feat: initial

action.yml

@@ -0,0 +1,143 @@
+name: "Install STACKIT CLI"
+description: "Installs the STACKIT CLI application."
+inputs:
+  version:
+    description: "Version of STACKIT CLI to install, e.g. v0.59.0. If left empty, the latest version will be installed."
+    required: false
+    default: ""
+
+runs:
+  using: "composite"
+  steps:
+    - name: Install requirements
+      shell: sh # alpine may not have bash pre-installed
+      run: |
+        set -e
+
+        if command -v curl >/dev/null 2>&1 && command -v jq >/dev/null 2>&1; then
+          echo "curl and jq are already installed, skipping installation."
+        else
+          if command -v apt-get >/dev/null 2>&1; then
+            apt-get -y update
+            apt-get -y install curl jq
+          elif command -v apk >/dev/null 2>&1; then
+            apk add --no-cache curl jq bash
+          else
+            echo "::error::No supported package manager (apt-get, apk) found."
+            exit 1
+          fi
+        fi
+    - name: Install STACKIT CLI
+      shell: bash
+      env:
+        STACKIT_CLI_VERSION: ${{ inputs.version }}
+      run: |
+        set -eo pipefail
+
+        REPO="stackitcloud/stackit-cli"
+
+        OS="$(uname -s | tr '[:upper:]' '[:lower:]')"
+        ARCH="$(uname -m)"
+
+        if [ "$ARCH" = "x86_64" ] || [ "$ARCH" = "amd64" ]; then
+          ARCH="amd64"
+        elif [ "$ARCH" = "aarch64" ] || [ "$ARCH" = "arm64" ]; then
+          ARCH="arm64"
+        fi
+
+        CACHE_BASE="${RUNNER_TOOL_CACHE:-/opt/hostedtoolcache}/stackit-cli"
+
+        # try to load stackit cli from hosted tools cache
+        if [ -n "$STACKIT_CLI_VERSION" ]; then
+          TOOL_CACHE_FILE="$CACHE_BASE/$STACKIT_CLI_VERSION/$ARCH/stackit"
+          
+          # if file exists in hosted tools cache, symlink it
+          if [ -x "$TOOL_CACHE_FILE" ]; then
+            echo "::group::Linking from hosted tool cache"
+            ln -sf "$TOOL_CACHE_FILE" /usr/local/bin/stackit
+            echo "::endgroup::"
+            exit 0
+          fi
+        fi
+
+        echo "::group::Determining STACKIT CLI version"
+        # if no version is provided, use latest
+        if [ -z "$STACKIT_CLI_VERSION" ]; then
+          API_URL="https://api.github.com/repos/$REPO/releases/latest"
+        else
+          API_URL="https://api.github.com/repos/$REPO/releases/tags/$STACKIT_CLI_VERSION"
+        fi
+
+        RELEASES_JSON="$(curl -s "$API_URL")"
+        VERSION="$(echo "$RELEASES_JSON" | jq -r '.tag_name')"        
+
+        if [ -z "$VERSION" ] || [ "$VERSION" = "null" ]; then
+          echo "Failed to fetch release information. Please check if the version exists."
+          exit 1
+        fi
+
+        echo "Installing STACKIT CLI $VERSION"
+        echo "::endgroup::"
+
+        # check if latest binary is already present on this runner
+        TOOL_CACHE_DIR="$CACHE_BASE/$VERSION/$ARCH"
+        TOOL_CACHE_FILE="$TOOL_CACHE_DIR/stackit"
+
+        if [ -x "$TOOL_CACHE_FILE" ]; then
+          echo "::group::Linking from hosted tool cache"
+          ln -sf "$TOOL_CACHE_FILE" /usr/local/bin/stackit
+          echo "::endgroup::"
+          exit 0
+        fi
+
+        # prepare binary download
+        DOWNLOAD_DIR="$(mktemp -d)"
+
+        # always delete download dir when script exits
+        trap 'rm -rf "$DOWNLOAD_DIR"' EXIT
+
+        cd "$DOWNLOAD_DIR"
+
+        RELEASE_ASSET="$(echo "$RELEASES_JSON" | jq -r --arg os "$OS" --arg arch "$ARCH" \
+          '.assets[] | select(.name | endswith($os + "_" + $arch + ".tar.gz"))')"
+
+        if [ -z "$RELEASE_ASSET" ] || [ "$RELEASE_ASSET" = "null" ]; then
+          echo "No matching release found for OS=$OS, ARCH=$ARCH."
+          exit 1
+        fi
+
+        ARCHIVE_NAME="$(echo "$RELEASE_ASSET" | jq -r '.name')"
+        ARCHIVE_DOWNLOAD_URL="$(echo "$RELEASE_ASSET" | jq -r '.browser_download_url')"
+
+        CHECKSUMS_DOWNLOAD_URL="$(echo "$RELEASES_JSON" | jq -r '.assets[] | select(.name | contains("checksums.txt")) | .browser_download_url')" 
+        CHECKSUMS="checksums.txt"
+
+        if [ -z "$CHECKSUMS_DOWNLOAD_URL" ] || [ "$CHECKSUMS_DOWNLOAD_URL" = "null" ]; then
+          echo "No checksum file available in release assets."
+          exit 1
+        fi
+
+        echo "::group::Downloading assets and verifying integrity"
+        # download binary and checksums (-f for fail fast)
+        curl -fLO "$ARCHIVE_DOWNLOAD_URL"
+        curl -fLo "$CHECKSUMS" "$CHECKSUMS_DOWNLOAD_URL"
+
+        grep "$ARCHIVE_NAME" "$CHECKSUMS" | sha256sum -c -
+        echo "::endgroup::"
+
+        echo "::group::Installing into hosted tool cache"
+        mkdir stackit-cli
+        tar -xzvf "$ARCHIVE_NAME" -C stackit-cli
+
+        # save to tool cache
+        mkdir -p "$TOOL_CACHE_DIR"
+        mv ./stackit-cli/stackit "$TOOL_CACHE_FILE"
+
+        # symlink
+        ln -sf "$TOOL_CACHE_FILE" /usr/local/bin/stackit
+        echo "::endgroup::"
+
+        cd "$GITHUB_WORKSPACE"
+    - name: Print version
+      shell: sh
+      run: stackit --version