OSX: Command line switch -- disables ability to use python arguments beginning with -h #56092

New Issue

Jon Hammer · 2018-07-24T19:01:30+02:00

Jon Hammer commented

2018-07-24 19:01:30 +02:00

System Information
OSX 10.13.5

Blender Version
Broken: 2.79b f4dc9f9
Worked: N/A

Short description of error
The documentation for the command line argument -- says that any arguments that appear afterwards are ignored. This isn't currently strictly true. Any additional argument that begins with the string -h will be seen as a request for Blender's help screen, rather than being passed directly to the Python script. For example:

/Applications/Blender/blender.app/Contents/MacOS/blender --python some_script.py -- -height

produces the following output:

Read prefs: /Users/jch002j/Library/Application Support/Blender/2.79/config/userpref.blend
found bundled python: /Applications/Blender/blender.app/Contents/Resources/2.79/python
usage: blender [-h]
               [--cycles-resumable-num-chunks CYCLES_RESUMABLE_NUM_CHUNKS]
               [--cycles-resumable-current-chunk CYCLES_RESUMABLE_CURRENT_CHUNK]
               [--cycles-resumable-start-chunk CYCLES_RESUMABLE_START_CHUNK]
               [--cycles-resumable-end-chunk CYCLES_RESUMABLE_END_CHUNK]
blender: error: argument -h/--help: ignored explicit argument 'eight'

This effectively prevents any python script from using arguments that begin with -h, which is an unusual scripting limitation. Ideally, Blender would actually ignore these arguments, allowing the python script to continue.

Exact steps for others to reproduce the error

/Applications/Blender/blender.app/Contents/MacOS/blender -- -height

**System Information** OSX 10.13.5 **Blender Version** Broken: 2.79b f4dc9f9 Worked: N/A **Short description of error** The documentation for the command line argument `--` says that any arguments that appear afterwards are ignored. This isn't currently strictly true. Any additional argument that begins with the string `-h` will be seen as a request for Blender's help screen, rather than being passed directly to the Python script. For example: ``` /Applications/Blender/blender.app/Contents/MacOS/blender --python some_script.py -- -height ``` produces the following output: ``` Read prefs: /Users/jch002j/Library/Application Support/Blender/2.79/config/userpref.blend found bundled python: /Applications/Blender/blender.app/Contents/Resources/2.79/python usage: blender [-h] [--cycles-resumable-num-chunks CYCLES_RESUMABLE_NUM_CHUNKS] [--cycles-resumable-current-chunk CYCLES_RESUMABLE_CURRENT_CHUNK] [--cycles-resumable-start-chunk CYCLES_RESUMABLE_START_CHUNK] [--cycles-resumable-end-chunk CYCLES_RESUMABLE_END_CHUNK] blender: error: argument -h/--help: ignored explicit argument 'eight' ``` This effectively prevents any python script from using arguments that begin with `-h`, which is an unusual scripting limitation. Ideally, Blender would actually ignore these arguments, allowing the python script to continue. **Exact steps for others to reproduce the error** ``` /Applications/Blender/blender.app/Contents/MacOS/blender -- -height ```

Jon Hammer commented

2018-07-24 19:01:30 +02:00

Added subscriber: @jhammer

Campbell Barton changed title from ~~Command line switch -- disables ability to use python arguments beginning with -h~~ to OSX: Command line switch -- disables ability to use python arguments beginning with -h

2018-07-27 07:20:46 +02:00

Campbell Barton commented

2018-07-27 07:21:36 +02:00

Added subscriber: @ideasman42