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log.go
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log.go
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package command
import (
"context"
"fmt"
"io"
"os"
"os/exec"
"strings"
"github.com/spf13/cobra"
)
type logCli struct {
listOptions []string
fzfOption string
}
const (
logFzfPreviewCommand = "git show --color {{.objectRange}} {{.path}}"
)
func NewLogSubcommand() *cobra.Command {
return &cobra.Command{
Use: "log [<commit>[..<commit>]] [-- <git options>]",
Short: "git log with fzf",
Args: cobra.MaximumNArgs(100),
RunE: func(cmd *cobra.Command, args []string) error {
flags := cmd.Flags()
fzfQuery, err := flags.GetString("query")
if err != nil {
return err
}
cli, err := newLogCli(args, fzfQuery)
if err != nil {
return err
}
if err := cli.Run(context.Background(), os.Stdin, os.Stdout, os.Stderr); err != nil {
return err
}
return nil
},
}
}
func newLogCli(gitOptions []string, fzfQuery string) (*logCli, error) {
gitObjectRange := ""
if len(gitOptions) > 0 {
// gitObjectRange may not have ..<commit>
gitObjectRange = gitOptions[0]
}
previewCommand, err := commandFromTemplate("preview", logFzfPreviewCommand, map[string]interface{}{
"path": "{1}",
"objectRange": gitObjectRange,
})
if err != nil {
return nil, fmt.Errorf("invalid fzf preview command: %w", err)
}
fzfOption, err := getFzfOption(previewCommand)
if err != nil {
return nil, fmt.Errorf("failed to get fzf option: %w", err)
}
if fzfQuery != "" {
fzfOption = fzfOption + " --query " + fzfQuery
}
return &logCli{
listOptions: gitOptions,
fzfOption: fzfOption,
}, nil
}
func (c logCli) Run(ctx context.Context, ioIn io.Reader, ioOut io.Writer, ioErr io.Writer) error {
command := fmt.Sprintf("git log --color --oneline %s | fzf %s", strings.Join(c.listOptions, " "), c.fzfOption)
out, err := runCommandWithFzf(ctx, command, ioIn, ioErr)
if err != nil {
if exitErr, ok := err.(*exec.ExitError); ok {
// Script canceled by Ctrl-c
// Only for bash?: http://tldp.org/LDP/abs/html/exitcodes.html
if exitErr.ExitCode() == 130 {
return nil
}
}
return fmt.Errorf("failed to run the command %s: %w", command, err)
}
if err := writeFzfResult(ioOut, out, 0); err != nil {
return err
}
return nil
}