bin/x: Add semi-working version

No support for the '|' pipe operator.

1 files changed, 94 insertions, 0 deletions

diff --git a/bin/x b/bin/x
new file mode 100755
index 0000000..ed967a5
--- /dev/null
+++ b/bin/x
@@ -0,0 +1,94 @@
+#!/bin/sh
+set -eu
+
+usage() {
+	cat <<-'EOF'
+		Usage:
+		  x COMMANDS... [ '&&' / '||' / '|' ] COMMANDS...
+		  x -h
+	EOF
+}
+
+help() {
+	cat <<-'EOF'
+
+		Options:
+		  -h, --help    show this message
+
+		  COMMAND       the command to be executed
+		  &&            "AND" logical operator
+		  ||            "OR" logical operator
+		  |             pipe operator
+
+
+		Run command chained together with operators.
+
+
+		Examples:
+
+		  Measure the time of two commands:
+
+		    $ time x sleep 1 '&&' sleep 2
+		    # same as:
+		    $ time sh -c 'sleep 1 && sleep 2'
+
+
+		  Notify when either of the commands finish:
+
+		    $ boop x cmd-1 '||' cmd-2
+	EOF
+}
+
+for flag in "$@"; do
+	case "$flag" in
+		--)
+			break
+			;;
+		--help)
+			usage
+			help
+			exit
+			;;
+		*)
+			;;
+	esac
+done
+
+while getopts 'h' flag; do
+	case "$flag" in
+		h)
+			usage
+			help
+			exit
+			;;
+		*)
+			usage >&2
+			exit 2
+			;;
+	esac
+done
+shift $((OPTIND - 1))
+
+
+CMD=''
+for arg in "$@"; do
+	case "$arg" in
+		'&&'|'||')
+			set +e
+			sh -c "$CMD"
+			STATUS=$?
+			set -e
+			CMD=''
+			if   [ "$arg" = '&&' ] && [ "$STATUS" != 0 ]; then
+				exit "$STATUS"
+			elif [ "$arg" = '||' ] && [ "$STATUS" = 0  ]; then
+				exit 0
+			fi
+			;;
+		*)
+			CMD="$CMD${CMD:+ }'$arg'"
+			;;
+	esac
+done
+
+sh -c "$CMD"