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tea/cmd/autocomplete.go

139 lines
3.6 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package cmd
import (
"fmt"
"io"
"net/http"
"os"
"os/exec"
"github.com/adrg/xdg"
"github.com/urfave/cli/v2"
)
// CmdAutocomplete manages autocompletion
var CmdAutocomplete = cli.Command{
Name: "shellcompletion",
Aliases: []string{"autocomplete"},
Category: catSetup,
Usage: "Install shell completion for tea",
Description: "Install shell completion for tea",
ArgsUsage: "<shell type> (bash, zsh, powershell, fish)",
Flags: []cli.Flag{
&cli.BoolFlag{
Name: "install",
Usage: "Persist in shell config instead of printing commands",
},
},
Action: runAutocompleteAdd,
}
func runAutocompleteAdd(ctx *cli.Context) error {
var remoteFile, localFile, cmds string
shell := ctx.Args().First()
switch shell {
case "zsh":
remoteFile = "contrib/autocomplete.zsh"
localFile = "autocomplete.zsh"
cmds = "echo 'PROG=tea _CLI_ZSH_AUTOCOMPLETE_HACK=1 source \"%s\"' >> ~/.zshrc && source ~/.zshrc"
case "bash":
remoteFile = "contrib/autocomplete.sh"
localFile = "autocomplete.sh"
cmds = "echo 'PROG=tea source \"%s\"' >> ~/.bashrc && source ~/.bashrc"
case "powershell":
remoteFile = "contrib/autocomplete.ps1"
localFile = "tea.ps1"
cmds = "\"& %s\" >> $profile"
case "fish":
// fish is different, in that urfave/cli provides a generator for the shell script needed.
// this also means that the fish completion can become out of sync with the tea binary!
// writing to this directory suffices, as fish reads files there on startup, no cmds needed.
return writeFishAutoCompleteFile(ctx)
default:
return fmt.Errorf("Must specify valid %s", ctx.Command.ArgsUsage)
}
localPath, err := xdg.ConfigFile("tea/" + localFile)
if err != nil {
return err
}
cmds = fmt.Sprintf(cmds, localPath)
if err = writeRemoteAutoCompleteFile(remoteFile, localPath); err != nil {
return err
}
if ctx.Bool("install") {
fmt.Println("Installing in your shellrc")
installer := exec.Command(shell, "-c", cmds)
if shell == "powershell" {
installer = exec.Command("powershell.exe", "-Command", cmds)
}
out, err := installer.CombinedOutput()
if err != nil {
return fmt.Errorf("Couldn't run the commands: %s %s", err, out)
}
} else {
fmt.Println("\n# Run the following commands to install autocompletion (or use --install)")
fmt.Println(cmds)
}
return nil
}
func writeRemoteAutoCompleteFile(file, destPath string) error {
url := fmt.Sprintf("https://gitea.com/gitea/tea/raw/branch/master/%s", file)
fmt.Println("Fetching " + url)
res, err := http.Get(url)
if err != nil {
return err
}
defer res.Body.Close()
writer, err := os.Create(destPath)
if err != nil {
return err
}
defer writer.Close()
_, err = io.Copy(writer, res.Body)
return err
}
func writeFishAutoCompleteFile(ctx *cli.Context) error {
// NOTE: to make sure this file is in sync with tea commands, we'd need to
// - check if the file exists
// - if it does, check if the tea version that wrote it is the currently running version
// - if not, rewrite the file
// on each application run
// NOTE: this generates a completion that also suggests file names, which looks kinda messy..
script, err := ctx.App.ToFishCompletion()
if err != nil {
return err
}
localPath, err := xdg.ConfigFile("fish/conf.d/tea_completion.fish")
if err != nil {
return err
}
writer, err := os.Create(localPath)
if err != nil {
return err
}
if _, err = io.WriteString(writer, script); err != nil {
return err
}
fmt.Printf("Installed tab completion to %s\n", localPath)
return nil
}