interp: display all Bash's shopt option
#883
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riacataquian
commented
Jun 20, 2022
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Rather than keeping two booleans for "supported" and "allow override", how about: I think that's a bit easier to understand, and it should be enough information to print what we need:
This output is also clearer to the end user, I think. |
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I also think we need to record the default values anyway, as I'm fairly sure there are a good number of Bash options that default to "on". |
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That sounds better, thanks! :) Also, I agree on:
I briefly mentioned it here #883 (comment), will also include in this PR. |
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@mvdan could you take a look please? I incorporated the feedbacks above. Thanks! |
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Jun 28, 2022
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Trying to set an unsupported but valid Bash option leads to a
potentially confusing error message:
```
$ gosh -c "shopt -s extglob"
shopt: invalid option name "extglob"
```
Fix that by handling the unsupported options differently from the
invalid ones:
```
$ gosh -c "shopt -s extglob"
bash: line 1: shopt: extglob off ("on" not supported)
exit status 1
```
Additionally, this commit lists all of the Bash options when `shopt`
without arguments is called and explicitly identify the unsupported
options, for example:
```
$ gosh -c "shopt"
expand_aliases off
globstar off
nullglob off
// .. cut for brevity
hostcomplete on ("off" not supported)
inherit_errexit on ("off" not supported)
interactive_comments on ("off" not supported)
```
While at it, rewrite the `bashOptsTable` so that it can keep two option
states: 1) Bash's default options and 2) whether we support it
Fixes mvdan#877
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A recent commit, 1eb295c, introduced a regression on Windows. Programs spawned by interp no longer found other programs in PATH. The reason turns out to be because those programs saw a Unix-like PATH, with the list separator being ":" rather than ";", which breaks Windows programs as they see one single mangled directory. The actual source of the bug is much older, from eb75bb8f7d: For better compatibility with non-unix systems, convert $PATH to a unix path list when starting the interpreter. This should work with Windows, for example. The recent commit surfaced the bug by tweaking the environment logic. Before, converting PATH's list separators was an internal detail, but now we also export this change and it affects spawned programs. The added test case fails without the fix: --- FAIL: TestRunnerRun/mvdan#883 (0.19s) interp_test.go:3201: wrong output in "GOSH_CMD=lookpath $GOSH_PROG": want: "cmd found\n" got: "exec: \"cmd\": executable file not found in %PATH%\nexit status 1" The fix is relatively simple: stop converting PATH's list separators. I believe the reason I originally added that code was for compatibility, so that scripts using Unix-like path list separator, such as export PATH="${PATH}:${PWD}" would work as expected on Windows. However, I struggle to agree with my past self on that approach. We had no tests for this behavior, and any script using Unix-like paths in any non-trivial way would likely need to be adjusted to be compatible with Windows anyway. Fixes mvdan#768.
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Trying to set an unsupported but valid Bash option leads to a
potentially confusing error message:
Fix that by handling the unsupported options differently from the
invalid ones:
Additionally, this commit lists all of the Bash options when
shoptwithout arguments is called and explicitly identify the unsupported
options, for example:
While at it, rewrite the
bashOptsTableso that it can keep two optionstates: 1) Bash's default options and 2) whether we support it
Fixes #877