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Factor cache-probing logic out of buildfile.commit() and CmdRun().

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Graydon Hoare 2013-12-12 05:33:15 +00:00 • committed by Graydon Hoare
parent 124da338fd
commit 7afd7a82bd
1 changed files with 32 additions and 22 deletions
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54
buildfile.go
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@ -87,6 +87,26 @@ func (b *buildFile) CmdMaintainer(name string) error {
return b.commit("", b.config.Cmd, fmt.Sprintf("MAINTAINER %s", name))
}
// probeCache checks to see if image-caching is enabled (`b.utilizeCache`)
// and if so attempts to look up the current `b.image` and `b.config` pair
// in the current server `b.srv`. If an image is found, probeCache returns
// `(true, nil)`. If no image is found, it returns `(false, nil)`. If there
// is any error, it returns `(false, err)`.
func (b *buildFile) probeCache() (bool, error) {
if b.utilizeCache {
if cache, err := b.srv.ImageGetCached(b.image, b.config); err != nil {
return false, err
} else if cache != nil {
fmt.Fprintf(b.outStream, " ---> Using cache\n")
utils.Debugf("[BUILDER] Use cached version")
b.image = cache.ID
return true, nil
} else {
utils.Debugf("[BUILDER] Cache miss")
}
}
return false, nil
}
func (b *buildFile) CmdRun(args string) error {
if b.image == "" {
return fmt.Errorf("Please provide a source image with `from` prior to run")
@ -104,17 +124,12 @@ func (b *buildFile) CmdRun(args string) error {
utils.Debugf("Command to be executed: %v", b.config.Cmd)
if b.utilizeCache {
if cache, err := b.srv.ImageGetCached(b.image, b.config); err != nil {
return err
} else if cache != nil {
fmt.Fprintf(b.outStream, " ---> Using cache\n")
utils.Debugf("[BUILDER] Use cached version")
b.image = cache.ID
return nil
} else {
utils.Debugf("[BUILDER] Cache miss")
}
hit, err := b.probeCache()
if err != nil {
return err
}
if hit {
return nil
}
cid, err := b.run()
@ -460,17 +475,12 @@ func (b *buildFile) commit(id string, autoCmd []string, comment string) error {
b.config.Cmd = []string{"/bin/sh", "-c", "#(nop) " + comment}
defer func(cmd []string) { b.config.Cmd = cmd }(cmd)
if b.utilizeCache {
if cache, err := b.srv.ImageGetCached(b.image, b.config); err != nil {
return err
} else if cache != nil {
fmt.Fprintf(b.outStream, " ---> Using cache\n")
utils.Debugf("[BUILDER] Use cached version")
b.image = cache.ID
return nil
} else {
utils.Debugf("[BUILDER] Cache miss")
}
hit, err := b.probeCache()
if err != nil {
return err
}
if hit {
return nil
}
container, warnings, err := b.runtime.Create(b.config, "")