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Support PathFlag.TakesFile in fish completion #1198

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merged 5 commits into from Oct 31, 2020

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@ErinCall
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@ErinCall ErinCall commented Oct 13, 2020

What type of PR is this?

  • bug
  • cleanup
  • documentation
  • feature

What this PR does / why we need it:

Flags of type PathFlag weren't processed correctly when generating fish completions—the generated complete command told fish that the flag doesn't take a filename, even when TakesFile is true.

  • fish.go now respects the TakesFile field, regardless of the flag's underlying type.
    • The first commit on this branch (5bb54ac) is a simpler solution to the original bug: it simply appends PathFlag to the list of explicit types in the switch statement.
    • The second commit refactors the switch statement, using reflection rather than explicit list of types. It's more flexible, but possibly harder to follow. I added some comments to offset that caveat, but I won't complain if you prefer the simpler design.
  • fish_test.go has a test case for a PathFlag with TakesFile = true.
  • expected-fish-full.fish has a corresponding change in its fixture data.

Which issue(s) this PR fixes:

Fixes #1156

Special notes for your reviewer:

@lynncyrin had suggested a lighter-weight form of reflection, but I wasn't able to make the type assertion work. AFAIK go's type system only deals in interfaces and specific, concrete types.

Release Notes

fish completion now respects TakesFile on PathFlags
ErinCall added 3 commits Jun 23, 2020
Performing reflection on the given flag ensures that fishAddFileFlag
will behave correctly if any flag types get a TakesFile field in the
future.
@ErinCall ErinCall requested a review from urfave/cli as a code owner Oct 13, 2020
@ErinCall ErinCall requested review from saschagrunert and rliebz and removed request for urfave/cli Oct 13, 2020
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@saschagrunert saschagrunert left a comment

Nice, LGTM

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@rliebz rliebz left a comment

Thanks for putting this together!

Left a couple comments with some options for how to go forward. Feel free to head down either path.

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ErinCall added 2 commits Oct 22, 2020
This reverts commit fcce511.
@rliebz
rliebz approved these changes Oct 22, 2020
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@asahasrabuddhe asahasrabuddhe left a comment

LGTM

@rliebz rliebz merged commit 3be15f7 into urfave:master Oct 31, 2020
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codecov/patch 100.00% of diff hit (target 71.61%)
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codecov/project 71.75% (+0.14%) compared to e062e73
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4 participants