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authorEyal Posener <[email protected]>2019-03-07 06:59:58 +0200
committerEyal Posener <[email protected]>2019-03-07 06:59:58 +0200
commitd258bec9b1c6e4c8cf76949b789b9a8b0d5193f8 (patch)
tree812be0e1290c1b2bb5ace0e950d0d63804537e4b /doc.go
parent3ef9b31a6a0613ae832e7ecf208374027c3b2343 (diff)
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+/*
+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 [gocomplete](./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](#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