githook: POSIX compliance

clickusagelib/githook.py

@@ -3,16 +3,11 @@ from pathlib import Path
 
 PRE_PUSH_SCRIPT = """#!/bin/sh
 
-if [[ ! -z "$VIRTUAL_ENV" ]]
-then
-    while read -d $'\0' arg ; do
-        if [[ "$arg" == '--follow-tags' ]] ; then
-            clickusagemd run ${GIT_DIR}pyproject.toml || exit 1
-            git add ${GIT_DIR}USAGE.md || exit 1
-            git commit -m"Autogenerated USAGE.md updated and added."
-            exit 0
-        fi
-    done < /proc/$PPID/cmdline
+set -e
+
+if [ -n "$VIRTUAL_ENV" ] && grep -qz '^--follow-tags$' /proc/$PPID/cmdline; then
+    clickusagemd run ${GIT_DIR}pyproject.toml
+    git commit -m "Updated USAGE.md" ${GIT_DIR}USAGE.md
 fi
 
 exit 0