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Diffstat (limited to 'vendor/github.com/spf13/cobra/zsh_completions.md')
| -rw-r--r-- | vendor/github.com/spf13/cobra/zsh_completions.md | 87 |
1 files changed, 48 insertions, 39 deletions
diff --git a/vendor/github.com/spf13/cobra/zsh_completions.md b/vendor/github.com/spf13/cobra/zsh_completions.md index df9c2eac9..7cff61787 100644 --- a/vendor/github.com/spf13/cobra/zsh_completions.md +++ b/vendor/github.com/spf13/cobra/zsh_completions.md @@ -1,39 +1,48 @@ -## Generating Zsh Completion for your cobra.Command - -Cobra supports native Zsh completion generated from the root `cobra.Command`. -The generated completion script should be put somewhere in your `$fpath` named -`_<YOUR COMMAND>`. - -### What's Supported - -* Completion for all non-hidden subcommands using their `.Short` description. -* Completion for all non-hidden flags using the following rules: - * Filename completion works by marking the flag with `cmd.MarkFlagFilename...` - family of commands. - * The requirement for argument to the flag is decided by the `.NoOptDefVal` - flag value - if it's empty then completion will expect an argument. - * Flags of one of the various `*Array` and `*Slice` types supports multiple - specifications (with or without argument depending on the specific type). -* Completion of positional arguments using the following rules: - * Argument position for all options below starts at `1`. If argument position - `0` is requested it will raise an error. - * Use `command.MarkZshCompPositionalArgumentFile` to complete filenames. Glob - patterns (e.g. `"*.log"`) are optional - if not specified it will offer to - complete all file types. - * Use `command.MarkZshCompPositionalArgumentWords` to offer specific words for - completion. At least one word is required. - * It's possible to specify completion for some arguments and leave some - unspecified (e.g. offer words for second argument but nothing for first - argument). This will cause no completion for first argument but words - completion for second argument. - * If no argument completion was specified for 1st argument (but optionally was - specified for 2nd) and the command has `ValidArgs` it will be used as - completion options for 1st argument. - * Argument completions only offered for commands with no subcommands. - -### What's not yet Supported - -* Custom completion scripts are not supported yet (We should probably create zsh - specific one, doesn't make sense to re-use the bash one as the functions will - be different). -* Whatever other feature you're looking for and doesn't exist :) +## Generating Zsh Completion For Your cobra.Command + +Please refer to [Shell Completions](shell_completions.md) for details. + +## Zsh completions standardization + +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. + +### Deprecation summary + +See further below for more details on these deprecations. + +* `cmd.MarkZshCompPositionalArgumentFile(pos, []string{})` is no longer needed. It is therefore **deprecated** and silently ignored. +* `cmd.MarkZshCompPositionalArgumentFile(pos, glob[])` is **deprecated** and silently ignored. + * Instead use `ValidArgsFunction` with `ShellCompDirectiveFilterFileExt`. +* `cmd.MarkZshCompPositionalArgumentWords()` is **deprecated** and silently ignored. + * Instead use `ValidArgsFunction`. + +### Behavioral changes + +**Noun completion** +|Old behavior|New behavior| +|---|---| +|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| +|Completion of flag names without the `-` prefix having been typed|Flag names are only completed if the user has typed the first `-`| +`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| +|`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)| +|`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| + +**Flag-value completion** + +|Old behavior|New behavior| +|---|---| +|No file completion by default (opposite of bash)|File completion by default; use `RegisterFlagCompletionFunc()` with `ShellCompDirectiveNoFileComp` to turn off file completion| +|`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| +|`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"}`)| +|`cmd.MarkFlagDirname(flag)` only completes directories (zsh-specific)|Has been added for all shells| +|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`| +|Completion of a flag name does not provide the `=` form (unlike bash)|Retained for `zsh` and added to `fish`| + +**Improvements** + +* Custom completion support (`ValidArgsFunction` and `RegisterFlagCompletionFunc()`) +* File completion by default if no other completions found +* Handling of required flags +* File extension filtering no longer mutually exclusive with bash usage +* Completion of directory names *within* another directory +* Support for `=` form of flags |