feat: Implement prepare-commit-msg-context feature

.github/workflows/test.yaml

@@ -13,8 +13,7 @@ jobs:
     strategy:
       matrix:
         features:
-          - color
-          - hello
+          - prepare-commit-msg-context
         baseImage:
           - debian:latest
           - ubuntu:latest
@@ -34,8 +33,7 @@ jobs:
     strategy:
       matrix:
         features:
-          - color
-          - hello
+          - prepare-commit-msg-context
     steps:
       - uses: actions/checkout@v3
 

src/prepare-commit-msg-context/devcontainer-feature.json

@@ -0,0 +1,8 @@
+{
+  "name": "prepare-commit-msg-context",
+  "id": "prepare-commit-msg-context",
+  "version": "1.0.0",
+  "description": "Install a prepare-commit-msg hook script to /usr/local/share(the script writes the commit content as a comment).",
+  "options": {},
+  "installsAfter": []
+}

src/prepare-commit-msg-context/install.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env sh
+
+INSTALL_DIR="/usr/local/share/prepare-commit-msg-context"
+
+set -e
+
+test -d "${INSTALL_DIR}" || mkdir -p "${INSTALL_DIR}"
+cp "$(dirname "${0}")/prepare-commit-msg" "${INSTALL_DIR}/prepare-commit-msg"
+chmod a+x  "${INSTALL_DIR}/prepare-commit-msg"

src/prepare-commit-msg-context/prepare-commit-msg

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -e
+
+COMMIT_MSG_FILE="${1}"
+COMMIT_SOURCE=$2
+SHA1=$3
+
+echo "" >> "${COMMIT_MSG_FILE}"
+git diff --cached | sed 's/^/# /' >> "${COMMIT_MSG_FILE}"
+
+case "$COMMIT_SOURCE,$SHA1" in
+    ,|template,)
+        echo "" >> "${COMMIT_MSG_FILE}"
+        echo "# Recent History" >> "${COMMIT_MSG_FILE}"
+        git log --oneline --graph --decorate -n 10 | sed 's/^/# /' >> "${COMMIT_MSG_FILE}" ;;
+    *) ;;
+esac

test/_global/scenarios.json

@@ -0,0 +1 @@
+{}

test/prepare-commit-msg-context/basic.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+set -e
+
+# Optional: Import test library bundled with the devcontainer CLI
+# Provides the 'check' and 'reportResults' commands.
+source dev-container-features-test-lib
+
+# Check for installed features
+check "Check prepare-commit-msg is installed" test -x /usr/local/share/prepare-commit-msg-context/prepare-commit-msg
+
+# Check for working features
+git config --global user.email "you@example.com"
+git config --global user.name "Your Name"
+git config --global init.defaultBranch main
+# Make temp repo
+TEMP_FILE=$(mktemp)
+TEMP_DIR=$(mktemp -d)
+pushd "${TEMP_DIR}"
+git init
+git commit --allow-empty -m "Initial commit"
+echo "test" > test.txt
+git add test.txt
+# Run prepare-commit-msg
+/usr/local/share/prepare-commit-msg-context/prepare-commit-msg "${TEMP_FILE}"
+popd
+check "Check prepare-commit-msg-context is working" diff <(sed -e 's/.\+ Initial commit/---/' < "${TEMP_FILE}") expected.txt
+
+# Report result
+# If any of the checks above exited with a non-zero exit code, the test will fail.
+reportResults

test/prepare-commit-msg-context/expected.txt

@@ -0,0 +1,11 @@
+
+# diff --git a/test.txt b/test.txt
+# new file mode 100644
+# index 0000000..9daeafb
+# --- /dev/null
+# +++ b/test.txt
+# @@ -0,0 +1 @@
+# +test
+
+# Recent History
+---

test/prepare-commit-msg-context/scenarios.json

@@ -0,0 +1,15 @@
+{
+  "basic": {
+    "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
+    "features": {
+      "ghcr.io/devcontainers/features/common-utils:1": {
+        "installZsh": false,
+        "installOhMyZsh": false,
+        "upgradePackages": false,
+        "username": "node"
+      },
+      "prepare-commit-msg-context": {}
+    },
+    "remoteUser": "node"
+  }
+}

test/prepare-commit-msg-context/test.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+set -e
+
+# Optional: Import test library bundled with the devcontainer CLI
+# Provides the 'check' and 'reportResults' commands.
+source dev-container-features-test-lib
+
+# Check for installed features
+check "Check prepare-commit-msg is installed" test -x /usr/local/share/prepare-commit-msg-context/prepare-commit-msg
+
+# Report result
+# If any of the checks above exited with a non-zero exit code, the test will fail.
+reportResults