File size: 6,789 Bytes
e249c6d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | import fs from "node:fs/promises";
import { requireGitCommandOutput } from "../../infra/git-exec.js";
import { insideGitCheckout, runGit } from "./git.js";
import { resolveCheckoutRootFromRealPath } from "./repository-paths.js";
import type { ManagedWorktreeBranch, ManagedWorktreeBranchesResult } from "./types.js";
const BRANCH_INVENTORY_MAX_OUTPUT_BYTES = 256 * 1024;
const BRANCH_SUGGESTIONS_PER_KIND = 100;
type RepositoryBranchRef = {
ref: string;
branchName: string;
branch: ManagedWorktreeBranch;
symbolicRef?: string;
current?: boolean;
};
async function listRepositoryBranchRefs(
repoRoot: string,
patterns: string[],
count?: number,
): Promise<RepositoryBranchRef[]> {
const result = await runGit(
repoRoot,
[
"-c",
"core.warnAmbiguousRefs=true",
"for-each-ref",
...(count === undefined ? [] : [`--count=${count}`]),
"--sort=refname",
count === undefined
? "--format=%(refname)%00%(refname:short)%00%(symref)%00%(HEAD)"
: "--format=%(refname)%00%(refname:short)",
...patterns,
],
{
maxOutputBytes: BRANCH_INVENTORY_MAX_OUTPUT_BYTES,
terminateOnOutputLimit: count === undefined,
},
);
const output = requireGitCommandOutput("git for-each-ref", result);
const branches: RepositoryBranchRef[] = [];
for (const line of output.trim().split("\n")) {
const [ref, name, symbolicRef, head] = line.split("\0");
const metadata = { symbolicRef: symbolicRef || undefined, current: head === "*" };
if (!ref || !name) {
continue;
}
if (ref.startsWith("refs/heads/")) {
branches.push({
ref,
...metadata,
branchName: ref.slice("refs/heads/".length),
branch: { name, kind: "local" },
});
} else if (ref.startsWith("refs/remotes/")) {
const remoteRef = ref.slice("refs/remotes/".length);
const slash = remoteRef.indexOf("/");
const branchName = slash > 0 ? remoteRef.slice(slash + 1) : "";
branches.push({ ref, branchName, ...metadata, branch: { name, kind: "remote" } });
}
}
return branches;
}
export async function readRepositoryBranches(
repoRoot: string,
options: { includeRepositoryStatus?: boolean } = {},
): Promise<ManagedWorktreeBranchesResult> {
let sourceRoot: string;
try {
const requested = await fs.realpath(repoRoot).catch(() => {
throw new Error(`repository does not exist: ${repoRoot}`);
});
if (options.includeRepositoryStatus) {
if (!(await fs.stat(requested)).isDirectory()) {
return { branches: [], repositoryStatus: "unavailable" };
}
if (!insideGitCheckout(requested)) {
return { branches: [], repositoryStatus: "not_git" };
}
}
// Ref discovery needs this checkout's HEAD, not allocation identity or a
// full inventory of sibling worktrees rooted at the primary checkout.
sourceRoot = await resolveCheckoutRootFromRealPath(requested, repoRoot);
} catch (error) {
if (options.includeRepositoryStatus) {
return { branches: [], repositoryStatus: "unavailable" };
}
throw error;
}
// One fresh inventory carries current/default refs as well as strict selection names.
// Fall back to count-bounded queries when a large repository exceeds the byte guard.
let inventory: RepositoryBranchRef[] | undefined;
try {
inventory = await listRepositoryBranchRefs(sourceRoot, ["refs/heads/", "refs/remotes/"]);
} catch {
inventory = undefined;
}
const branches = new Map<string, RepositoryBranchRef>();
let branchesUnavailable = false;
for (const prefix of ["refs/remotes/", "refs/heads/"]) {
try {
const entries = inventory
? inventory
.filter((entry) => entry.ref.startsWith(prefix))
.slice(0, BRANCH_SUGGESTIONS_PER_KIND)
: await listRepositoryBranchRefs(sourceRoot, [prefix], BRANCH_SUGGESTIONS_PER_KIND);
for (const entry of entries) {
if (entry.branchName && (entry.branch.kind !== "remote" || entry.branchName !== "HEAD")) {
// Local branches win collisions with the same logical remote branch name.
branches.set(entry.branchName, entry);
}
}
} catch {
branchesUnavailable = true;
}
}
let defaultRef: string | undefined;
let headRef: string | undefined;
if (inventory) {
defaultRef = inventory.find((entry) => entry.ref === "refs/remotes/origin/HEAD")?.symbolicRef;
headRef = inventory.find((entry) => entry.current)?.ref;
} else {
const remoteHead = await runGit(sourceRoot, [
"symbolic-ref",
"--quiet",
"refs/remotes/origin/HEAD",
]);
defaultRef = remoteHead.code === 0 ? remoteHead.stdout.trim() : undefined;
const head = await runGit(sourceRoot, ["symbolic-ref", "--quiet", "HEAD"]);
headRef = head.code === 0 ? head.stdout.trim() : undefined;
}
const resolveBranch = async (ref: string | undefined) => {
if (!ref) {
return undefined;
}
const known = (inventory ?? [...branches.values()]).find((entry) => entry.ref === ref);
if (known || inventory) {
return known?.branchName && (known.branch.kind !== "remote" || known.branchName !== "HEAD")
? known
: undefined;
}
try {
// Patterns can match descendants; only the exact priority ref is eligible.
return (await listRepositoryBranchRefs(sourceRoot, [ref], 1)).find(
(entry) =>
entry.ref === ref &&
entry.branchName &&
(entry.branch.kind !== "remote" || entry.branchName !== "HEAD"),
);
} catch {
branchesUnavailable = true;
return undefined;
}
};
const localDefaultRef = defaultRef?.startsWith("refs/remotes/origin/")
? `refs/heads/${defaultRef.slice("refs/remotes/origin/".length)}`
: undefined;
// Priority refs must survive the inventory bound and use the same disambiguation.
const defaultEntry = (await resolveBranch(localDefaultRef)) ?? (await resolveBranch(defaultRef));
const headEntry = await resolveBranch(headRef);
for (const entry of [defaultEntry, headEntry]) {
if (entry) {
branches.set(entry.branchName, entry);
}
}
const rank = (entry: RepositoryBranchRef) =>
entry.ref === defaultEntry?.ref ? 0 : entry.ref === headEntry?.ref ? 1 : 2;
return {
branches: [...branches.values()]
.toSorted((a, b) => rank(a) - rank(b) || a.branch.name.localeCompare(b.branch.name))
.map((entry) => entry.branch),
...(defaultEntry ? { defaultBranch: defaultEntry.branch.name } : {}),
...(headEntry ? { headBranch: headEntry.branch.name } : {}),
...(options.includeRepositoryStatus ? { repositoryStatus: "git" as const } : {}),
...(branchesUnavailable ? { branchesUnavailable: true } : {}),
};
}
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