func importsOfFile()

in mockgen/parse.go [553:610]
52 lines of code
11 McCabe index (conditional complexity)

func importsOfFile(file *ast.File) (normalImports map[string]importedPackage, dotImports []string) {
	var importPaths []string
	for _, is := range file.Imports {
		if is.Name != nil {
			continue
		}
		importPath := is.Path.Value[1 : len(is.Path.Value)-1] // remove quotes
		importPaths = append(importPaths, importPath)
	}
	packagesName := createPackageMap(importPaths)
	normalImports = make(map[string]importedPackage)
	dotImports = make([]string, 0)
	for _, is := range file.Imports {
		var pkgName string
		importPath := is.Path.Value[1 : len(is.Path.Value)-1] // remove quotes

		if is.Name != nil {
			// Named imports are always certain.
			if is.Name.Name == "_" {
				continue
			}
			pkgName = is.Name.Name
		} else {
			pkg, ok := packagesName[importPath]
			if !ok {
				// Fallback to import path suffix. Note that this is uncertain.
				_, last := path.Split(importPath)
				// If the last path component has dots, the first dot-delimited
				// field is used as the name.
				pkgName = strings.SplitN(last, ".", 2)[0]
			} else {
				pkgName = pkg
			}
		}

		if pkgName == "." {
			dotImports = append(dotImports, importPath)
		} else {
			if pkg, ok := normalImports[pkgName]; ok {
				switch p := pkg.(type) {
				case duplicateImport:
					normalImports[pkgName] = duplicateImport{
						name:       p.name,
						duplicates: append([]string{importPath}, p.duplicates...),
					}
				case importedPkg:
					normalImports[pkgName] = duplicateImport{
						name:       pkgName,
						duplicates: []string{p.path, importPath},
					}
				}
			} else {
				normalImports[pkgName] = importedPkg{path: importPath}
			}
		}
	}
	return
}