Revision 3772
Added by Aaron Marcuse-Kubitza over 12 years ago
| bin/expand_braces | ||
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#!/bin/sh |
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#!/bin/bash
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# Expands bash-style {} expressions.
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# See <http://www.gnu.org/software/bash/manual/bash.html#Brace-Expansion>. |
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# Filters each line from stdin to stdout. |
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echoEach () { local line; for line in "$@"; do echo "$line"; done; }
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braceKeepRe="./'{'"
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braceKeepRepl="./{"
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singleQuote="'" |
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singleQuoteEsc="'\''" |
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CR=$'\r' |
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LF=$'\n' |
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while true; do |
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line="$(head -1)" # get next line from stdin; $() strips trailing newlines |
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read # get next line from stdin; strips trailing newlines |
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line="$REPLY" |
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test -z "$line" && break # EOF if no line or empty line |
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line="$(echo "$line"|sed -e "s/[^{,}]+/'&'/g")" # escape special chars
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line="${line//$braceKeepRe/$braceKeepRepl}" # don't expand ./{
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eval "echoEach $line" # brace-expand $line |
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line="${line//$CR/}" # remove \r
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line="${line//$singleQuote/$singleQuoteEsc}" # escape single quotes
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# Escape non-brace chars; don't expand ./{
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line="$(echo "$line"\ |
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|sed -e "s/[^{,}]+/'&'/g"|sed -e "s/\.\/'\{'([^}]*)'\}'/.\/{\1}/g")"
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eval echoEach $line # brace-expand $line |
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done |
Also available in: Unified diff
expand_braces: Fixed bug where `head -1` seemed to read more lines than just the first, causing EOF to be returned after the first line, by using `read` instead. Support data containing \r (such as Excel-dialect CSVs) by removing it. Fixed bug where ./{...} was not being properly escaped.