justfile

# See https://just.systems/man/en

lint: action-lint action-dev-check md-lint sh-lint rs-fetch rs-clippy rs-check-fmt go-lint

##
## Go
##

go-fetch:
    go mod download

go-fmt *flags:
    bin/fmt {{ flags }}

go-lint *flags:
    golangci-lint run {{ flags }}

go-test:
    LINKERD_TEST_PRETTY_DIFF=1 gotestsum -- -race -v -mod=readonly ./...

##
## Rust
##

# By default we compile in development mode mode because it's faster.
rs-build-type := if env_var_or_default("RELEASE", "") == "" { "debug" } else { "release" }

# Overriddes the default Rust toolchain version.
rs-toolchain := ""

rs-features := 'all'

_cargo := "cargo" + if rs-toolchain != "" { " +" + rs-toolchain } else { "" }

# Fetch Rust dependencies.
rs-fetch:
    {{ _cargo }} fetch --locked

# Format Rust code.
rs-fmt:
    {{ _cargo }} fmt --all

# Check that the Rust code is formatted correctly.
rs-check-fmt:
    {{ _cargo }} fmt --all -- --check

# Lint Rust code.
rs-clippy:
    {{ _cargo }} clippy --frozen --workspace --all-targets --no-deps {{ _features }} {{ _fmt }}

# Audit Rust dependencies.
rs-audit-deps:
    {{ _cargo }} deny {{ _features }} check

# Generate Rust documentation.
rs-doc *flags:
    {{ _cargo }} doc --frozen \
        {{ if rs-build-type == "release" { "--release" } else { "" } }} \
        {{ _features }} \
        {{ flags }}

rs-test-build:
    {{ _cargo-test }} --no-run --frozen \
        --workspace --exclude=linkerd-policy-test \
        {{ _features }} \
        {{ _fmt }}

# Run Rust unit tests
rs-test *flags:
    {{ _cargo-test }} --frozen \
        --workspace --exclude=linkerd-policy-test \
        {{ if rs-build-type == "release" { "--release" } else { "" } }} \
        {{ _features }} \
        {{ flags }}

# Check each crate independently to ensure its Cargo.toml is sufficient.
rs-check-dirs:
    #!/usr/bin/env bash
    set -euo pipefail
    while IFS= read -r toml ; do
        {{ just_executable() }} \
            rs-build-type='{{ rs-build-type }}' \
            rs-features='{{ rs-features }}' \
            rs-toolchain='{{ rs-toolchain }}' \
            _rs-check-dir "${toml%/*}"
        {{ just_executable() }} \
            rs-build-type='{{ rs-build-type }}' \
            rs-features='{{ rs-features }}' \
            rs-toolchain='{{ rs-toolchain }}' \
            _rs-check-dir "${toml%/*}" --tests
    done < <(find . -mindepth 2 -name Cargo.toml | sort -r)

_rs-check-dir dir *flags:
    cd {{ dir }} \
        && {{ _cargo }} check --frozen \
                {{ if rs-build-type == "release" { "--release" } else { "" } }} \
                {{ _features }} \
                {{ flags }} \
                {{ _fmt }}

# If we're running in github actions and cargo-action-fmt is installed, then add
# a command suffix that formats errors.
_fmt := if env_var_or_default("GITHUB_ACTIONS", "") != "true" { "" } else {
    ```
    if command -v cargo-action-fmt >/dev/null 2>&1; then
        echo "--message-format=json | cargo-action-fmt"
    fi
    ```
}

# Configures which features to enable when invoking cargo commands.
_features := if rs-features == "all" {
        "--all-features"
    } else if rs-features != "" {
        "--no-default-features --features=" + rs-features
    } else { "" }

# Use cargo-nextest if it is available. It may not be available when running
# outside of the devcontainer.
_cargo-test := _cargo + ```
    if command -v cargo-nextest >/dev/null 2>&1 ; then
        echo " nextest run"
    else
        echo " test"
    fi
    ```

##
## Policy integration tests
##

export POLICY_TEST_CONTEXT := "k3d-" + k3d-name

# Install linkerd in the test cluster and run the policy tests.
policy-test: linkerd-install policy-test-deps-load policy-test-run policy-test-cleanup linkerd-uninstall

# Run the policy tests without installing linkerd.
policy-test-run *flags:
    cd policy-test && {{ _cargo-test }} {{ flags }}

# Build the policy tests without running them.
policy-test-build:
    cd policy-test && {{ _cargo-test }} --no-run {{ _fmt }}

# Delete all test namespaces and remove linkerd from the cluster.
policy-test-cleanup:
    {{ _kubectl }} delete ns --selector='linkerd-policy-test'
    @-while [ $({{ _kubectl }} get ns --selector='linkerd-policy-test' -o json |jq '.items | length') != "0" ]; do sleep 1 ; done

policy-test-deps-pull:
    docker pull -q docker.io/bitnami/kubectl:latest
    docker pull -q docker.io/curlimages/curl:latest
    docker pull -q ghcr.io/olix0r/hokay:latest

# Load all images into the test cluster.
policy-test-deps-load: _k3d-init policy-test-deps-pull
    {{ _k3d-load }} \
        bitnami/kubectl:latest \
        curlimages/curl:latest \
        ghcr.io/olix0r/hokay:latest

##
## Test cluster
##

# The name of the k3d cluster to use.
k3d-name := "l5d-test"

# The kubernetes version to use for the test cluster. e.g. 'v1.24', 'latest', etc
k3d-k8s := "latest"

k3d-agents := "0"
k3d-servers := "1"

_context := "--context=k3d-" + k3d-name
_kubectl := "kubectl " + _context

_k3d-load := "k3d image import --mode=direct --cluster=" + k3d-name

# Run kubectl with the test cluster context.
k *flags:
    {{ _kubectl }} {{ flags }}

# Creates a k3d cluster that can be used for testing.
k3d-create: && _k3d-ready
    k3d cluster create {{ k3d-name }} \
        --image='+{{ k3d-k8s }}' \
        --agents='{{ k3d-agents }}' \
        --servers='{{ k3d-servers }}' \
        --no-lb \
        --k3s-arg '--disable=local-storage,traefik,servicelb,metrics-server@server:*' \
        --kubeconfig-update-default \
        --kubeconfig-switch-context=false

# Deletes the test cluster.
k3d-delete:
    k3d cluster delete {{ k3d-name }}

# Print information the test cluster's detailed status.
k3d-info:
    k3d cluster list {{ k3d-name }} -o json | jq .

# Set the default kubectl context to the test cluster.
k3d-use:
    k3d kubeconfig merge {{ k3d-name }} \
        --kubeconfig-merge-default \
        --kubeconfig-switch-context=true \
        >/dev/null

# Ensures the test cluster has been initialized.
_k3d-init: && _k3d-ready
    #!/usr/bin/env bash
    set -euo pipefail
    if ! k3d cluster list {{ k3d-name }} >/dev/null 2>/dev/null; then
        {{ just_executable() }} \
            k3d-name={{ k3d-name }} \
            k3d-k8s={{ k3d-k8s }} \
            k3d-create
    fi
    k3d kubeconfig merge {{ k3d-name }} \
        --kubeconfig-merge-default \
        --kubeconfig-switch-context=false \
        >/dev/null

_k3d-ready: _k3d-api-ready _k3d-dns-ready

# Wait for the cluster's API server to be accessible
_k3d-api-ready:
    #!/usr/bin/env bash
    set -euo pipefail
    for i in {1..6} ; do
        if {{ _kubectl }} cluster-info >/dev/null ; then exit 0 ; fi
        sleep 10
    done
    exit 1

# Wait for the cluster's DNS pods to be ready.
_k3d-dns-ready:
    while [ $({{ _kubectl }} get po -n kube-system -l k8s-app=kube-dns -o json |jq '.items | length') = "0" ]; do sleep 1 ; done
    {{ _kubectl }} wait pod --for=condition=ready \
        --namespace=kube-system --selector=k8s-app=kube-dns \
        --timeout=1m

##
## Docker images
##

# If DOCKER_REGISTRY is not already set, use a bogus registry with a unique
# name so that it's virtually impossible to accidentally use an incorrect image.
export DOCKER_REGISTRY := env_var_or_default("DOCKER_REGISTRY", "test.l5d.io/" + _test-id )
_test-id := `tr -dc 'a-z0-9' </dev/urandom | fold -w 5 | head -n 1`

# The docker image tag.
linkerd-tag := `bin/root-tag`

docker-arch := ''


##
## Linkerd CLI
##

# The Linkerd CLI binary.
linkerd-exec := "bin/linkerd"
_linkerd := linkerd-exec + " " + _context

# TODO(ver) we should pin the tag in the image (and split appropriately where
# we need to). so that it's possible to override a single image compltely. but
# doing this would mean that we need to invoke `yq` in some cases, and this
# dependency isn't universally available (e.g. in ci). if we change ci to use a
# devcontainer base image.

controller-image := DOCKER_REGISTRY + "/controller"
proxy-image := DOCKER_REGISTRY + "/proxy"
proxy-init-image := "ghcr.io/linkerd/proxy-init"
policy-controller-image := DOCKER_REGISTRY + "/policy-controller"

linkerd *flags:
    {{ _linkerd }} {{ flags }}

# Install crds on the test cluster.
linkerd-crds-install: _k3d-init
    {{ _linkerd }} install --crds \
        | {{ _kubectl }} apply -f -
    {{ _kubectl }} wait crd --for condition=established \
        --selector='linkerd.io/control-plane-ns' \
        --timeout=1m

# Install linkerd on the test cluster using test images.
linkerd-install *args='': linkerd-load linkerd-crds-install && _linkerd-ready
    {{ _linkerd }} install \
            --set='imagePullPolicy=Never' \
            --set='controllerImage={{ controller-image }}' \
            --set='linkerdVersion={{ linkerd-tag }}' \
            --set='policyController.image.name={{ policy-controller-image }}' \
            --set='policyController.image.version={{ linkerd-tag }}' \
            --set='policyController.loglevel=info\,linkerd=trace\,kubert=trace' \
            --set='proxy.image.name={{ proxy-image }}' \
            --set='proxy.image.version={{ linkerd-tag }}' \
            --set='proxyInit.image.name={{ proxy-init-image }}' \
            --set="proxyInit.image.version=$(yq .proxyInit.image.version charts/linkerd-control-plane/values.yaml)" \
            {{ args }} \
        | {{ _kubectl }} apply -f -

# Wait for all test namespaces to be removed before uninstalling linkerd from the cluster.
linkerd-uninstall: _linkerd-viz-uninit
    {{ _linkerd }} uninstall \
        | {{ _kubectl }} delete -f -

linkerd-load: _linkerd-images _k3d-init
    {{ _k3d-load }} \
        '{{ controller-image }}:{{ linkerd-tag }}' \
        '{{ policy-controller-image }}:{{ linkerd-tag }}' \
        '{{ proxy-image }}:{{ linkerd-tag }}' \
        "{{ proxy-init-image }}:$(yq .proxyInit.image.version charts/linkerd-control-plane/values.yaml)"

linkerd-build: _policy-controller-build
    docker pull -q "{{ proxy-init-image }}:$(yq .proxyInit.image.version charts/linkerd-control-plane/values.yaml)"
    TAG={{ linkerd-tag }} bin/docker-build-controller
    TAG={{ linkerd-tag }} bin/docker-build-proxy

_linkerd-images:
    #!/usr/bin/env bash
    set -xeuo pipefail
    docker pull -q "{{ proxy-init-image }}:$(yq .proxyInit.image.version charts/linkerd-control-plane/values.yaml)"
    for img in \
        '{{ controller-image }}:{{ linkerd-tag }}' \
        '{{ policy-controller-image }}:{{ linkerd-tag }}' \
        '{{ proxy-image }}:{{ linkerd-tag }}'
    do
        if [ -z $(docker image ls -q "$img") ]; then
            exec {{ just_executable() }} \
                controller-image='{{ controller-image }}' \
                policy-controller-image='{{ policy-controller-image }}' \
                proxy-image='{{ proxy-image }}' \
                proxy-init-image='{{ proxy-init-image }}' \
                linkerd-tag='{{ linkerd-tag }}' \
                linkerd-build
        fi
    done

# Build the policy controller docker image for testing (on amd64).
_policy-controller-build:
    docker buildx build . \
        --file='policy-controller/{{ if docker-arch == '' { "amd64" } else { docker-arch } }}.dockerfile' \
        --build-arg='build_type={{ rs-build-type }}' \
        --tag='{{ policy-controller-image }}:{{ linkerd-tag }}' \
        --progress=plain \
        --load

_linkerd-ready:
    {{ _kubectl }} wait pod --for=condition=ready \
        --namespace=linkerd --selector='linkerd.io/control-plane-component' \
        --timeout=1m

# Ensure that a linkerd control plane is installed
_linkerd-init: && _linkerd-ready
    #!/usr/bin/env bash
    set -euo pipefail
    if ! {{ _kubectl }} get ns linkerd >/dev/null 2>&1 ; then
        {{ just_executable() }} \
            k3d-name='{{ k3d-name }}' \
            k3d-k8s='{{ k3d-k8s }}' \
            k3d-agents='{{ k3d-agents }}' \
            k3d-servers='{{ k3d-servers }}' \
            linkerd-tag='{{ linkerd-tag }}' \
            controller-image='{{ controller-image }}' \
            proxy-image='{{ proxy-image }}' \
            proxy-init-image='{{ proxy-init-image }}' \
            linkerd-exec='{{ linkerd-exec }}' \
            linkerd-install
    fi

##
## linkerd viz
##

linkerd-viz *flags: _k3d-init
    {{ _linkerd }} viz {{ flags }}

linkerd-viz-install: _linkerd-init linkerd-viz-load && _linkerd-viz-ready
    {{ _linkerd }} viz install \
            --set='defaultRegistry={{ DOCKER_REGISTRY }}' \
            --set='linkerdVersion={{ linkerd-tag }}' \
            --set='defaultImagePullPolicy=Never' \
        | {{ _kubectl }} apply -f -

# Wait for all test namespaces to be removed before uninstalling linkerd from the cluster.
linkerd-viz-uninstall:
    {{ _linkerd }} viz uninstall \
        | {{ _kubectl }} delete -f -

_linkerd-viz-images:
    #!/usr/bin/env bash
    set -euo pipefail
    for img in \
        '{{ DOCKER_REGISTRY }}/metrics-api:{{ linkerd-tag }}' \
        '{{ DOCKER_REGISTRY }}/tap:{{ linkerd-tag }}' \
        '{{ DOCKER_REGISTRY }}/web:{{ linkerd-tag }}' \
        "$(yq '.prometheus.image | .registry + "/" + .name + ":" + .tag' \
            viz/charts/linkerd-viz/values.yaml)"
    do
        if [ -z $(docker image ls -q "$img") ]; then
            exec {{ just_executable() }} \
                linkerd-tag='{{ linkerd-tag }}' \
                linkerd-viz-build
        fi
    done

linkerd-viz-load: _linkerd-viz-images _k3d-init
    {{ _k3d-load }} \
        {{ DOCKER_REGISTRY }}/metrics-api:{{ linkerd-tag }} \
        {{ DOCKER_REGISTRY }}/tap:{{ linkerd-tag }} \
        {{ DOCKER_REGISTRY }}/web:{{ linkerd-tag }} \
        "$(yq '.prometheus.image | .registry + "/" + .name + ":" + .tag' \
                viz/charts/linkerd-viz/values.yaml)"

linkerd-viz-build:
    docker pull -q $(yq '.prometheus.image | .registry + "/" + .name + ":" + .tag' \
        viz/charts/linkerd-viz/values.yaml)
    TAG={{ linkerd-tag }} bin/docker-build-metrics-api
    TAG={{ linkerd-tag }} bin/docker-build-tap
    TAG={{ linkerd-tag }} bin/docker-build-web

_linkerd-viz-ready:
    {{ _kubectl }} wait pod --for=condition=ready \
        --namespace=linkerd-viz --selector='linkerd.io/extension=viz' \
        --timeout=1m

# Ensure that a linkerd control plane is installed
_linkerd-viz-uninit:
    #!/usr/bin/env bash
    set -euo pipefail
    if {{ _kubectl }} get ns linkerd-viz >/dev/null 2>&1 ; then
        {{ just_executable() }} \
            k3d-name='{{ k3d-name }}' \
            linkerd-exec='{{ linkerd-exec }}' \
            linkerd-viz-uninstall
    fi


# TODO linkerd-jaeger-install
# TODO linkerd-multicluster-install

##
## GitHub Actions
##

# Format actionlint output for Github Actions if running in CI.
_actionlint-fmt := if env_var_or_default("GITHUB_ACTIONS", "") != "true" { "" } else {
  '{{range $err := .}}::error file={{$err.Filepath}},line={{$err.Line}},col={{$err.Column}}::{{$err.Message}}%0A```%0A{{replace $err.Snippet "\\n" "%0A"}}%0A```\n{{end}}'
}

# Lints all GitHub Actions workflows
action-lint:
    actionlint {{ if _actionlint-fmt != '' { "-format '" + _actionlint-fmt + "'" } else { "" } }} .github/workflows/*

# Ensure all devcontainer versions are in sync
action-dev-check:
    action-dev-check

##
## Other tools...
##

md-lint:
    markdownlint-cli2 '**/*.md' '!**/node_modules' '!target'

sh-lint:
    bin/shellcheck-all

##
## Git
##

# Display the git history minus Dependabot updates
history *paths='.':
    @-git log --oneline --graph --invert-grep --author="dependabot" -- {{ paths }}

# Display the history of Dependabot changes
history-dependabot *paths='.':
    @-git log --oneline --graph --author="dependabot" -- {{ paths }}

# vim: set ft=make :