add suggestion to use cache action if no depot is detected (#41)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 4 to 5.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/CODEOWNERS

@@ -0,0 +1 @@
+*       @julia-actions/reviewers

.github/dependabot.yml

@@ -0,0 +1,12 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  # Keep dependencies for GitHub Actions up-to-date
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    schedule:
+      interval: 'daily'

.github/workflows/backup.yml

@@ -0,0 +1,33 @@
+name: Backup
+
+on:
+  schedule:
+    - cron: '5 4 * * 0'
+
+  workflow_dispatch:
+
+jobs:
+  backup:
+    runs-on: ubuntu-20.04
+
+    steps:
+      - name: Configure cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ${{ env.GITHUB_WORKSPACE }}
+            ~/.cache/restic
+          key: ${{ runner.os }}
+
+      - name: Install the correct Python version
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+
+      - name: Run backup action
+        uses: julia-actions/restic-action@main
+        env: # Options: https://restic.readthedocs.io/en/latest/040_backup.html#environment-variables
+          RESTIC_REPOSITORY: b2:${{ secrets.B2_BUCKET }}:${{ github.repository }}
+          RESTIC_PASSWORD: ${{ secrets.RESTIC_PASSWORD }}
+          B2_ACCOUNT_ID: ${{ secrets.B2_ACCOUNT_ID }}
+          B2_ACCOUNT_KEY: ${{ secrets.B2_ACCOUNT_KEY }}

.github/workflows/ci.yml

@@ -0,0 +1,77 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - "main"
+      - "master"
+    paths-ignore:
+      - "README.md"
+      - "LICENSE"
+  pull_request:
+    paths-ignore:
+      - "README.md"
+      - "LICENSE"
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        version:
+          - "1.0"
+          - "1" # automatically expands to the latest stable 1.x release of Julia
+          - nightly
+        os:
+          - ubuntu-latest
+          - macOS-latest
+          - windows-latest
+        arch:
+          - x64
+          - x86
+        pkg-server:
+          - ""
+          - "pkg.julialang.org"
+        # 32-bit Julia binaries are not available on macOS
+        exclude:
+          - os: macOS-latest
+            arch: x86
+
+    steps:
+      - name: Checkout Example.jl
+        uses: actions/checkout@v4
+        with:
+          repository: julia-actions/Example.jl
+
+      - name: Verify that test output file does not exist yet
+        run: test ! -f "$HOME/julia-buildpkg"
+        shell: bash
+
+      - name: Checkout julia-buildpkg
+        uses: actions/checkout@v4
+        with:
+          path: ./.github/actions/julia-buildpkg
+
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: ${{ matrix.version }}
+          arch: ${{ matrix.arch }}
+
+      - uses: ./.github/actions/julia-buildpkg
+        with:
+          ignore-no-cache: true
+        env:
+          JULIA_PKG_SERVER: ${{ matrix.pkg-server }}
+
+      - uses: julia-actions/julia-runtest@v1
+
+      - uses: julia-actions/julia-processcoverage@v1
+
+      - uses: codecov/codecov-action@v3
+        with:
+          file: lcov.info
+
+      - name: Verify that test output file exists
+        run: test -f "$HOME/julia-buildpkg"
+        shell: bash

README.md

@@ -26,10 +26,46 @@ jobs:
             julia-arch: x86
 
     steps:
-      - uses: actions/checkout@v1.0.0
-      - uses: julia-actions/setup-julia@latest
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.julia-version }}
-      - uses: julia-actions/julia-buildpkg@master
-      - uses: julia-actions/julia-runtest@master
+      - uses: julia-actions/julia-buildpkg@v1
+      - uses: julia-actions/julia-runtest@v1
 ```
+
+
+### Registry flavor preference
+
+This actions defines (and exports for subsequent steps of the workflow) the
+environmental variable `JULIA_PKG_SERVER_REGISTRY_PREFERENCE=eager` unless it
+is already set. If you want another registry flavor (i.e. `conservative`) this
+should be defined in the `env:` section of the relevant workflow or step. See
+[Registry flavors](https://pkgdocs.julialang.org/dev/registries/#Registry-flavors)
+for more information.
+
+### Adding Local Registries
+
+Personal registries, e.g. created with [LocalRegistry.jl](https://github.com/GunnarFarneback/LocalRegistry.jl), can be added to the CI using the `localregistry` input option. If the personal registry as well as packages needed in the current project are public, no additional setup is required if the registry url is specified in https-format.
+
+If the registry contains private packages, or is itself private, the ssh protocol should to be used. The user has to provide the corresponding private SSH-keys to the `ssh-agent` to access packages and registry. This can be conveniently done using the [webfactory/ssh-agent](https://github.com/webfactory/ssh-agent) action. A snippet illustrating the usage of (private) personal registries is shown below
+
+```yaml
+...   
+      # Adding private SSH keys (only necessary for accessing private packages and/or 
+      # when providing Registry-link in ssh format)
+      - uses: webfactory/ssh-agent@v0.8.0
+        with:
+          ssh-private-key: |
+            ${{ secrets.PRIVATE_DEPLOY_KEY }}
+            ${{ secrets.PRIVATE_DEPLOY_KEY2 }}
+      - uses: julia-actions/julia-buildpkg@v1
+        with:
+          localregistry: |
+            https://github.com/username/PersonalRegistry.git
+            git@github.com:username2/PersonalRegistry2.git
+          git_cli: false # = JULIA_PKG_USE_CLI_GIT. Options: true | false (default)
+...
+```
+
+For Julia 1.7 and above, the `git_cli` option can be used to set the `JULIA_PKG_USE_CLI_GIT` [environment flag](https://docs.julialang.org/en/v1/manual/environment-variables/), for additional control of the SSH configuration used by `Pkg` to add/dev packages.

action.yml

@@ -6,8 +6,60 @@ branding:
   icon: 'box'
   color: 'gray-dark'
 
+inputs:
+  project:
+    description: 'Value passed to the --project flag. The default value is the repository root: "@."'
+    default: '@.'
+  precompile:
+    description: 'Whether to allow auto-precompilation (via the `JULIA_PKG_PRECOMPILE_AUTO` env var). Options: yes | no. Default value: no.'
+    default: 'no'
+  localregistry:
+    description: 'Add local registries hosted on GitHub. Specified by providing the url (https/ssh) to the repositories as a newline (\n) seperated list.
+                  User is responsible for setting up the necessary SSH-Keys to access the repositories if necessary.'
+    default: ''
+  git_cli:
+    description: 'Determine if Pkg uses the cli git executable (Julia >= 1.7). Might be necessary for more complicated SSH setups.
+                  Options: true | false. Default : false'
+    default: 'false'
+  ignore-no-cache:
+    description: 'Whether to ignore if there appears to be no depot caching. Silences an action notice recommending `julia-actions/cache`.'
+    default: 'false'
+
 runs:
   using: 'composite'
   steps:
-  - run: julia --color=yes --project -e 'using Pkg; if VERSION >= v"1.1.0-rc1"; Pkg.build(verbose=true); else Pkg.build(); end'
+  - name: Set and export registry flavor preference
+    run: echo "JULIA_PKG_SERVER_REGISTRY_PREFERENCE=${JULIA_PKG_SERVER_REGISTRY_PREFERENCE:-eager}" >> ${GITHUB_ENV}
     shell: bash
+  - run: |
+      if "${{ inputs.ignore-no-cache }}" == "false" && !isdir(DEPOT_PATH[1])
+          println("::notice title=[julia-buildpkg] Caching of the julia depot was not detected ::Consider using `julia-actions/cache` to speed up runs https://github.com/julia-actions/cache. To ignore, set input `ignore-no-cache: true` ")
+      end
+      import Pkg
+
+      # Determine if Pkg uses git-cli executable instead of LibGit2
+      VERSION >= v"1.7-" && (ENV["JULIA_PKG_USE_CLI_GIT"] = ${{ inputs.git_cli }})
+
+      if VERSION < v"1.7-" && ${{ inputs.git_cli }} == true
+        printstyled("::notice::JULIA_PKG_USE_CLI_GIT requires Julia >= 1.7. Using default LibGit2 git-interface instead! \n"; color = :yellow)
+      end
+
+
+      if VERSION >= v"1.5-"
+          Pkg.Registry.add("General")
+
+          # If provided add local registries
+          if !isempty("${{ inputs.localregistry }}")
+            local_repos = split("${{ inputs.localregistry }}", "\n") .|> string
+            for repo_url in local_repos
+              isempty(repo_url) && continue
+              Pkg.Registry.add(Pkg.RegistrySpec(; url = repo_url))
+            end
+          end
+      end
+
+      VERSION >= v"1.1.0-rc1" ? retry(Pkg.build)(verbose=true) : retry(Pkg.build)()
+    shell: julia --color=yes --project=${{ inputs.project }} {0}
+    env:
+      JULIA_PKG_PRECOMPILE_AUTO: "${{ inputs.precompile }}"
+      GITHUB_TOKEN: ${{ github.token }}