Merge branch 'v0.13.0-pre' into v0.13.0

Added Dependancy check for redhat distros

.chglog/CHANGELOG.tpl.md

@@ -0,0 +1,42 @@
+{{ if .Versions -}}
+<a name="unreleased"></a>
+## [Unreleased]
+
+{{ if .Unreleased.CommitGroups -}}
+{{ range .Unreleased.CommitGroups -}}
+### {{ .Title }}
+{{ range .Commits -}}
+- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
+{{ end }}
+{{ end -}}
+{{ end -}}
+{{ end -}}
+
+{{ range .Versions }}
+<a name="{{ .Tag.Name }}"></a>
+## {{ if .Tag.Previous }}[{{ .Tag.Name }}]{{ else }}{{ .Tag.Name }}{{ end }} - {{ datetime "2006-01-02" .Tag.Date }}
+{{ range .CommitGroups -}}
+### {{ .Title }}
+{{ range .Commits -}}
+- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
+{{ end }}
+{{ end -}}
+
+{{- if .NoteGroups -}}
+{{ range .NoteGroups -}}
+### {{ .Title }}
+{{ range .Notes }}
+{{ .Body }}
+{{ end }}
+{{ end -}}
+{{ end -}}
+{{ end -}}
+
+{{- if .Versions }}
+[Unreleased]: {{ .Info.RepositoryURL }}/compare/{{ $latest := index .Versions 0 }}{{ $latest.Tag.Name }}...HEAD
+{{ range .Versions -}}
+{{ if .Tag.Previous -}}
+[{{ .Tag.Name }}]: {{ $.Info.RepositoryURL }}/compare/{{ .Tag.Previous.Name }}...{{ .Tag.Name }}
+{{ end -}}
+{{ end -}}
+{{ end -}}

.chglog/config.yml

@@ -0,0 +1,27 @@
+style: github
+template: CHANGELOG.tpl.md
+info:
+  title: CHANGELOG
+  repository_url: https://github.com/wailsapp/wails
+options:
+  commits:
+    # filters:
+    #   Type:
+    #     - feat
+    #     - fix
+    #     - perf
+    #     - refactor
+  commit_groups:
+    # title_maps:
+    #   feat: Features
+    #   fix: Bug Fixes
+    #   perf: Performance Improvements
+    #   refactor: Code Refactoring
+  header:
+    pattern: "^(\\w*)\\:\\s(.*)$"
+    pattern_maps:
+      - Type
+      - Subject
+  notes:
+    keywords:
+      - BREAKING CHANGE

CHANGELOG.md

@@ -0,0 +1,19 @@
+
+<a name="v0.13.0"></a>
+## [v0.13.0] - 2019-05-12
+
+### Feat
+- revamped 'update' system
+- no need for explicit GO111MODULE=on
+
+### Fix
+- documentation typo fixes
+- windows init project
+- windows 10 colour
+- leave windows assets on -p flag
+- show prerequisite errors
+
+### Docs
+- updated contributors
+- added awesomego logo
+- added Redhat distro

CONTRIBUTORS.md

@@ -6,4 +6,7 @@ Wails is what it is because of the time and effort given by these great people.
 * [Qais Patankar](https://github.com/qaisjp)
 * [Anthony Lee](https://github.com/alee792)
 * [Adrian Lanzafame](https://github.com/lanzafame)
-* [0xflotus](https://github.com/0xflotus)
+* [0xflotus](https://github.com/0xflotus)
+* [Michael D Henderson](https://github.com/mdhender)
+* [fred2104] (https://github.com/fishfishfish2104)
+* [intelwalk] (https://github.com/intelwalk)

README.md

@@ -9,6 +9,7 @@
    <a href="https://www.codefactor.io/repository/github/wailsapp/wails"><img src="https://www.codefactor.io/repository/github/wailsapp/wails/badge" alt="CodeFactor" /></a>
    <a href="https://github.com/wailsapp/wails/issues"><img src="https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat" alt="CodeFactor" /></a>
    <a href="https://houndci.com"><img src="https://img.shields.io/badge/Reviewed_by-Hound-8E64B0.svg"/></a>
+   <a href="https://github.com/sindresorhus/awesome" rel="nofollow"><img src="https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg" alt="Awesome"></a>-
 </p>
 
 The traditional method of providing web interfaces to Go programs is via a built-in web server. Wails offers a different approach: it provides the ability to wrap both Go code and a web frontend into a single binary. Tools are provided to make this easy for you by handling project creation, compilation and bundling. All you have to do is get creative!
@@ -51,6 +52,10 @@ Make sure you have the xcode command line tools installed. This can be done by r
 
 `sudo pacman -S webkit2gtk gtk3`
 
+#### Red Hat Based Distros
+
+`sudo yum install webkit2gtk-devel gtk3-devel`
+
 Note: If you have successfully installed these dependencies on a different flavour of Linux, please consider submitting a PR.
 
 ### Windows
@@ -62,7 +67,7 @@ Windows requires gcc and related tooling. The recommended download is from [http
 Installation is as simple as running the following command:
 
 <pre style='color:white'>
-go get -u github.com/wailsapp/wails/cmd/wails
+go get github.com/wailsapp/wails/cmd/wails
 </pre>
 
 ## Next Steps

cmd/github.go

@@ -0,0 +1,108 @@
+package cmd
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"sort"
+)
+
+// GitHubHelper is a utility class for interacting with GitHub
+type GitHubHelper struct {
+}
+
+// NewGitHubHelper returns a new GitHub Helper
+func NewGitHubHelper() *GitHubHelper {
+	return &GitHubHelper{}
+}
+
+// GetVersionTags gets the list of tags on the Wails repo
+// It retuns a list of sorted tags in descending order
+func (g *GitHubHelper) GetVersionTags() ([]*SemanticVersion, error) {
+
+	result := []*SemanticVersion{}
+	var err error
+
+	resp, err := http.Get("https://api.github.com/repos/wailsapp/wails/tags")
+	if err != nil {
+		return result, err
+	}
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return result, err
+	}
+
+	data := []map[string]interface{}{}
+	err = json.Unmarshal(body, &data)
+	if err != nil {
+		return result, err
+	}
+
+	// Convert tag data to Version structs
+	for _, tag := range data {
+		version := tag["name"].(string)
+		semver, err := NewSemanticVersion(version)
+		if err != nil {
+			return result, err
+		}
+		result = append(result, semver)
+	}
+
+	// Reverse Sort
+	sort.Sort(sort.Reverse(SemverCollection(result)))
+
+	return result, err
+}
+
+// GetLatestStableRelease gets the latest stable release on GitHub
+func (g *GitHubHelper) GetLatestStableRelease() (result *SemanticVersion, err error) {
+
+	tags, err := g.GetVersionTags()
+	if err != nil {
+		return nil, err
+	}
+
+	for _, tag := range tags {
+		if tag.IsRelease() {
+			return tag, nil
+		}
+	}
+
+	return nil, fmt.Errorf("no release tag found")
+}
+
+// GetLatestPreRelease gets the latest prerelease on GitHub
+func (g *GitHubHelper) GetLatestPreRelease() (result *SemanticVersion, err error) {
+
+	tags, err := g.GetVersionTags()
+	if err != nil {
+		return nil, err
+	}
+
+	for _, tag := range tags {
+		if tag.IsPreRelease() {
+			return tag, nil
+		}
+	}
+
+	return nil, fmt.Errorf("no prerelease tag found")
+}
+
+// IsValidTag returns true if the given string is a valid tag
+func (g *GitHubHelper) IsValidTag(tagVersion string) (bool, error) {
+	if tagVersion[0] == 'v' {
+		tagVersion = tagVersion[1:]
+	}
+	tags, err := g.GetVersionTags()
+	if err != nil {
+		return false, err
+	}
+
+	for _, tag := range tags {
+		if tag.String() == tagVersion {
+			return true, nil
+		}
+	}
+	return false, nil
+}

cmd/helpers.go

@@ -83,6 +83,7 @@ func BuildApplication(binaryName string, forceRebuild bool, buildMode string, pa
 		// Ignore errors
 		buildCommand.Add("-i")
 	}
+
 	buildCommand.Add("build")
 
 	if binaryName != "" {
@@ -127,7 +128,7 @@ func BuildApplication(binaryName string, forceRebuild bool, buildMode string, pa
 	return nil
 }
 
-// PackageApplication will attempt to package the application in a pltform dependent way
+// PackageApplication will attempt to package the application in a platform dependent way
 func PackageApplication(projectOptions *ProjectOptions) error {
 	// Package app
 	message := "Generating .app"

cmd/linux.go

@@ -2,6 +2,9 @@ package cmd
 
 import (
 	"fmt"
+	"io/ioutil"
+	"os"
+	"regexp"
 	"strings"
 )
 
@@ -15,6 +18,8 @@ const (
 	Ubuntu
 	// Arch linux distribution
 	Arch
+	// RedHat linux distribution
+	RedHat
 )
 
 // DistroInfo contains all the information relating to a linux distribution
@@ -64,7 +69,19 @@ func GetLinuxDistroInfo() *DistroInfo {
 				}
 			}
 		}
-
+		// check if /etc/os-release exists
+	} else if _, err := os.Stat("/etc/os-release"); !os.IsNotExist(err) {
+		// read /etc/os-release
+		osRelease, _ := ioutil.ReadFile("/etc/os-release")
+		// compile a regex to find NAME=distro
+		re := regexp.MustCompile(`^NAME=(.*)\n`)
+		// extract the distro name
+		osName := string(re.FindSubmatch(osRelease)[1])
+		// Check distro name against list of RedHat distros
+		if osName == "Fedora" || osName == "CentOS" {
+			//if it matches set result.Distribution to RedHat
+			result.Distribution = RedHat
+		}
 	}
 	return result
 }
@@ -90,3 +107,14 @@ func PacmanInstalled(packageName string) (bool, error) {
 	_, _, exitCode, _ := pacman.Run("-Qs", packageName)
 	return exitCode == 0, nil
 }
+
+// RpmInstalled uses rpm to see if a package is installed
+func RpmInstalled(packageName string) (bool, error) {
+	program := NewProgramHelper()
+	rpm := program.FindProgram("rpm")
+	if rpm == nil {
+		return false, fmt.Errorf("cannot check dependencies: rpm not found")
+	}
+	_, _, exitCode, _ := rpm.Run("--query", packageName)
+	return exitCode == 0, nil
+}

cmd/package.go

@@ -76,7 +76,7 @@ func (b *PackageHelper) Package(po *ProjectOptions) error {
 		}
 		return b.packageOSX(po)
 	case "windows":
-		return b.PackageWindows(po, true)
+		return b.PackageWindows(po, false)
 	case "linux":
 		return fmt.Errorf("linux is not supported at this time. Please see https://github.com/wailsapp/wails/issues/2")
 	default:
@@ -199,7 +199,7 @@ func (b *PackageHelper) PackageWindows(po *ProjectOptions, cleanUp bool) error {
 
 	// clean up
 	if cleanUp {
-		filesToDelete := []string{tgtIconFile, tgtManifestFile, tgtRCFile}
+		filesToDelete := []string{tgtIconFile, tgtManifestFile, tgtRCFile, sysofile}
 		err := b.fs.RemoveFiles(filesToDelete)
 		if err != nil {
 			return err

cmd/prerequisites.go

@@ -99,7 +99,10 @@ func getRequiredLibrariesLinux() (*Prerequisites, error) {
 		result.Add(newPrerequisite("libwebkit2gtk-4.0-dev", "Please install with `sudo apt install libwebkit2gtk-4.0-dev` and try again"))
 	case Arch:
 		result.Add(newPrerequisite("gtk3", "Please install with `sudo pacman -S gtk3` and try again"))
-		result.Add(newPrerequisite("webkit2gtk", "Please install with `sudo pacman -S webkit2gtk"))
+		result.Add(newPrerequisite("webkit2gtk", "Please install with `sudo pacman -S webkit2gtk` and try again"))
+	case RedHat:
+		result.Add(newPrerequisite("gtk3-devel", "Please install with `sudo yum install gtk3-devel` and try again"))
+		result.Add(newPrerequisite("webkit2gtk3-devel", "Please install with `sudo yum install webkit2gtk3-devel` and try again"))
 	default:
 		result.Add(newPrerequisite("libgtk-3-dev", "Please install with your system package manager and try again"))
 		result.Add(newPrerequisite("libwebkit2gtk-4.0-dev", "Please install with your system package manager and try again"))

cmd/program.go

@@ -92,7 +92,7 @@ func (p *Program) Run(vars ...string) (stdout, stderr string, exitCode int, err
 
 // InstallGoPackage installs the given Go package
 func (p *ProgramHelper) InstallGoPackage(packageName string) error {
-	args := strings.Split("get -u "+packageName, " ")
+	args := strings.Split("get "+packageName, " ")
 	_, stderr, err := p.shell.Run("go", args...)
 	if err != nil {
 		fmt.Println(stderr)
@@ -107,7 +107,7 @@ func (p *ProgramHelper) RunCommand(command string) error {
 }
 
 // RunCommandArray runs the command specified in the array
-func (p *ProgramHelper) RunCommandArray(args []string) error {
+func (p *ProgramHelper) RunCommandArray(args []string, dir ...string) error {
 	program := args[0]
 	// TODO: Run FindProgram here and get the full path to the exe
 	program, err := exec.LookPath(program)
@@ -116,8 +116,13 @@ func (p *ProgramHelper) RunCommandArray(args []string) error {
 		return err
 	}
 	args = args[1:]
+	var stderr string
 	// fmt.Printf("RunCommandArray = %s %+v\n", program, args)
-	_, stderr, err := p.shell.Run(program, args...)
+	if len(dir) > 0 {
+		_, stderr, err = p.shell.RunInDirectory(dir[0], program, args...)
+	} else {
+		_, stderr, err = p.shell.Run(program, args...)
+	}
 	if err != nil {
 		fmt.Println(stderr)
 	}

cmd/semver.go

@@ -0,0 +1,98 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/masterminds/semver"
+)
+
+// SemanticVersion is a struct containing a semantic version
+type SemanticVersion struct {
+	Version *semver.Version
+}
+
+// NewSemanticVersion creates a new SemanticVersion object with the given version string
+func NewSemanticVersion(version string) (*SemanticVersion, error) {
+	semverVersion, err := semver.NewVersion(version)
+	if err != nil {
+		return nil, err
+	}
+	return &SemanticVersion{
+		Version: semverVersion,
+	}, nil
+}
+
+// IsRelease returns true if it's a release version
+func (s *SemanticVersion) IsRelease() bool {
+	return len(s.Version.Prerelease()) == 0 && len(s.Version.Metadata()) == 0
+}
+
+// IsPreRelease returns true if it's a prerelease version
+func (s *SemanticVersion) IsPreRelease() bool {
+	return len(s.Version.Prerelease()) > 0
+}
+
+func (s *SemanticVersion) String() string {
+	return s.Version.String()
+}
+
+// IsGreaterThan returns true if this version is greater than the given version
+func (s *SemanticVersion) IsGreaterThan(version *SemanticVersion) (bool, error) {
+	// Set up new constraint
+	constraint, err := semver.NewConstraint("> " + version.Version.String())
+	if err != nil {
+		return false, err
+	}
+
+	// Check if the desired one is greater than the requested on
+	success, msgs := constraint.Validate(s.Version)
+	if !success {
+		return false, msgs[0]
+	}
+	return true, nil
+}
+
+// IsGreaterThanOrEqual returns true if this version is greater than or equal the given version
+func (s *SemanticVersion) IsGreaterThanOrEqual(version *SemanticVersion) (bool, error) {
+	// Set up new constraint
+	constraint, err := semver.NewConstraint(">= " + version.Version.String())
+	if err != nil {
+		return false, err
+	}
+
+	// Check if the desired one is greater than the requested on
+	success, msgs := constraint.Validate(s.Version)
+	if !success {
+		return false, msgs[0]
+	}
+	return true, nil
+}
+
+// MainVersion returns the main version of any version+prerelease+metadata
+// EG: MainVersion("1.2.3-pre") => "1.2.3"
+func (s *SemanticVersion) MainVersion() *SemanticVersion {
+	mainVersion := fmt.Sprintf("%d.%d.%d", s.Version.Major(), s.Version.Minor(), s.Version.Patch())
+	result, _ := NewSemanticVersion(mainVersion)
+	return result
+}
+
+// SemverCollection is a collection of SemanticVersion objects
+type SemverCollection []*SemanticVersion
+
+// Len returns the length of a collection. The number of Version instances
+// on the slice.
+func (c SemverCollection) Len() int {
+	return len(c)
+}
+
+// Less is needed for the sort interface to compare two Version objects on the
+// slice. If checks if one is less than the other.
+func (c SemverCollection) Less(i, j int) bool {
+	return c[i].Version.LessThan(c[j].Version)
+}
+
+// Swap is needed for the sort interface to replace the Version objects
+// at two different positions in the slice.
+func (c SemverCollection) Swap(i, j int) {
+	c[i], c[j] = c[j], c[i]
+}

cmd/shell.go

@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"bytes"
+	"os"
 	"os/exec"
 )
 
@@ -17,6 +18,21 @@ func NewShellHelper() *ShellHelper {
 // Run the given command
 func (sh *ShellHelper) Run(command string, vars ...string) (stdout, stderr string, err error) {
 	cmd := exec.Command(command, vars...)
+	cmd.Env = append(os.Environ(), "GO111MODULE=on")
+	var stdo, stde bytes.Buffer
+	cmd.Stdout = &stdo
+	cmd.Stderr = &stde
+	err = cmd.Run()
+	stdout = string(stdo.Bytes())
+	stderr = string(stde.Bytes())
+	return
+}
+
+// RunInDirectory runs the given command in the given directory
+func (sh *ShellHelper) RunInDirectory(dir string, command string, vars ...string) (stdout, stderr string, err error) {
+	cmd := exec.Command(command, vars...)
+	cmd.Dir = dir
+	cmd.Env = append(os.Environ(), "GO111MODULE=on")
 	var stdo, stde bytes.Buffer
 	cmd.Stdout = &stdo
 	cmd.Stderr = &stde

cmd/system.go

@@ -245,7 +245,7 @@ func CheckDependencies(logger *Logger) (bool, error) {
 		bin := programHelper.FindProgram(program.Name)
 		if bin == nil {
 			errors = true
-			logger.Red("Program '%s' not found. %s", program.Name, program.Help)
+			logger.Error("Program '%s' not found. %s", program.Name, program.Help)
 		} else {
 			logger.Green("Program '%s' found: %s", program.Name, bin.Path)
 		}
@@ -268,7 +268,7 @@ func CheckDependencies(logger *Logger) (bool, error) {
 				}
 				if !installed {
 					errors = true
-					logger.Red("Library '%s' not found. %s", library.Name, library.Help)
+					logger.Error("Library '%s' not found. %s", library.Name, library.Help)
 				} else {
 					logger.Green("Library '%s' installed.", library.Name)
 				}
@@ -279,7 +279,19 @@ func CheckDependencies(logger *Logger) (bool, error) {
 				}
 				if !installed {
 					errors = true
-					logger.Red("Library '%s' not found. %s", library.Name, library.Help)
+					logger.Error("Library '%s' not found. %s", library.Name, library.Help)
+				} else {
+					logger.Green("Library '%s' installed.", library.Name)
+				}
+			case RedHat:
+
+				installed, err := RpmInstalled(library.Name)
+				if err != nil {
+					return false, err
+				}
+				if !installed {
+					errors = true
+					logger.Error("Library '%s' not found. %s", library.Name, library.Help)
 				} else {
 					logger.Green("Library '%s' installed.", library.Name)
 				}

cmd/templates.go

@@ -63,7 +63,7 @@ func NewTemplateList(filenames *mewnlib.FileGroup) *TemplateList {
 		if err != nil {
 			log.Fatalf("corrupt metadata for template: %s", filename)
 		}
-		path := strings.Split(filename, string(filepath.Separator))[0]
+		path := strings.Split(filename, "/")[0]
 		thisTemplate := &TemplateDetails{Path: path, Metadata: &metadata}
 		result.details[filename] = thisTemplate
 	})
@@ -107,6 +107,7 @@ func (t *TemplateHelper) InstallTemplate(projectPath string, projectOptions *Pro
 	templateJSONFilename := filepath.Join(templatePath, "template.json")
 
 	templateFiles := templateFilenames.Filter(func(filename string) bool {
+		filename = filepath.FromSlash(filename)
 		return strings.HasPrefix(filename, templatePath) && filename != templateJSONFilename
 	})
 

cmd/version.go

@@ -1,4 +1,4 @@
 package cmd
 
 // Version - Wails version
-const Version = "v0.12.0"
+const Version = "v0.13.0"

cmd/wails/6_serve.go

@@ -14,7 +14,7 @@ func init() {
 	buildSpinner.SetSpinSpeed(50)
 
 	commandDescription := `This command builds then serves your application in bridge mode. Useful for developing your app in a browser.`
-	initCmd := app.Command("serve", "Run your Wails project in bridge mode.").
+	initCmd := app.Command("serve", "Run your Wails project in bridge mode").
 		LongDescription(commandDescription).
 		BoolFlag("f", "Force rebuild of application components", &forceRebuild)
 

cmd/wails/8_update.go

@@ -1,24 +1,28 @@
 package main
 
 import (
-	"encoding/json"
 	"fmt"
-	"io/ioutil"
-	"net/http"
+	"log"
 
 	"github.com/leaanthony/spinner"
+	"github.com/mitchellh/go-homedir"
 	"github.com/wailsapp/wails/cmd"
 )
 
 func init() {
 
+	var prereleaseRequired bool
+	var specificVersion string
+
 	// var forceRebuild = false
 	checkSpinner := spinner.NewSpinner()
 	checkSpinner.SetSpinSpeed(50)
 
-	commandDescription := `This command checks if there are updates to Wails.`
-	updateCmd := app.Command("update", "Check for Updates.").
-		LongDescription(commandDescription)
+	commandDescription := `This command allows you to update your version of Wails.`
+	updateCmd := app.Command("update", "Update to newer [pre]releases or specific versions").
+		LongDescription(commandDescription).
+		BoolFlag("pre", "Update to latest Prerelease", &prereleaseRequired).
+		StringFlag("version", "Install a specific version (Overrides other flags)", &specificVersion)
 
 	updateCmd.Action(func() error {
 
@@ -28,42 +32,131 @@ func init() {
 
 		// Get versions
 		checkSpinner.Start(message)
-		resp, err := http.Get("https://api.github.com/repos/wailsapp/wails/tags")
+
+		github := cmd.NewGitHubHelper()
+		var desiredVersion *cmd.SemanticVersion
+		var err error
+		var valid bool
+
+		if len(specificVersion) > 0 {
+			// Check if this is a valid version
+			valid, err = github.IsValidTag(specificVersion)
+			if err == nil {
+				if !valid {
+					err = fmt.Errorf("version '%s' is invalid", specificVersion)
+				} else {
+					desiredVersion, err = cmd.NewSemanticVersion(specificVersion)
+				}
+			}
+		} else {
+			if prereleaseRequired {
+				desiredVersion, err = github.GetLatestPreRelease()
+			} else {
+				desiredVersion, err = github.GetLatestStableRelease()
+			}
+		}
 		if err != nil {
 			checkSpinner.Error(err.Error())
 			return err
 		}
 		checkSpinner.Success()
-		body, err := ioutil.ReadAll(resp.Body)
-		if err != nil {
-			checkSpinner.Error(err.Error())
-			return err
-		}
-
-		data := []map[string]interface{}{}
-		err = json.Unmarshal(body, &data)
-		if err != nil {
-			return err
-		}
-
-		latestVersion := data[0]["name"].(string)
 		fmt.Println()
-		fmt.Println("Current Version: " + cmd.Version)
-		fmt.Println(" Latest Version: " + latestVersion)
-		if latestVersion != cmd.Version {
-			updateSpinner := spinner.NewSpinner()
-			updateSpinner.SetSpinSpeed(40)
-			updateSpinner.Start("Updating to  : " + latestVersion)
-			err = cmd.NewProgramHelper().RunCommandArray([]string{"go", "get", "-u", "github.com/wailsapp/wails/cmd/wails"})
-			if err != nil {
-				updateSpinner.Error(err.Error())
-				return err
-			}
-			updateSpinner.Success()
-			logger.Yellow("Wails updated to " + latestVersion)
+
+		fmt.Println("    Current Version : " + cmd.Version)
+
+		if len(specificVersion) > 0 {
+			fmt.Printf("    Desired Version : v%s\n", desiredVersion)
 		} else {
-			logger.Yellow("Looks like you're up to date!")
+			if prereleaseRequired {
+				fmt.Printf("  Latest Prerelease : v%s\n", desiredVersion)
+			} else {
+				fmt.Printf("     Latest Release : v%s\n", desiredVersion)
+			}
 		}
-		return nil
+
+		return updateToVersion(desiredVersion, len(specificVersion) > 0)
 	})
 }
+
+func updateToVersion(targetVersion *cmd.SemanticVersion, force bool) error {
+
+	var targetVersionString = "v" + targetVersion.String()
+
+	// Early exit
+	if targetVersion.String() == cmd.Version {
+		logger.Green("Looks like you're up to date!")
+		return nil
+	}
+
+	var desiredVersion string
+
+	if !force {
+
+		compareVersion := cmd.Version
+
+		currentVersion, err := cmd.NewSemanticVersion(compareVersion)
+		if err != nil {
+			return err
+		}
+
+		var success bool
+
+		// Release -> Pre-Release = Massage current version to prerelease format
+		if targetVersion.IsPreRelease() && currentVersion.IsRelease() {
+			currentVersion, err = cmd.NewSemanticVersion(compareVersion)
+			if err != nil {
+				return err
+			}
+			success, err = targetVersion.IsGreaterThan(currentVersion)
+			if err != nil {
+				return err
+			}
+		}
+		// Pre-Release -> Release = Massage target version to prerelease format
+		if targetVersion.IsRelease() && currentVersion.IsPreRelease() {
+			// We are ok with greater than or equal
+			mainversion := currentVersion.MainVersion()
+			targetVersion, err = cmd.NewSemanticVersion(targetVersion.String())
+			if err != nil {
+				return err
+			}
+			success, err = targetVersion.IsGreaterThanOrEqual(mainversion)
+			if err != nil {
+				return err
+			}
+		}
+
+		desiredVersion = "v" + targetVersion.String()
+
+		// Compare
+		if !success {
+			logger.Red("The requested version is lower than the current version.")
+			logger.Red("If this is what you really want to do, use `wails update -version %s`", targetVersionString)
+			return nil
+		}
+	} else {
+		desiredVersion = "v" + targetVersion.String()
+	}
+
+	fmt.Println()
+	updateSpinner := spinner.NewSpinner()
+	updateSpinner.SetSpinSpeed(40)
+	updateSpinner.Start("Installing Wails " + desiredVersion)
+
+	// Run command in non module directory
+	homeDir, err := homedir.Dir()
+	if err != nil {
+		log.Fatal("Cannot find home directory! Please file a bug report!")
+	}
+
+	err = cmd.NewProgramHelper().RunCommandArray([]string{"go", "get", "github.com/wailsapp/wails/cmd/wails@" + desiredVersion}, homeDir)
+	if err != nil {
+		updateSpinner.Error(err.Error())
+		return err
+	}
+	updateSpinner.Success()
+	fmt.Println()
+	logger.Green("Wails updated to " + desiredVersion)
+
+	return nil
+}

cmd/wails/9_issue.go

@@ -18,7 +18,7 @@ func init() {
 
 	commandDescription := `Generates an issue in Github using the given title, description and system report.`
 
-	initCommand := app.Command("issue", "Generates an issue in Github.").
+	initCommand := app.Command("issue", "Generates an issue in Github").
 		LongDescription(commandDescription)
 
 	initCommand.Action(func() error {

cmd/windows.go

@@ -0,0 +1,19 @@
+// +build windows
+
+package cmd
+
+import (
+	"os"
+
+	"golang.org/x/sys/windows"
+)
+
+// Credit: https://stackoverflow.com/a/52579002
+
+func init() {
+	stdout := windows.Handle(os.Stdout.Fd())
+	var originalMode uint32
+
+	_ = windows.GetConsoleMode(stdout, &originalMode)
+	_ = windows.SetConsoleMode(stdout, originalMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+}