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compiler: use hash calculation for determining archive staleness #805

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compiler: use hash calculation for determining archive staleness #805

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e807fdb
compiler: use hash calculation for determining staleness
myitcv Apr 23, 2018
e615455
Add --bv flag to test to log verbose build context messages
myitcv Apr 23, 2018
69257f7
Add build tags to the hash
myitcv Apr 23, 2018
f6baa10
More readable version of hash for debug purposes
myitcv Apr 23, 2018
41c38df
Fix file closing
myitcv Apr 23, 2018
d73d4bb
Address feedback from hajimehoshi
myitcv Apr 23, 2018
9c06cba
Refactor to prefer defers for Close
myitcv Apr 23, 2018
82f8b60
Further refactor to use defer for close
myitcv Apr 23, 2018
2e40249
Use better key name for gopherjs binary hash
myitcv Apr 23, 2018
3d5665a
Move compiler hash calc to init phase
myitcv Apr 24, 2018
5c358e3
Remove --bv flag on test
myitcv Apr 24, 2018
1ed4e6a
Add basic test of new hash staleness
myitcv Apr 28, 2018
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Use better key name for gopherjs binary hash
  • Loading branch information
@myitcv
myitcv committed May 4, 2018
commit 2e40249573de2aafe2a88d200ac517563c44d11e
51 changes: 31 additions & 20 deletions build/build.go
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Original file line number Diff line number Diff line change
Expand Up @@ -596,6 +596,32 @@ const (
hashDebug = false
)

var (
gopherJsBinaryHash string
)

func hashGopherJsBinary() (string, error) {
if gopherJsBinaryHash != "" {
return gopherJsBinaryHash, nil
}

binHash := sha256.New()
binPath, err := os.Executable()
if err != nil {
return "", fmt.Errorf("could not locate GopherJS binary: %v", err)
}
binFile, err := os.Open(binPath)
if err != nil {
return "", fmt.Errorf("could not open %v: %v", binPath, err)
}
defer binFile.Close()
if _, err := io.Copy(binHash, binFile); err != nil {
return "", fmt.Errorf("failed to hash %v: %v", binPath, err)
}
gopherJsBinaryHash = fmt.Sprintf("%#x", binHash.Sum(nil))
return gopherJsBinaryHash, nil
}

func (s *Session) BuildPackage(pkg *PackageData) (*compiler.Archive, error) {
if archive, ok := s.Archives[pkg.ImportPath]; ok {
return archive, nil
Expand All @@ -605,7 +631,7 @@ func (s *Session) BuildPackage(pkg *PackageData) (*compiler.Archive, error) {
// determine staleness. Set hashDebug to see this in action. The format is:
//
// ## sync
// gopherjs bin: 0x519d22c6ab65a950f5b6278e4d65cb75dbd3a7eb1cf16e976a40b9f1febc0446
// gopherjs binary hash: 0x519d22c6ab65a950f5b6278e4d65cb75dbd3a7eb1cf16e976a40b9f1febc0446
// build tags:
// import: internal/race
// hash: 0xb966d7680c1c8ca75026f993c153aff0102dc9551f314e5352043187b5f9c9a6
Expand All @@ -627,28 +653,13 @@ func (s *Session) BuildPackage(pkg *PackageData) (*compiler.Archive, error) {
if pkg.PkgObj != "" {
fmt.Fprintf(hw, "## %v\n", pkg.ImportPath)

hashBin := func() error {
binHash := sha256.New()
binPath, err := os.Executable()
if err != nil {
return fmt.Errorf("could not locate GopherJS binary: %v", err)
}
binFile, err := os.Open(binPath)
if err != nil {
return fmt.Errorf("could not open %v: %v", binPath, err)
}
defer binFile.Close()
if _, err := io.Copy(binHash, binFile); err != nil {
return fmt.Errorf("failed to hash %v: %v", binPath, err)
}
fmt.Fprintf(hw, "gopherjs bin: %#x\n", binHash.Sum(nil))
return nil
}

if err := hashBin(); err != nil {
binHash, err := hashGopherJsBinary()
if err != nil {
return nil, err
}

fmt.Fprintf(hw, "gopherjs binary hash: %v\n", binHash)

orderedBuildTags := append([]string{}, s.options.BuildTags...)
sort.Strings(orderedBuildTags)

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