Module fetch 

Packaging slice 2b (#2240): fetching git dependencies and writing bynk.lock — the one place the toolchain touches the network (track design/tracks/packaging.md §6.4, decision A).

Before check, test, dev or deploy compiles, prepare resolves the project’s (or its workspace’s) dependencies against bynk.lock:

• a locked git dependency whose manifest entry is unchanged keeps its locked commit; one missing from the store is fetched at that commit;
• a new or changed one (or every one named by bynk update) is resolved from its rev, fetched, and hashed;
• every git package’s store entry is re-hashed against the lock, so a tampered or corrupted entry fails the build (checksum_mismatch);
• the lock is rewritten when the graph changed — or, under --locked, the command fails instead (lock_out_of_date). Under --offline, any needed fetch fails.

Git runs as the user’s own git, hardened per track §6.3 (decision B): only https and ssh transports (plus file from the project’s own manifests), no hooks, no submodules, -- before positional arguments, and no URL or revision that looks like an option. Bynk passes no credentials: a private repository works through the user’s git setup.

The compile never fetches: bynkc, the language server and the playground read the lock and the store (bynk_emit::project’s graph resolution reports not_fetched for a missing entry).

Structs

FetchError

A failure, as one diagnostic line: its code and message.

FetchOptions

How a bynk command may change the lock and the store.

Prepared

What prepare did.

Functions

prepare

Resolve, fetch and lock the dependencies of the project at project_dir (and of every member of its workspace, which shares one lock). A project with no dependencies and no lock is untouched.

store_hex

The checksum’s store directory name, for messages and tests.

tree_checksum

The canonical-tree checksum (decision C): every regular file under dir except .git, in byte-wise sorted /-separated path order, each contributing path \0 length \0 bytes. Symbolic links aren’t files and contribute nothing.