internal/task: remove initial tagging support

With the first run done this code is now dead. We can create manual tags
for future bootstrapping.

For golang/go#48523.

Change-Id: Iff147d095205f3e3687136d85eaaa08bae207069
Reviewed-on: https://go-review.googlesource.com/c/build/+/444117
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Run-TryBot: Heschi Kreinick <[email protected]>
Auto-Submit: Heschi Kreinick <[email protected]>

Author: heschi

Diff for: internal/task/tagx.go

@@ -79,19 +79,6 @@ func (x *TagXReposTasks) SelectRepos(ctx *wf.TaskContext) ([]TagRepo, error) {
 	return repos, nil
 }
 
-// TODO(heschi): delete after first use
-var initialTags = map[string]bool{
-	"arch":   true,
-	"crypto": true,
-	"image":  true,
-	"net":    true,
-	"oauth2": true,
-	"sync":   true,
-	"sys":    true,
-	"term":   true,
-	"time":   true,
-}
-
 func (x *TagXReposTasks) readRepo(ctx *wf.TaskContext, project string) (*TagRepo, error) {
 	head, err := x.Gerrit.ReadBranchHead(ctx, project, "master")
 	if errors.Is(err, gerrit.ErrResourceNotExist) {
@@ -106,9 +93,6 @@ func (x *TagXReposTasks) readRepo(ctx *wf.TaskContext, project string) (*TagRepo
 	if err != nil {
 		return nil, err
 	}
-	if tag == "" && initialTags[project] {
-		tag = "PLACEHOLDER"
-	}
 	if tag == "" {
 		ctx.Printf("ignoring %v: no semver tag", project)
 		return nil, nil
@@ -566,23 +550,19 @@ func (x *TagXReposTasks) MaybeTag(ctx *wf.TaskContext, repo TagRepo, commit stri
 	}
 
 	if highestRelease == "" {
-		if !initialTags[repo.Name] {
-			return TagRepo{}, fmt.Errorf("no semver tags found in %v", repo.Name)
-		}
-		repo.Version = "v0.1.0"
-	} else {
-		tagInfo, err := x.Gerrit.GetTag(ctx, repo.Name, highestRelease)
-		if err != nil && !initialTags[repo.Name] {
-			return TagRepo{}, fmt.Errorf("reading project %v tag %v: %v", repo.Name, highestRelease, err)
-		}
-		if tagInfo.Revision == commit {
-			repo.Version = highestRelease
-			return repo, nil
-		}
-		repo.Version, err = nextMinor(highestRelease)
-		if err != nil {
-			return TagRepo{}, fmt.Errorf("couldn't pick next version for %v: %v", repo.Name, err)
-		}
+		return TagRepo{}, fmt.Errorf("no semver tags found in %v", repo.Name)
+	}
+	tagInfo, err := x.Gerrit.GetTag(ctx, repo.Name, highestRelease)
+	if err != nil {
+		return TagRepo{}, fmt.Errorf("reading project %v tag %v: %v", repo.Name, highestRelease, err)
+	}
+	if tagInfo.Revision == commit {
+		repo.Version = highestRelease
+		return repo, nil
+	}
+	repo.Version, err = nextMinor(highestRelease)
+	if err != nil {
+		return TagRepo{}, fmt.Errorf("couldn't pick next version for %v: %v", repo.Name, err)
 	}
 
 	// TODO(heschi): delete after first couple uses