Add pre-commit hook to validate composer.json

.pre-commit-config.yaml

@@ -0,0 +1,18 @@
+# Pre-commit git hooks.
+#
+# Usage:
+#   1. Run one of:
+#     $ pip install pre-commit
+#     $ brew install pre-commit
+#
+#   2. Install hooks
+#     $ pre-commit install
+repos:
+- repo: local
+  hooks:
+  - id: composer-validate
+    name: composer-validate
+    language: script
+    entry: scripts/pre-commit.sh
+    files: 'composer\.json'
+    pass_filenames: true

scripts/pre-commit.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+list_of_files="${@}"
+for file in $list_of_files; do
+    if [[ "${file}" == "composer.json" ]]; then
+        $(which composer) validate
+        exit "${?}"
+    else
+        echo "unsupported file: ${file}"
+        exit 1
+    fi
+done
+
+exit 0