bin/80: Add helper utility

1 files changed, 85 insertions, 0 deletions

diff --git a/bin/80 b/bin/80
new file mode 100755
index 0000000..b971f5d
--- /dev/null
+++ b/bin/80
@@ -0,0 +1,85 @@
+#!/bin/sh
+set -eu
+
+usage() {
+	cat <<-'EOF'
+		Usage:
+		  80 [FILENAME...]
+		  80 -h
+	EOF
+}
+
+help() {
+	cat <<-'EOF'
+
+		Options:
+		  -h, --help    show this message
+
+		  FILENAME      the name of the file to work on (default:
+				the list of file in the VCS repository)
+
+
+		List the lines in the files that contain more than 80 columns.
+
+
+		Examples:
+
+		  Check for all the files in the current repository:
+
+		    $ 80
+
+
+		  Detect on the given two files:
+
+		    $ 80 f1 f2
+	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))
+
+len() {
+	awk '
+	length > 80 {
+		printf "%s:%s:%s\n", FILENAME, FNR, $0
+	}
+	' "$1"
+}
+
+if [ $# = 0 ]; then
+	vcs ls-files | while read -r f; do
+		len "$f"
+	done
+else
+	for f in "$@"; do
+		len "$f"
+	done
+fi