Skip to content

Fix issue #20 by specifying explicit target path for depencies install #36

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
ChrisMzz wants to merge 3 commits into
base: master
Choose a base branch
from
Open

Fix issue #20 by specifying explicit target path for depencies install #36

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
4082060
specify explicit target path for dependencies install
ChrisMzz Dec 22, 2025
fa6ab96
use `site.getsitepackages` to construct correct install path
ChrisMzz Jan 14, 2026
44f5d8e
auto-detect the possibility of specifying target flags depending on `…
ChrisMzz Jan 16, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 13 additions & 2 deletions src/main/resources/blender-scripts/install_addon.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,8 @@
import bpy
import sys
import addon_utils
from pathlib import Path
import site
Comment on lines +35 to +36
Copy link
Copy Markdown
Collaborator

@maarzt maarzt Jan 19, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Suggested change
from pathlib import Path
import site

not required anymore


# install pip

Expand All @@ -44,6 +46,13 @@ def get_python_path():
path = sys.executable
return os.path.abspath(path)

def get_target_flags():
# On Windows pip will sometimes install dependencies to the wrong folder when not setting the target flag.
# See: https://github.com/mastodon-sc/mastodon-blender-view/pull/36
for path in site.getsitepackages():
if "site-packages" in path:
return ["--target", path]
return []
Comment on lines +49 to +55
Copy link
Copy Markdown
Collaborator

@maarzt maarzt Jan 19, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Suggested change
def get_target_flags():
# On Windows pip will sometimes install dependencies to the wrong folder when not setting the target flag.
# See: https://github.com/mastodon-sc/mastodon-blender-view/pull/36
for path in site.getsitepackages():
if "site-packages" in path:
return ["--target", path]
return []

not required


os.environ.pop("PIP_REQ_TRACKER", None)
ensurepip.bootstrap()
Expand All @@ -52,8 +61,10 @@ def get_python_path():
# install dependencies

python_path = get_python_path()
packages = {'grpcio', 'bidict', 'grpcio-tools', 'pandas'}
subprocess.check_output([python_path, '-m', 'pip', 'install', *packages])
target_flags = get_target_flags()

packages = ['grpcio', 'bidict', 'grpcio-tools', 'pandas']
subprocess.check_output([python_path, '-m', 'pip', 'install', *target_flags, *packages])
Comment on lines +64 to +67
Copy link
Copy Markdown
Collaborator

@maarzt maarzt Jan 19, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Suggested change
target_flags = get_target_flags()
packages = ['grpcio', 'bidict', 'grpcio-tools', 'pandas']
subprocess.check_output([python_path, '-m', 'pip', 'install', *target_flags, *packages])
env = dict(os.environ)
env["PYTHONNOUSERSITE"] = "1"
packages = {'grpcio', 'bidict', 'grpcio-tools', 'pandas'}
subprocess.check_call([python_path, '-m', 'pip', 'install', *packages], env=env)

We don't need to provide a --target flag. Passing a PYTHONNOUSERSITE is apparently the preferred solution, as demonstrated her https://github.com/robertguetzkow/blender-python-examples/blob/92214a9d74eedad8572e890a374d5204623c796a/add_ons/install_dependencies/install_dependencies.py#L114-L117


# test if dependencies are installed

Expand Down