shake

commit 79f83c96550ce40f2cb975a71fc441504acb28f9
parent 6037e5a59dd80820ff649e5adca0cc694a810d83
Author: Jul <jul@9o.is>
Date:   Sun, 15 Mar 2026 23:33:06 +0800

add groupin/groupout functions

Diffstat:
M
README.md
 | 
18
++++++++++++++++++
M
shake
 | 
55
+++++++++++++++++++++++++++++++++++++++++++++++--------

2 files changed, 65 insertions(+), 8 deletions(-)
diff --git a/README.md b/README.md
@@ -216,6 +216,24 @@ Include shared definitions with `import`:
 import rules.sh
 ```
 
+### Grouping build inputs and outputs
+
+Build inputs and outputs are tracked by shake. You can group inputs or outputs
+using an extended regular expression pattern to create a phony target.
+
+For example, the following creates a phony headers target and groups all generated header files:
+
+```sh
+groupout headers '.*\.h$'
+```
+
+If you need to fetch source files and extract them into `src/` subdirectory before
+compiling, the following groups all src files to depend on the phony fetch target:
+
+```sh
+groupin fetch '\$dir/src/.*'
+```
+
 ## Examples
 
 See the `example/` directory for working examples:
diff --git a/shake b/shake
@@ -83,24 +83,55 @@ _shake_open() {
 _shake_close() {
 	_f=$SHAKEFILE
 
-	gen $_f.ninja $_f.ins $_f.out: - $GEN_FILES
-	phony ninja: $NINJA_FILES
-
-	exec 3>&-
 	exec 4>&-
 	exec 5>&-
+	wait
+
+	if [ ! "$TARGET" ] || [ $TARGET = "$DIR" ]; then
+		sort -u $_f.ins.tmp -o $_f.ins
+		sort -u $_f.out.tmp -o $_f.out
+		rm -f $_f.ins.tmp
+		rm -f $_f.out.tmp
+
+		if [ "${SHAKE_GROUPIN-}" ]; then
+			set -- $SHAKE_GROUPIN
+			while [ "${1-}" ] && [ "${2-}" ]; do
+				if grep -E "$2" $_f.ins 2>/dev/null >$SHAKEDIR/$1.ins; then
+					printf 'build ' >&3
+					cat $SHAKEDIR/$1.ins | tr '\n' ' ' >&3
+					printf ': phony $dir/%s\n' "$1" >&3
+				fi
+				shift 2
+			done
+			unset -v SHAKE_GROUPIN
+		fi
+
+		if [ "${SHAKE_GROUPOUT-}" ]; then
+			set -- $SHAKE_GROUPOUT
+			while [ "${1-}" ] && [ "${2-}" ]; do
+				if grep -E "$2" $_f.out 2>/dev/null >$SHAKEDIR/$1.out; then
+					printf 'build $dir/%s: phony ' "$1" >&3
+					cat $SHAKEDIR/$1.out | tr '\n' ' ' >&3
+					printf '\n' >&3
+				fi
+				shift 2
+			done
+			unset -v SHAKE_GROUPOUT
+		fi
 
+		printf 'build %s: gen | %s\n' "$_f.ninja $_f.ins $_f.out" "$GEN_FILES" >&3
+		printf 'build $dir/ninja: phony %s\n' "$NINJA_FILES" >&3
+	fi
+
+	exec 3>&-
 	wait
+
 	if [ ! "$TARGET" ] || [ $TARGET = "$DIR" ]; then
 		if cmp -s $_f.ninja.tmp $_f.ninja; then
 			rm -f $_f.ninja.tmp
 		else
 			mv $_f.ninja.tmp $_f.ninja
 		fi
-		sort -u $_f.ins.tmp -o $_f.ins
-		sort -u $_f.out.tmp -o $_f.out
-		rm -f $_f.ins.tmp
-		rm -f $_f.out.tmp
 	fi
 }
 
@@ -228,6 +259,14 @@ phony() {
 	build phony $*
 }
 
+groupin() {
+	SHAKE_GROUPIN="${SHAKE_GROUPIN-} $1 $2"
+}
+
+groupout() {
+	SHAKE_GROUPOUT="${SHAKE_GROUPOUT-} $1 $2"
+}
+
 error() {
 	printf "shake: %s: %s\n" "$DIR" "$*" >&2
 	exit 1