Add a registry for GitHostingProviders (#11470)

This PR adds a registry for `GitHostingProvider`s.

The intent here is to help decouple these provider-specific concerns
from the lower-level `git` crate.

Similar to languages, the Git hosting providers live in the new
`git_hosting_providers` crate.

This work also lays the foundation for if we wanted to allow defining a
`GitHostingProvider` from within an extension. This could be useful if
we wanted to extend the support to work with self-hosted Git providers
(like GitHub Enterprise).

I also took the opportunity to move some of the provider-specific code
out of the `util` crate, since it had leaked into there.

Release Notes:

- N/A

crates/git_hosting_providers/src/providers/bitbucket.rs

@@ -0,0 +1,175 @@
+use url::Url;
+
+use git::{BuildCommitPermalinkParams, BuildPermalinkParams, GitHostingProvider, ParsedGitRemote};
+
+pub struct Bitbucket;
+
+impl GitHostingProvider for Bitbucket {
+    fn name(&self) -> String {
+        "Bitbucket".to_string()
+    }
+
+    fn base_url(&self) -> Url {
+        Url::parse("https://bitbucket.org").unwrap()
+    }
+
+    fn supports_avatars(&self) -> bool {
+        false
+    }
+
+    fn format_line_number(&self, line: u32) -> String {
+        format!("lines-{line}")
+    }
+
+    fn format_line_numbers(&self, start_line: u32, end_line: u32) -> String {
+        format!("lines-{start_line}:{end_line}")
+    }
+
+    fn parse_remote_url<'a>(&self, url: &'a str) -> Option<ParsedGitRemote<'a>> {
+        if url.contains("bitbucket.org") {
+            let (_, repo_with_owner) = url.trim_end_matches(".git").split_once("bitbucket.org")?;
+            let (owner, repo) = repo_with_owner
+                .trim_start_matches('/')
+                .trim_start_matches(':')
+                .split_once('/')?;
+
+            return Some(ParsedGitRemote { owner, repo });
+        }
+
+        None
+    }
+
+    fn build_commit_permalink(
+        &self,
+        remote: &ParsedGitRemote,
+        params: BuildCommitPermalinkParams,
+    ) -> Url {
+        let BuildCommitPermalinkParams { sha } = params;
+        let ParsedGitRemote { owner, repo } = remote;
+
+        self.base_url()
+            .join(&format!("{owner}/{repo}/commits/{sha}"))
+            .unwrap()
+    }
+
+    fn build_permalink(&self, remote: ParsedGitRemote, params: BuildPermalinkParams) -> Url {
+        let ParsedGitRemote { owner, repo } = remote;
+        let BuildPermalinkParams {
+            sha,
+            path,
+            selection,
+        } = params;
+
+        let mut permalink = self
+            .base_url()
+            .join(&format!("{owner}/{repo}/src/{sha}/{path}"))
+            .unwrap();
+        permalink.set_fragment(
+            selection
+                .map(|selection| self.line_fragment(&selection))
+                .as_deref(),
+        );
+        permalink
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use git::{parse_git_remote_url, GitHostingProviderRegistry};
+
+    use super::*;
+
+    #[test]
+    fn test_parse_git_remote_url_bitbucket_https_with_username() {
+        let provider_registry = Arc::new(GitHostingProviderRegistry::new());
+        provider_registry.register_hosting_provider(Arc::new(Bitbucket));
+        let url = "https://thorstenballzed@bitbucket.org/thorstenzed/testingrepo.git";
+        let (provider, parsed) = parse_git_remote_url(provider_registry, url).unwrap();
+        assert_eq!(provider.name(), "Bitbucket");
+        assert_eq!(parsed.owner, "thorstenzed");
+        assert_eq!(parsed.repo, "testingrepo");
+    }
+
+    #[test]
+    fn test_parse_git_remote_url_bitbucket_https_without_username() {
+        let provider_registry = Arc::new(GitHostingProviderRegistry::new());
+        provider_registry.register_hosting_provider(Arc::new(Bitbucket));
+        let url = "https://bitbucket.org/thorstenzed/testingrepo.git";
+        let (provider, parsed) = parse_git_remote_url(provider_registry, url).unwrap();
+        assert_eq!(provider.name(), "Bitbucket");
+        assert_eq!(parsed.owner, "thorstenzed");
+        assert_eq!(parsed.repo, "testingrepo");
+    }
+
+    #[test]
+    fn test_parse_git_remote_url_bitbucket_git() {
+        let provider_registry = Arc::new(GitHostingProviderRegistry::new());
+        provider_registry.register_hosting_provider(Arc::new(Bitbucket));
+        let url = "git@bitbucket.org:thorstenzed/testingrepo.git";
+        let (provider, parsed) = parse_git_remote_url(provider_registry, url).unwrap();
+        assert_eq!(provider.name(), "Bitbucket");
+        assert_eq!(parsed.owner, "thorstenzed");
+        assert_eq!(parsed.repo, "testingrepo");
+    }
+
+    #[test]
+    fn test_build_bitbucket_permalink_from_ssh_url() {
+        let remote = ParsedGitRemote {
+            owner: "thorstenzed",
+            repo: "testingrepo",
+        };
+        let permalink = Bitbucket.build_permalink(
+            remote,
+            BuildPermalinkParams {
+                sha: "f00b4r",
+                path: "main.rs",
+                selection: None,
+            },
+        );
+
+        let expected_url = "https://bitbucket.org/thorstenzed/testingrepo/src/f00b4r/main.rs";
+        assert_eq!(permalink.to_string(), expected_url.to_string())
+    }
+
+    #[test]
+    fn test_build_bitbucket_permalink_from_ssh_url_single_line_selection() {
+        let remote = ParsedGitRemote {
+            owner: "thorstenzed",
+            repo: "testingrepo",
+        };
+        let permalink = Bitbucket.build_permalink(
+            remote,
+            BuildPermalinkParams {
+                sha: "f00b4r",
+                path: "main.rs",
+                selection: Some(6..6),
+            },
+        );
+
+        let expected_url =
+            "https://bitbucket.org/thorstenzed/testingrepo/src/f00b4r/main.rs#lines-7";
+        assert_eq!(permalink.to_string(), expected_url.to_string())
+    }
+
+    #[test]
+    fn test_build_bitbucket_permalink_from_ssh_url_multi_line_selection() {
+        let remote = ParsedGitRemote {
+            owner: "thorstenzed",
+            repo: "testingrepo",
+        };
+        let permalink = Bitbucket.build_permalink(
+            remote,
+            BuildPermalinkParams {
+                sha: "f00b4r",
+                path: "main.rs",
+                selection: Some(23..47),
+            },
+        );
+
+        let expected_url =
+            "https://bitbucket.org/thorstenzed/testingrepo/src/f00b4r/main.rs#lines-24:48";
+        assert_eq!(permalink.to_string(), expected_url.to_string())
+    }
+}