You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
3.5 KiB
128 lines
3.5 KiB
package cli
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"path/filepath"
|
|
|
|
"github.com/spf13/cobra"
|
|
)
|
|
|
|
// WriteConfigVals writes a toml file with the given values.
|
|
// It returns an error if writing was impossible.
|
|
func WriteConfigVals(dir string, vals map[string]string) error {
|
|
data := ""
|
|
for k, v := range vals {
|
|
data += fmt.Sprintf("%s = \"%s\"\n", k, v)
|
|
}
|
|
cfile := filepath.Join(dir, "config.toml")
|
|
return ioutil.WriteFile(cfile, []byte(data), 0666)
|
|
}
|
|
|
|
// RunWithArgs executes the given command with the specified command line args
|
|
// and environmental variables set. It returns any error returned from cmd.Execute()
|
|
func RunWithArgs(cmd Executable, args []string, env map[string]string) error {
|
|
oargs := os.Args
|
|
oenv := map[string]string{}
|
|
// defer returns the environment back to normal
|
|
defer func() {
|
|
os.Args = oargs
|
|
for k, v := range oenv {
|
|
os.Setenv(k, v)
|
|
}
|
|
}()
|
|
|
|
// set the args and env how we want them
|
|
os.Args = args
|
|
for k, v := range env {
|
|
// backup old value if there, to restore at end
|
|
oenv[k] = os.Getenv(k)
|
|
err := os.Setenv(k, v)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// and finally run the command
|
|
return cmd.Execute()
|
|
}
|
|
|
|
// RunCaptureWithArgs executes the given command with the specified command
|
|
// line args and environmental variables set. It returns string fields
|
|
// representing output written to stdout and stderr, additionally any error
|
|
// from cmd.Execute() is also returned
|
|
func RunCaptureWithArgs(cmd Executable, args []string, env map[string]string) (stdout, stderr string, err error) {
|
|
oldout, olderr := os.Stdout, os.Stderr // keep backup of the real stdout
|
|
rOut, wOut, _ := os.Pipe()
|
|
rErr, wErr, _ := os.Pipe()
|
|
os.Stdout, os.Stderr = wOut, wErr
|
|
defer func() {
|
|
os.Stdout, os.Stderr = oldout, olderr // restoring the real stdout
|
|
}()
|
|
|
|
// copy the output in a separate goroutine so printing can't block indefinitely
|
|
copyStd := func(reader *os.File) *(chan string) {
|
|
stdC := make(chan string)
|
|
go func() {
|
|
var buf bytes.Buffer
|
|
// io.Copy will end when we call reader.Close() below
|
|
io.Copy(&buf, reader)
|
|
stdC <- buf.String()
|
|
}()
|
|
return &stdC
|
|
}
|
|
outC := copyStd(rOut)
|
|
errC := copyStd(rErr)
|
|
|
|
// now run the command
|
|
err = RunWithArgs(cmd, args, env)
|
|
|
|
// and grab the stdout to return
|
|
wOut.Close()
|
|
wErr.Close()
|
|
stdout = <-*outC
|
|
stderr = <-*errC
|
|
return stdout, stderr, err
|
|
}
|
|
|
|
// NewCompletionCmd returns a cobra.Command that generates bash and zsh
|
|
// completion scripts for the given root command. If hidden is true, the
|
|
// command will not show up in the root command's list of available commands.
|
|
func NewCompletionCmd(rootCmd *cobra.Command, hidden bool) *cobra.Command {
|
|
flagZsh := "zsh"
|
|
cmd := &cobra.Command{
|
|
Use: "completion",
|
|
Short: "Generate shell completion scripts",
|
|
Long: fmt.Sprintf(`Generate Bash and Zsh completion scripts and print them to STDOUT.
|
|
|
|
Once saved to file, a completion script can be loaded in the shell's
|
|
current session as shown:
|
|
|
|
$ . <(%s completion)
|
|
|
|
To configure your bash shell to load completions for each session add to
|
|
your $HOME/.bashrc or $HOME/.profile the following instruction:
|
|
|
|
. <(%s completion)
|
|
`, rootCmd.Use, rootCmd.Use),
|
|
RunE: func(cmd *cobra.Command, _ []string) error {
|
|
zsh, err := cmd.Flags().GetBool(flagZsh)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if zsh {
|
|
return rootCmd.GenZshCompletion(cmd.OutOrStdout())
|
|
}
|
|
return rootCmd.GenBashCompletion(cmd.OutOrStdout())
|
|
},
|
|
Hidden: hidden,
|
|
Args: cobra.NoArgs,
|
|
}
|
|
|
|
cmd.Flags().Bool(flagZsh, false, "Generate Zsh completion script")
|
|
|
|
return cmd
|
|
}
|