[fyne-cli] Add support for passing custom build tags

Fixes #1538

CHANGELOG.md

@@ -5,6 +5,10 @@ More detailed release notes can be found on the [releases page](https://github.c
 
 ## 1.4.2 - Ongoing
 
+### Added
+
+* [fyne-cli] Add support for passing custom build tags (#1538)
+
 ### Fixed
 
 * [fyne-cli] Android: allow to specify an inline password for the keystore

cmd/fyne/commands/build.go

@@ -5,11 +5,13 @@ import (
 	"os"
 	"os/exec"
 	"runtime"
+	"strings"
 )
 
 type builder struct {
 	os, srcdir string
 	release    bool
+	tags       []string
 }
 
 func (b *builder) build() error {
@@ -32,9 +34,16 @@ func (b *builder) build() error {
 			args = append(args, "build")
 		}
 	}
+
+	// handle build tags
+	tags := b.tags
 	if b.release {
-		args = append(args, "-tags", "release")
+		args = append(tags, "release")
+	}
+	if len(tags) > 0 {
+		args = append(args, "-tags", strings.Join(tags, ","))
 	}
+
 	cmd := exec.Command("go", args...)
 	cmd.Dir = b.srcdir
 	env := os.Environ()

cmd/fyne/commands/package.go

@@ -31,6 +31,7 @@ type packager struct {
 	appBuild                     int
 	install, release             bool
 	certificate, profile         string // optional flags for releasing
+	tags                         string
 }
 
 // NewPackager returns a packager command that can wrap executables into full GUI app packages.
@@ -48,6 +49,7 @@ func (p *packager) AddFlags() {
 	flag.StringVar(&p.appVersion, "appVersion", "", "Version number in the form x, x.y or x.y.z semantic version")
 	flag.IntVar(&p.appBuild, "appBuild", 0, "Build number, should be greater than 0 and incremented for each build")
 	flag.BoolVar(&p.release, "release", false, "Should this package be prepared for release? (disable debug etc)")
+	flag.StringVar(&p.tags, "tags", "", "A comma-separated list of build tags")
 }
 
 func (*packager) PrintHelp(indent string) {
@@ -71,10 +73,12 @@ func (p *packager) Run(_ []string) {
 }
 
 func (p *packager) buildPackage() error {
+	tags := strings.Split(p.tags, ",")
 	b := &builder{
 		os:      p.os,
 		srcdir:  p.srcDir,
 		release: p.release,
+		tags:    tags,
 	}
 
 	return b.build()

cmd/fyne/commands/release.go

@@ -47,6 +47,7 @@ func (r *releaser) AddFlags() {
 	flag.StringVar(&r.profile, "profile", "", "iOS/macOS: name of the provisioning profile for this release build")
 	flag.StringVar(&r.developer, "developer", "", "Windows: the developer identity for your Microsoft store account")
 	flag.StringVar(&r.password, "password", "", "Windows: password for the certificate used to sign the build")
+	flag.StringVar(&r.tags, "tags", "", "A comma-separated list of build tags")
 }
 
 func (r *releaser) PrintHelp(indent string) {