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390c2fe785
Fixes #2043. On Git Bash for Windows, Claude Code hands script paths to the shim in POSIX form (`/c/Users/...`). We exec a Windows `python.exe` (the `python3` Microsoft Store stub fails the probe), and Windows Python interprets the leading `/` as the root of the current drive — `/c/...` becomes `C:\c\Users\...` or `D:\c\Users\...` depending on which drive the shell happens to be on, fails with ENOENT, and every Edit/Write/MultiEdit blocks until the session restarts. Convert absolute path args via `cygpath -w` (a Git Bash builtin) before exec. Guarded by `command -v cygpath` so macOS/Linux fall straight through unchanged; `cygpath -w` is idempotent on already-Windows paths so the rare mixed-form case is safe. Only `/*` paths are converted — Windows-form paths reaching the shim are already openable by python.exe. Verified locally: - cygpath absent on macOS → guard skips → POSIX behavior unchanged - end-to-end shim invocation with a POSIX path on macOS exits 0 - stubbed cygpath -w on /c/Users/test/hook.py produces C:\Users\test\hook.py Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
68 lines
2.8 KiB
Bash
Executable File
68 lines
2.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Find a working Python 3 interpreter and exec the hook with it.
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#
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# On Windows + Git Bash, `python3` typically resolves to the Microsoft Store
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# stub at C:\Users\<user>\AppData\Local\Microsoft\WindowsApps\python3, which
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# exits 49 silently in non-TTY subprocess context (a known Microsoft Store
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# stub behavior). This shim
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# probes each candidate with `-c ""` and skips any that fails, so the Store
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# stub falls through to the real python.org install (`python` in Git Bash) or
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# the `py -3` launcher.
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#
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# Order:
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# 1. python3 — canonical on macOS/Linux; the Store stub fails the probe.
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# 2. python — python.org installs on Windows; some Linux distros (RHEL 7
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# EOL'd 2024-06) point this at Python 2, but `-c ""` succeeds
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# on Python 2 too — guard with a version check.
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# 3. py -3 — Windows Python launcher.
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#
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# Args after the shim path are passed straight through to the chosen
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# interpreter, so the hooks.json invocation is:
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# bash "${CLAUDE_PLUGIN_ROOT}/hooks/sg-python.sh" \
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# "${CLAUDE_PLUGIN_ROOT}/hooks/security_reminder_hook.py"
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set -e
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# Git Bash / MSYS on Windows hands script paths to this shim in POSIX form
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# (`/c/Users/...`). When we exec a Windows `python.exe` (which we do on
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# Windows since `python3` is the Microsoft Store stub), python interprets the
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# leading `/` as the root of the current drive — e.g. `/c/Users/...` becomes
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# `C:\c\Users\...` or `D:\c\Users\...` (whichever drive the shell is on),
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# fails with ENOENT, and every Edit/Write/MultiEdit tool use blocks until the
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# session restarts. See anthropics/claude-plugins-official#2043.
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#
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# Fix: convert absolute path args to native Windows form via `cygpath -w`
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# before exec. `cygpath` is a Git Bash builtin; it's absent on macOS/Linux,
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# where the `command -v` guard makes this a no-op. `cygpath -w` is idempotent
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# for already-Windows paths so the rare mixed-form case is safe.
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if command -v cygpath >/dev/null 2>&1; then
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converted=()
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for a in "$@"; do
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case "$a" in
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/*) converted+=("$(cygpath -w "$a")") ;;
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*) converted+=("$a") ;;
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esac
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done
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set -- "${converted[@]}"
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fi
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probe() {
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# $1..N: the interpreter command (may be multi-word like `py -3`)
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# Probe writes the major version to stdout and exits 0 iff it's >=3.
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"$@" -c 'import sys; print(sys.version_info[0])' 2>/dev/null
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}
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for cmd in "python3" "python" "py -3"; do
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# Word-split intentionally so `py -3` works
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# shellcheck disable=SC2086
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v=$(probe $cmd) || continue
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if [ "$v" = "3" ]; then
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# shellcheck disable=SC2086
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exec $cmd "$@"
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fi
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done
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echo "security-guidance: no working Python 3 interpreter found." >&2
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echo " tried: python3, python, py -3" >&2
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echo " on Windows, install Python from https://python.org (NOT the Microsoft Store)" >&2
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exit 1
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