Fix usage of the tool in "-mod=vendor" mode for projects with indirect dependencies

.gitignore

@@ -1 +1,3 @@
 vendor
+.vscode
+.idea

.travis.yml

@@ -6,6 +6,8 @@ go:
   - 1.9.x
   - 1.10.x
   - 1.11.x
+  - 1.12.x
+  - 1.13.x
   - tip
 
 matrix:
@@ -17,11 +19,11 @@ os:
   - osx
 
 install:
-  - go mod download || go get -u
+  - env GO111MODULE=on go mod download || go get -u
 
 before_script:
-  - if [[ "$(go version)" =~ "go version go1.8" ]]; then echo Skipping golangci-lint; else make lint-prepare; fi
+  - if [[ "$TRAVIS_GO_VERSION" =~ ^1\.8 ]]; then echo 'Skipping golangci-lint install'; else make lint-prepare; fi
 
 script:
-  - if [[ "$(go version)" =~ "go version go1.8" ]]; then echo Skipping golangci-lint; else make lint; fi
-  - make test
+  - if [[ "$TRAVIS_GO_VERSION" =~ ^1\.8 ]]; then echo 'Skipping golangci-lint run'; else env GO111MODULE=on make lint; fi
+  - env GO111MODULE=on make test

Makefile

@@ -2,12 +2,27 @@ PACKAGE := $(shell go list)
 GOOS := $(shell go env GOOS)
 GOARCH = $(shell go env GOARCH)
 OBJ_DIR := $(GOPATH)/pkg/$(GOOS)_$(GOARCH)/$(PACKAGE)
+GO_VERSION_MINOR := $(shell go version | sed -E 's/.*go([0-9]\.[0-9]+).*/\1/g')
+TRAVIS_GO_VERSION ?= $(GO_VERSION_MINOR).x
+
+GOLANGCI_LINT_1.9.x := v1.10.2
+GOLANGCI_LINT_1.10.x := v1.15.0
+GOLANGCI_LINT_1.11.x := v1.17.1
+GOLANGCI_LINT_1.12.x := v1.19.1
+GOLANGCI_LINT_1.13.x := v1.19.1
+GOLANGCI_LINT_tip := v1.19.1
+GOLANGCI_LINT := ${GOLANGCI_LINT_${TRAVIS_GO_VERSION}}
 
 # Linter
 .PHONY: lint-prepare
 lint-prepare:
-	@echo "Installing golangci-lint"
-	@go get -u github.com/golangci/golangci-lint/cmd/golangci-lint
+	@if [ $(GOLANGCI_LINT) == "" ]; then \
+		echo "Unknown Go version - using the latest linter"; \
+		GOLANGCI_LINT := v1.19.1; \
+	fi
+	@echo "Installing golangci-lint $(GOLANGCI_LINT)"
+	@[ -d $(GOPATH)/bin ] || mkdir -p $(GOPATH)/bin
+	@curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOPATH)/bin $(GOLANGCI_LINT)
 
 .PHONY: lint
 lint: 
@@ -40,6 +55,4 @@ install:
 uninstall:
 	@echo "Removing binaries and libraries"
 	@go clean -i ./...
-	@if [ -d $(OBJ_DIR) ]; then \
-		rm -rf $(OBJ_DIR); \
-	fi
+	@if [ -d $(OBJ_DIR) ]; then rm -rf $(OBJ_DIR); fi

README.md

@@ -1,17 +1,22 @@
-[![Build Status](https://travis-ci.org/uudashr/gopkgs.svg?branch=master)](https://travis-ci.org/uudashr/gopkgs)
-[![GoDoc](https://godoc.org/github.com/uudashr/gopkgs?status.svg)](https://godoc.org/github.com/uudashr/gopkgs)
+[![Build Status](https://travis-ci.org/uudashr/gopkgs.svg?branch=master)](https://travis-ci.org/uudashr/gopkgs)[![GoDoc](https://godoc.org/github.com/uudashr/gopkgs?status.svg)](https://godoc.org/github.com/uudashr/gopkgs)
+
 # gopkgs
 
-Gopkgs is tools that provide list of available Go packages that can be imported.
+`gopkgs` is a tool that provides list of available Go packages that can be imported.
 
 This is an alternative to `go list all`, just faster.
 
 ## Installation
 
 `$ go get -u github.com/uudashr/gopkgs/cmd/gopkgs`
 
+or, using **Go 1.12+**:
+
+`$ go get github.com/uudashr/gopkgs/cmd/gopkgs@latest`
+
 ## Usage
-```
+
+```plaintext
 $ gopkgs -help
   -format string
     	custom output format (default "{{.ImportPath}}")
@@ -34,8 +39,10 @@ Use -workDir={path} to speed up the package search. This will ignore any vendor
 ```
 
 ### Example
+
 Get package name along with the import path.
-```
+
+```plaintext
 $ gopkgs -format "{{.Name}};{{.ImportPath}}"
 testing;github.com/mattes/migrate/source/testing
 http;github.com/stretchr/testify/http
@@ -58,4 +65,4 @@ Use `-workDir={path}` flag, it will speed up the package search by ignoring the
 
 ## Related Project
 
-This is based on https://github.com/haya14busa/gopkgs but taking slightly different path by simplifying its implementation.
+This is based on <https://github.com/haya14busa/gopkgs> but takes slightly different path by simplifying its implementation.

go.mod

@@ -1,6 +1,8 @@
 module github.com/uudashr/gopkgs
 
+go 1.12
+
 require (
-	github.com/karrick/godirwalk v1.7.1
-	github.com/pkg/errors v0.8.0
+	github.com/karrick/godirwalk v1.12.0
+	github.com/pkg/errors v0.8.1
 )

go.sum

@@ -1,4 +1,4 @@
-github.com/karrick/godirwalk v1.7.1 h1:r3iVkkQFDuU9wELXmnGx0oRcizvC744QszlA4OxqwFE=
-github.com/karrick/godirwalk v1.7.1/go.mod h1:svlOlzFUryGta1ycTmmd6C6ytFMtCkPvQ/4fj4EXtU4=
-github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
-github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/karrick/godirwalk v1.12.0 h1:nkS4xxsjiZMvVlazd0mFyiwD4BR9f3m6LXGhM2TUx3Y=
+github.com/karrick/godirwalk v1.12.0/go.mod h1:H5KPZjojv4lE+QYImBI8xVtrBRgYrIVsaRPx4tDPEn4=
+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=

gopkgs.go

@@ -15,6 +15,12 @@ import (
 	pkgerrors "github.com/pkg/errors"
 )
 
+const (
+	mainPkg        = "main"
+	testDataDir    = "testdata"
+	nodeModulesDir = "node_modules"
+)
+
 // Pkg hold the information of the package.
 type Pkg struct {
 	Dir        string // directory containing package sources
@@ -126,7 +132,7 @@ func listFiles(srcDir, workDir string, noVendor bool) (<-chan goFile, <-chan err
 				// see: https://golang.org/cmd/go/#hdr-Description_of_package_lists
 
 				if de.IsDir() {
-					if name[0] == '.' || name[0] == '_' || name == "testdata" || name == "node_modules" {
+					if name[0] == '.' || name[0] == '_' || name == testDataDir || name == nodeModulesDir {
 						return filepath.SkipDir
 					}
 
@@ -205,7 +211,7 @@ func listModFiles(modDir string) (<-chan goFile, <-chan error) {
 				// see: https://golang.org/cmd/go/#hdr-Description_of_package_lists
 
 				if de.IsDir() {
-					if name[0] == '.' || name[0] == '_' || name == "testdata" || name == "node_modules" {
+					if name[0] == '.' || name[0] == '_' || name == testDataDir || name == nodeModulesDir {
 						return filepath.SkipDir
 					}
 
@@ -255,7 +261,7 @@ func collectPkgs(srcDir, workDir string, noVendor bool, out map[string]Pkg) erro
 			continue
 		}
 
-		if pkgName == "main" {
+		if pkgName == mainPkg {
 			// skip main package
 			continue
 		}
@@ -289,7 +295,7 @@ func collectModPkgs(m mod, out map[string]Pkg) error {
 			continue
 		}
 
-		if pkgName == "main" {
+		if pkgName == mainPkg {
 			// skip main package
 			continue
 		}
@@ -363,7 +369,7 @@ type mod struct {
 }
 
 func listMods(workDir string) ([]mod, error) {
-	cmdArgs := []string{"list", "-m", "-f={{.Path}};{{.Dir}}", "all"}
+	cmdArgs := []string{"list", "-m", `-mod=""`, "-f={{.Path}};{{.Dir}}", "all"}
 	cmd := exec.Command("go", cmdArgs...)
 	cmd.Dir = workDir
 	out, err := cmd.Output()