contrib: add kiss-exec

FossilOrigin-Name: 59a86c20536e077ffe51f1e9e04af6644fe20b85f3ff2c5ee2a9231a4e78edea

2 files changed, 26 insertions, 0 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 59a4eb7..7a0fdef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,9 @@ this project _somewhat_ adheres to [Semantic Versioning].
 UNRELEASED
 ----------
 
+### Added
+- Added `kiss-exec`, a tool to execute commands inside the alternatives system.
+
 ### Changed
 - Replaced `KISS_COLOUR` with `KISS_COLOR` to match upstream.
 - Renamed `colour` variable to `color` for consistency.
diff --git a/contrib/kiss-exec b/contrib/kiss-exec
new file mode 100755
index 0000000..d2b3217
--- /dev/null
+++ b/contrib/kiss-exec
@@ -0,0 +1,23 @@
+#!/bin/sh
+# Execute a command inside the alternatives system
+
+usage() {
+    printf '\033[1;33m-> \033[m%s\n' "usage: ${0##*/} [pkg] [command]"
+    exit "$1"
+}
+
+case "$1" in ''|--help|-h) usage 0; esac
+[ "$2" ] || usage 1
+
+pkg=$1
+
+[ "${2##/*}" ] && command=">usr>bin>$2" ||
+    command="$(printf '%s' "$2" | sed 's#/#>#g')"
+
+[ -h "${file:=/var/db/kiss/choices/$pkg$command}" ] && {
+    printf 'ERROR: %s\n' "$file is a symlink"
+    exit 1
+}
+
+shift 2
+exec "/var/db/kiss/choices/$pkg$command" "$@"