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source dump of claude code forked from oppi.li/claude-code
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4.7 kB · 123 lines
TypeScript
at main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124/** * Deep Link Origin Banner * * Builds the warning text shown when a session was opened by an external * claude-cli:// deep link. Linux xdg-open and browsers with "always allow" * set dispatch the link with no OS-level confirmation, so the application * provides its own provenance signal — mirroring claude.ai's security * interstitial for external-source prefills. * * The user must press Enter to submit; this banner primes them to read the * prompt (which may use homoglyphs or padding to hide instructions) and * notice which directory — and therefore which CLAUDE.md — was loaded. */
import { stat } from 'fs/promises'import { homedir } from 'os'import { join, sep } from 'path'import { formatNumber, formatRelativeTimeAgo } from '../format.js'import { getCommonDir } from '../git/gitFilesystem.js'import { getGitDir } from '../git.js'
const STALE_FETCH_WARN_MS = 7 * 24 * 60 * 60 * 1000
/** * Above this length, a pre-filled prompt no longer fits on one screen * (~12-15 lines on an 80-col terminal). The banner switches from "review * carefully" to an explicit "scroll to review the entire prompt" so a * malicious tail buried past line 60 isn't silently off-screen. */const LONG_PREFILL_THRESHOLD = 1000
export type DeepLinkBannerInfo = { /** Resolved working directory the session launched in. */ cwd: string /** Length of the ?q= prompt pre-filled in the input box. Undefined = no prefill. */ prefillLength?: number /** The ?repo= slug if the cwd was resolved from the githubRepoPaths MRU. */ repo?: string /** Last-fetch timestamp for the repo (FETCH_HEAD mtime). Undefined = never fetched or not a git repo. */ lastFetch?: Date}
/** * Build the multi-line warning banner for a deep-link-originated session. * * Always shows the working directory so the user can see which CLAUDE.md * will load. When the link pre-filled a prompt, adds a second line prompting * the user to review it — the prompt itself is visible in the input box. * * When the cwd was resolved from a ?repo= slug, also shows the slug and the * clone's last-fetch age so the user knows which local clone was selected * and whether its CLAUDE.md may be stale relative to upstream. */export function buildDeepLinkBanner(info: DeepLinkBannerInfo): string { const lines = [ `This session was opened by an external deep link in ${tildify(info.cwd)}`, ] if (info.repo) { const age = info.lastFetch ? formatRelativeTimeAgo(info.lastFetch) : 'never' const stale = !info.lastFetch || Date.now() - info.lastFetch.getTime() > STALE_FETCH_WARN_MS lines.push( `Resolved ${info.repo} from local clones · last fetched ${age}${stale ? ' — CLAUDE.md may be stale' : ''}`, ) } if (info.prefillLength) { lines.push( info.prefillLength > LONG_PREFILL_THRESHOLD ? `The prompt below (${formatNumber(info.prefillLength)} chars) was supplied by the link — scroll to review the entire prompt before pressing Enter.` : 'The prompt below was supplied by the link — review carefully before pressing Enter.', ) } return lines.join('\n')}
/** * Read the mtime of .git/FETCH_HEAD, which git updates on every fetch or * pull. Returns undefined if the directory is not a git repo or has never * been fetched. * * FETCH_HEAD is per-worktree — fetching from the main worktree does not * touch a sibling worktree's FETCH_HEAD. When cwd is a worktree, we check * both and return whichever is newer so a recently-fetched main repo * doesn't read as "never fetched" just because the deep link landed in * a worktree. */export async function readLastFetchTime( cwd: string,): Promise<Date | undefined> { const gitDir = await getGitDir(cwd) if (!gitDir) return undefined const commonDir = await getCommonDir(gitDir) const [local, common] = await Promise.all([ mtimeOrUndefined(join(gitDir, 'FETCH_HEAD')), commonDir ? mtimeOrUndefined(join(commonDir, 'FETCH_HEAD')) : Promise.resolve(undefined), ]) if (local && common) return local > common ? local : common return local ?? common}
async function mtimeOrUndefined(p: string): Promise<Date | undefined> { try { const { mtime } = await stat(p) return mtime } catch { return undefined }}
/** * Shorten home-dir-prefixed paths to ~ notation for the banner. * Not using getDisplayPath() because cwd is the current working directory, * so the relative-path branch would collapse it to the empty string. */function tildify(p: string): string { const home = homedir() if (p === home) return '~' if (p.startsWith(home + sep)) return '~' + p.slice(home.length) return p}