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Neil
e26f849682
* fix(wsl): budget the whole command line, not just the script The argv/stdin threshold measured `script.length`, but the cap applies to the finished command line -- which also carries `PATH=<login PATH>` and `HOME=`. A login PATH is itself a few KB. That produced a perverse band: with a long enough PATH, a 7,999-char hook was placed on argv and CreateProcess refused it, while the SAME hook at 8,001 chars flipped to stdin and ran. Size decided how a hook behaved, in the wrong direction, and the failure looked like "your setup hook failed" with nothing pointing at length. Now the argv form is built, measured, and only used if the whole line fits; otherwise the script goes to stdin as before. The count over-estimates slightly (it charges quoting for every argument) because over-counting is the safe direction for a cap. The regression test uses a 7,000-char script -- deliberately under any script-only threshold -- with a 27KB PATH, and asserts it lands on stdin. My first attempt used 7,999 + `echo `, which is 8,004 and flipped under the old rule too, so it passed either way and proved nothing. Credit: Grok. * fix(wsl): charge quoting and measure the line that is actually spawned Two under-counts the review found in the estimator I added. The doc comment claimed it over-counts. It did not: libuv escapes every `"` and doubles a backslash run before a quote, so a quote-dense script costs more than its length. And `wsl.exe` plus `-d <distro> --exec` are prepended AFTER the measurement, so ~45 characters of the budget were never counted. Together those put a quote-heavy ~26KB script on argv and over the real 32767 ceiling -- where the old script-only rule would have sent it to stdin and it would have run. A narrower band than the one this PR removes, but the same shape of bug, so worth closing before merge rather than after. Now charges one character per `"` or backslash and measures the full spawn line. New test: 26,000 quote characters must land on stdin; verified to fail with the quoting charge removed.