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package extension
import (
"errors"
"fmt"
"os"
"strings"
"github.com/MakeNowJust/heredoc"
"github.com/cli/cli/v2/git"
"github.com/cli/cli/v2/internal/ghrepo"
"github.com/cli/cli/v2/pkg/cmdutil"
"github.com/cli/cli/v2/pkg/extensions"
"github.com/cli/cli/v2/utils"
"github.com/spf13/cobra"
)
func NewCmdExtension(f *cmdutil.Factory) *cobra.Command {
m := f.ExtensionManager
io := f.IOStreams
extCmd := cobra.Command{
Use: "extension",
Short: "Manage gh extensions",
Long: heredoc.Docf(`
GitHub CLI extensions are repositories that provide additional gh commands.
The name of the extension repository must start with "gh-" and it must contain an
executable of the same name. All arguments passed to the %[1]sgh <extname>%[1]s invocation
will be forwarded to the %[1]sgh-<extname>%[1]s executable of the extension.
An extension cannot override any of the core gh commands.
See the list of available extensions at <https://github.com/topics/gh-extension>
`, "`"),
Aliases: []string{"extensions"},
}
extCmd.AddCommand(
&cobra.Command{
Use: "list",
Short: "List installed extension commands",
Args: cobra.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
cmds := m.List(true)
if len(cmds) == 0 {
return errors.New("no extensions installed")
}
cs := io.ColorScheme()
t := utils.NewTablePrinter(io)
for _, c := range cmds {
var repo string
if u, err := git.ParseURL(c.URL()); err == nil {
if r, err := ghrepo.FromURL(u); err == nil {
repo = ghrepo.FullName(r)
}
}
t.AddField(fmt.Sprintf("gh %s", c.Name()), nil, nil)
t.AddField(repo, nil, nil)
var updateAvailable string
if c.UpdateAvailable() {
updateAvailable = "Upgrade available"
}
t.AddField(updateAvailable, nil, cs.Green)
t.EndRow()
}
return t.Render()
},
},
&cobra.Command{
Use: "install <repository>",
Short: "Install a gh extension from a repository",
Long: heredoc.Doc(`
Install a GitHub repository locally as a GitHub CLI extension.
The repository argument can be specified in "owner/repo" format as well as a full URL.
The URL format is useful when the repository is not hosted on github.com.
To install an extension in development from the current directory, use "." as the
value of the repository argument.
See the list of available extensions at <https://github.com/topics/gh-extension>
`),
Example: heredoc.Doc(`
$ gh extension install owner/gh-extension
$ gh extension install https://git.example.com/owner/gh-extension
$ gh extension install .
`),
Args: cmdutil.MinimumArgs(1, "must specify a repository to install from"),
RunE: func(cmd *cobra.Command, args []string) error {
if args[0] == "." {
wd, err := os.Getwd()
if err != nil {
return err
}
return m.InstallLocal(wd)
}
repo, err := ghrepo.FromFullName(args[0])
if err != nil {
return err
}
if err := checkValidExtension(cmd.Root(), m, repo.RepoName()); err != nil {
return err
}
if err := m.Install(repo); err != nil {
return err
}
if io.IsStdoutTTY() {
cs := io.ColorScheme()
fmt.Fprintf(io.Out, "%s Installed extension %s\n", cs.SuccessIcon(), args[0])
}
return nil
},
},
func() *cobra.Command {
var flagAll bool
var flagForce bool
cmd := &cobra.Command{
Use: "upgrade {<name> | --all}",
Short: "Upgrade installed extensions",
Args: func(cmd *cobra.Command, args []string) error {
if len(args) == 0 && !flagAll {
return cmdutil.FlagErrorf("must specify an extension to upgrade")
}
if len(args) > 0 && flagAll {
return cmdutil.FlagErrorf("cannot use `--all` with extension name")
}
if len(args) > 1 {
return cmdutil.FlagErrorf("too many arguments")
}
return nil
},
RunE: func(cmd *cobra.Command, args []string) error {
var name string
if len(args) > 0 {
name = normalizeExtensionSelector(args[0])
}
cs := io.ColorScheme()
err := m.Upgrade(name, flagForce)
if err != nil {
if name != "" {
fmt.Fprintf(io.ErrOut, "%s Failed upgrading extension %s: %s", cs.FailureIcon(), name, err)
} else {
fmt.Fprintf(io.ErrOut, "%s Failed upgrading extensions", cs.FailureIcon())
}
return cmdutil.SilentError
}
if io.IsStdoutTTY() {
if name != "" {
fmt.Fprintf(io.Out, "%s Successfully upgraded extension %s\n", cs.SuccessIcon(), name)
} else {
fmt.Fprintf(io.Out, "%s Successfully upgraded extensions\n", cs.SuccessIcon())
}
}
return nil
},
}
cmd.Flags().BoolVar(&flagAll, "all", false, "Upgrade all extensions")
cmd.Flags().BoolVar(&flagForce, "force", false, "Force upgrade extension")
return cmd
}(),
&cobra.Command{
Use: "remove <name>",
Short: "Remove an installed extension",
Args: cobra.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
extName := normalizeExtensionSelector(args[0])
if err := m.Remove(extName); err != nil {
return err
}
if io.IsStdoutTTY() {
cs := io.ColorScheme()
fmt.Fprintf(io.Out, "%s Removed extension %s\n", cs.SuccessIcon(), extName)
}
return nil
},
},
&cobra.Command{
Use: "create <name>",
Short: "Create a new extension",
Args: cmdutil.ExactArgs(1, "must specify a name for the extension"),
RunE: func(cmd *cobra.Command, args []string) error {
extName := args[0]
if !strings.HasPrefix(extName, "gh-") {
extName = "gh-" + extName
}
if err := m.Create(extName); err != nil {
return err
}
if !io.IsStdoutTTY() {
return nil
}
link := "https://docs.github.com/github-cli/github-cli/creating-github-cli-extensions"
cs := io.ColorScheme()
out := heredoc.Docf(`
%[1]s Created directory %[2]s
%[1]s Initialized git repository
%[1]s Set up extension scaffolding
%[2]s is ready for development
Install locally with: cd %[2]s && gh extension install .
Publish to GitHub with: gh repo create %[2]s
For more information on writing extensions:
%[3]s
`, cs.SuccessIcon(), extName, link)
fmt.Fprint(io.Out, out)
return nil
},
},
)
return &extCmd
}
func checkValidExtension(rootCmd *cobra.Command, m extensions.ExtensionManager, extName string) error {
if !strings.HasPrefix(extName, "gh-") {
return errors.New("extension repository name must start with `gh-`")
}
commandName := strings.TrimPrefix(extName, "gh-")
if c, _, err := rootCmd.Traverse([]string{commandName}); err != nil {
return err
} else if c != rootCmd {
return fmt.Errorf("%q matches the name of a built-in command", commandName)
}
for _, ext := range m.List(false) {
if ext.Name() == commandName {
return fmt.Errorf("there is already an installed extension that provides the %q command", commandName)
}
}
return nil
}
func normalizeExtensionSelector(n string) string {
if idx := strings.IndexRune(n, '/'); idx >= 0 {
n = n[idx+1:]
}
return strings.TrimPrefix(n, "gh-")
}