devenv: Implement prompt for fish and zsh #15086
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@nirbheek Copying this to reduce diff between meson devenv and gst-env.py, with small change to match how it's done for bash in Meson. |
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I'm wondering if fish and/or zsh can read bash completion files? |
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eli-schwartz
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Any specific reason? |
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done |
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Co-authored-by: Nirbheek Chauhan <[email protected]>
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We don't test shell integration in CI -- as is obvious from the fact that commit 202d15d added additional code that, in the testsuite would fatally error. I don't think it is a good idea to add hacky workarounds for software nobody understands or uses and isn't tested in CI. Which is a description that has always fit "fish" like a glove (it is a shell that doesn't even support being run as a login shell, among numerous other issues). In mesonbuild#15086 (review) I raised concerns about its inclusion, but due to the holiday season was unable to respond in the narrow window of time between being asked for my reasons and the PR being merged without review. Still, the zsh changes are great, let's keep them. Zsh is a widely used shell that is well understood without hacks.
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It was proposed to be added, but then questioned and removed in mesonbuild#15086 (comment) > I'm not sure this is correct. IIUC, this file is passed as a > configuration file to bash thus it needs to be written with the system > encoding, which in Python should be what you get when encoding is not > specified. It is insane(ly broken) to use a non-ascii-compatible encoding, and we exclusively write ascii. We also test in CI that the encoding= argument is *explicitly* passed, and we do so precisely because python 3.15 changes the meaning of `encoding=None` from "system encoding" to "utf-8", so in the most absolute sense, it is simply wrong to review an `encoding=` PR and say to remove the encoding to get the system encoding. The bash logic has had that problem forever; the zsh logic only since the recent PR. Switch both to explicitly require utf-8, which is ascii-compatible and everyone should use anyway. Fixes: ``` Traceback (most recent call last): File ".../mesonbuild/mesonmain.py", line 193, in run return options.run_func(options) ~~~~~~~~~~~~~~~~^^^^^^^^^ File ".../mesonbuild/mdevenv.py", line 226, in run tmprc = tempfile.NamedTemporaryFile(mode='w') File "/usr/lib/python3.13/tempfile.py", line 574, in NamedTemporaryFile encoding = _io.text_encoding(encoding) EncodingWarning: 'encoding' argument not specified ERROR: Unhandled python exception This is a Meson bug and should be reported! ```
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