fix(vcs): Make URL replacements also work for the root repository

Signed-off-by: Sebastian Schuberth <sebastian@doubleopen.org>

Author: sschuberth

plugins/version-control-systems/git/src/funTest/kotlin/GitFunTest.kt

@@ -152,6 +152,17 @@ class GitFunTest : WordSpec({
             )
         }
 
+        "apply URL replacements" {
+            val pkg = Package.EMPTY.copy(
+                vcsProcessed = VcsInfo(VcsType.GIT, REPO_URL.replace("https://", "git://"), REPO_REV)
+            )
+
+            // Using GitHub with the deprecated "git://" protocol actually hangs instead of failing explicitly.
+            shouldCompleteWithin(10, TimeUnit.SECONDS) {
+                git.download(pkg, outputDir)
+            }
+        }
+
         "apply URL replacements recursively" {
             val url = "https://github.com/oss-review-toolkit/ort-test-data-git-submodules.git"
             val pkg = Package.EMPTY.copy(vcsProcessed = VcsInfo(VcsType.GIT, url, "git-protocol-submodule-urls"))

plugins/version-control-systems/git/src/main/kotlin/Git.kt

@@ -182,6 +182,12 @@ class Git(
                     gitInfoDir.resolve("sparse-checkout").writeText(globPatterns.joinToString("\n"))
                 }
 
+                REPOSITORY_URL_PREFIX_REPLACEMENTS.groupBy(
+                    { it.second }, { it.first }
+                ).forEach { (replacement, prefixes) ->
+                    git.repository.config.setStringList("url", replacement, "insteadOf", prefixes)
+                }
+
                 git.repository.config.save()
             }
         } catch (e: GitAPIException) {