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* start pulling out + replacing urfave and config * replace many many instances of config * move more stuff => viper * properly remove urfave * move some flags to root command * add testrig commands to root * alias config file keys * start adding cli parsing tests * reorder viper init * remove config path alias * fmt * change config file keys to non-nested * we're more or less in business now * tidy up the common func * go fmt * get tests passing again * add note about the cliparsing tests * reorganize * update docs with changes * structure cmd dir better * rename + move some files around * fix dangling comma
49 lines
3.6 KiB
Markdown
49 lines
3.6 KiB
Markdown
## Generating Zsh Completion For Your cobra.Command
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Please refer to [Shell Completions](shell_completions.md) for details.
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## Zsh completions standardization
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Cobra 1.1 standardized its zsh completion support to align it with its other shell completions. Although the API was kept backwards-compatible, some small changes in behavior were introduced.
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### Deprecation summary
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See further below for more details on these deprecations.
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* `cmd.MarkZshCompPositionalArgumentFile(pos, []string{})` is no longer needed. It is therefore **deprecated** and silently ignored.
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* `cmd.MarkZshCompPositionalArgumentFile(pos, glob[])` is **deprecated** and silently ignored.
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* Instead use `ValidArgsFunction` with `ShellCompDirectiveFilterFileExt`.
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* `cmd.MarkZshCompPositionalArgumentWords()` is **deprecated** and silently ignored.
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* Instead use `ValidArgsFunction`.
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### Behavioral changes
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**Noun completion**
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|Old behavior|New behavior|
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|---|---|
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|No file completion by default (opposite of bash)|File completion by default; use `ValidArgsFunction` with `ShellCompDirectiveNoFileComp` to turn off file completion on a per-argument basis|
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|Completion of flag names without the `-` prefix having been typed|Flag names are only completed if the user has typed the first `-`|
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`cmd.MarkZshCompPositionalArgumentFile(pos, []string{})` used to turn on file completion on a per-argument position basis|File completion for all arguments by default; `cmd.MarkZshCompPositionalArgumentFile()` is **deprecated** and silently ignored|
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|`cmd.MarkZshCompPositionalArgumentFile(pos, glob[])` used to turn on file completion **with glob filtering** on a per-argument position basis (zsh-specific)|`cmd.MarkZshCompPositionalArgumentFile()` is **deprecated** and silently ignored; use `ValidArgsFunction` with `ShellCompDirectiveFilterFileExt` for file **extension** filtering (not full glob filtering)|
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|`cmd.MarkZshCompPositionalArgumentWords(pos, words[])` used to provide completion choices on a per-argument position basis (zsh-specific)|`cmd.MarkZshCompPositionalArgumentWords()` is **deprecated** and silently ignored; use `ValidArgsFunction` to achieve the same behavior|
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**Flag-value completion**
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|Old behavior|New behavior|
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|---|---|
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|No file completion by default (opposite of bash)|File completion by default; use `RegisterFlagCompletionFunc()` with `ShellCompDirectiveNoFileComp` to turn off file completion|
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|`cmd.MarkFlagFilename(flag, []string{})` and similar used to turn on file completion|File completion by default; `cmd.MarkFlagFilename(flag, []string{})` no longer needed in this context and silently ignored|
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|`cmd.MarkFlagFilename(flag, glob[])` used to turn on file completion **with glob filtering** (syntax of `[]string{"*.yaml", "*.yml"}` incompatible with bash)|Will continue to work, however, support for bash syntax is added and should be used instead so as to work for all shells (`[]string{"yaml", "yml"}`)|
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|`cmd.MarkFlagDirname(flag)` only completes directories (zsh-specific)|Has been added for all shells|
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|Completion of a flag name does not repeat, unless flag is of type `*Array` or `*Slice` (not supported by bash)|Retained for `zsh` and added to `fish`|
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|Completion of a flag name does not provide the `=` form (unlike bash)|Retained for `zsh` and added to `fish`|
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**Improvements**
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* Custom completion support (`ValidArgsFunction` and `RegisterFlagCompletionFunc()`)
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* File completion by default if no other completions found
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* Handling of required flags
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* File extension filtering no longer mutually exclusive with bash usage
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* Completion of directory names *within* another directory
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* Support for `=` form of flags
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