Add github workflows

.github/workflows/build.yml

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+name: Build
+
+on:
+  push:
+    branches:
+      - "*"
+  pull_request:
+    branches:
+      - master
+    types: [closed, opened, synchronize, reopened]
+
+jobs:
+  modify:
+    runs-on: ubuntu-latest
+    name: Apply Git modifications if any are necessary
+    steps:
+      - name: Check out files
+        uses: actions/checkout@v2
+        with:
+          submodules: false
+          lfs: false
+
+      # Set up committer info and GPG key
+      - name: Import GPG key
+        if: github.event.pull_request.merged
+        id: import_gpg
+        uses: XLabsProject/ghaction-import-gpg@25d9d6ab99eb355c169c33c2306a72df85d9f516
+        with:
+          git-commit-gpgsign: true
+          git-committer-email: "${{ secrets.XLABS_CI_EMAIL }}"
+          git-committer-name: "${{ secrets.XLABS_CI_NAME }}"
+          git-push-gpgsign: false
+          git-tag-gpgsign: true
+          git-user-signingkey: true
+          gpg-private-key: ${{ secrets.XLABS_CI_GPG_PRIVATE_KEY }}
+          passphrase: ${{ secrets.XLABS_CI_GPG_PASSWORD }}
+
+      - name: Extract version from changelog
+        if: github.event.pull_request.merged
+        id: changelog_reader
+        uses: mindsers/changelog-reader-action@v2
+        with:
+          validation_depth: 10
+          path: ./CHANGELOG.md
+
+      - name: Create annotated tag
+        if: github.event.pull_request.merged
+        run: |
+          git tag -a -m "${{ steps.changelog_reader.outputs.changes }}" \
+            "${{ steps.changelog_reader.outputs.version }}" \
+            "${{ github.event.pull_request.merge_commit_sha }}"
+          git push origin --tags
+
+  build:
+    name: Build binaries
+    runs-on: windows-latest
+    needs:
+      - modify
+    strategy:
+      matrix:
+        configuration:
+          - Debug
+          - Release
+    steps:
+      - name: Check out files
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+          fetch-depth: 0
+          # NOTE - if LFS ever starts getting used during builds, switch this to true!
+          lfs: false
+
+      - name: Add msbuild to PATH
+        uses: microsoft/setup-msbuild@v1.0.2
+
+      - name: Generate project files
+        run: tools/premake5 vs2019
+
+      - name: Set up problem matching
+        uses: ammaraskar/msvc-problem-matcher@master
+
+      - name: Build ${{matrix.configuration}} binaries
+        run: msbuild /m /v:minimal /p:Configuration=${{matrix.configuration}} /p:Platform=x64 build/iw6x.sln
+
+      - name: Upload ${{matrix.configuration}} binaries
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{matrix.configuration}} binaries
+          path: |
+            build/bin/x64/${{matrix.configuration}}/*
+
+      - name: Upload ${{matrix.configuration}} debug symbols
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{matrix.configuration}} debug symbols
+          path: |
+            build/bin/**/*.pdb
+
+  release:
+    name: Create new GitHub Release
+    needs: build
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.merged
+    steps:
+      - name: Check out files
+        uses: actions/checkout@v2
+        with:
+          submodules: false
+          lfs: false
+
+      - name: Download Release binaries
+        uses: actions/download-artifact@v2
+        with:
+          name: Release binaries
+
+      # Set up committer info and GPG key
+      - name: Import GPG key
+        id: import_gpg
+        uses: XLabsProject/ghaction-import-gpg@25d9d6ab99eb355c169c33c2306a72df85d9f516
+        with:
+          git-commit-gpgsign: true
+          git-committer-email: "${{ secrets.XLABS_CI_EMAIL }}"
+          git-committer-name: "${{ secrets.XLABS_CI_NAME }}"
+          git-push-gpgsign: false
+          git-tag-gpgsign: true
+          git-user-signingkey: true
+          gpg-private-key: ${{ secrets.XLABS_CI_GPG_PRIVATE_KEY }}
+          passphrase: ${{ secrets.XLABS_CI_GPG_PASSWORD }}
+
+      - name: Extract version from changelog
+        id: changelog_reader
+        uses: mindsers/changelog-reader-action@v2
+        with:
+          validation_depth: 2
+          path: ./CHANGELOG.md
+
+      - uses: papeloto/action-zip@v1
+        with:
+          recursive: false
+          files: iw6x.exe
+          dest: iw6x-${{ steps.changelog_reader.outputs.version }}.zip
+      - name: Sign ZIP file
+        run: gpg --output "iw6x-${{ steps.changelog_reader.outputs.version }}.zip.sig" --detach-sig "iw6x-${{ steps.changelog_reader.outputs.version }}.zip"
+
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.XLABS_CI_GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ steps.changelog_reader.outputs.version }}
+          release_name: ${{ steps.changelog_reader.outputs.version }}
+          body: ${{ steps.changelog_reader.outputs.changes }}
+          draft: ${{ steps.changelog_reader.outputs.status == 'unreleased' }}
+          prerelease: ${{ steps.changelog_reader.outputs.status == 'prereleased' }}
+
+      - name: Upload Release ZIP
+        id: upload-release-zip
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.XLABS_CI_GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ${{ github.workspace }}/iw6x-${{ steps.changelog_reader.outputs.version }}.zip
+          asset_name: iw6x-${{ steps.changelog_reader.outputs.version }}.zip
+          asset_content_type: application/zip
+
+      - name: Upload Release ZIP signature
+        id: upload-release-zip-signature
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.XLABS_CI_GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ${{ github.workspace }}/iw6x-${{ steps.changelog_reader.outputs.version }}.zip.sig
+          asset_name: iw6x-${{ steps.changelog_reader.outputs.version }}.zip.sig
+          asset_content_type: text/plain
+
+      - name: Remove extra files
+        run: git clean -ffdx && git reset --hard
+
+      - name: Create Pull Request to merge master back into develop
+        uses: peter-evans/create-pull-request@v3
+        env:
+          GITHUB_TOKEN: ${{ secrets.XLABS_CI_GITHUB_TOKEN }}
+        with:
+          delete-branch: false
+          author: "${{ secrets.XLABS_CI_NAME }} <${{ secrets.XLABS_CI_EMAIL }}>"
+          committer: "${{ secrets.XLABS_CI_NAME }} <${{ secrets.XLABS_CI_EMAIL }}>"
+          branch: release/${{ steps.changelog_reader.outputs.version }}
+          base: develop
+          body: |
+            This Pull Request contains all changes done for the release of ${{ steps.changelog_reader.outputs.version }}, ready to be merged back into `master`.
+
+            This release should be merged in due time to make sure that changes done to files such as the changelog as part of the release are also contained on the `develop` branch.
+          title: Merge ${{ steps.changelog_reader.outputs.version }} into develop
+
+  notify:
+    name: Notify Discord
+    runs-on: ubuntu-latest
+    if: |
+      github.repository_owner == 'XLabsProject' && (
+        (
+          github.event.pull_request.merged
+        ) || (
+          github.event.push.ref == 'refs/heads/master' ||
+          github.event.push.ref == 'refs/heads/develop'
+        )
+      )
+    steps:
+      - name: Post CI status notification to Discord
+        uses: sarisia/actions-status-discord@v1.7.1
+        if: always()
+        with:
+          webhook: ${{ secrets.DISCORD_CI_BOT_WEBHOOK }}
+          title: "Build"

.github/workflows/discord-notify.yml

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+name: Notify Discord
+
+on:
+  push:
+    branches:
+      - "*"
+  issues:
+
+jobs:
+  notify:
+    runs-on: ubuntu-latest
+    if: github.repository_owner == 'XLabsProject'
+    steps:
+      - name: Send notification to Discord
+        uses: Ilshidur/action-discord@master
+        env:
+          DISCORD_WEBHOOK: ${{ secrets.DISCORD_CI_BOT_WEBHOOK }}

.github/workflows/draft-new-release.yml

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+name: "Draft new release"
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "The version you want to release."
+        required: true
+
+jobs:
+  draft-new-release:
+    name: "Draft a new release"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Normalize version
+        id: normalize_version
+        run: |
+          version="${{ github.event.inputs.version }}"
+          version="v${version#v}"
+          echo "::set-output name=version::$version"
+
+      # Set up committer info and GPG key
+      - name: Import GPG key
+        id: import_gpg
+        uses: XLabsProject/ghaction-import-gpg@25d9d6ab99eb355c169c33c2306a72df85d9f516
+        with:
+          git-commit-gpgsign: true
+          git-committer-email: "${{ secrets.XLABS_CI_EMAIL }}"
+          git-committer-name: "${{ secrets.XLABS_CI_NAME }}"
+          # git-push-gpgsign: true
+          git-tag-gpgsign: true
+          git-user-signingkey: true
+          gpg-private-key: ${{ secrets.XLABS_CI_GPG_PRIVATE_KEY }}
+          passphrase: ${{ secrets.XLABS_CI_GPG_PASSWORD }}
+
+      - name: Rename Unreleased section in changelog to ${{ steps.normalize_version.outputs.version }}
+        uses: thomaseizinger/keep-a-changelog-new-release@1.1.0
+        with:
+          version: ${{ steps.normalize_version.outputs.version }}
+
+      - name: Commit changelog
+        id: make-commit
+        run: |
+          git checkout -b "release/${{ steps.normalize_version.outputs.version }}"
+          git add CHANGELOG.md
+          git commit -S -m "Prepare release ${{ steps.normalize_version.outputs.version }}"
+          git push -u origin "release/${{ steps.normalize_version.outputs.version }}"
+
+          echo "::set-output name=commit::$(git rev-parse HEAD)"
+
+      - name: Extract changelog for Pull Request
+        id: changelog_reader
+        uses: mindsers/changelog-reader-action@v2
+        with:
+          validation_depth: 10
+          version: ${{ steps.normalize_version.outputs.version }}
+          path: ./CHANGELOG.md
+
+      - name: Create Pull Request
+        uses: repo-sync/pull-request@v2
+        with:
+          github_token: ${{ secrets.XLABS_CI_GITHUB_TOKEN }}
+          source_branch: "release/${{ steps.normalize_version.outputs.version }}"
+          destination_branch: "master"
+          pr_body: |
+            This Pull Request is for the release of IW6x ${{ steps.normalize_version.outputs.version }} and was [automatically created by a workflow](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}) triggered by @${{ github.actor }}.
+
+            Commit [`${{ steps.make-commit.outputs.commit }}`](https://github.com/${{ github.repository }}/commit/${{ steps.make-commit.outputs.commit }}) includes an update to the changelog to list the new version with its changes.
+
+            # What happens when this PR gets merged?
+
+            After merging this PR, another workflow will create a new tag `${{ steps.normalize_version.outputs.version }}` on the `master` branch and the version will officially be ${{ steps.changelog_reader.outputs.status }} via an actual GitHub release. A final build will be triggered and all binaries and assets will be attached to the GitHub release.
+
+            # Changelog for ${{ steps.normalize_version.outputs.version }}
+
+            These changes will be included in the release:
+
+            ${{ steps.changelog_reader.outputs.changes }}
+          pr_title: Release ${{ steps.changelog_reader.outputs.version }}
+          pr_label: release