined above
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"$(dirname "${BASH_SOURCE[0]}")"/path_relative_to_self
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"$(dirname "${BASH_SOURCE[1]}")"/path_relative_to_caller
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"$top_dir"/path_relative_to_outermost_script
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}
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on_exit # needed if should be runnable as shell-include (with leading ".")
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fi ####
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. "$(dirname "${BASH_SOURCE[0]}")"/../sh/util.sh
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.rel ../sh/make.sh
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if self_not_included; then
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#### setup
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# allow caller to override, eg. to force runscript mode when using $wrap_fn
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: "${is_runscript=$(ends_with '[/.]run' "$top_script_abs"; exit2bool)}"
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unexport is_runscript # don't pass to invoked scripts
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if is_dot_script; then
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if test "$1" = .; then set --; fi # $@ wrong: no args->contains script name
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include_args=("$@") # from `. .../util.run "$@"`
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fi
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fallback() # overridable handler for targets w/o function
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{ echo_func; "$@"; } # by default, generate error that it doesn't exist
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gateway() # overridable handler for *all* targets
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{
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echo_func
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test $# -gt 0 || set -- main # default target
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if is_callable "$1"; then "$@"; else fallback "$@"; fi
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}
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if test ! "$is_runscript"; then # non-runscript
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gateway() { echo_func; main "$@"; } # pass all args to main()
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fi
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run_args_cmd() # runs the command line args command
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{
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if is_dot_script; then set -- "${include_args[@]}"
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else eval set -- "$(reverse "${BASH_ARGV[@]}")"
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fi
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echo_cmd "$top_script" "$@"
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indent; time gateway "$@"
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}
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# users can override run_args_cmd()/gateway()/fallback() to perform other
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# commands (or no commands) after the script is read
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on_exit() { test $? -eq 0 || return; run_args_cmd; }
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if ! is_dot_script; then trap on_exit EXIT; fi
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func_override set_paths__util_sh
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set_paths()
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{
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set_paths__util_sh "$@"
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log_local; log++
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top_file="${top_script%[./]run}"; echo_vars top_file
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top_filename="$(basename "$top_file")"; echo_vars top_filename
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}
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set_paths
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#### utils
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# usage: sudo $wrap_fn fn ...
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wrap_fn="$(esc "$top_script")"
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# if sudo to non-root and $top_script not world-executable, produces error
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# invoked script must always run as runscript so that wrapped command is run
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if test ! "$is_runscript"; then wrap_fn="env is_runscript=1 $wrap_fn"; fi
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func_override sudo__util_sh
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function sudo() # usage: sudo fn|cmd ... # supports shell functions as well
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{
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echo_func
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if test "$1" = command; then shift # always executable->$wrap_fn not needed
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elif is_intern "$1"; then set -- $wrap_fn "$@" # shell function, etc.
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fi
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sudo__util_sh "$@"
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}
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# usage: to_top_file cmd...
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function to_top_file()
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{
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echo_func
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stdout="$top_file" if_not_exists="$(bool! "$_remake")" to_file "$@"
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}
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alias to_top_file='"to_top_file" ' # last space alias-expands next word
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,() # usage: .../run , cmd1 cmd2 ... (like `make cmd1 cmd2 ...`)
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# treats each of the command-line args as commands the way make does
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# (instead of as args to the same command, the way runscripts do)
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{ begin_target; for cmd in "$@"; do time with_rm echo_run "$cmd"; done; }
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: "${auto_ignore=}" #usage: auto_ignore=1 .../__.run target_that_might_not_exist
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unexport auto_ignore # don't pass this to invoked scripts except through fwd()
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if test "$auto_ignore"; then
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fallback() # don't generate error that it doesn't exist
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{ echo_func; log_info "ignoring non-existant target: $*"; }
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fi
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# by default, use all subdirs, including .*
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if ! isset subdirs; then subdirs=($(enter_top_dir; wildcard. {.,}*/)); fi
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echo_vars subdirs
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fwd() # usage: [subdirs=(...);] fwd target args... # or use fwd_self
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{
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echo_func
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: "${subdirs?}"
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local_export auto_ignore=1
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for subdir in "${subdirs[@]}"; do
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local runscript="$top_dir"/"$subdir"/run
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if test -f "$runscript"; then "$runscript" "$@"; fi
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done
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}
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alias fwd_self='fwd "$FUNCNAME" "$@"' # usage: target() { ...; fwd_self; }
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: "${auto_fwd=}" # usage: auto_fwd=1; . .../file_including_util.run
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# must be set *after* auto_ignore's fallback() to overwrite it
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if test "$auto_fwd"; then
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fallback() { echo_func; fwd "$@"; }
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fi
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#### `make` compatibility
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main() { begin_target; with_rm all; } # support conventional `all` target
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fi
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