Derive the package from given files

Move some utility functions into the helper

analyzer.go

@@ -28,8 +28,6 @@ import (
 	"regexp"
 	"strings"
 
-	"path/filepath"
-
 	"golang.org/x/tools/go/loader"
 )
 
@@ -106,11 +104,8 @@ func (gosec *Analyzer) Process(buildTags []string, packagePaths ...string) error
 		AllowErrors: true,
 	}
 	for _, packagePath := range packagePaths {
-		abspath, err := filepath.Abs(packagePath)
+		abspath, err := GetPkgAbsPath(packagePath)
 		if err != nil {
-			return err
-		}
-		if _, err := os.Stat(abspath); os.IsNotExist(err) {
 			gosec.logger.Printf("Skipping: %s. Path doesn't exist.", abspath)
 			continue
 		}

cmd/gosec/main.go

@@ -20,10 +20,8 @@ import (
 	"io/ioutil"
 	"log"
 	"os"
-	"os/user"
 	"path/filepath"
 	"regexp"
-	"runtime"
 	"sort"
 	"strings"
 
@@ -178,36 +176,13 @@ func saveOutput(filename, format string, issues []*gosec.Issue, metrics *gosec.M
 	return nil
 }
 
-func getenv(key, userDefault string) string {
-	if val := os.Getenv(key); val != "" {
-		return val
-	}
-	return userDefault
-}
-
-func gopath() []string {
-	defaultGoPath := runtime.GOROOT()
-	if u, err := user.Current(); err == nil {
-		defaultGoPath = filepath.Join(u.HomeDir, "go")
-	}
-	path := getenv("GOPATH", defaultGoPath)
-	paths := strings.Split(path, string(os.PathListSeparator))
-	for idx, path := range paths {
-		if abs, err := filepath.Abs(path); err == nil {
-			paths[idx] = abs
-		}
-	}
-	return paths
-}
-
-func cleanPath(path string, gopaths []string) (string, error) {
-
+func cleanPath(path string) (string, error) {
 	cleanFailed := fmt.Errorf("%s is not within the $GOPATH and cannot be processed", path)
 	nonRecursivePath := strings.TrimSuffix(path, "/...")
 	// do not attempt to clean directs that are resolvable on gopath
 	if _, err := os.Stat(nonRecursivePath); err != nil && os.IsNotExist(err) {
 		log.Printf("directory %s doesn't exist, checking if is a package on $GOPATH", path)
-		for _, basedir := range gopaths {
+		for _, basedir := range gosec.Gopath() {
 			dir := filepath.Join(basedir, "src", nonRecursivePath)
 			if st, err := os.Stat(dir); err == nil && st.IsDir() {
 				log.Printf("located %s in %s", path, dir)
@@ -218,24 +193,17 @@ func cleanPath(path string, gopaths []string) (string, error) {
 	}
 
 	// ensure we resolve package directory correctly based on $GOPATH
-	abspath, err := filepath.Abs(path)
+	pkgPath, err := gosec.GetPkgRelativePath(path)
 	if err != nil {
-		abspath = path
+		return "", cleanFailed
 	}
-	for _, base := range gopaths {
-		projectRoot := filepath.FromSlash(fmt.Sprintf("%s/src/", base))
-		if strings.HasPrefix(abspath, projectRoot) {
-			return strings.TrimPrefix(abspath, projectRoot), nil
-		}
-	}
-	return "", cleanFailed
+	return pkgPath, nil
 }
 
 func cleanPaths(paths []string) []string {
-	gopaths := gopath()
 	var clean []string
 	for _, path := range paths {
-		cleaned, err := cleanPath(path, gopaths)
+		cleaned, err := cleanPath(path)
 		if err != nil {
 			log.Fatal(err)
 		}
@@ -306,7 +274,7 @@ func main() {
 
 	var packages []string
 	// Iterate over packages on the import paths
-	gopaths := gopath()
+	gopaths := gosec.Gopath()
 	for _, pkg := range gotool.ImportPaths(cleanPaths(flag.Args())) {
 
 		// Skip vendor directory

helpers.go

@@ -15,11 +15,17 @@
 package gosec
 
 import (
+	"errors"
 	"fmt"
 	"go/ast"
 	"go/token"
 	"go/types"
+	"os"
+	"os/user"
+	"path/filepath"
+	"runtime"
 	"strconv"
+	"strings"
 )
 
 // MatchCallByPackage ensures that the specified package is imported,
@@ -193,3 +199,60 @@ func GetLocation(n ast.Node, ctx *Context) (string, int) {
 	fobj := ctx.FileSet.File(n.Pos())
 	return fobj.Name(), fobj.Line(n.Pos())
 }
+
+// Gopath returns all GOPATHs
+func Gopath() []string {
+	defaultGoPath := runtime.GOROOT()
+	if u, err := user.Current(); err == nil {
+		defaultGoPath = filepath.Join(u.HomeDir, "go")
+	}
+	path := Getenv("GOPATH", defaultGoPath)
+	paths := strings.Split(path, string(os.PathListSeparator))
+	for idx, path := range paths {
+		if abs, err := filepath.Abs(path); err == nil {
+			paths[idx] = abs
+		}
+	}
+	return paths
+}
+
+// Getenv returns the values of the environment variable, otherwise
+//returns the default if variable is not set
+func Getenv(key, userDefault string) string {
+	if val := os.Getenv(key); val != "" {
+		return val
+	}
+	return userDefault
+}
+
+// GetPkgRelativePath returns the Go relative relative path derived
+// form the given path
+func GetPkgRelativePath(path string) (string, error) {
+	abspath, err := filepath.Abs(path)
+	if err != nil {
+		abspath = path
+	}
+	if strings.HasSuffix(abspath, ".go") {
+		abspath = filepath.Dir(abspath)
+	}
+	for _, base := range Gopath() {
+		projectRoot := filepath.FromSlash(fmt.Sprintf("%s/src/", base))
+		if strings.HasPrefix(abspath, projectRoot) {
+			return strings.TrimPrefix(abspath, projectRoot), nil
+		}
+	}
+	return "", errors.New("no project relative path found")
+}
+
+// GetPkgAbsPath returns the Go package absolute path derived from
+// the given path
+func GetPkgAbsPath(pkgPath string) (string, error) {
+	absPath, err := filepath.Abs(pkgPath)
+	if err != nil {
+		return "", err
+	}
+	if _, err := os.Stat(absPath); os.IsNotExist(err) {
+		return "", errors.New("no project absolute path found")
+	}
+	return absPath, nil
+}