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# Various helper functions for redo
# URL: https://github.com/cemkeylan/redo-lib
# LICENSE: CC0 (Public Domain)
# 'basename' is not used by the functions here, but it doesn't mean that it
# cannot be used at all.
# shellcheck disable=2034
target=$1 basename=$2 dest=$3
# Add dependency to these files as well.
redo-ifchange lib.rc config.rc
setv() {
# Usage: setv [variable = [key...]]
#
# Variable setting function that somewhat imitates the Makefile syntax.
# - Using == sets the variable.
# - Using = sets the variable if it is unset.
# - Using += increments to a variable.
[ "$3" ] || {
printf '%s\n' "Faulty variable syntax" >&2
exit 1
}
var=$1 sym=$2; shift 2
case "$sym" in
==) export "$var=$*" ;;
=) eval "[ \"\$$var\" ]" || export "$var=$*" ;;
+=) eval export "$var=\$$var $*"
esac
}
targcheck() {
# Usage: targcheck [target...]
#
# Check if current target is one of the given arguments of this function.
# Returns 0 if target is one of the arguments, returns 1 if not.
for arg; do
[ "$arg" = "$target" ] && return 0
done; return 1
}
PHONY() {
# Usage: PHONY [target...]
#
# Function that resembles the .PHONY: target on the classic 'make' system.
# You can either use it without an argument on a single target, or specify
# multiple targets.
if [ -z "$1" ] || targcheck "$@"; then
# There is no guarantee that the value of dest will not be modified
# during the operation, we want to evaluate the value of $dest as soon
# as possible
# shellcheck disable=2064
trap "rm -f $dest" EXIT INT
fi
}
expsuf() {
# Usage: expsuf [suffix [item...]]
#
# Expand suffix for the given list.
suffix=$1 buf=; shift
for i; do buf="$buf $i$suffix "; done; printf %s "$buf"
}
repsuf() {
# Usage: repsuf [old-suffix new-suffix [item...]]
#
# Replace old-suffix with new-suffix on list.
oldsuffix=$1 newsuffix=$2 buf=; shift 2
for i; do buf="$buf ${i%$oldsuffix}$newsuffix "; done; printf %s "$buf"
}
redo_clean() {
# Clean function for various redo implementations
[ -r .do_built ] && {
while read -r file; do
[ -d "$file" ] || rm -f "$file"
done < .do_built
}
find . -type f \( -name '*.tmp' -o -name '*.did' -o -name '.dep*' -o -name '.target*' \) \
-exec rm -f -- {} +
[ "$DO_BUILT" ] || find . -name '.do_built*' -exec rm -rf -- {} +
[ "$REDO_BASE" ] || rm -rf -- .redo
}
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