1 files changed, 110 insertions, 0 deletions
diff --git a/misc/launch b/misc/launch
new file mode 100755
index 0000000..5947ae7
--- /dev/null
+++ b/misc/launch
@@ -0,0 +1,110 @@
+#!/bin/sh
+awk=awk
+me() { basename "$0"; }
+
+printhelp() {
+cat << HELPDOC
+Usage:
+  $(me): [-gh] [COMMAND] [COMMAND ARGS]...
+
+Args:
+  -g, --gen-cache : Force generate cache
+  -h, --help      : show this help message
+
+Config Syntax:
+  +host [HOSTNAME]
+    Add a new host. Hosts can be referenced using their number starting with 1.
+  [COMMAND]
+    launch [COMMAND] will start the process specified for the specific hostname. Aliases are separated by |.
+  [TAB][SHELL]
+    Run this shell command when the above [COMMAND] is specified. In order of hostnames. Can be a number to reference to a hostname, a '-' to disregard this command for the specific host, or a '^' to reference the previous command.
+HELPDOC
+}
+
+# Make sure user is using GNU Awk (gawk)
+checkawk() {
+	if ! ($awk -V >/dev/null 2>/dev/null && $awk -V | grep "GNU Awk" >/dev/null); then
+		if command -v gawk > /dev/null; then
+			awk=gawk
+		else
+			echo "$(me) requires GNU Awk (gawk) to function properly. Please install GNU Awk and try again."
+			exit 0
+		fi
+	fi
+}
+
+gencache() {
+$awk '
+BEGIN {
+	print "run=\"$1\"; shift"
+	print "case \"$run\" in"
+}
+{
+	sub(/#.*/, "") # Remove comments
+	if (!/^\s*$/) {
+		if (/^\+host/) {
+			sub(/\s*\+host\s*/, "")
+			h++
+			hosts[h] = $0
+		}
+		else {
+			if (!/^\t/) {
+				hostnum = 1
+				o++
+				opts[o] = $0
+			}
+			else {
+				sub(/^\t/, "")
+				if ($0 == "^")
+					$0 = cache
+				else if ($0 ~ /^[0-9]*$/)
+					$0 = cmds[hosts[$0]":"opts[o]]
+				cmds[hosts[hostnum]":"opts[o]] = cache = $0
+				hostnum++
+			}
+		}
+	}
+}
+END {
+	for (host in hosts) {
+		if (hosts[host] != "'`hostname`'")
+			continue
+		for (cmd in cmds) {
+			if (cmd ~ hosts[host] && cmds[cmd] && cmds[cmd] != "-") {
+				i = cmd
+				sub(/.*:/, "", cmd)
+				print "\t"cmd") "cmds[i]" \"$@\" & ;;"
+			}
+		}
+	}
+	print "\t*) command -v \"$run\" >/dev/null && exec \"$run\" \"$@\" || echo \"\\`$run${@:+ $@}\\` Does not exist or exited with an error\" ;;"
+	print "esac"
+}
+' $conf > $cache
+chmod +x $cache
+}
+
+# Config file setup
+confdir=${XDG_CONFIG_HOME:-~/.config}/launch
+conf=$confdir/config
+if [ ! -e $conf ]; then
+	mkdir -p $confdir
+	echo "#HOSTS\n+host $(hostname)\n\n#OPTS\ntest\n\techo \"Tested!\"" > $conf
+	echo "No config file exists! new config file created at $conf! Exiting\n"
+	printhelp
+	exit 1
+fi
+
+# Cache file setup
+cachedir=${XDG_CACHE_HOME:-~/.cache}/launch
+cache=$cachedir/cache
+[ ! -e $cache ] && mkdir -p $cachedir && gencache
+[ $conf -nt $cache ] && gencache
+
+# Command line options
+checkawk
+case "$1" in
+	-g|--gen-cache) echo "Generating new cache: $cache"; gencache && cat $cache ;;
+	-h|--help|'') printhelp ;;
+	*) exec $cache "$@" ;; # Run
+esac