feat: implement apko-specific download logic

LICENSE

@@ -1,8 +1,6 @@
-TODO: INSERT YOUR NAME  COPYRIGHT YEAR (if applicable to your license)
-
 MIT License
 
-Copyright (c) [year] [fullname]
+Copyright (c) 2024-present Claudio Beatrice
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -15,10 +15,7 @@
 
 # Dependencies
 
-**TODO: adapt this section**
-
-- `bash`, `curl`, `tar`, and [POSIX utilities](https://pubs.opengroup.org/onlinepubs/9699919799/idx/utilities.html).
-- `SOME_ENV_VAR`: set this environment variable in your shell config to load the correct version of tool x.
+- `melange`: while not strictly required, apko needs apks built by melange in order to package them into an image
 
 # Install
 

bin/download

@@ -10,7 +10,6 @@ source "${plugin_dir}/lib/utils.bash"
 
 mkdir -p "$ASDF_DOWNLOAD_PATH"
 
-# TODO: Adapt this to proper extension and adapt extracting strategy.
 release_file="$ASDF_DOWNLOAD_PATH/$TOOL_NAME-$ASDF_INSTALL_VERSION.tar.gz"
 
 # Download tar.gz file to the download directory

contributing.md

@@ -5,7 +5,6 @@ Testing Locally:
 ```shell
 asdf plugin test <plugin-name> <plugin-url> [--asdf-tool-version <version>] [--asdf-plugin-gitref <git-ref>] [test-command*]
 
-# TODO: adapt this
 asdf plugin test apko https://github.com/omissis/asdf-apko.git "apko --help"
 ```
 

lib/utils.bash

@@ -2,7 +2,6 @@
 
 set -euo pipefail
 
-# TODO: Ensure this is the correct GitHub homepage where releases can be downloaded for apko.
 GH_REPO="https://github.com/chainguard-dev/apko"
 TOOL_NAME="apko"
 TOOL_TEST="apko --help"
@@ -14,7 +13,6 @@ fail() {
 
 curl_opts=(-fsSL)
 
-# NOTE: You might want to remove this if apko is not hosted on GitHub releases.
 if [ -n "${GITHUB_API_TOKEN:-}" ]; then
 	curl_opts=("${curl_opts[@]}" -H "Authorization: token $GITHUB_API_TOKEN")
 fi
@@ -27,12 +25,10 @@ sort_versions() {
 list_github_tags() {
 	git ls-remote --tags --refs "$GH_REPO" |
 		grep -o 'refs/tags/.*' | cut -d/ -f3- |
-		sed 's/^v//' # NOTE: You might want to adapt this sed to remove non-version strings from tags
+		sed 's/^v//'
 }
 
 list_all_versions() {
-	# TODO: Adapt this. By default we simply list the tag names from GitHub releases.
-	# Change this function if apko has other means of determining installable versions.
 	list_github_tags
 }
 
@@ -41,8 +37,7 @@ download_release() {
 	version="$1"
 	filename="$2"
 
-	# TODO: Adapt the release URL convention for apko
-	url="$GH_REPO/archive/v${version}.tar.gz"
+	url="$GH_REPO/releases/download/v${version}/apko_${version}_$(get_platform)_$(get_arch).tar.gz"
 
 	echo "* Downloading $TOOL_NAME release $version..."
 	curl "${curl_opts[@]}" -o "$filename" -C - "$url" || fail "Could not download $url"
@@ -61,7 +56,6 @@ install_version() {
 		mkdir -p "$install_path"
 		cp -r "$ASDF_DOWNLOAD_PATH"/* "$install_path"
 
-		# TODO: Assert apko executable exists.
 		local tool_cmd
 		tool_cmd="$(echo "$TOOL_TEST" | cut -d' ' -f1)"
 		test -x "$install_path/$tool_cmd" || fail "Expected $install_path/$tool_cmd to be executable."
@@ -72,3 +66,26 @@ install_version() {
 		fail "An error occurred while installing $TOOL_NAME $version."
 	)
 }
+
+get_platform() {
+	uname | tr '[:upper:]' '[:lower:]'
+}
+
+get_arch() {
+	local arch=""
+
+	case "$(uname -m)" in
+	x86_64 | amd64) arch="amd64" ;;
+	i686 | i386) arch="386" ;;
+	armv6l) arch="armv6" ;;
+	armv7l) arch="armv7" ;;
+	aarch64 | arm64) arch="arm64" ;;
+	ppc64le) arch="ppc64le" ;;
+	*)
+		echo "Arch '$(uname -m)' not supported!" >&2
+		exit 1
+		;;
+	esac
+
+	echo -n $arch
+}