feat: add lib-github feature

src/lib-github/devcontainer-feature.json

@@ -0,0 +1,22 @@
+{
+    "name": "Library - GitHub",
+    "id": "lib-github",
+    "version": "1.0.0",
+    "description": "A feature that contains utilities to fetch releases from GitHub",
+    "keywords": ["library"],
+    "options": {
+        "baseDir": {
+            "type": "string",
+            "default": "/usr/share/phorcys-devcontainer-libraries",
+            "description": "Select the base directory where the library should be installed"
+        }
+    },
+
+    "installsAfter": [
+        "ghcr.io/devcontainers/features/common-utils"
+    ],
+
+    "dependsOn": [
+        "ghcr.io/phorcys420/devcontainer-features/lib-common:1"
+    ]
+}

src/lib-github/install.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+FEATURE_NAME="github"
+echo "Activating feature '$FEATURE_NAME'"
+
+# Define the base directory where the feature libraries are stored
+BASE_DIR=${BASEDIR:-"/usr/share/phorcys-devcontainer-libraries"}
+
+# Source lib-common feature
+source "$BASE_DIR/common/main.sh"
+
+# Grab current feature version and split it in parts
+VERSION=$(getFeatureVersion)
+VERSION_PARTS=($(getVersionParts "$VERSION"))
+
+# Define the installation directory for the current feature and the current feature version
+FEATURE_DIR="$BASE_DIR/$FEATURE_NAME"
+INSTALL_DIR="$FEATURE_DIR/$VERSION"
+
+# Create directory for current feature version
+echo "[$FEATURE_NAME] [+] Installing library to $INSTALL_DIR"
+mkdir --parents "$INSTALL_DIR"
+cp --recursive src/. "$INSTALL_DIR"
+
+# Make links to each subversion (e.g if version is 1.0.0, then link to 1.0 and 1) and "current"
+SUBFOLDERS=(
+    "${VERSION_PARTS[0]}.${VERSION_PARTS[1]}", # 1.0
+    "${VERSION_PARTS[0]}", # 1
+    "current"
+)
+
+for SUBFOLDER in "${SUBFOLDERS[@]}"
+do
+    ln --symbolic --force "$INSTALL_DIR" "$FEATURE_DIR/$SUBFOLDER"
+done

src/lib-github/src/main.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+getRelease() {
+    REPOSITORY=$1
+    TAG=${2:-latest}
+
+    if [ $TAG = "latest" ]; then
+        RELEASE_API_URL="https://api.github.com/repos/$REPOSITORY/releases/latest"
+    else
+        RELEASE_API_URL="https://api.github.com/repos/$REPOSITORY/releases/tags/$TAG"
+    fi
+
+    curl "$RELEASE_API_URL" --silent --show-error
+}
+
+# Check for necessary packages
+checkPackages curl jq