#patch Generated dependency meta data information by processing file (#…

…23)

with respective .json file

go.mod

@@ -5,6 +5,7 @@ go 1.18
 require (
 	github.com/google/uuid v1.3.0
 	github.com/stretchr/testify v1.8.4
+	golang.org/x/mod v0.11.0
 )
 
 require (

go.sum

@@ -6,6 +6,8 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+golang.org/x/mod v0.11.0 h1:bUO06HqtnRcc/7l71XBe4WcqTZ+3AH1J59zWDDwLKgU=
+golang.org/x/mod v0.11.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

goastgen/libgoastgen.go

@@ -5,6 +5,8 @@ import (
 	"go/ast"
 	"go/parser"
 	"go/token"
+	"golang.org/x/mod/modfile"
+	"io/ioutil"
 	"log"
 	"reflect"
 	"unsafe"
@@ -83,6 +85,55 @@ func ParseAstFromFile(file string) (string, error) {
 	return serilizeToJsonStr(result)
 }
 
+// ParseModFromFile
+/*
+ It will parse the .mod file and generate module and dependency information in JSON format
+
+ Parameters:
+  file: absolute file path to be parsed
+
+ Returns:
+  If given file is a valid .mod file then it will generate the module and dependency information in JSON format
+*/
+func ParseModFromFile(file string) (string, error) {
+	objMap := make(map[string]interface{})
+	contents, err := ioutil.ReadFile(file)
+	if err != nil {
+		log.SetPrefix("[ERROR]")
+		log.Printf("Error while processing '%s' \n", file)
+		log.Println(err)
+		return "", err
+	}
+	modFile, err := modfile.Parse(file, contents, nil)
+	if err != nil {
+		log.SetPrefix("[ERROR]")
+		log.Printf("Error while processing '%s' \n", file)
+		log.Println(err)
+		return "", err
+	}
+	objMap["node_filename"] = file
+	module := make(map[string]interface{})
+	module["name"] = modFile.Module.Mod.Path
+	module["node_line_no"] = modFile.Module.Syntax.Start.Line
+	module["node_col_no"] = modFile.Module.Syntax.Start.LineRune
+	module["node_line_no_end"] = modFile.Module.Syntax.End.Line
+	module["node_col_no_end"] = modFile.Module.Syntax.End.LineRune
+	objMap["module"] = module
+	dependencies := []interface{}{}
+	for _, req := range modFile.Require {
+		node := make(map[string]interface{})
+		node["module"] = req.Mod.Path
+		node["version"] = req.Mod.Version
+		node["node_line_no"] = req.Syntax.Start.Line
+		node["node_col_no"] = req.Syntax.Start.LineRune
+		node["node_line_no_end"] = req.Syntax.End.Line
+		node["node_col_no_end"] = req.Syntax.End.LineRune
+		dependencies = append(dependencies, node)
+	}
+	objMap["dependencies"] = dependencies
+	return serilizeToJsonStr(objMap)
+}
+
 /*
  Independent function which handles serialisation of map[string]interface{} in to JSON
 

main.go

@@ -74,6 +74,26 @@ func processRequest(out string, inputPath string) {
 					}
 					return nil
 				}
+			} else if strings.HasSuffix(info.Name(), ".mod") {
+				var outFile = ""
+				directory := filepath.Dir(path)
+				if out == ".ast" {
+					outFile = filepath.Join(inputPath, out, strings.ReplaceAll(directory, inputPath, ""), info.Name()+".json")
+				} else {
+					outFile = filepath.Join(out, strings.ReplaceAll(directory, inputPath, ""), info.Name()+".json")
+				}
+				jsonResult, perr := goastgen.ParseModFromFile(path)
+				if perr != nil {
+					fmt.Printf("Failed to generate AST for %s \n", path)
+				} else {
+					err = writeFileContents(outFile, jsonResult)
+					if err != nil {
+						fmt.Printf("Error writing AST to output location '%s'\n", outFile)
+					} else {
+						fmt.Printf("Converted AST for %s to %s \n", path, outFile)
+					}
+					return nil
+				}
 			}
 			return nil
 		})