guix/gnu/packages/patches/mercurial-hg-extension-path.patch
Xinglu Chen ae0882bbd6
gnu: mercurial: Patch to make it read HGEXTENSIONPATH.
This will make Mercurial be able to find third-party extensions installed with
Guix, without having to set PYTHONPATH.

* gnu/packages/patches/mercurial-hg-extension-path.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register the patch.
* gnu/packages/version-control.scm (mercurial)[origin](patches): Apply the
patch.
[native-search-paths]: Add HGEXTENSIONPATH.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
2021-05-16 23:28:11 +02:00

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Diff

This is needed to make Mercurial read the HGEXTENSIONPATH to detect
third-party extensions. It is called HGEXTENSIONPATH and not
HG_EXTENSION_PATH to keep it consistent with other environment variables for
Mercurial, e.g. HGENCODINGAMBIGUOUS, HGEDITOR ... Hopefully I or someone else
will get this into Mercurial proper.
diff --git a/mercurial/extensions.py b/mercurial/extensions.py
--- a/mercurial/extensions.py
+++ b/mercurial/extensions.py
@@ -13,6 +13,7 @@
import imp
import inspect
import os
+import sys
from .i18n import (
_,
@@ -108,6 +109,11 @@
def _importh(name):
"""import and return the <name> module"""
+ # Read HGEXTENSIONSPATH environment variable when import extensions.
+ extension_path = os.getenv("HGEXTENSIONSPATH")
+ if extension_path is not None:
+ for path in extension_path:
+ sys.path.append(path)
mod = __import__(pycompat.sysstr(name))
components = name.split(b'.')
for comp in components[1:]: