Adds a machine-readable output mode to `flask routes`. When --json is
passed, the route table is emitted as a JSON array instead of the text
table. Each entry has `endpoint`, `methods` (sorted list), and `rule`;
subdomain apps also emit `subdomain`, host-matching apps emit `host`.
HEAD/OPTIONS are filtered unless --all-methods is also passed. Empty
apps produce `[]`. The --sort flag is honoured in JSON mode.
Backwards compatible: the flag is optional and all existing invocations
of `flask routes` are unaffected.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Remove the `--eager-loading/--lazy-loading` options and the
`DispatchingApp` middleware. The `run` command handles loading
exceptions directly. The reloader always prints out tracebacks
immediately and always defers raising the error.
As long as popular libraries (e.g. Celery) require click 7, depending
on Click 8 in Flask makes it hard to test the latest version (and its
other dependencies) in existing applications.
When loading the app fails for the --help command, only the error
message is shown, then the help text. The full traceback is shown for
other exceptions. Also show the message when loading fails while
getting a command, instead of only "command not found". The error
message goes to stderr to match other error behavior, and is in red
with an extra newline to make it more obvious next to the help text.
Also fixes an issue with the test_apps fixture that caused an imported
app to still be importable after the test was over and the path was
reset. Now the module cache is reset as well.
