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clean.go
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clean.go
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package exp
import (
"fmt"
"gopkg.in/urfave/cli.v1"
"os"
)
func setUpClean() cli.Command {
cmd := cli.Command{
Name: "clean",
Usage: "clean up cache files",
Action: runClean,
Flags: []cli.Flag{
cli.BoolFlag{
Name: "all, a",
Usage: "clean all cache files",
},
// --cache <name> (default .sensorbee-exp-cache)
},
}
return cmd
}
func runClean(c *cli.Context) error {
err := func() (retErr error) {
cache, err := LoadCacheFromFile(cacheInfoFilename)
if err != nil {
return fmt.Errorf("cannot load cache information:%v", err)
}
defer func() {
if err := SaveCacheToFile(cache, cacheInfoFilename); err != nil {
if retErr == nil { // don't overwrite the previous error
retErr = fmt.Errorf("cannot save a cache file: %v", err)
}
}
}()
if err := removeCacheFiles(cache.Outdated); err != nil {
return err
}
cache.Outdated = nil
if !c.Bool("all") {
return nil
}
// TODO: ask if the user really wants to clean all cache files.
if err := removeCacheFiles(cache.Applied); err != nil {
return err
}
cache.Applied = nil
return nil
}()
if err != nil {
return cli.NewExitError(err.Error(), 1)
}
return nil
}
func removeCacheFile(ent *CacheEntry) error {
if ent.NodeName != "" {
if err := os.Remove(CacheFilename(ent)); err != nil {
if !os.IsNotExist(err) {
return fmt.Errorf("cannot remove a cache file '%v': %v", ent.NodeName, err)
}
}
}
for _, name := range ent.States {
if err := os.Remove(StateCacheFilename(ent, name)); err != nil {
if !os.IsNotExist(err) {
return fmt.Errorf("cannot remove a cache file '%v': %v", name, err)
}
}
}
return nil
}
func removeCacheFiles(ents []*CacheEntry) error {
for _, ent := range ents {
if err := removeCacheFile(ent); err != nil {
return err
}
}
return nil
}