41ef15fde2
This avoids a few forks, and is a good example of how to do some "modern" sh programming. Plus we now use fewer lines of code.
107 lines
2 KiB
Bash
Executable file
107 lines
2 KiB
Bash
Executable file
#!/bin/sh
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#
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# A minimal alternative to djb redo that doesn't support incremental builds.
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# For the full version, visit http://github.com/apenwarr/redo
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#
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# The author disclaims copyright to this source file and hereby places it in
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# the public domain. (2010 12 14)
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#
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_dirsplit()
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{
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base=${1##*/}
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dir=${1%$base}
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}
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_dirsplit "$0"
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export REDO=$(cd "${dir:-.}" && echo "$PWD/$base")
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if [ -z "$DO_BUILT" ]; then
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export DO_BUILT=$PWD/.do_built
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if [ -e "$DO_BUILT" ]; then
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echo "Removing previously built files..." >&2
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sort -u "$DO_BUILT" | tee "$DO_BUILT.new" |
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while read f; do rm -f "$f" 2>/dev/null; done
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mv "$DO_BUILT.new" "$DO_BUILT"
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fi
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DO_PATH=$DO_BUILT.dir
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export PATH=$DO_PATH:$PATH
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rm -rf "$DO_PATH"
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mkdir "$DO_PATH"
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for d in redo redo-ifchange; do
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ln -s "$REDO" "$DO_PATH/$d";
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done
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[ -e /bin/true ] && TRUE=/bin/true || TRUE=/usr/bin/true
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for d in redo-ifcreate redo-stamp redo-always; do
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ln -s $TRUE "$DO_PATH/$d";
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done
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fi
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_find_dofile()
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{
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DOFILE=default.$1.do
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while :; do
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DOFILE=default.${DOFILE#default.*.}
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[ -e "$DOFILE" -o "$DOFILE" = default.do ] && break
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done
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EXT=${DOFILE#default}
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EXT=${EXT%.do}
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BASE=${1%$EXT}
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}
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_run_dofile()
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{
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export DO_DEPTH="$DO_DEPTH "
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export REDO_TARGET=$PWD/$TARGET
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set -e
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. "$PWD/$DOFILE" >"$TARGET.tmp"
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}
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_do()
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{
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DIR=$1
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TARGET=$2
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if [ ! -e "$TARGET" ]; then
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printf '\033[32mdo %s\033[1m%s\033[m\n' \
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"$DO_DEPTH" "$DIR$TARGET" >&2
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echo "$PWD/$TARGET" >>"$DO_BUILT"
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DOFILE=$TARGET.do
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BASE=$TARGET
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EXT=
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[ -e "$TARGET.do" ] || _find_dofile "$TARGET"
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if [ ! -e "$DOFILE" ]; then
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echo "do: $TARGET: no .do file" >&2
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return 1
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fi
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( _run_dofile "$BASE" "$EXT" "$TARGET.tmp" )
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RV=$?
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if [ $RV != 0 ]; then
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printf "do: %s%s\n" "$DO_DEPTH" \
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"$DIR$TARGET: got exit code $RV" >&2
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return $RV
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fi
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mv "$TARGET.tmp" "$TARGET" 2>/dev/null
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: >>"$TARGET"
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else
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echo "do $DO_DEPTH$TARGET exists." >&2
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fi
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}
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redo()
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{
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for i in "$@"; do
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_dirsplit "$i"
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( cd "$dir" && _do "$dir" "$base" ) || return 1
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done
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}
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set -e
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if [ -n "$*" ]; then
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redo "$@"
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else
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redo all
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fi
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