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executable file 151 lines (132 sloc) 3.129 kB
#!/bin/sh
#
# A minimal alternative to djb redo that doesn't support incremental builds.
# For the full version, visit http://github.com/apenwarr/redo
#
# The author disclaims copyright to this source file and hereby places it in
# the public domain. (2010 12 14)
#
# By default, no output coloring.
GREEN=""
BOLD=""
PLAIN=""
if [ -n "$TERM" -a "$TERM" != "dumb" ] && tty <&2 >/dev/null 2>&1; then
GREEN="$(printf '\033[32m')"
BOLD="$(printf '\033[1m')"
PLAIN="$(printf '\033[m')"
fi
_dirsplit()
{
base=${1##*/}
dir=${1%$base}
}
_dirsplit "$0"
export REDO=$(cd "${dir:-.}" && echo "$PWD/$base")
DO_TOP=
if [ -z "$DO_BUILT" ]; then
DO_TOP=1
[ -n "$*" ] || set all # only toplevel redo has a default target
export DO_BUILT=$PWD/.do_built
: >>"$DO_BUILT"
echo "Removing previously built files..." >&2
sort -u "$DO_BUILT" | tee "$DO_BUILT.new" |
while read f; do printf "%s\0%s.did\0" "$f" "$f"; done |
xargs -0 rm -f 2>/dev/null
mv "$DO_BUILT.new" "$DO_BUILT"
DO_PATH=$DO_BUILT.dir
export PATH=$DO_PATH:$PATH
rm -rf "$DO_PATH"
mkdir "$DO_PATH"
for d in redo redo-ifchange; do
ln -s "$REDO" "$DO_PATH/$d";
done
[ -e /bin/true ] && TRUE=/bin/true || TRUE=/usr/bin/true
for d in redo-ifcreate redo-stamp redo-always; do
ln -s $TRUE "$DO_PATH/$d";
done
fi
_find_dofile_pwd()
{
DOFILE=default.$1.do
while :; do
DOFILE=default.${DOFILE#default.*.}
[ -e "$DOFILE" -o "$DOFILE" = default.do ] && break
done
EXT=${DOFILE#default}
EXT=${EXT%.do}
BASE=${1%$EXT}
}
_find_dofile()
{
PREFIX=
while :; do
_find_dofile_pwd "$1"
[ -e "$DOFILE" ] && break
[ "$PWD" = "/" ] && break
TARGET=${PWD##*/}/$TARGET
PREFIX=${PWD##*/}/$PREFIX
cd ..
done
BASE=$PREFIX$BASE
}
_run_dofile()
{
export DO_DEPTH="$DO_DEPTH "
export REDO_TARGET=$PWD/$TARGET
set -e
read line1 <"$PWD/$DOFILE"
cmd=${line1#"#!/"}
if [ "$cmd" != "$line1" ]; then
/$cmd "$PWD/$DOFILE" "$@" >"$TARGET.tmp2"
else
. "$PWD/$DOFILE" >"$TARGET.tmp2"
fi
}
_do()
{
DIR=$1
TARGET=$2
if [ ! -e "$TARGET" ] || [ -e "$TARGET/." -a ! -e "$TARGET.did" ]; then
printf '%sdo %s%s%s%s\n' \
"$GREEN" "$DO_DEPTH" "$BOLD" "$DIR$TARGET" "$PLAIN" >&2
echo "$PWD/$TARGET" >>"$DO_BUILT"
DOFILE=$TARGET.do
BASE=$TARGET
EXT=
[ -e "$TARGET.do" ] || _find_dofile "$TARGET"
if [ ! -e "$DOFILE" ]; then
echo "do: $TARGET: no .do file" >&2
return 1
fi
[ ! -e "$DO_BUILD" ] || : >>"$TARGET.did"
( _run_dofile "$BASE" "$EXT" "$TARGET.tmp" )
RV=$?
if [ $RV != 0 ]; then
printf "do: %s%s\n" "$DO_DEPTH" \
"$DIR$TARGET: got exit code $RV" >&2
rm -f "$TARGET.tmp" "$TARGET.tmp2"
return $RV
fi
mv "$TARGET.tmp" "$TARGET" 2>/dev/null ||
! test -s "$TARGET.tmp2" ||
mv "$TARGET.tmp2" "$TARGET" 2>/dev/null
rm -f "$TARGET.tmp2"
else
echo "do $DO_DEPTH$TARGET exists." >&2
fi
}
redo()
{
for i in "$@"; do
_dirsplit "$i"
( cd "$dir" && _do "$dir" "$base" ) || return 1
done
}
set -e
redo "$@"
if [ -n "$DO_TOP" ]; then
echo "Removing stamp files..." >&2
[ ! -e "$DO_BUILT" ] ||
while read f; do printf "%s.did\0" "$f"; done <"$DO_BUILT" |
xargs -0 rm -f 2>/dev/null
fi
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