posix-shell: utils: Add automeson()

This function allows to run `meson compile -C <build-dir>` always for a
given build directory whenever an also given file is written.

This is especially useful to edit LaTeX files and let them update
automatically on each save of the editor with automeson, meson and
latexmk.

The performance is so good that it speeds up the LaTeX and especially
TikZ development significantly.

1 files changed, 23 insertions, 0 deletions

diff --git a/posix-shell/utils.sh b/posix-shell/utils.sh
index b21c09b..0d71901 100644
--- a/posix-shell/utils.sh
+++ b/posix-shell/utils.sh
@@ -276,3 +276,26 @@ hexdiff() {
 
 	rm -f "$dump1" "$dump2"
 }
+
+automeson() {
+	if test "$#" -ne 2
+	then
+		echo "Usage: automeson <build-dir> <file-to-watch>"
+		return 1
+	fi
+
+	build="$1"
+	file="$2"
+
+	while true
+	do
+		inotifywait --quiet --event close_write "$file"
+		clear
+		if meson compile -C "$build"
+		then
+			printf '\033[32mOK\033[0m\n'
+		else
+			printf '\033[31mFAILED\033[0m\n'
+		fi
+	done
+}