/
package.go
106 lines (94 loc) · 2.54 KB
/
package.go
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package prelviz
import (
"go/ast"
"go/parser"
"go/token"
"os"
"path/filepath"
"strings"
"github.com/samber/lo"
)
type PackageInfo struct {
Name string
DirectoryPath string
ImportUsageMap map[string]map[string]struct{}
}
type PackageInfoMap map[string]*PackageInfo
func NewPackageInfoMap(projectDirectoryPath string) (map[string]*PackageInfo, error) {
filePaths, err := targetGoFilePaths(projectDirectoryPath)
if err != nil {
return nil, err
}
packageInfoMap := make(map[string]*PackageInfo)
for _, filePath := range filePaths {
var packageInfo *PackageInfo
packageInfo, err = NewPackageInfo(filePath, projectDirectoryPath)
if err != nil {
return nil, err
}
if info, ok := packageInfoMap[packageInfo.DirectoryPath]; ok {
info.ImportUsageMap = lo.Assign(info.ImportUsageMap, packageInfo.ImportUsageMap)
} else {
packageInfoMap[packageInfo.DirectoryPath] = packageInfo
}
}
return packageInfoMap, nil
}
func NewPackageInfo(filePath, projectDirectoryPath string) (*PackageInfo, error) {
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, filePath, nil, 0)
if err != nil {
return nil, err
}
importUsageMap := make(map[string]map[string]struct{})
importUsageNameMap := make(map[string]string)
ast.Inspect(f, func(n ast.Node) bool {
switch x := n.(type) {
case *ast.ImportSpec:
importPath := strings.Trim(x.Path.Value, `"`)
if x.Name != nil {
importUsageNameMap[x.Name.Name] = importPath
} else {
importUsageNameMap[filepath.Base(importPath)] = importPath
}
case *ast.SelectorExpr:
xIndent, ok := x.X.(*ast.Ident)
if !ok {
return true
}
var importPath string
if importPath, ok = importUsageNameMap[xIndent.Name]; ok {
if _, ok = importUsageMap[importPath]; ok {
importUsageMap[importPath][x.Sel.Name] = struct{}{}
} else {
importUsageMap[importPath] = map[string]struct{}{x.Sel.Name: {}}
}
}
}
return true
})
relativeFilePath, err := filepath.Rel(projectDirectoryPath, filePath)
if err != nil {
return nil, err
}
return &PackageInfo{
Name: f.Name.Name,
ImportUsageMap: importUsageMap,
DirectoryPath: filepath.Dir(relativeFilePath),
}, nil
}
func targetGoFilePaths(dir string) ([]string, error) {
filePaths := make([]string, 0)
if err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if strings.HasSuffix(path, "_test.go") {
return nil
}
if strings.HasSuffix(path, ".go") {
filePaths = append(filePaths, path)
}
return nil
}); err != nil {
return nil, err
}
return filePaths, nil
}