fix: snapshot version handling

.travis.yml

@@ -17,7 +17,7 @@ install:
   - sudo snap install snapcraft --classic
 script:
   - make ci
-  - test -n "$TRAVIS_TAG" || go run main.go --snapshot
+  - test -n "$TRAVIS_TAG" || go run main.go --snapshot --debug
 after_success:
   - bash <(curl -s https://codecov.io/bash)
   - make static

internal/pipe/git/git.go

@@ -9,7 +9,6 @@ import (
 	"github.com/goreleaser/goreleaser/internal/deprecate"
 	"github.com/goreleaser/goreleaser/internal/git"
 	"github.com/goreleaser/goreleaser/internal/pipe"
-	"github.com/goreleaser/goreleaser/internal/tmpl"
 	"github.com/goreleaser/goreleaser/pkg/context"
 	"github.com/pkg/errors"
 )
@@ -35,9 +34,7 @@ func (Pipe) Run(ctx *context.Context) error {
 	}
 	ctx.Git = info
 	log.Infof("releasing %s, commit %s", info.CurrentTag, info.Commit)
-	if err := setVersion(ctx); err != nil {
-		return err
-	}
+	ctx.Version = strings.TrimPrefix(ctx.Git.CurrentTag, "v")
 	return validate(ctx)
 }
 
@@ -104,20 +101,6 @@ func getGitInfo(ctx *context.Context) (context.GitInfo, error) {
 	}, nil
 }
 
-func setVersion(ctx *context.Context) error {
-	if ctx.Snapshot {
-		snapshotName, err := tmpl.New(ctx).Apply(ctx.Config.Snapshot.NameTemplate)
-		if err != nil {
-			return errors.Wrap(err, "failed to generate snapshot name")
-		}
-		ctx.Version = snapshotName
-		return nil
-	}
-	// removes usual `v` prefix
-	ctx.Version = strings.TrimPrefix(ctx.Git.CurrentTag, "v")
-	return nil
-}
-
 func validate(ctx *context.Context) error {
 	if ctx.Snapshot {
 		return pipe.ErrSnapshotEnabled

internal/pipe/git/git_test.go

@@ -224,23 +224,6 @@ func TestSnapshotDirty(t *testing.T) {
 	testlib.AssertSkipped(t, Pipe{}.Run(ctx))
 }
 
-func TestShortCommitHash(t *testing.T) {
-	_, back := testlib.Mktmp(t)
-	defer back()
-	testlib.GitInit(t)
-	testlib.GitRemoteAdd(t, "git@github.com:foo/bar.git")
-	testlib.GitCommit(t, "first")
-	var ctx = context.New(config.Project{
-		Snapshot: config.Snapshot{
-			NameTemplate: "{{.Commit}}",
-		},
-	})
-	ctx.Snapshot = true
-	ctx.Config.Git.ShortHash = true
-	testlib.AssertSkipped(t, Pipe{}.Run(ctx))
-	assert.Len(t, ctx.Version, 7)
-}
-
 func TestGitNotInPath(t *testing.T) {
 	var path = os.Getenv("PATH")
 	defer func() {

internal/pipe/snapcraft/snapcraft.go

@@ -150,6 +150,8 @@ func create(ctx *context.Context, arch string, binaries []artifact.Artifact) err
 		metadata.Name = ctx.Config.Snapcraft.Name
 	}
 
+	log.Debugf("metadata: %+v", metadata)
+
 	for _, binary := range binaries {
 		log.WithField("path", binary.Path).
 			WithField("name", binary.Name).
@@ -168,6 +170,9 @@ func create(ctx *context.Context, arch string, binaries []artifact.Artifact) err
 		metadata.Apps[binary.Name] = appMetadata
 
 		destBinaryPath := filepath.Join(primeDir, filepath.Base(binary.Path))
+		log.WithField("src", binary.Path).
+			WithField("dst", destBinaryPath).
+			Debug("linking")
 		if err = os.Link(binary.Path, destBinaryPath); err != nil {
 			return errors.Wrap(err, "failed to link binary")
 		}

internal/pipe/snapshot/snapshot.go

@@ -1,7 +1,14 @@
 // Package snapshot provides the snapshoting functionality to goreleaser.
 package snapshot
 
-import "github.com/goreleaser/goreleaser/pkg/context"
+import (
+	"fmt"
+
+	"github.com/goreleaser/goreleaser/internal/pipe"
+	"github.com/goreleaser/goreleaser/internal/tmpl"
+	"github.com/goreleaser/goreleaser/pkg/context"
+	"github.com/pkg/errors"
+)
 
 // Pipe for checksums
 type Pipe struct{}
@@ -17,3 +24,18 @@ func (Pipe) Default(ctx *context.Context) error {
 	}
 	return nil
 }
+
+func (Pipe) Run(ctx *context.Context) error {
+	if !ctx.Snapshot {
+		return pipe.Skip("not a snapshot")
+	}
+	name, err := tmpl.New(ctx).Apply(ctx.Config.Snapshot.NameTemplate)
+	if err != nil {
+		return errors.Wrap(err, "failed to generate snapshot name")
+	}
+	if name == "" {
+		return fmt.Errorf("empty snapshot name")
+	}
+	ctx.Version = name
+	return nil
+}

internal/pipe/snapshot/snapshot_test.go

@@ -3,6 +3,7 @@ package snapshot
 import (
 	"testing"
 
+	"github.com/goreleaser/goreleaser/internal/testlib"
 	"github.com/goreleaser/goreleaser/pkg/config"
 	"github.com/goreleaser/goreleaser/pkg/context"
 	"github.com/stretchr/testify/assert"
@@ -32,3 +33,43 @@ func TestDefaultSet(t *testing.T) {
 	assert.NoError(t, Pipe{}.Default(ctx))
 	assert.Equal(t, "snap", ctx.Config.Snapshot.NameTemplate)
 }
+
+func TestSnapshotNameShortCommitHash(t *testing.T) {
+	var ctx = context.New(config.Project{
+		Snapshot: config.Snapshot{
+			NameTemplate: "{{.ShortCommit}}",
+		},
+	})
+	ctx.Snapshot = true
+	ctx.Config.Git.ShortHash = true
+	ctx.Git.CurrentTag = "v1.2.3"
+	ctx.Git.ShortCommit = "123"
+	assert.NoError(t, Pipe{}.Run(ctx))
+	assert.Equal(t, ctx.Version, "123")
+}
+
+func TestSnapshotInvalidNametemplate(t *testing.T) {
+	var ctx = context.New(config.Project{
+		Snapshot: config.Snapshot{
+			NameTemplate: "{{.ShortCommit}{{{sss}}}",
+		},
+	})
+	ctx.Snapshot = true
+	assert.EqualError(t, Pipe{}.Run(ctx), `failed to generate snapshot name: template: tmpl:1: unexpected "}" in operand`)
+}
+
+func TestSnapshotEmptyFinalName(t *testing.T) {
+	var ctx = context.New(config.Project{
+		Snapshot: config.Snapshot{
+			NameTemplate: "{{ .Commit }}",
+		},
+	})
+	ctx.Snapshot = true
+	ctx.Git.CurrentTag = "v1.2.3"
+	assert.EqualError(t, Pipe{}.Run(ctx), "empty snapshot name")
+}
+
+func TestNotASnapshot(t *testing.T) {
+	var ctx = context.New(config.Project{})
+	testlib.AssertSkipped(t, Pipe{}.Run(ctx))
+}

internal/pipeline/pipeline.go

@@ -19,6 +19,7 @@ import (
 	"github.com/goreleaser/goreleaser/internal/pipe/publish"
 	"github.com/goreleaser/goreleaser/internal/pipe/sign"
 	"github.com/goreleaser/goreleaser/internal/pipe/snapcraft"
+	"github.com/goreleaser/goreleaser/internal/pipe/snapshot"
 	"github.com/goreleaser/goreleaser/pkg/context"
 )
 
@@ -36,6 +37,7 @@ var Pipeline = []Piper{
 	before.Pipe{},          // run global hooks before build
 	git.Pipe{},             // get and validate git repo state
 	defaults.Pipe{},        // load default configs
+	snapshot.Pipe{},        // snapshot version handling
 	dist.Pipe{},            // ensure ./dist is clean
 	effectiveconfig.Pipe{}, // writes the actual config (with defaults et al set) to dist
 	changelog.Pipe{},       // builds the release changelog