git : Remove misleading variables (#146)

* remove misleading ppa value

* add test

* nit

* bump version

src/git/devcontainer-feature.json

 {
     "id": "git",
-    "version": "1.0.2",
+    "version": "1.0.3",
     "name": "Git (from source)",
     "documentationURL": "https://github.com/devcontainers/features/tree/main/src/git",
     "description": "Install an up-to-date version of Git, built from source as needed. Useful for when you want the latest and greatest features. Auto-detects latest stable version and installs needed dependencies.",

src/git/install.sh

@@ -7,8 +7,8 @@
 # Docs: https://github.com/microsoft/vscode-dev-containers/blob/main/script-library/docs/git-from-src.md
 # Maintainer: The VS Code and Codespaces Teams
 
-GIT_VERSION=${VERSION:-"latest"} # 'system' checks the base image first, else installs 'latest'
-USE_PPA_IF_AVAILABLE=${PPA:-"false"}
+GIT_VERSION=${VERSION} # 'system' checks the base image first, else installs 'latest'
+USE_PPA_IF_AVAILABLE=${PPA}
 
 GIT_CORE_PPA_ARCHIVE_GPG_KEY=E1DD270288B4E6030699E45FA1715D88E1DF1F24
 GPG_KEY_SERVERS="keyserver hkp://keyserver.ubuntu.com:80

test/git/install_git_from_src.sh

+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+check "version" git  --version
+check "gettext" dpkg-query -l gettext
+
+# Report result
+reportResults

test/git/scenarios.json

+{
+    "install_git_from_src": {
+        "image": "ubuntu:focal",
+        "features": {
+            "git": {
+                "version": "latest",
+                "ppa": "false"
+            }
+        }
+    }
+}