Nick/neos 232 add helmfile dev container feature (#6)

* adds helmfile src

* Adds helmfile tests

* adds helmfile workflow tests

* bumps version of sqlc and ctlptl for readme generation

.github/workflows/test.yaml

@@ -15,6 +15,7 @@ jobs:
         features:
           - sqlc
           - ctlptl
+          - helmfile
         baseImage:
           # - debian:latest
           # - ubuntu:latest
@@ -37,6 +38,7 @@ jobs:
         features:
           - sqlc
           - ctlptl
+          - helmfile
     steps:
       - uses: actions/checkout@v3
 

src/ctlptl/devcontainer-feature.json

@@ -1,9 +1,9 @@
 {
     "id": "ctlptl",
     "name": "ctlptl",
-    "version": "0.1.0",
+    "version": "0.1.1",
     "description": "Making local Kubernetes clusters fun and easy to set up",
-    "documentationURL": "https://docs.sqlc.dev/en/stable",
+    "documentationURL": "https://github.com/tilt-dev/ctlptl",
     "options": {
         "version": {
             "type": "string",

src/helmfile/devcontainer-feature.json

@@ -0,0 +1,21 @@
+{
+    "id": "helmfile",
+    "name": "helmfile",
+    "version": "0.1.0",
+    "description": "Declaratively deploy your Kubernetes manifests, Kustomize configs, and Charts as Helm releases.",
+    "documentationURL": "https://helmfile.readthedocs.io",
+    "options": {
+        "version": {
+            "type": "string",
+            "proposals": [
+                "latest",
+                "v0.158.0"
+            ],
+            "default": "latest",
+            "description": "Select or enter a helmfile version."
+        }
+    },
+    "installsAfter": [
+        "ghcr.io/devcontainers-contrib/features/gh-release"
+    ]
+}

src/helmfile/install.sh

@@ -0,0 +1,23 @@
+#!/bin/bash -i
+
+set -e
+
+. ./library_scripts.sh
+
+# nanolayer is a cli utility which keeps container layers as small as possible
+# source code: https://github.com/devcontainers-contrib/nanolayer
+# `ensure_nanolayer` is a bash function that will find any existing nanolayer installations,
+# and if missing - will download a temporary copy that automatically get deleted at the end
+# of the script
+ensure_nanolayer nanolayer_location "v0.5.3"
+
+$nanolayer_location \
+    install \
+    devcontainer-feature \
+    "ghcr.io/devcontainers-contrib/features/gh-release:1.0.24" \
+        --option repo='helmfile/helmfile' \
+        --option binaryNames='helmfile' \
+        --option version="$VERSION" \
+        --option assetRegex='.*\.tar\.gz' \
+
+echo 'Done!'

src/helmfile/library_scripts.sh

@@ -0,0 +1,171 @@
+
+
+clean_download() {
+    # The purpose of this function is to download a file with minimal impact on container layer size
+    # this means if no valid downloader is found (curl or wget) then we install a downloader (currently wget) in a
+    # temporary manner, and making sure to
+    # 1. uninstall the downloader at the return of the function
+    # 2. revert back any changes to the package installer database/cache (for example apt-get lists)
+    # The above steps will minimize the leftovers being created while installing the downloader
+    # Supported distros:
+    #  debian/ubuntu/alpine
+
+    url=$1
+    output_location=$2
+    tempdir=$(mktemp -d)
+    downloader_installed=""
+
+    _apt_get_install() {
+        tempdir=$1
+
+        # copy current state of apt list - in order to revert back later (minimize contianer layer size)
+        cp -p -R /var/lib/apt/lists $tempdir
+        apt-get update -y
+        apt-get -y install --no-install-recommends wget ca-certificates
+    }
+
+    _apt_get_cleanup() {
+        tempdir=$1
+
+        echo "removing wget"
+        apt-get -y purge wget --auto-remove
+
+        echo "revert back apt lists"
+        rm -rf /var/lib/apt/lists/*
+        rm -r /var/lib/apt/lists && mv $tempdir/lists /var/lib/apt/lists
+    }
+
+    _apk_install() {
+        tempdir=$1
+        # copy current state of apk cache - in order to revert back later (minimize contianer layer size)
+        cp -p -R /var/cache/apk $tempdir
+
+        apk add --no-cache  wget
+    }
+
+    _apk_cleanup() {
+        tempdir=$1
+
+        echo "removing wget"
+        apk del wget
+    }
+    # try to use either wget or curl if one of them already installer
+    if type curl >/dev/null 2>&1; then
+        downloader=curl
+    elif type wget >/dev/null 2>&1; then
+        downloader=wget
+    else
+        downloader=""
+    fi
+
+    # in case none of them is installed, install wget temporarly
+    if [ -z $downloader ] ; then
+        if [ -x "/usr/bin/apt-get" ] ; then
+            _apt_get_install $tempdir
+        elif [ -x "/sbin/apk" ] ; then
+            _apk_install $tempdir
+        else
+            echo "distro not supported"
+            exit 1
+        fi
+        downloader="wget"
+        downloader_installed="true"
+    fi
+
+    if [ $downloader = "wget" ] ; then
+        wget -q $url -O $output_location
+    else
+        curl -sfL $url -o $output_location
+    fi
+
+    # NOTE: the cleanup procedure was not implemented using `trap X RETURN` only because
+    # alpine lack bash, and RETURN is not a valid signal under sh shell
+    if ! [ -z $downloader_installed  ] ; then
+        if [ -x "/usr/bin/apt-get" ] ; then
+            _apt_get_cleanup $tempdir
+        elif [ -x "/sbin/apk" ] ; then
+            _apk_cleanup $tempdir
+        else
+            echo "distro not supported"
+            exit 1
+        fi
+    fi
+
+}
+
+
+ensure_nanolayer() {
+    # Ensure existance of the nanolayer cli program
+    local variable_name=$1
+
+    local required_version=$2
+
+    local __nanolayer_location=""
+
+    # If possible - try to use an already installed nanolayer
+    if [ -z "${NANOLAYER_FORCE_CLI_INSTALLATION}" ]; then
+        if [ -z "${NANOLAYER_CLI_LOCATION}" ]; then
+            if type nanolayer >/dev/null 2>&1; then
+                echo "Found a pre-existing nanolayer in PATH"
+                __nanolayer_location=nanolayer
+            fi
+        elif [ -f "${NANOLAYER_CLI_LOCATION}" ] && [ -x "${NANOLAYER_CLI_LOCATION}" ] ; then
+            __nanolayer_location=${NANOLAYER_CLI_LOCATION}
+            echo "Found a pre-existing nanolayer which were given in env variable: $__nanolayer_location"
+        fi
+
+        # make sure its of the required version
+        if ! [ -z "${__nanolayer_location}" ]; then
+            local current_version
+            current_version=$($__nanolayer_location --version)
+
+
+            if ! [ $current_version == $required_version ]; then
+                echo "skipping usage of pre-existing nanolayer. (required version $required_version does not match existing version $current_version)"
+                __nanolayer_location=""
+            fi
+        fi
+
+    fi
+
+    # If not previuse installation found, download it temporarly and delete at the end of the script
+    if [ -z "${__nanolayer_location}" ]; then
+
+        if [ "$(uname -sm)" = 'Linux x86_64' ] || [ "$(uname -sm)" = "Linux aarch64" ]; then
+            tmp_dir=$(mktemp -d -t nanolayer-XXXXXXXXXX)
+
+            clean_up () {
+                ARG=$?
+                rm -rf $tmp_dir
+                exit $ARG
+            }
+            trap clean_up EXIT
+
+
+            if [ -x "/sbin/apk" ] ; then
+                clib_type=musl
+            else
+                clib_type=gnu
+            fi
+
+            tar_filename=nanolayer-"$(uname -m)"-unknown-linux-$clib_type.tgz
+
+            # clean download will minimize leftover in case a downloaderlike wget or curl need to be installed
+            clean_download https://github.com/devcontainers-contrib/cli/releases/download/$required_version/$tar_filename $tmp_dir/$tar_filename
+
+            tar xfzv $tmp_dir/$tar_filename -C "$tmp_dir"
+            chmod a+x $tmp_dir/nanolayer
+            __nanolayer_location=$tmp_dir/nanolayer
+
+
+        else
+            echo "No binaries compiled for non-x86-linux architectures yet: $(uname -m)"
+            exit 1
+        fi
+    fi
+
+    # Expose outside the resolved location
+    export ${variable_name}=$__nanolayer_location
+
+}
+

src/sqlc/devcontainer-feature.json

@@ -1,7 +1,7 @@
 {
     "id": "sqlc",
     "name": "sqlc",
-    "version": "1.0.0",
+    "version": "1.0.1",
     "description": "Generate type-safe code from SQL",
     "documentationURL": "https://docs.sqlc.dev/en/stable",
     "options": {

test/helmfile/helmfile_version.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# This test file will be executed against an auto-generated devcontainer.json that
+# includes the 'sqlc' Feature with no options.
+#
+# For more information, see: https://github.com/devcontainers/cli/blob/main/docs/features/test.md
+#
+# Eg:
+# {
+#    "image": "<..some-base-image...>",
+#    "features": {
+#      "sqlc": {}
+#    },
+#    "remoteUser": "root"
+# }
+#
+# Thus, the value of all options will fall back to the default value in
+# the Feature's 'devcontainer-feature.json'.
+# For the 'sqlc' feature, that means the default favorite greeting is 'hey'.
+#
+# These scripts are run as 'root' by default. Although that can be changed
+# with the '--remote-user' flag.
+#
+# This test can be run with the following command:
+#
+#    devcontainer features test \
+#                   --features helmfile   \
+#                   --remote-user root \
+#                   --skip-scenarios   \
+#                   --base-image mcr.microsoft.com/devcontainers/base:ubuntu \
+#                   /path/to/this/repo
+
+set -e
+
+# Optional: Import test library bundled with the devcontainer CLI
+# See https://github.com/devcontainers/cli/blob/HEAD/docs/features/test.md#dev-container-features-test-lib
+# Provides the 'check' and 'reportResults' commands.
+source dev-container-features-test-lib
+
+# Feature-specific tests
+# The 'check' command comes from the dev-container-features-test-lib. Syntax is...
+# check <LABEL> <cmd> [args...]
+check "execute command" bash -c "helmfile version"
+
+# Report results
+# If any of the checks above exited with a non-zero exit code, the test will fail.
+reportResults

test/helmfile/scenarios.json

@@ -0,0 +1,10 @@
+{
+    "helmfile_version": {
+        "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
+        "features": {
+            "helmfile": {
+                "version": "v0.158.0"
+            }
+        }
+    }
+}

test/helmfile/test.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# This test file will be executed against an auto-generated devcontainer.json that
+# includes the 'hello' Feature with no options.
+#
+# For more information, see: https://github.com/devcontainers/cli/blob/main/docs/features/test.md
+#
+# Eg:
+# {
+#    "image": "<..some-base-image...>",
+#    "features": {
+#      "hello": {}
+#    },
+#    "remoteUser": "root"
+# }
+#
+# Thus, the value of all options will fall back to the default value in
+# the Feature's 'devcontainer-feature.json'.
+# For the 'hello' feature, that means the default favorite greeting is 'hey'.
+#
+# These scripts are run as 'root' by default. Although that can be changed
+# with the '--remote-user' flag.
+#
+# This test can be run with the following command:
+#
+#    devcontainer features test \
+#                   --features helmfile   \
+#                   --remote-user root \
+#                   --skip-scenarios   \
+#                   --base-image mcr.microsoft.com/devcontainers/base:ubuntu \
+#                   /path/to/this/repo
+
+set -e
+
+# Optional: Import test library bundled with the devcontainer CLI
+# See https://github.com/devcontainers/cli/blob/HEAD/docs/features/test.md#dev-container-features-test-lib
+# Provides the 'check' and 'reportResults' commands.
+source dev-container-features-test-lib
+
+# Feature-specific tests
+# The 'check' command comes from the dev-container-features-test-lib. Syntax is...
+# check <LABEL> <cmd> [args...]
+check "execute command" bash -c "helmfile version"
+
+# Report results
+# If any of the checks above exited with a non-zero exit code, the test will fail.
+reportResults