docs: add warning about kaniko lacking maintainers

kaniko outputs each tag on a new line, so users that push multiple tags
at once would get an error as the output wasn't prepared to handle multi-line
text

.dockerignore

@@ -1,3 +1,3 @@
 *
 !entrypoint.sh
-
+.env*

.github/workflows/pr.yml

@@ -6,6 +6,8 @@ jobs:
     runs-on: ubuntu-latest
     name: Verify commit messages
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
       - name: Run commitsar
-        uses: docker://commitsar/commitsar
+        uses: docker://aevea/commitsar@sha256:e4aed72de9a00b990a53c678ad51fbe9bd04e127a617d10beab0ef0204b1dfa0

.github/workflows/push.yml

@@ -9,19 +9,19 @@ jobs:
       - uses: actions/checkout@master
 
       - name: GitHub Package Registry
-        uses: outillage/kaniko-action@master
+        uses: aevea/action-kaniko@master
         with:
-          registry: docker.pkg.github.com
+          registry: ghcr.io
           password: ${{ secrets.GITHUB_TOKEN }}
           image: kaniko
           cache: true
           cache_registry: cache
 
       - name: Dockerhub
-        uses: outillage/kaniko-action@master
+        uses: aevea/action-kaniko@master
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
-          image: outillage/kaniko
+          image: aevea/kaniko
           cache: true
-          cache_registry: outillage/cache
+          cache_registry: aevea/cache

.github/workflows/release.yml

@@ -10,27 +10,32 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Release Notary Action
-        uses: docker://commitsar/release-notary
+        uses: docker://aevea/release-notary@sha256:690915bf87458fd8eb1e1ff0be34b33377f920eda3f38b96c62ecbf897c831f4
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          entrypoint: release-notary
+          args: publish
 
       - name: GitHub Package Registry
-        uses: outillage/kaniko-action@master
+        uses: aevea/action-kaniko@master
         with:
-          registry: docker.pkg.github.com
+          registry: ghcr.io
           password: ${{ secrets.GITHUB_TOKEN }}
           image: kaniko
           cache: true
           cache_registry: cache
 
       - name: Dockerhub
-        uses: outillage/kaniko-action@master
+        uses: aevea/action-kaniko@master
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
-          image: outillage/kaniko
+          image: aevea/kaniko
           cache: true
-          cache_registry: outillage/cache
+          cache_registry: aevea/cache

Dockerfile

@@ -1,8 +1,26 @@
-FROM gcr.io/kaniko-project/executor:debug
+FROM alpine as certs
+
+RUN apk --update add ca-certificates
+
+FROM gcr.io/kaniko-project/executor:v1.23.2-debug
+
+SHELL ["/busybox/sh", "-c"]
+
+RUN wget -O /kaniko/jq \
+    https://github.com/jqlang/jq/releases/download/jq-1.7.1/jq-linux64 && \
+    chmod +x /kaniko/jq && \
+    wget -O /kaniko/reg \
+    https://github.com/genuinetools/reg/releases/download/v0.16.1/reg-linux-386 && \
+    chmod +x /kaniko/reg && \
+    wget -O /crane.tar.gz \
+    https://github.com/google/go-containerregistry/releases/download/v0.17.0/go-containerregistry_Linux_x86_64.tar.gz && \
+    tar -xvzf /crane.tar.gz crane -C /kaniko && \
+    rm /crane.tar.gz
 
 COPY entrypoint.sh /
+COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
 
 ENTRYPOINT ["/entrypoint.sh"]
 
-LABEL repository="https://github.com/outillage/action-kaniko" \
+LABEL repository="https://github.com/aevea/action-kaniko" \
     maintainer="Alex Viscreanu <alexviscreanu@gmail.com>"

Makefile

@@ -0,0 +1,24 @@
+build:
+	docker build -t aevea/kaniko .
+
+run: build
+	docker run \
+		-v $(shell pwd):/tmp \
+		-e GITHUB_REPOSITORY \
+		-e GITHUB_REF \
+		-e GITHUB_ACTOR \
+		-e GITHUB_TOKEN \
+		-e GITHUB_WORKSPACE="/tmp" \
+		-e INPUT_IMAGE \
+		-e INPUT_CACHE \
+		-e INPUT_CACHE_TTL \
+		-e INPUT_CACHE_REGISTRY \
+		-e INPUT_STRIP_TAG_PREFIX \
+		-e INPUT_SKIP_UNCHANGED_DIGEST \
+	aevea/kaniko
+
+shell: build
+	docker run \
+		-ti \
+		--entrypoint sh \
+	aevea/kaniko

README.md

@@ -1,5 +1,8 @@
 # Kaniko image builder
 
+> [!WARNING]  
+> The kaniko project no longer seems to [have maintainers](https://github.com/GoogleContainerTools/kaniko/issues/3348). Keep this in mind before deciding to use kaniko as your image builder.
+
 This Action uses the [kaniko](https://github.com/GoogleContainerTools/kaniko) executor instead of the docker daemon. Kaniko builds the image
 by extracting the filesystem of the base image, making the changes in the user space, snapshotting any change and appending it to the base
 image filesystem.
@@ -19,13 +22,13 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Kaniko build
-        uses: outillage/kaniko-action@master
+        uses: aevea/action-kaniko@master
         with:
-          image: outillage/kaniko
+          image: aevea/kaniko
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
           cache: true
-          cache_registry: outillage/cache
+          cache_registry: aevea/cache
 ```
 
 ## Required Arguments
@@ -33,24 +36,30 @@ jobs:
 This action aims to be as flexible as possible, so it tries to define the defaults as for what I thought of being
 the most used values. So, technically there is a single required argument
 
-| variable        | description                                              | required | default                     |
+| variable         | description                                              | required | default                     |
-|-----------------|----------------------------------------------------------|----------|-----------------------------|
+|------------------|----------------------------------------------------------|----------|-----------------------------|
-| image           | Name of the image you would like to push                 | true     |                             |
+| image            | Name of the image you would like to push                 | true     |                             |
 
 ## Optional Arguments
 
-| variable        | description                                              | required | default                     |
+| variable              | description                                                     | required | default         |
-|-----------------|----------------------------------------------------------|----------|-----------------------------|
+|-----------------------|-----------------------------------------------------------------|----------|-----------------|
-| registry        | Docker registry where the image will be pushed           | false    | docker.io                   |
+| registry              | Docker registry where the image will be pushed                  | false    | docker.io       |
-| username        | Username used for authentication to the Docker registry  | false    | $GITHUB_ACTOR               |
+| username              | Username used for authentication to the Docker registry         | false    | $GITHUB_ACTOR   |
-| password        | Password used for authentication to the Docker registry  | false    |                             |
+| password              | Password used for authentication to the Docker registry         | false    |                 |
-| tag             | Image tag                                                | false    | latest                      |
+| tag                   | Image tag                                                       | false    | latest          |
-| cache           | Enables build cache                                      | false    | false                       |
+| cache                 | Enables build cache                                             | false    | false           |
-| cache_ttl       | How long the cache should be considered valid            | false    |                             |
+| cache_ttl             | How long the cache should be considered valid                   | false    |                 |
-| cache_registry  | Docker registry meant to be used as cache                | false    |                             |
+| cache_registry        | Docker registry meant to be used as cache                       | false    |                 |
-| cache_directory | Filesystem path meant to be used as cache                | false    |                             |
+| cache_directory       | Filesystem path meant to be used as cache                       | false    |                 |
-| build_file      | Dockerfile filename                                      | false    | Dockerfile                  |
+| build_file            | Dockerfile filename                                             | false    | Dockerfile      |
-| extra_args      | Additional arguments to be passed to the kaniko executor | false    |                             |
+| extra_args            | Additional arguments to be passed to the kaniko executor        | false    |                 |
+| strip_tag_prefix      | Prefix to be stripped from the tag                              | false    |                 |
+| skip_unchanged_digest | Avoids pushing the image if the build generated the same digest | false    |                 |
+| path                  | Path to the build context. Defaults to `.`                      | false    | .               |
+| tag_with_latest       | Tags the built image with additional latest tag                 | false    |                 |
+| target                | Sets the target stage to build                                  | false    |                 |
+| debug                 | Enables trace for entrypoint.sh                                 | false    |                 |
 
 **Here is where it gets specific, as the optional arguments become required depending on the registry targeted**
 
@@ -61,7 +70,7 @@ In this case, the authentication credentials need to be passed via GitHub Action
 
 ```yaml
 with:
-  image: outillage/kaniko
+  image: aevea/kaniko
   username: ${{ secrets.DOCKERHUB_USERNAME }}
   password: ${{ secrets.DOCKERHUB_PASSWORD }}
 ```
@@ -71,24 +80,24 @@ doesn't work. If you want to use caching with Dockerhub, create a `cache` reposi
 
 ```yaml
 with:
-  image: outillage/kaniko
+  image: aevea/kaniko
   username: ${{ secrets.DOCKERHUB_USERNAME }}
   password: ${{ secrets.DOCKERHUB_PASSWORD }}
   cache: true
-  cache_registry: outillage/cache
+  cache_registry: aevea/cache
 ```
 
-### [docker.pkg.github.com](https://github.com/features/packages)
+### [ghcr.io](https://github.com/features/packages)
 
 GitHub's docker registry is a bit special. It doesn't allow top-level images, so this action will prefix any image with the GitHub namespace.
-If you want to push your image like `outillage/kaniko-action/kaniko`, you'll only need to pass `kaniko` to this action.
+If you want to push your image like `aevea/action-kaniko/kaniko`, you'll only need to pass `kaniko` to this action.
 
 The authentication is automatically done using the `GITHUB_ACTOR` and `GITHUB_TOKEN` provided from GitHub itself. But as `GITHUB_TOKEN` is not
 passed by default, it will have to be explicitly set up.
 
 ```yaml
 with:
-  registry: docker.pkg.github.com
+  registry: ghcr.io
   password: ${{ secrets.GITHUB_TOKEN }}
   image: kaniko
 ```
@@ -99,7 +108,7 @@ cache layers to that image instead
 
 ```yaml
 with:
-  registry: docker.pkg.github.com
+  registry: ghcr.io
   password: ${{ secrets.GITHUB_TOKEN }}
   image: kaniko
   cache: true
@@ -124,7 +133,7 @@ with:
   registry: registry.gitlab.com
   username: ${{ secrets.GL_REGISTRY_USERNAME }}
   password: ${{ secrets.GL_REGISTRY_PASSWORD }}
-  image: outillage/kaniko
+  image: aevea/kaniko
 ```
 
 > NOTE: As GitLab's registry does support namespacing, Kaniko can natively push cached layers to it, so only `cache: true` is necessary to be
@@ -135,7 +144,7 @@ with:
   registry: registry.gitlab.com
   username: ${{ secrets.GL_REGISTRY_USERNAME }}
   password: ${{ secrets.GL_REGISTRY_PASSWORD }}
-  image: outillage/kaniko
+  image: aevea/kaniko
   cache: true
 ```
 
@@ -154,3 +163,24 @@ If you would like to publish the image to other registries, these actions might
 
 The `tag` argument, **unless overridden**, is automatically guessed based on the branch name. If the branch is `master` then the tag will
 be `latest`, otherwise it will keep the branch name, but replacing any forward slash (/) with a hyphen (-).
+
+If the `v` prefix that it's usually added to the GitHub releases is not desired when pushed to dockerhub, the `strip_tag_prefix` allows to
+specify which part of the tag should be removed.
+
+Example:
+
+```yaml
+with:
+  registry: ghcr.io
+  password: ${{ secrets.GITHUB_TOKEN }}
+  image: kaniko
+  strip_tag_prefix: pre-
+```
+
+for the tag `pre-0.1` will push `kaniko:0.1`, as the `pre-` part will be stripped from the tag name.
+
+## Outputs
+
+### `image`
+
+Full reference to the built image with registry and tag.

action.yml

@@ -5,6 +5,10 @@ branding:
   icon: anchor
   color: orange
 inputs:
+  path:
+    description: Path to the build context
+    required: false
+    default: "."
   registry:
     description: "Docker registry where the image will be pushed"
     required: false
@@ -35,9 +39,27 @@ inputs:
   build_file:
     description: "Dockerfile filename"
     required: false
+  strip_tag_prefix:
+    description: "Prefix to be stripped from the tag"
+    required: false
   extra_args:
     description: "Additional arguments to be passed to the kaniko executor"
     required: false
+  skip_unchanged_digest:
+    description: "Avoids pushing the image if the build generated the same digest"
+    required: false
+  tag_with_latest:
+    description: "Tags the built image with additional latest tag"
+    required: false
+  target:
+    description: Sets the target stage to build
+    required: false
+  debug:
+    description: Enables trace for entrypoint.sh
+    required: false
+outputs:
+  image:
+    description: "Full reference to the built image with registry and tag"
 runs:
   using: "docker"
   image: "Dockerfile"

entrypoint.sh

@@ -1,52 +1,84 @@
 #!/busybox/sh
 set -e pipefail
+if [ "$INPUT_DEBUG" = "true" ]; then
+    set -o xtrace
+fi
 
-export REGISTRY=${INPUT_REGISTRY:-"docker.io"}
+export REGISTRY="${INPUT_REGISTRY:-"docker.io"}"
-export IMAGE=${INPUT_IMAGE}
+export IMAGE="$INPUT_IMAGE"
-export BRANCH=$(echo ${GITHUB_REF} | sed -E "s/refs\/(heads|tags)\///g" | sed -e "s/\//-/g")
+export BRANCH=$(echo "$GITHUB_REF" | sed -E "s/refs\/(heads|tags)\///g" | sed -e "s/\//-/g")
-export TAG=${INPUT_TAG:-$([ "$BRANCH" == "master" ] && echo latest || echo $BRANCH)}
+export TAG=${INPUT_TAG:-$([ "$BRANCH" = "master" ] && echo latest || echo "$BRANCH")}
-export TAG=${TAG:-"latest"}
+export TAG="${TAG:-"latest"}"
-export USERNAME=${INPUT_USERNAME:-$GITHUB_ACTOR}
+export TAG="${TAG#$INPUT_STRIP_TAG_PREFIX}"
-export PASSWORD=${INPUT_PASSWORD:-$GITHUB_TOKEN}
+export USERNAME="${INPUT_USERNAME:-$GITHUB_ACTOR}"
-export IMAGE=$IMAGE:$TAG
+export PASSWORD="${INPUT_PASSWORD:-$GITHUB_TOKEN}"
+export REPOSITORY="$IMAGE"
+export IMAGE="${IMAGE}:${TAG}"
+export CONTEXT_PATH="$INPUT_PATH"
 
-function sanitize() {
+if [ "$INPUT_TAG_WITH_LATEST" = "true" ]; then
+    export IMAGE_LATEST="${REPOSITORY}:latest"
+fi
+
+ensure() {
     if [ -z "${1}" ]; then
-        echo >&2 "Unable to find the ${2}. Did you set with.${2}?"
+        echo >&2 "Unable to find the ${2} variable. Did you set with.${2}?"
         exit 1
     fi
 }
 
-sanitize "${REGISTRY}" "registry"
+ensure "${REGISTRY}" "registry"
-sanitize "${USERNAME}" "username"
+ensure "${USERNAME}" "username"
-sanitize "${PASSWORD}" "password"
+ensure "${PASSWORD}" "password"
-sanitize "${IMAGE}" "image"
+ensure "${IMAGE}" "image"
-sanitize "${TAG}" "tag"
+ensure "${TAG}" "tag"
+ensure "${CONTEXT_PATH}" "path"
 
-if [ "$REGISTRY" == "docker.pkg.github.com" ]; then
+if [ "$REGISTRY" = "ghcr.io" ]; then
-    export IMAGE="$GITHUB_REPOSITORY/$IMAGE"
+    IMAGE_NAMESPACE="$(echo $GITHUB_REPOSITORY | tr '[:upper:]' '[:lower:]')"
+    # Set `/` separator, unless image is pre-fixed with dash or slash
+    [ -n "$REPOSITORY" ] && [[ ! "$REPOSITORY" =~ ^[-/] ]] && SEPARATOR="/"
+    export IMAGE="$IMAGE_NAMESPACE$SEPARATOR$IMAGE"
+    export REPOSITORY="$IMAGE_NAMESPACE$SEPARATOR$REPOSITORY"
 
-    if [ ! -z $INPUT_CACHE_REGISTRY ]; then
+    if [ -n "$IMAGE_LATEST" ]; then
-        export INPUT_CACHE_REGISTRY="$REGISTRY/$GITHUB_REPOSITORY/$INPUT_CACHE_REGISTRY"
+        export IMAGE_LATEST="${IMAGE_NAMESPACE}/${IMAGE_LATEST}"
+    fi
+
+    if [ -n "$INPUT_CACHE_REGISTRY" ]; then
+        export INPUT_CACHE_REGISTRY="${REGISTRY}/${IMAGE_NAMESPACE}/${INPUT_CACHE_REGISTRY}"
     fi
 fi
 
-if [ "$REGISTRY" == "docker.io" ]; then
+if [ "$REGISTRY" = "docker.io" ]; then
     export REGISTRY="index.${REGISTRY}/v1/"
 else
-    export IMAGE="$REGISTRY/$IMAGE"
+    export IMAGE="${REGISTRY}/${IMAGE}"
+
+    if [ -n "$IMAGE_LATEST" ]; then
+        export IMAGE_LATEST="${REGISTRY}/${IMAGE_LATEST}"
+    fi
 fi
 
-export CACHE=${INPUT_CACHE:+"--cache=true"}
+export CACHE="${INPUT_CACHE:+"--cache=true"}"
-export CACHE=$CACHE${INPUT_CACHE_TTL:+" --cache-ttl=$INPUT_CACHE_TTL"}
+export CACHE="$CACHE"${INPUT_CACHE_TTL:+" --cache-ttl=$INPUT_CACHE_TTL"}
-export CACHE=$CACHE${INPUT_CACHE_REGISTRY:+" --cache-repo=$INPUT_CACHE_REGISTRY"}
+export CACHE="$CACHE"${INPUT_CACHE_REGISTRY:+" --cache-repo=$INPUT_CACHE_REGISTRY"}
-export CACHE=$CACHE${INPUT_CACHE_DIRECTORY:+" --cache-dir=$INPUT_CACHE_DIRECTORY"}
+export CACHE="$CACHE"${INPUT_CACHE_DIRECTORY:+" --cache-dir=$INPUT_CACHE_DIRECTORY"}
-export CONTEXT="--context $GITHUB_WORKSPACE"
+export CONTEXT="--context $GITHUB_WORKSPACE/$CONTEXT_PATH"
-export DOCKERFILE="--dockerfile ${INPUT_BUILD_FILE:-Dockerfile}"
+export DOCKERFILE="--dockerfile $CONTEXT_PATH/${INPUT_BUILD_FILE:-Dockerfile}"
-export DESTINATION="--destination $IMAGE"
+export TARGET=${INPUT_TARGET:+"--target=$INPUT_TARGET"}
+export DIGEST="--digest-file /kaniko/digest --image-name-tag-with-digest-file=/kaniko/image-tag-digest"
 
-export ARGS="$CACHE $CONTEXT $DOCKERFILE $DESTINATION $INPUT_EXTRA_ARGS"
+if [ -n "$INPUT_SKIP_UNCHANGED_DIGEST" ]; then
-echo $ARGS
+    export DESTINATION="--no-push --tarPath image.tar --destination $IMAGE"
+else
+    export DESTINATION="--destination $IMAGE"
+    if [ -n "$IMAGE_LATEST" ]; then
+        export DESTINATION="$DESTINATION --destination $IMAGE_LATEST"
+    fi
+fi
+
+export ARGS="$CACHE $CONTEXT $DOCKERFILE $TARGET $DIGEST $DESTINATION $INPUT_EXTRA_ARGS"
 
 cat <<EOF >/kaniko/.docker/config.json
 {
@@ -59,4 +91,45 @@ cat <<EOF >/kaniko/.docker/config.json
 }
 EOF
 
-/kaniko/executor $ARGS
+# https://github.com/GoogleContainerTools/kaniko/issues/1803
+# https://github.com/GoogleContainerTools/kaniko/issues/1349
+export IFS=''
+# Removes a trailing new line
+ARGS=$(echo "${ARGS}" | sed 's/\n*$//')
+kaniko_cmd="/kaniko/executor ${ARGS} --reproducible --force"
+echo "Running kaniko command ${kaniko_cmd}"
+eval "${kaniko_cmd}"
+
+echo "image=$IMAGE" >> "$GITHUB_OUTPUT"
+echo "digest=$(cat /kaniko/digest)" >> "$GITHUB_OUTPUT"
+echo "image-tag-digest<<EOF" >>"$GITHUB_OUTPUT"
+echo "$(cat /kaniko/image-tag-digest)" >>"$GITHUB_OUTPUT"
+echo 'EOF' >>"$GITHUB_OUTPUT"
+
+
+if [ -n "$INPUT_SKIP_UNCHANGED_DIGEST" ]; then
+    export DIGEST="$(cat /kaniko/digest)"
+
+    /kaniko/crane auth login "$REGISTRY" -u "$USERNAME" -p "$PASSWORD"
+
+    export REMOTE=$(crane digest "${REGISTRY}/${REPOSITORY}:latest")
+
+    if [ "$DIGEST" = "$REMOTE" ]; then
+        echo "refreshed=false" >> "$GITHUB_OUTPUT"
+        echo "Digest hasn't changed, skipping, $DIGEST"
+        echo "Done 🎉️"
+        exit 0
+    fi
+
+    echo "Pushing image..."
+
+    /kaniko/crane push image.tar "$IMAGE"
+
+    if [ -n "$IMAGE_LATEST" ]; then
+        echo "Tagging latest..."
+        /kaniko/crane tag "$IMAGE" latest
+    fi
+
+    echo "refreshed=false" >> "$GITHUB_OUTPUT"
+    echo "Done 🎉️"
+fi

renovate.json

@@ -0,0 +1,5 @@
+{
+  "extends": [
+    "config:base"
+  ]
+}