git fetch: accept several remotes

The "--remote" option can be repeated, and the "git.fetch" key
is now a list.

CHANGELOG.md

@@ -74,9 +74,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   and `remote_needle` as optional arguments and matches just the branches whose
   name contains `branch_needle` and remote contains `remote_needle`.
 
+* `jj git fetch` accepts repeated `--remote` arguments.
+
 * Default remotes can be configured for the `jj git fetch` and `jj git push`
   operations ("origin" by default) using the `git.fetch` and `git.push`
-  configuration entries.
+  configuration entries. `git.fetch` can be a list if multiple remotes must
+  be fetched from.
 
 * `jj duplicate` can now duplicate multiple changes in one go. This preserves
   any parent-child relationships between them. For example, the entire tree of

src/commands/config-schema.json

@@ -180,6 +180,21 @@
                     "type": "boolean",
                     "description": "Whether jj creates a local branch with the same name when it imports a remote-tracking branch from git. See https://github.com/martinvonz/jj/blob/main/docs/config.md#automatic-local-branch-creation",
                     "default": true
+                },
+                "fetch": {
+                    "description": "The remote(s) from which commits are fetched",
+                    "default": "origin",
+                    "oneOf": [
+                        {
+                            "type": "string"
+                        },
+                        {
+                            "type": "array",
+                            "items": {
+                                "type": "string"
+                            }
+                        }
+                    ]
                 }
             }
         },

src/commands/git.rs

@@ -85,9 +85,10 @@ pub struct GitRemoteListArgs {}
 /// Fetch from a Git remote
 #[derive(clap::Args, Clone, Debug)]
 pub struct GitFetchArgs {
-    /// The remote to fetch from (only named remotes are supported)
-    #[arg(long)]
-    remote: Option<String>,
+    /// The remote to fetch from (only named remotes are supported, can be
+    /// repeated)
+    #[arg(long = "remote", value_name = "remote")]
+    remotes: Vec<String>,
 }
 
 /// Create a new repo backed by a clone of a Git repo
@@ -238,14 +239,22 @@ fn cmd_git_fetch(
     args: &GitFetchArgs,
 ) -> Result<(), CommandError> {
     let mut workspace_command = command.workspace_helper(ui)?;
-    let remote = if let Some(name) = &args.remote {
-        name.clone()
+    let remotes = if args.remotes.is_empty() {
+        const KEY: &str = "git.fetch";
+        let config = command.settings().config();
+        config
+            .get(KEY)
+            .or_else(|_| config.get_string(KEY).map(|r| vec![r]))?
     } else {
-        command.settings().config().get("git.fetch")?
+        args.remotes.clone()
     };
     let repo = workspace_command.repo();
     let git_repo = get_git_repo(repo.store())?;
-    let mut tx = workspace_command.start_transaction(&format!("fetch from git remote {}", &remote));
+    let mut tx = workspace_command.start_transaction(&format!(
+        "fetch from git remote(s) {}",
+        remotes.iter().join(",")
+    ));
+    for remote in remotes {
         with_remote_callbacks(ui, |cb| {
             git::fetch(
                 tx.mut_repo(),
@@ -256,6 +265,7 @@ fn cmd_git_fetch(
             )
         })
         .map_err(|err| user_error(err.to_string()))?;
+    }
     tx.finish(ui)?;
     Ok(())
 }

tests/test_git_fetch.rs

@@ -57,15 +57,53 @@ fn test_git_fetch_single_remote_from_config() {
     "###);
 }
 
+#[test]
+fn test_git_fetch_multiple_remotes() {
+    let test_env = TestEnvironment::default();
+    test_env.jj_cmd_success(test_env.env_root(), &["init", "repo", "--git"]);
+    let repo_path = test_env.env_root().join("repo");
+    add_git_remote(&test_env, &repo_path, "rem1");
+    add_git_remote(&test_env, &repo_path, "rem2");
+
+    test_env.jj_cmd_success(
+        &repo_path,
+        &["git", "fetch", "--remote", "rem1", "--remote", "rem2"],
+    );
+    insta::assert_snapshot!(get_branch_output(&test_env, &repo_path), @r###"
+    rem1: 9f01a0e04879 message
+    rem2: 9f01a0e04879 message
+    "###);
+}
+
+#[test]
+fn test_git_fetch_multiple_remotes_from_config() {
+    let test_env = TestEnvironment::default();
+    test_env.jj_cmd_success(test_env.env_root(), &["init", "repo", "--git"]);
+    let repo_path = test_env.env_root().join("repo");
+    add_git_remote(&test_env, &repo_path, "rem1");
+    add_git_remote(&test_env, &repo_path, "rem2");
+    test_env.add_config(r#"git.fetch = ["rem1", "rem2"]"#);
+
+    test_env.jj_cmd_success(&repo_path, &["git", "fetch"]);
+    insta::assert_snapshot!(get_branch_output(&test_env, &repo_path), @r###"
+    rem1: 9f01a0e04879 message
+    rem2: 9f01a0e04879 message
+    "###);
+}
+
 #[test]
 fn test_git_fetch_nonexistent_remote() {
     let test_env = TestEnvironment::default();
     test_env.jj_cmd_success(test_env.env_root(), &["init", "repo", "--git"]);
     let repo_path = test_env.env_root().join("repo");
+    add_git_remote(&test_env, &repo_path, "rem1");
 
-    let stderr = &test_env.jj_cmd_failure(&repo_path, &["git", "fetch", "--remote", "rem1"]);
+    let stderr = &test_env.jj_cmd_failure(
+        &repo_path,
+        &["git", "fetch", "--remote", "rem1", "--remote", "rem2"],
+    );
     insta::assert_snapshot!(stderr, @r###"
-    Error: No git remote named 'rem1'
+    Error: No git remote named 'rem2'
     "###);
     // No remote should have been fetched as part of the failing transaction
     insta::assert_snapshot!(get_branch_output(&test_env, &repo_path), @"");
@@ -76,11 +114,12 @@ fn test_git_fetch_nonexistent_remote_from_config() {
     let test_env = TestEnvironment::default();
     test_env.jj_cmd_success(test_env.env_root(), &["init", "repo", "--git"]);
     let repo_path = test_env.env_root().join("repo");
-    test_env.add_config(r#"git.fetch = "rem1""#);
+    add_git_remote(&test_env, &repo_path, "rem1");
+    test_env.add_config(r#"git.fetch = ["rem1", "rem2"]"#);
 
     let stderr = &test_env.jj_cmd_failure(&repo_path, &["git", "fetch"]);
     insta::assert_snapshot!(stderr, @r###"
-    Error: No git remote named 'rem1'
+    Error: No git remote named 'rem2'
     "###);
     // No remote should have been fetched as part of the failing transaction
     insta::assert_snapshot!(get_branch_output(&test_env, &repo_path), @"");