internal/source: handle blitiri.com.ar import paths

The source for these import paths is served by the git-arr web
viewer, which doesn't yet handle tags. Until it does, serve
the source from master.

For golang/go#44607

Change-Id: I94047a887ea6f1038ae812864ad343876b74ff8e
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/303609
Trust: Jonathan Amsterdam <[email protected]>
Run-TryBot: Jonathan Amsterdam <[email protected]>
TryBot-Result: kokoro <[email protected]>
Reviewed-by: Jamal Carvalho <[email protected]>

Author: jba

internal/source/source.go

@@ -91,6 +91,7 @@ func (i *Info) FileURL(pathname string) string {
 		"repo":       i.repoURL,
 		"importPath": path.Join(strings.TrimPrefix(i.repoURL, "https://"), dir),
 		"commit":     i.commit,
+		"dir":        dir,
 		"file":       path.Join(i.moduleDir, pathname),
 		"base":       base,
 	})
@@ -107,6 +108,7 @@ func (i *Info) LineURL(pathname string, line int) string {
 		"importPath": path.Join(strings.TrimPrefix(i.repoURL, "https://"), dir),
 		"commit":     i.commit,
 		"file":       path.Join(i.moduleDir, pathname),
+		"dir":        dir,
 		"base":       base,
 		"line":       strconv.Itoa(line),
 	})
@@ -356,6 +358,10 @@ func matchStatic(moduleOrRepoPath string) (repo, relativeModulePath string, _ ur
 		if strings.HasPrefix(repo, apacheDomain) {
 			repo = strings.Replace(repo, apacheDomain, "github.com/apache/", 1)
 		}
+		// Special case: module paths are blitiri.com.ar/go/..., but repos are blitiri.com.ar/git/r/...
+		if strings.HasPrefix(repo, "blitiri.com.ar/") {
+			repo = strings.Replace(repo, "/go/", "/git/r/", 1)
+		}
 		relativeModulePath = strings.TrimPrefix(moduleOrRepoPath, matches[0])
 		relativeModulePath = strings.TrimPrefix(relativeModulePath, "/")
 		return repo, relativeModulePath, pat.templates, pat.transformCommit, nil
@@ -612,7 +618,6 @@ var patterns = []struct {
 		// URLs anyway. See gogs/gogs#6242.
 		templates: giteaURLTemplates,
 	},
-
 	{
 		pattern: `^(?P<repo>dmitri\.shuralyov\.com\/.+)$`,
 		templates: urlTemplates{
@@ -622,6 +627,15 @@ var patterns = []struct {
 			Line:      "https://gotools.org/{importPath}?rev={commit}#{base}-L{line}",
 		},
 	},
+	{
+		pattern: `^(?P<repo>blitiri\.com\.ar/go/.+)$`,
+		templates: urlTemplates{
+			Repo:      "{repo}",
+			Directory: "{repo}/b/master/t/{dir}",
+			File:      "{repo}/b/master/t/{dir}f={file}.html",
+			Line:      "{repo}/b/master/t/{dir}f={file}.html#line-{line}",
+		},
+	},
 
 	// Patterns that match the general go command pattern, where they must have
 	// a ".git" repo suffix in an import path. If matching a repo URL from a meta tag,

internal/source/source_test.go

@@ -399,6 +399,15 @@ func TestModuleInfo(t *testing.T) {
 			"https://git.zx2c4.com/wireguard-windows/tree/go.mod?h=v0.3.4#n1",
 			"https://git.zx2c4.com/wireguard-windows/plain/go.mod?h=v0.3.4",
 		},
+		{
+			"go-source templates match blitiri.com.ar",
+			"blitiri.com.ar/go/log", "v1.1.0", "go.mod",
+			"https://blitiri.com.ar/git/r/log",
+			"https://blitiri.com.ar/git/r/log/b/master/t",
+			"https://blitiri.com.ar/git/r/log/b/master/t/f=go.mod.html",
+			"https://blitiri.com.ar/git/r/log/b/master/t/f=go.mod.html#line-1",
+			"",
+		},
 	} {
 		t.Run(test.desc, func(t *testing.T) {
 			info, err := ModuleInfo(context.Background(), &Client{client}, test.modulePath, test.version)
@@ -945,6 +954,9 @@ func TestURLTemplates(t *testing.T) {
 	// Check that templates contain the right variables.
 
 	for _, p := range patterns {
+		if strings.Contains(p.pattern, "blitiri") {
+			continue
+		}
 		check := func(tmpl string, vars ...string) {
 			if tmpl == "" {
 				return