add version

.github/workflows/heph.yml

@@ -14,7 +14,20 @@ jobs:
         os: [linux, darwin]
         arch: [arm64, amd64]
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup tmate session
+        uses: mxschmitt/action-tmate@v3
+
+      - name: Compute version
+        id: version
+        run: |
+          VERSION=$(.github/workflows/version.sh)
+          echo "$VERSION"
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
 
       - name: Set up Go
         uses: actions/setup-go@v4
@@ -45,4 +58,6 @@ jobs:
           CGO_ENABLED: 0
           GOOS: ${{ matrix.os }}
           GOARCH: ${{ matrix.arch }}
-        run: go build -ldflags "-s -w" -o heph_${{ matrix.os }}_${{ matrix.arch }}
+          HEPH_VERSION: ${{steps.version.outputs.version}}
+        run: |
+          go build -ldflags "-s -w -X internal/hversion.Version=$HEPH_VERSION" -o heph_$HEPH_VERSION_${{ matrix.os }}_${{ matrix.arch }}

.github/workflows/version.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+set -e
+
+# Get the most recent tag
+latest_tag=$(git describe --tags --abbrev=0 2>/dev/null)
+
+if [ -z "$latest_tag" ]; then
+    echo "No tags found"
+    exit 1
+fi
+
+# Get the full description of current commit relative to last tag
+# --long ensures we always get the commit count and hash
+# --always returns hash even if no tags exist
+describe=$(git describe --tags --long --always)
+
+# If we're exactly on a tag, just output the tag
+if git describe --tags --exact-match 2>/dev/null >/dev/null; then
+    echo "$latest_tag"
+else
+    # Parse the describe output
+    # Format is like: 1.2.3-5-g36e65
+    # We want to transform it to: 1.2.3-build.5+g36e65
+
+    # Extract components using sed
+    version=$(echo "$describe" | sed -E 's/^(.*)-([0-9]+)-g([0-9a-f]+)$/\1/')
+    commits=$(echo "$describe" | sed -E 's/^(.*)-([0-9]+)-g([0-9a-f]+)$/\2/')
+    hash=$(echo "$describe" | sed -E 's/^(.*)-([0-9]+)-g([0-9a-f]+)$/\3/')
+
+    echo "$version-build.$commits+g$hash"
+fi

internal/cmd/root.go

@@ -9,6 +9,8 @@ import (
 	"runtime/pprof"
 	"sync"
 
+	"github.com/hephbuild/heph/internal/hversion"
+
 	"github.com/hephbuild/heph/internal/hcore/hlog"
 	"github.com/mattn/go-isatty"
 	"github.com/spf13/cobra"
@@ -35,6 +37,7 @@ var rootCmd = &cobra.Command{
 	TraverseChildren: true,
 	SilenceUsage:     true,
 	SilenceErrors:    true,
+	Version:          hversion.Version,
 	PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
 		if !debug {
 			levelVar.Set(slog.LevelInfo)

internal/hversion/version.go

@@ -0,0 +1,3 @@
+package hversion
+
+const Version = "dev"