# Workflow inspired by:
#   - https://github.com/rstudio/shinycoreci/blob/master/.github/workflows/call-rituals.yaml
#   - https://github.com/r-lib/actions/blob/master/examples/lint.yaml
#   - https://github.com/r-lib/actions/blob/master/examples/render-rmarkdown.yaml

on:
  pull_request:
  push:
    branches: main

name: Package Maintenance

jobs:
  pkg-maintenance:
    runs-on: ubuntu-latest

    env:
      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
      # only add lintr annotations
      LINTR_COMMENT_BOT: false

    steps:
      - uses: actions/checkout@v2

        # Make sure the PR branch is checked out for pull requests
      - name: Git Pull (PR)
        if: github.event_name == 'pull_request'
        uses: r-lib/actions/pr-fetch@v1
        with:
          repo-token: ${{ github.token }}

      - name: Git Config
        run: |
          git config user.name "${GITHUB_ACTOR}"
          git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"

      - uses: r-lib/actions/setup-r@v1
        with:
          use-public-rspm: true

      - uses: r-lib/actions/setup-pandoc@v1

      - uses: r-lib/actions/setup-r-dependencies@v1
        with:
          extra-packages: |
            lintr
            styler
            devtools
            rmarkdown

      - name: Tidy Description
        run: |
          Rscript -e 'usethis::use_tidy_description()'
          git add -u && git commit -m 'Tidy DESCRIPTION (GitHub Actions)' || echo "No DESCRIPTION changes to commit"

      - name: Document
        run: |
          Rscript -e 'roxygen2::roxygenise()'
          git add man/\* NAMESPACE DESCRIPTION && git commit -m 'Document (GitHub Actions)' || echo "No documentation changes to commit"

      - name: Build README and index
        run: |
          if [ -f "index.Rmd" ]; then
            Rscript -e 'rmarkdown::render("index.Rmd", quiet = FALSE, output_options = list(html_preview = FALSE))'
            git add index.md man/figures/index* && git commit -m 'Re-build index.Rmd (GitHub Actions)' || echo "No index.Rmd changes to commit"
          else
            echo "No index.Rmd to build"
          fi
          if [ -f "README.Rmd" ]; then
            Rscript -e 'devtools::build_readme(quiet = FALSE)'
            git add man/figures/README* README.md && git commit -m 'Re-build README.Rmd (GitHub Actions)' || echo "No readme changes to commit"
          else
            echo "No README.Rmd to build"
          fi

      - name: URL redirects
        if: github.event_name == 'push'
        run: |
          Rscript -e 'pak::pkg_install("r-lib/urlchecker"); urlchecker::url_update()'
          git add -u && git commit -m 'Update links (GitHub Actions)' || echo "No link changes to commit"

      - name: Whitespace - Fix indents and trailing
        run: |
          # tabs to spaces and remove trailing whitespace
          transform_indent_two_spaces <- styler::create_style_guide(
            style_guide_name = "Indent with two spaces",
            style_guide_version = "1.0.0",
            indention = local({
              ts <- styler::tidyverse_style()$indention
              ts$unindent_fun_dec <- NULL
              ts$update_indention_ref_fun_dec <- NULL
              ts
            }),
            reindention = styler::specify_reindention(indention = 2, comments_only = FALSE)
          )

          styler::style_pkg(transformers = transform_indent_two_spaces)
        shell: Rscript {0}

      - name: Whitespace - Commit
        run: |
          git add -u && git commit -m 'Fix whitespace (GitHub Actions)' || echo 'No whitespace changes to commit'

        # When pushing to main causes package maintenance, create a pull request
      - name: Create Pull Request
        id: create-pull-request
        if: github.event_name == 'push'
        uses: peter-evans/create-pull-request@v3
        with:
          base: main
          branch: auto-pkg-maintenance
          commit-message: "Package maintenance (Github Actions)"
          title: "Automated package maintenance"
          body: >
            Automated package maintenance changes from
            <${{github.server_url}}/${{github.repository}}/actions/runs/${{github.run_id}}>

      - name: Notify Pull Request
        if: steps.create-pull-request.outputs.pull-request-operation
        run: |
          echo "::notice title=Package Maintenance:: Pull request #${{ steps.create-pull-request.outputs.pull-request-number }} ${{ steps.create-pull-request.outputs.pull-request-operation }}: ${{ steps.create-pull-request.outputs.pull-request-url }}"

        # If we're in a PR, then push back to the PR branch
      - name: Git Push (PR)
        uses: r-lib/actions/pr-push@v1
        if: github.event_name == 'pull_request'
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Lint Package
        if: github.event_name == 'pull_request'
        run: |
          # lint package and add notice-style file annotations
          Sys.setlocale(locale = "C")
          Sys.setenv(R_CLI_NUM_COLORS = 1)
          lints <- lintr::lint_package(cache = FALSE)
          informal_linters <- c(
            "closed_curly_linter",
            "commas_linter",
            "function_left_parentheses_linter",
            "line_length_linter",
            "object_length_linter",
            "object_name_linter",
            "open_curly_linter",
            "paren_brace_linter",
            "pipe_continuation_linter",
            "single_quotes_linter",
            "spaces_inside_linter",
            "spaces_left_parentheses_linter",
            "trailing_blank_lines_linter",
            "trailing_whitespace_linter"
          )
          for (lint in lints) {
            msg <- sprintf(
              "\n::%s file=%s,line=%d,col=%d,endColumn=%d,title=%s::%s",
              if (lint$linter %in% informal_linters) "notice" else "warning",
              lint$filename,
              lint$line_number,
              lint$ranges[[1]][[1]],
              lint$ranges[[1]][[2]],
              paste("lintr", lint$type, lint$linter, sep = " - "),
              # print lintr message as GHA-compatible multiline log message
              paste(capture.output(print(lint)), collapse = "%0A")
            )
            cat(msg)
          }
        shell: Rscript {0}