feat(config): add shell to watch_files run

[risu729]

Summary

• add optional shell support for [[watch_files]] entries that use run
• render shell through config templates and fall back to the configured default inline shell args when unset
• update docs/schema and add an e2e for fallback and override behavior

Testing

• cargo fmt --check
• jq empty schema/mise.json
• mise run test:e2e config/test_watch_files_shell
• Not completed locally: mise run test:unit was stopped while still queued behind the shared Cargo wrapper semaphore; CI will run the full suite.

This PR was generated by an AI coding assistant.

[greptile-apps]

Greptile Summary

This PR adds an optional shell field to [[watch_files]] entries that use run, letting users override the inline shell on a per-entry basis while falling back to the globally configured unix_default_inline_shell_args / windows_default_inline_shell_args when unset.

• src/watch_files.rs: WatchFile gains a shell: Option<String> field; execute() now accepts it, parses it with shell_words::split, and a new warning fires when shell is set alongside task. This also fixes a latent panic: the old shell[0] index access is replaced by a safe split_first().ok_or_else(…).
• schema/mise.json: unevaluatedProperties: false is moved inside each oneOf branch so schema validators correctly reject shell on task-based entries.
• Tests and docs: a new e2e script exercises both the fallback and override paths; the schema e2e adds a negative fixture for task + shell; and docs/hooks.md is updated with an example.

Confidence Score: 5/5

Safe to merge — the change is well-scoped, correctly falls back to the existing default shell, and the previous silent-ignore of shell with task is now warned about both at runtime and rejected by the schema.

All three layers (runtime warning, schema enforcement, e2e tests) are in place. The refactor from shell[0] to split_first() is strictly an improvement, and template rendering of the new field is consistent with the existing run/task handling.

No files require special attention.

Important Files Changed

Filename	Overview
src/watch_files.rs	Adds optional shell field to WatchFile, passes it into execute(), uses shell_words::split for parsing, and adds a warning when shell + task are set together. Also fixes a latent panic by replacing shell[0] with split_first().ok_or_else().
src/config/config_file/mise_toml.rs	Adds template rendering for the new shell field, consistent with how run and task are already handled.
schema/mise.json	Restructures watch_files schema: moves unevaluatedProperties: false inside each oneOf branch so shell is only allowed in the run variant, correctly preventing task + shell combinations at schema-validation time.
e2e/config/test_watch_files_shell	New e2e test that validates both the fallback shell and the explicit per-entry shell override paths through live mise hook-env invocations.
e2e/config/test_schema_tombi	Adds a valid watch_files entry with shell to the positive fixture and a task + shell entry to the negative fixture, exercising the new schema constraints.
docs/hooks.md	Adds documentation for the new shell field, including the fallback to the global inline shell settings and a TOML example.

_{Reviews (6): Last reviewed commit: "Merge branch 'main' into feat/watch-file..." | Re-trigger Greptile}

[gemini-code-assist]

Code Review

This pull request introduces a shell option for watch_files hooks, allowing users to specify a custom inline shell command instead of relying on the default. The changes include updates to the documentation, JSON schema, configuration parsing, and the execution logic in src/watch_files.rs, supported by a new end-to-end test. Feedback was provided regarding the eager evaluation of the default shell in the execute function, suggesting an optimization to avoid unnecessary overhead when a custom shell is already defined.