doc.go

/*
Package complete provides a tool for bash writing bash completion in go, and bash completion for the go command line.

Writing bash completion scripts is a hard work. This package provides an easy way
to create bash completion scripts for any command, and also an easy way to install/uninstall
the completion of the command.

Go Command Bash Completion

In ./cmd/gocomplete there is an example for bash completion for the `go` command line.

This is an example that uses the `complete` package on the `go` command - the `complete` package
can also be used to implement any completions, see #usage.

Install

1. Type in your shell:

	go get -u github.com/posener/complete/gocomplete
	gocomplete -install

2. Restart your shell

Uninstall by `gocomplete -uninstall`

Features

- Complete `go` command, including sub commands and all flags.
- Complete packages names or `.go` files when necessary.
- Complete test names after `-run` flag.

Complete package

Supported shells:

- [x] bash
- [x] zsh
- [x] fish

Usage

Assuming you have program called `run` and you want to have bash completion
for it, meaning, if you type `run` then space, then press the `Tab` key,
the shell will suggest relevant complete options.

In that case, we will create a program called `runcomplete`, a go program,
with a `func main()` and so, that will make the completion of the `run`
program. Once the `runcomplete` will be in a binary form, we could
`runcomplete -install` and that will add to our shell all the bash completion
options for `run`.

So here it is:

	import "github.com/posener/complete"

	func main() {

		// create a Command object, that represents the command we want
		// to complete.
		run := complete.Command{

			// Sub defines a list of sub commands of the program,
			// this is recursive, since every command is of type command also.
			Sub: complete.Commands{

				// add a build sub command
				"build": complete.Command {

					// define flags of the build sub command
					Flags: complete.Flags{
						// build sub command has a flag '-cpus', which
						// expects number of cpus after it. in that case
						// anything could complete this flag.
						"-cpus": complete.PredictAnything,
					},
				},
			},

			// define flags of the 'run' main command
			Flags: complete.Flags{
				// a flag -o, which expects a file ending with .out after
				// it, the tab completion will auto complete for files matching
				// the given pattern.
				"-o": complete.PredictFiles("*.out"),
			},

			// define global flags of the 'run' main command
			// those will show up also when a sub command was entered in the
			// command line
			GlobalFlags: complete.Flags{

				// a flag '-h' which does not expects anything after it
				"-h": complete.PredictNothing,
			},
		}

		// run the command completion, as part of the main() function.
		// this triggers the autocompletion when needed.
		// name must be exactly as the binary that we want to complete.
		complete.New("run", run).Run()
	}

Self completing program

In case that the program that we want to complete is written in go we
can make it self completing.
Here is an example: ./example/self/main.go .

*/
package complete