# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 2022-05-03 02:04:59
# Node ID 1b6e381521c5288b9223443b42321220c0839233
# Parent  f2ef6a4f918f59f2ff01e5d4dc01c94ea35bd32f

doc: use an absolute path in sys.path to work around a python DLL loading bug

This bug[1] was causing the zstd entry under "Available Compression Engines" to
be omitted from the documentation for some versions of python3.  I could
upgrade, but past upgrades have broken venvs and clobbered installed packages.
It's a trivial workaround, so there's no sense in leaving this subtle issue.  It
was flushed out by changing the module policy here from 'allow' to 'c', and
seeing this error:

    ImportError: DLL load failed while importing parsers: The parameter is incorrect.

[1] https://github.com/python/cpython/issues/87271

Differential Revision: https://phab.mercurial-scm.org/D12599

diff --git a/doc/gendoc.py b/doc/gendoc.py
--- a/doc/gendoc.py
+++ b/doc/gendoc.py
@@ -22,7 +22,7 @@ except ImportError:
 # available. Relax C module requirements.
 os.environ['HGMODULEPOLICY'] = 'allow'
 # import from the live mercurial repo
-sys.path.insert(0, "..")
+sys.path.insert(0, os.path.abspath(".."))
 from mercurial import demandimport
 
 demandimport.enable()