efritz/ij

package subcommand

import (
    "fmt"
    "os"
    "path/filepath"
    "sort"

    "github.com/efritz/ij/config"
    "github.com/efritz/ij/options"
    "github.com/efritz/ij/paths"
    "github.com/efritz/ij/scratch"
)

func NewRotateLogsCommand(appOptions *options.AppOptions) CommandRunner {
    return func(config *config.Config) error {
        scratchPath := filepath.Join(
            appOptions.ScratchRoot,
            scratch.ScratchDir,
        )

        entries, err := paths.DirContents(scratchPath)
        if err != nil {
            return fmt.Errorf(
                "failed to read scratch directory: %s",
                err.Error(),
            )
        }

        if len(entries) == 0 {
            return nil
        }

        sort.Slice(entries, func(i, j int) bool {
            return entries[i].ModTime().After(entries[j].ModTime())
        })

        for _, info := range entries[1:] {
            if err := os.RemoveAll(filepath.Join(scratchPath, info.Name())); err != nil {
                return fmt.Errorf(
                    "failed to delete run directory: %s",
                    err.Error(),
                )
            }
        }

        return nil
    }
}