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118 lines
3.7 KiB
Markdown
118 lines
3.7 KiB
Markdown
# complete
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A tool for bash writing bash completion in go, and bash completion for the go command line.
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[](https://travis-ci.org/posener/complete)
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[](https://codecov.io/gh/posener/complete)
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[](https://golangci.com/r/github.com/posener/complete)
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[](http://godoc.org/github.com/posener/complete)
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[](https://goreportcard.com/report/github.com/posener/complete)
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Writing bash completion scripts is a hard work. This package provides an easy way
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to create bash completion scripts for any command, and also an easy way to install/uninstall
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the completion of the command.
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## go command bash completion
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In [gocomplete](./gocomplete) there is an example for bash completion for the `go` command line.
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This is an example that uses the `complete` package on the `go` command - the `complete` package
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can also be used to implement any completions, see [Usage](#usage).
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### Install
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1. Type in your shell:
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```
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go get -u github.com/posener/complete/gocomplete
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gocomplete -install
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```
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2. Restart your shell
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Uninstall by `gocomplete -uninstall`
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### Features
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- Complete `go` command, including sub commands and all flags.
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- Complete packages names or `.go` files when necessary.
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- Complete test names after `-run` flag.
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## complete package
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Supported shells:
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- [x] bash
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- [x] zsh
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- [x] fish
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### Usage
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Assuming you have program called `run` and you want to have bash completion
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for it, meaning, if you type `run` then space, then press the `Tab` key,
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the shell will suggest relevant complete options.
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In that case, we will create a program called `runcomplete`, a go program,
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with a `func main()` and so, that will make the completion of the `run`
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program. Once the `runcomplete` will be in a binary form, we could
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`runcomplete -install` and that will add to our shell all the bash completion
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options for `run`.
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So here it is:
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```go
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import "github.com/posener/complete"
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func main() {
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// create a Command object, that represents the command we want
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// to complete.
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run := complete.Command{
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// Sub defines a list of sub commands of the program,
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// this is recursive, since every command is of type command also.
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Sub: complete.Commands{
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// add a build sub command
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"build": complete.Command {
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// define flags of the build sub command
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Flags: complete.Flags{
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// build sub command has a flag '-cpus', which
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// expects number of cpus after it. in that case
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// anything could complete this flag.
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"-cpus": complete.PredictAnything,
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},
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},
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},
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// define flags of the 'run' main command
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Flags: complete.Flags{
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// a flag -o, which expects a file ending with .out after
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// it, the tab completion will auto complete for files matching
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// the given pattern.
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"-o": complete.PredictFiles("*.out"),
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},
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// define global flags of the 'run' main command
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// those will show up also when a sub command was entered in the
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// command line
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GlobalFlags: complete.Flags{
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// a flag '-h' which does not expects anything after it
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"-h": complete.PredictNothing,
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},
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}
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// run the command completion, as part of the main() function.
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// this triggers the autocompletion when needed.
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// name must be exactly as the binary that we want to complete.
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complete.New("run", run).Run()
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}
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```
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### Self completing program
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In case that the program that we want to complete is written in go we
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can make it self completing.
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Here is an [example](./example/self/main.go)
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