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Copy pathnodot.go
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194 lines (157 loc) · 4.11 KB
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package nodot
import (
"fmt"
"go/ast"
"go/build"
"go/parser"
"go/token"
"path/filepath"
"strings"
)
func ApplyNoDot(data []byte) ([]byte, error) {
sections, err := generateNodotSections()
if err != nil {
return nil, err
}
for _, section := range sections {
data = section.createOrUpdateIn(data)
}
return data, nil
}
type nodotSection struct {
name string
pkg string
declarations []string
types []string
}
func (s nodotSection) createOrUpdateIn(data []byte) []byte {
renames := map[string]string{}
contents := string(data)
lines := strings.Split(contents, "\n")
comment := "// Declarations for " + s.name
newLines := []string{}
for _, line := range lines {
if line == comment {
continue
}
words := strings.Split(line, " ")
lastWord := words[len(words)-1]
if s.containsDeclarationOrType(lastWord) {
renames[lastWord] = words[1]
continue
}
newLines = append(newLines, line)
}
if len(newLines[len(newLines)-1]) > 0 {
newLines = append(newLines, "")
}
newLines = append(newLines, comment)
for _, typ := range s.types {
name, ok := renames[s.prefix(typ)]
if !ok {
name = typ
}
newLines = append(newLines, fmt.Sprintf("type %s %s", name, s.prefix(typ)))
}
for _, decl := range s.declarations {
name, ok := renames[s.prefix(decl)]
if !ok {
name = decl
}
newLines = append(newLines, fmt.Sprintf("var %s = %s", name, s.prefix(decl)))
}
newLines = append(newLines, "")
newContents := strings.Join(newLines, "\n")
return []byte(newContents)
}
func (s nodotSection) prefix(declOrType string) string {
return s.pkg + "." + declOrType
}
func (s nodotSection) containsDeclarationOrType(word string) bool {
for _, declaration := range s.declarations {
if s.prefix(declaration) == word {
return true
}
}
for _, typ := range s.types {
if s.prefix(typ) == word {
return true
}
}
return false
}
func generateNodotSections() ([]nodotSection, error) {
sections := []nodotSection{}
declarations, err := getExportedDeclerationsForPackage("github.com/onsi/ginkgo", "ginkgo_dsl.go", "GINKGO_VERSION", "GINKGO_PANIC")
if err != nil {
return nil, err
}
sections = append(sections, nodotSection{
name: "Ginkgo DSL",
pkg: "ginkgo",
declarations: declarations,
types: []string{"Done", "Benchmarker"},
})
declarations, err = getExportedDeclerationsForPackage("github.com/onsi/gomega", "gomega.go", "GOMEGA_VERSION")
if err != nil {
return nil, err
}
sections = append(sections, nodotSection{
name: "Gomega DSL",
pkg: "gomega",
declarations: declarations,
})
declarations, err = getExportedDeclerationsForPackage("github.com/onsi/gomega", "matchers.go")
if err != nil {
return nil, err
}
sections = append(sections, nodotSection{
name: "Gomega Matchers",
pkg: "gomega",
declarations: declarations,
})
return sections, nil
}
func getExportedDeclerationsForPackage(pkgPath string, filename string, blacklist ...string) ([]string, error) {
pkg, err := build.Import(pkgPath, ".", 0)
if err != nil {
return []string{}, err
}
declarations, err := getExportedDeclarationsForFile(filepath.Join(pkg.Dir, filename))
if err != nil {
return []string{}, err
}
blacklistLookup := map[string]bool{}
for _, declaration := range blacklist {
blacklistLookup[declaration] = true
}
filteredDeclarations := []string{}
for _, declaration := range declarations {
if blacklistLookup[declaration] {
continue
}
filteredDeclarations = append(filteredDeclarations, declaration)
}
return filteredDeclarations, nil
}
func getExportedDeclarationsForFile(path string) ([]string, error) {
fset := token.NewFileSet()
tree, err := parser.ParseFile(fset, path, nil, 0)
if err != nil {
return []string{}, err
}
declarations := []string{}
ast.FileExports(tree)
for _, decl := range tree.Decls {
switch x := decl.(type) {
case *ast.GenDecl:
switch s := x.Specs[0].(type) {
case *ast.ValueSpec:
declarations = append(declarations, s.Names[0].Name)
}
case *ast.FuncDecl:
declarations = append(declarations, x.Name.Name)
}
}
return declarations, nil
}