migratr-cli 0.1.2

The migratr command line: new, up, down, status, plan and restore for SQLite schema migrations.
migratr-cli-0.1.2 is not a library.

migratr

CLI

migratr [--db PATH] [--dir PATH] [--json] <new|up|down|status|plan|restore> ...

--dir defaults to migrations. --db is required by every command except new.

Command What it does
new <name> [specs...] Scaffold a migration file.
up [--to V] Apply pending migrations.
down [--steps N] Reverse the newest N applied migrations (default 1).
status List each migration as applied (with time) or pending, checksum mismatches, missing files, and the latest snapshot.
plan [up [--to V] | down [--steps N]] Print the statements a run would execute, which steps are destructive, the snapshot each would take, and the database size. Changes nothing.
restore [--snapshot PATH] --yes Replace the database with a snapshot. Without --yes nothing changes.

After every successful up and down, migratr writes schema.json in the migrations directory.

JSON output

With --json, a command writes one JSON document to stdout and nothing else; logs go to stderr. The document carries command and status (ok or error). A success adds the outcome's fields. A failure adds code and message and the process exits non-zero (2 for a usage error, 1 otherwise).

Error codes

Codes are stable across patch releases.

Code Cause
usage Bad arguments, or a missing --db.
parse A migration file or spec could not be parsed.
duplicate_version Two migration files share a version.
io A file or directory could not be read or written.
checksum_mismatch An applied migration's file was edited.
missing_file A ledger row has no migration file.
apply_failed A migration failed and was rolled back.
irreversible A migration in the down range has an operation with no inverse.
unparseable_table A table's CREATE TABLE could not be parsed for a rebuild.
foreign_key_violation A table rebuild left rows that violate foreign keys.
column_in_use A dropped column is used by another object.
rebuild_not_first An operation that needs a table rebuild is not first in its migration.
snapshot_failed A snapshot could not be written, so the step did not run.
restore_not_confirmed restore ran without --yes.
unknown_object new named an object that is not in schema.json.
database SQLite reported an error.