diff options
| author | EuAndreh <eu@euandre.org> | 2024-05-08 06:39:31 -0300 |
|---|---|---|
| committer | EuAndreh <eu@euandre.org> | 2024-05-08 08:24:02 -0300 |
| commit | 6fe3c4bb709da54c1529fc56f5005462990617f2 (patch) | |
| tree | 83f3056855889b8ff1ccd9de5cb6a743fa2e5c67 /src | |
| parent | src/uuid: Add working utility (diff) | |
| download | eut-6fe3c4bb709da54c1529fc56f5005462990617f2.tar.gz eut-6fe3c4bb709da54c1529fc56f5005462990617f2.tar.xz | |
src/assert-arg: Add working utility
Diffstat (limited to 'src')
| -rwxr-xr-x | src/assert-arg | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/assert-arg b/src/assert-arg new file mode 100755 index 0000000..8eaaea8 --- /dev/null +++ b/src/assert-arg @@ -0,0 +1,30 @@ +#!/bin/sh +set -eu + +usage() { + cat <<-'EOF' + Usage: + assert-arg [--] STRING MESSAGE + EOF +} + + +if [ "${1:-}" = '--' ]; then + shift +fi + +if [ $# -ne 2 ]; then + usage >&2 + exit 2 +fi + +STRING="$1" +MESSAGE="$2" + +if [ -z "$STRING" ]; then + printf 'Missing %s.\n\n' "$MESSAGE" >&2 + cat <<-'EOF' + usage >&2 + exit 2 + EOF +fi |