x: be more flexible when finding run.sh

Signed-off-by: Alejandro Mery <amery@jpi.io>

files/bin/x

@@ -2,28 +2,64 @@
 
 set -eu
 
-# find root of the "workspace"
-find_repo_workspace_root() {
-	if [ -d "$1/.repo" ]; then
-		echo "$1"
-	elif [ "${1:-/}" != / ]; then
-		find_repo_workspace_root "${1%/*}"
-	fi
+brute_find() {
+	local op="$1" cue="$2" dir="$3"
+
+	while true; do
+
+		if [ $op "$dir/$cue" ]; then
+			echo "$dir"
+		elif [ / != "${dir:-/}" ]; then
+			dir="${dir%/*}"
+			continue
+		fi
+
+		return
+	done
 }
 
-WS="$(find_repo_workspace_root "$PWD")"
-if [ -z "$WS" ]; then
-	# find root of .git repository
-	WS="$(git rev-parse --show-superproject-working-tree 2> /dev/null || true)"
-	[ -d "$WS" ] || WS="$(git rev-parse --show-toplevel 2> /dev/null || true)"
-fi
+find_run_sh() {
+	local dir="${1:-$PWD}"
+	local try_repo=true
+	local ws=
 
-if [ -d "$WS" ]; then
-	if [ -x "$WS/run.sh" ]; then
-		exec "$WS/run.sh" "$@"
-	fi
-fi
+	while true; do
+
+		[ "$PWD" = "$dir" ] || cd "$dir"
+
+		# find root of repo workspace
+		if $try_repo; then
+			ws="$(brute_find -d .repo "$PWD")"
+			[ -d "$ws" ] || try_repo=false
+		fi
+
+		# or find root of .git repository
+		if [ ! -d "$ws" ]; then
+			ws="$(git rev-parse --show-superproject-working-tree 2> /dev/null || true)"
+			[ -d "$ws" ] || ws="$(git rev-parse --show-toplevel 2> /dev/null || true)"
+		fi
+
+		if [ ! -d "$ws" ]; then
+			# no repo? find anything then
+			dir="$(brute_find -x run.sh "$PWD")"
+			[ -z "$dir" ] || echo "$dir/run.sh"
+		elif [ -x "$ws/run.sh" ]; then
+			# found at repo's root
+			echo "$ws/run.sh"
+		elif [ / != "${ws:-/}" ]; then
+			# check on the parent's then
+			dir="${ws%/*}"
+			ws=
+			continue
+		fi
+
+		return
+	done
+}
 
-if [ "$#" -gt 0 ]; then
+run_sh="$(find_run_sh)"
+if [ -x "$run_sh" ]; then
+	exec "$run_sh" "$@"
+elif [ "$#" -gt 0 ]; then
 	exec "$@"
 fi