[jordanella]

A full tests/run_all.py is about 490 checks and several minutes, and the ones an edit touches had to be picked by hand, which is how a check that cuts a function far from the edit gets missed (AGENTS.md: "Tests read the source"). This is the dev-loop proposal's D1 (#2636).

Change

tests/run_all.py --changed [BASE] takes the files changed since BASE's merge base (origin/main by default), committed or not, plus the untracked ones, and runs:

• the checks whose text names one of them: by path, by file name standing alone, or as a module they import (import chunks, from chunks import);
• the changed checks themselves, and the byte-compile check;
• the C++ unit tests when something under gpu/ changed;
• every check when the runner itself or a shared file under tests/ changed.

It prints how many files changed and how many checks read them, and that a pull request still needs the whole run. Nothing else in the runner changes.

Example

On this branch (the runner changed): --changed: 2 files changed since origin/main, every check (the runner or a shared test file changed). For a change to nx2/chunks.py alone it picks the chunk, emit and lift-cache checks (under a quarter of all), not the renderer's.

Testing

• tests/test_run_all_changed.py (new): which checks a changed file picks (by path, by name and not inside a longer name, by import), that a changed check runs itself, that the runner or a shared test file runs everything, that an unnamed file runs none, and the files from git (committed, uncommitted and untracked) in a scratch repository.
• run_all.py --changed origin/main on this branch, Windows: every check, as above: 423 passed, 21 failed, 79 skipped. The 21 fail the same way on main here (this PC's compilers and Linux-only checks).
• The checks that read the changed files (10): pass, apart from test_spawn_emit, which fails the same way on main here.

See #2636 (D1).

🤖 Generated with Claude Code