.github: Make all release tags follow v<semver> convention

Replace xemu-v*, gh-release/* tagging with typical semver vX.Y.Z, which
plays nicer with GitHub releases. Increments patch version on push
to master.

.github/workflows/build.yml

@@ -21,6 +21,26 @@ jobs:
       uses: actions/checkout@v2
       with:
         fetch-depth: 0
+    # On push to master, increment patch version and create a new tag on release
+    - name: Increment patch version
+      if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+      run: |
+        git config user.name "nobody"
+        git config user.email "nobody@nowhere"
+        VERSION=$(git describe --tags --match 'v*' --abbrev=0 | xargs ./scripts/increment-semver.py)
+        git tag -a $VERSION -m $VERSION
+        echo "Generated new release version: $VERSION"
+    # GitHub treats the new tag as lightweight, so older tags will shadow the
+    # new tag. Recreate it as an annotated tag now so the version script picks
+    # it up properly.
+    - name: Annotate release tag
+      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
+      run: |
+        git config user.name "nobody"
+        git config user.email "nobody@nowhere"
+        VERSION=${GITHUB_REF/refs\/tags\//}
+        git tag -a -f $VERSION $VERSION -m $VERSION
+        echo "Recreated release tag: $VERSION"
     - name: Create source package
       run: |
         ./scripts/archive-source.sh src.tar
@@ -280,7 +300,7 @@ jobs:
         path: xemu-macos-universal-${{ matrix.configuration }}.zip
 
   Release:
-    if: github.event_name == 'push' && (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/xemu-v'))
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/v'))
     runs-on: ubuntu-latest
     needs: [Ubuntu, macOSUniversal, Windows]
     steps:
@@ -293,21 +313,15 @@ jobs:
     - name: Get release info
       run: |
         echo "XEMU_VERSION=$(cat XEMU_VERSION)" >> $GITHUB_ENV
-        if [[ $GITHUB_REF == refs/tags/* ]]; then
-          echo "TAG_NAME=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
-        else
-          # GitHub requires a tag to make a release, but this is not a tagged
-          # update. Generate a new tag.
-          echo "TAG_NAME=gh-release/$(cat XEMU_VERSION)" >> $GITHUB_ENV
-        fi
     - name: Publish release
       uses: softprops/action-gh-release@v1
       with:
-        tag_name: ${{ env.TAG_NAME }}
+        tag_name: v${{ env.XEMU_VERSION }}
-        name: ${{ env.XEMU_VERSION }}
+        name: v${{ env.XEMU_VERSION }}
         prerelease: false
         draft: false
         files: |
+          dist/src.tar.gz/src.tar.gz
           dist/xemu-win-debug/xemu-win-debug.zip
           dist/xemu-win-release/xemu-win-release.zip
           dist/xemu-macos-universal-release/xemu-macos-universal-release.zip
@@ -319,7 +333,7 @@ jobs:
   # package creation.
   PushToPPA:
     name: Push to PPA Snapshot Branch
-    if: github.event_name == 'push' && (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/xemu-v'))
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/v'))
     needs: [Ubuntu, macOSUniversal, Windows]
     runs-on: ubuntu-latest
     steps:

scripts/archive-source.sh

@@ -76,7 +76,7 @@ done
 
 git rev-parse HEAD 2>/dev/null | tr -d '\n' > XEMU_COMMIT
 git symbolic-ref --short HEAD > XEMU_BRANCH
-git describe --tags --match 'xemu-v*' | cut -c 7- | tr -d '\n' > XEMU_VERSION
+git describe --tags --match 'v*' | cut -c 2- | tr -d '\n' > XEMU_VERSION
 tar -r --file "$tar_file" XEMU_COMMIT XEMU_BRANCH XEMU_VERSION
 
 exit 0

scripts/increment-semver.py

@@ -0,0 +1,10 @@
+#!/usr/bin/env python3
+import argparse, re
+ap = argparse.ArgumentParser()
+ap.add_argument('semver', help='Input semver X.Y.Z')
+args = ap.parse_args()
+m = re.match(r'(?P<pfx>[^\d]*)(?P<maj>\d+)\.(?P<min>\d+)\.(?P<pat>\d+)',
+             args.semver)
+assert m, 'Invalid version format'
+print(m.group('pfx') + '.'.join([m.group('maj'), m.group('min'),
+                                str(int(m.group('pat')) + 1)]))

scripts/xemu-version.sh

@@ -21,7 +21,7 @@ XEMU_BRANCH=$( \
 XEMU_VERSION=$( \
   cd "$dir"; \
   if test -e .git; then \
-    git describe --tags --match 'xemu-v*' | cut -c 7- | tr -d '\n'; \
+    git describe --tags --match 'v*' | cut -c 2- | tr -d '\n'; \
   elif test -e XEMU_VERSION; then \
     cat XEMU_VERSION; \
   fi)
@@ -36,15 +36,15 @@ get_version_dot () {
 
 XEMU_VERSION_MAJOR=$(get_version_dot 1)
 XEMU_VERSION_MINOR=$(get_version_dot 2)
-XEMU_VERSION_MICRO=$(get_version_dot 3)
+XEMU_VERSION_PATCH=$(get_version_dot 3)
-XEMU_VERSION_PATCH=$(get_version_field 2)
+XEMU_VERSION_COMMIT=$(get_version_field 2)
 
 cat <<EOF
 #define XEMU_VERSION       "$XEMU_VERSION"
 #define XEMU_VERSION_MAJOR $XEMU_VERSION_MAJOR
 #define XEMU_VERSION_MINOR $XEMU_VERSION_MINOR
-#define XEMU_VERSION_MICRO $XEMU_VERSION_MICRO
 #define XEMU_VERSION_PATCH $XEMU_VERSION_PATCH
+#define XEMU_VERSION_COMMIT $XEMU_VERSION_COMMIT
 #define XEMU_BRANCH        "$XEMU_BRANCH"
 #define XEMU_COMMIT        "$XEMU_COMMIT"
 #define XEMU_DATE          "$XEMU_DATE"

version.rc

@@ -3,8 +3,8 @@
 #include "xemu-version-macro.h"
 
 VS_VERSION_INFO VERSIONINFO
-FILEVERSION XEMU_VERSION_MAJOR,XEMU_VERSION_MINOR,XEMU_VERSION_MICRO,XEMU_VERSION_PATCH
+FILEVERSION XEMU_VERSION_MAJOR,XEMU_VERSION_MINOR,XEMU_VERSION_PATCH,XEMU_VERSION_COMMIT
-PRODUCTVERSION XEMU_VERSION_MAJOR,XEMU_VERSION_MINOR,XEMU_VERSION_MICRO,XEMU_VERSION_PATCH
+PRODUCTVERSION XEMU_VERSION_MAJOR,XEMU_VERSION_MINOR,XEMU_VERSION_PATCH,XEMU_VERSION_COMMIT
 FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
 FILEOS VOS_NT_WINDOWS32
 FILETYPE VFT_APP