// DiffPackages takes two packages to produce the changes between them.
func DiffPackages(pkg1, pkg2 *Package) PackageChanges {
diff := PackageChanges{
Before: pkg1,
After: pkg2,
Changes: map[ObjectCategory]map[string]Change{
ObjectCategoryFunc: {},
ObjectCategoryType: {},
ObjectCategoryValue: {},
},
}
for _, name := range util.SortedStringSet(util.MapKeys(pkg1.Funcs), util.MapKeys(pkg2.Funcs)) {
Debugf("%q", name)
diff.Changes[ObjectCategoryFunc][name] = FuncChange{
Before: pkg1.Funcs[name],
After: pkg2.Funcs[name],
}
}
for _, name := range util.SortedStringSet(util.MapKeys(pkg1.Types), util.MapKeys(pkg2.Types)) {
type1 := pkg1.Types[name]
type2 := pkg2.Types[name]
diff.Changes[ObjectCategoryType][name] = TypeChange{
Before: pkg1.Types[name],
After: pkg2.Types[name],
}
if type1 != nil && type2 != nil {
for _, fname := range util.SortedStringSet(util.MapKeys(type1.Funcs), util.MapKeys(type2.Funcs)) {
diff.Changes[ObjectCategoryFunc][fname] = FuncChange{
Before: type1.Funcs[fname],
After: type2.Funcs[fname],
}
}
for _, mname := range util.SortedStringSet(util.MapKeys(type1.Methods), util.MapKeys(type2.Methods)) {
diff.Changes[ObjectCategoryFunc][name+"."+mname] = FuncChange{
Before: type1.Methods[mname],
After: type2.Methods[mname],
}
}
}
}
for _, name := range util.SortedStringSet(util.MapKeys(pkg1.Values), util.MapKeys(pkg2.Values)) {
Debugf("%q", name)
diff.Changes[ObjectCategoryValue][name] = ValueChange{
Before: pkg1.Values[name],
After: pkg2.Values[name],
}
}
return diff
}
func main() {
var (
flagAll = flag.Bool("a", false, "show also unchanged APIs")
flagRecurse = flag.Bool("r", false, `recurse into subdirectories (can be specified by "/..." suffix to the import path)`)
flagDiff = flag.Bool("d", false, "run diff on multi-line changes")
)
flag.Parse()
flag.Usage = usage
args := flag.Args()
if len(args) < 1 {
usage()
}
// TODO: support mercurial and other vcs
vcsType := "git"
revs := strings.SplitN(args[0], "..", 2)
if len(revs) == 1 {
revs = []string{revs[0] + "~1", revs[0]}
} else if revs[1] == "" {
revs = []string{revs[0], ""}
}
path := "."
if len(args) >= 2 {
path = args[1]
if strings.HasSuffix(path, "...") {
path = strings.TrimSuffix(path, "...")
*flagRecurse = true
}
}
dir1, err := gompatible.NewDirSpec(path, vcsType, revs[0])
dieIf(err)
pkgs1, err := gompatible.LoadDir(dir1, *flagRecurse)
dieIf(err)
dir2, err := gompatible.NewDirSpec(path, vcsType, revs[1])
dieIf(err)
pkgs2, err := gompatible.LoadDir(dir2, *flagRecurse)
dieIf(err)
diffs := map[string]gompatible.PackageChanges{}
for _, name := range util.SortedStringSet(util.MapKeys(pkgs1), util.MapKeys(pkgs2)) {
diffs[name] = gompatible.DiffPackages(
pkgs1[name], pkgs2[name],
)
}
var packageIndex int
var hasBreaking bool
for _, name := range util.SortedStringSet(util.MapKeys(diffs)) {
diff := diffs[name]
var headerShown bool
printHeader := func() {
if *flagRecurse == false {
return
}
if !headerShown {
// FIXME strictly not a package if inspecting local import
if packageIndex > 0 {
fmt.Println()
}
fmt.Printf("package %s\n", name)
headerShown = true
packageIndex++
}
}
funcs := diff.Funcs()
for _, name := range util.SortedStringSet(util.MapKeys(funcs)) {
change := funcs[name]
if *flagAll || change.Kind() != gompatible.ChangeUnchanged {
printHeader()
printChange(change, *flagDiff)
}
if change.Kind() == gompatible.ChangeBreaking || change.Kind() == gompatible.ChangeRemoved {
hasBreaking = true
}
}
types := diff.Types()
for _, name := range util.SortedStringSet(util.MapKeys(types)) {
change := types[name]
if *flagAll || change.Kind() != gompatible.ChangeUnchanged {
printHeader()
printChange(change, *flagDiff)
}
if change.Kind() == gompatible.ChangeBreaking || change.Kind() == gompatible.ChangeRemoved {
hasBreaking = true
}
}
values := diff.Values()
for _, name := range util.SortedStringSet(util.MapKeys(values)) {
change := values[name]
if *flagAll || change.Kind() != gompatible.ChangeUnchanged {
printHeader()
printChange(change, *flagDiff)
}
if change.Kind() == gompatible.ChangeBreaking || change.Kind() == gompatible.ChangeRemoved {
hasBreaking = true
}
}
}
if hasBreaking {
os.Exit(1)
}
}
