neiam /gitgud

Git Gud

public · Issues · Pulls · Labels · Forks · Compare · Actions success · Packages

Open pull requests between any two repos sharing lineage

8753207 · Gabriel Morell · 2026-09-09 20:51

13 files +538 -83

Message

{commit_body(@commit)}

Files changed

modified lib/git_gud/git.ex

+8 −0

@@ -68,6 +68,14 @@ defmodule GitGud.Git do

68	68	@spec log(repo_path(), sha(), keyword()) :: {:ok, [commit()]} \| {:error, term()}
69	69	def log(path, start_sha, opts \\ []), do: dispatch(:log, [path, start_sha, opts])
70	70
	71	+ @doc """
	72	+ Every parentless commit reachable from any ref — a repo's lineage
	73	+ fingerprint. Two repos that share one are forks of each other, however
	74	+ the copy was made and whether or not we recorded a link.
	75	+ """
	76	+ @spec root_commits(repo_path()) :: {:ok, [sha()]} \| {:error, term()}
	77	+ def root_commits(path), do: dispatch(:root_commits, [path])
	78	+
71	79	@doc "Load a single commit by SHA."
72	80	@spec commit(repo_path(), sha()) :: {:ok, commit()} \| {:error, term()}
73	81	def commit(path, sha), do: dispatch(:commit, [path, sha])

modified lib/git_gud/git/backend.ex

+1 −0

@@ -13,6 +13,7 @@ defmodule GitGud.Git.Backend do

13	13	@callback log(Git.repo_path(), Git.sha(), keyword()) ::
14	14	{:ok, [Git.commit()]} \| {:error, term()}
15	15	@callback commit(Git.repo_path(), Git.sha()) :: {:ok, Git.commit()} \| {:error, term()}
	16	+ @callback root_commits(Git.repo_path()) :: {:ok, [Git.sha()]} \| {:error, term()}
16	17	@callback tree(Git.repo_path(), Git.sha()) :: {:ok, [Git.tree_entry()]} \| {:error, term()}
17	18	@callback blob_bytes(Git.repo_path(), Git.sha()) :: {:ok, binary()} \| {:error, term()}
18	19	@callback blob_meta(Git.repo_path(), Git.sha()) :: {:ok, Git.blob_meta()} \| {:error, term()}

modified lib/git_gud/git/cli.ex

+24 −0

@@ -98,6 +98,30 @@ defmodule GitGud.Git.Cli do

98	98	end
99	99	end
100	100
	101	+ @impl true
	102	+ def root_commits(path) do
	103	+ case git(path, ["rev-list", "--max-parents=0", "--all"]) do
	104	+ {:ok, out} ->
	105	+ shas =
	106	+ out
	107	+ \|> String.split("\n", trim: true)
	108	+ \|> Enum.map(&String.trim/1)
	109	+ \|> Enum.flat_map(fn hex ->
	110	+ case Git.from_hex(hex) do
	111	+ {:ok, sha} -> [sha]
	112	+ _ -> []
	113	+ end
	114	+ end)
	115	+
	116	+ {:ok, Enum.uniq(shas)}
	117	+
	118	+ # An empty repo has no refs at all; `rev-list --all` fails rather
	119	+ # than returning nothing.
	120	+ {:error, _} ->
	121	+ {:ok, []}
	122	+ end
	123	+ end
	124	+
101	125	@impl true
102	126	def commit(path, sha) do
103	127	case log(path, sha, limit: 1) do

modified lib/git_gud/git/nif.ex

+3 −0

@@ -37,6 +37,9 @@ defmodule GitGud.Git.Nif do

37	37	@impl true
38	38	def commit(_path, _sha), do: nif_error()
39	39
	40	+ @impl true
	41	+ def root_commits(_path), do: {:error, :unsupported}
	42	+
40	43	@impl true
41	44	def tree(_path, _sha), do: nif_error()
42	45

modified lib/git_gud/pull_requests/pull_request.ex

+4 −1

@@ -77,11 +77,14 @@ defmodule GitGud.PullRequests.PullRequest do

77	77	\|> validate_distinct_refs()
78	78	end
79	79
	80	+ # Only meaningful within one repo. Across repos `main -> main` is the
	81	+ # ordinary fork PR, so identical ref names there are fine.
80	82	defp validate_distinct_refs(cs) do
81	83	src = get_field(cs, :source_ref)
82	84	tgt = get_field(cs, :target_ref)
	85	+ same_repo? = get_field(cs, :source_repository_id) in [nil, get_field(cs, :repository_id)]
83	86
84		− if is_binary(src) and src == tgt,
	87	+ if same_repo? and is_binary(src) and src == tgt,
85	88	do: add_error(cs, :source_ref, "must differ from target_ref"),
86	89	else: cs
87	90	end

modified lib/git_gud/repositories.ex

+95 −1

Click to load diff…

modified lib/git_gud/repositories/hook_receiver.ex

+11 −0

Click to load diff…

added lib/git_gud/repositories/repository_root.ex

+19 −0

Click to load diff…

modified lib/git_gud_web/live/pr_live/new.ex

+109 −81

Click to load diff…

added lib/mix/tasks/gitgud.backfill_roots.ex

+25 −0

Click to load diff…

added priv/repo/migrations/20260909020000_create_repository_roots.exs

+20 −0

Click to load diff…

added test/git_gud/repository_lineage_test.exs

+84 −0

Click to load diff…

added test/git_gud_web/live/pr_live/new_cross_repo_test.exs

+135 −0

Click to load diff…

Parents: eb84db3