Two fixes from teknium1's next install run:
1. **npm install: "npm.ps1 cannot be loaded because running scripts is
disabled on this system."** Get-Command's default PATHEXT ordering
picked up ``npm.ps1`` (the PowerShell shim) ahead of ``npm.cmd`` (the
batch shim). Most Windows users have PowerShell's execution policy
set to Restricted or RemoteSigned, which blocks unsigned ``.ps1``
files. ``npm.cmd`` has no such restriction and works universally.
Install-NodeDeps now detects when Get-Command returned npm.ps1, looks
for a sibling npm.cmd in the same directory, and prefers it. Prints
an info line so the user sees why. Emits a warning + hint if only
npm.ps1 is available.
2. **"Launch hermes chat now? Y" crashes with "%1 is not a valid Win32
application" on Windows installs.** The setup wizard calls
``relaunch(["chat"])``; ``resolve_hermes_bin()`` returned
``sys.argv[0]`` which was ``...\\hermes_cli\\main.py`` (because hermes
was launched via ``python -m hermes_cli.main`` during setup).
On Windows, ``os.access(script.py, os.X_OK)`` returns True because
PATHEXT lists ``.py`` when the Python launcher is registered — but
``subprocess.run([script.py, ...])`` can't actually execute a ``.py``
directly. CreateProcessW needs a real PE file.
Fixed ``resolve_hermes_bin`` to reject ``.py``/``.pyc`` argv0 values
on Windows specifically. Falls through to ``shutil.which("hermes")``
(hermes.exe in the venv Scripts dir) or, as a final fallback, lets
build_relaunch_argv build ``[sys.executable, "-m", "hermes_cli.main"]``
which is bulletproof. POSIX behaviour unchanged — ``.py`` argv0 with
a shebang + chmod+x is still a valid exec target there.
3 new tests cover the Windows paths: .py argv0 + hermes.exe on PATH →
returns hermes.exe; .py argv0 + no PATH → returns None (caller uses
python -m); POSIX + executable .py → still accepted.
26 relaunch tests pass, no POSIX regressions.
Three real bugs from teknium1's first Windows install run:
1. **MinGit has no bash.exe.** MinGit is the minimal-automation Git for Windows
distribution — it ships git.exe but deliberately strips bash and the POSIX
coreutils. Installer logged "Could not locate bash.exe" and Hermes would
fail to run any shell command. Switched to PortableGit — the full Git for
Windows minus the installer UI. PortableGit ships bash.exe at
<root>\bin\bash.exe plus sh, awk, sed, grep, curl, ssh in usr\bin\. ARM64
variant is detected separately (PortableGit-*-arm64.7z.exe). 32-bit falls
back to MinGit-32-bit with a warning (PortableGit is 64-bit only).
PortableGit ships as a 7z self-extractor (56MB vs MinGit's 38MB). We
invoke it with `-o<target> -y` to extract silently — no 7z install needed,
it's self-contained.
Updated tools/environments/local.py::_find_bash candidate order to prefer
the PortableGit layout (<root>\bin\bash.exe) with the MinGit layout
(<root>\usr\bin\bash.exe) as a fallback so existing installs keep working.
2. **os.execvp "Exec format error" on Windows.** Setup wizard's "Launch
hermes chat now? Y" called `os.execvp(["hermes", "chat"])` which on
Windows can only swap to real Win32 .exe files — chokes with OSError(8)
on .cmd batch shims and Python console-script wrappers. Added a
win32 branch in hermes_cli/relaunch.py::relaunch() that uses
subprocess.run + sys.exit — functionally identical (user sees "hermes
exited, then new hermes started") with one extra PID in play. POSIX
path is UNCHANGED — still uses os.execvp for in-place replacement.
Catches OSError in the Windows branch and surfaces a "open a new
terminal so PATH picks up, then re-run hermes" hint instead of a
cryptic traceback.
3. **npm install failures silent on Windows.** The install.ps1 was invoking
`npm install --silent 2>&1 | Out-Null` inside a try/catch. PowerShell's
try/catch does NOT trigger on non-zero process exit codes — only on
unhandled .NET exceptions — so npm failing printed a generic "npm
install failed" with zero information about WHY. The silent pipe ate
the stderr.
Rewrote Install-NodeDeps to:
- Resolve npm.cmd via Get-Command (respects PATHEXT) instead of
relying on bare `npm` name resolution.
- Use Start-Process with -PassThru to capture the actual exit code.
- Redirect stderr to a temp log and surface the first ~800 chars of
the real npm error when install fails, plus the log path for the
full text.
- Fail loudly with the right exit code instead of a misleading success.
- Bail cleanly with a helpful message when npm isn't on PATH at all.
4. **"True" printing to console after Node check.** `Test-Node` returns $true;
installer called it as a bare statement (no assignment, no cast). PowerShell
prints bare return values. Wrapped the call in `[void](Test-Node)`.
## Tests
- Added 3 new tests in tests/hermes_cli/test_relaunch.py covering the
Windows branch: subprocess is called (not execvp), child exit code
propagates, OSError surfaces a helpful message. All 23 tests pass
(20 existing + 3 new).
- 77 Windows-compat tests still pass, POSIX behaviour unchanged.
Pull the top-level + chat parser construction out of main() into
hermes_cli/_parser.py so relaunch.py can introspect parser._actions to
discover which flags exist and whether they take values, instead of
maintaining a parallel hand-rolled (flag, takes_value) tuple list.
- _parser.py: build_top_level_parser() returns (parser, subparsers,
chat_parser); side-effect-free import.
- main.py: ~290 lines of inline parser construction collapsed to a
helper call. Other subparsers stay inline (dispatch is bound to
module-level cmd_* functions).
- _parser._inherited_flag(parser, ...): wraps parser.add_argument and
sets action.inherit_on_relaunch = True. Used in place of
parser.add_argument for the 25 flags (top-level + chat) that need to
carry over.
- _parser.PRE_ARGPARSE_INHERITED_FLAGS: holds --profile/-p, which
isn't on argparse (consumed earlier by main._apply_profile_override).
- relaunch.py: drops _CRITICAL_DESTS and _PRE_ARGPARSE_FLAGS; the table
builder now filters by getattr(action, 'inherit_on_relaunch', False).
- test_ignore_user_config_flags.py: brittle inspect.getsource grep
replaced with proper parser introspection.
- test_relaunch.py: introspection sanity tests added.
Salvaged from PR #17549; added top-level -t/--toolsets flag to
_parser.py so #17623 (fix(tui): honor launch toolsets) behavior is
preserved on current main.
Co-authored-by: ethernet <arilotter@gmail.com>
Extract all os.execvp('hermes', ...) calls into a utility so flags like
--tui, --dev, --profile, --model, --provider, et al. survive session
resume and post-setup relaunch.
- resolve_hermes_bin: prefers sys.argv[0] when callable, then PATH,
then falls back to '${sys.executable} -m hermes_cli.main' (fixes nix
run relaunches)
- build_relaunch_argv: allowlists critical flags so they carry over
- cmd_sessions browse now calls relaunch(['--resume', <id>])
- _apply_profile_override skips redundant work when HERMES_HOME is
already set (child inherits parent profile)
- setup.py replaces _resolve_hermes_chat_argv with relaunch_chat()
- added comprehensive tests for flag extraction and binary resolution
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
