config file introduced

config.go

@@ -1,8 +1,82 @@
 package main
 
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"git.milar.in/milarin/configfile"
+)
+
 type Config struct {
-	OS         []string `json:"os"`
-	Arch       []string `json:"arch"`
-	NoCompress bool     `json:"no_compress"`
-	NumThreads int      `json:"num_threads"`
+	OutputDir string `json:"output_dir"`
+
+	OS   []string `json:"os"`
+	Arch []string `json:"arch"`
+
+	Silent     bool `json:"silent"`
+	NoCompress bool `json:"no_compress"`
+	NumThreads int  `json:"num_threads"`
+}
+
+func LoadConfig() error {
+	configFilePath, err := configfile.Path("json")
+	if err != nil {
+		return err
+	}
+
+	file, err := os.Open(configFilePath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	cfg := &Config{}
+	if err := json.NewDecoder(file).Decode(cfg); err != nil {
+		return err
+	}
+
+	*OutputDir = cfg.OutputDir
+	*OS = strings.Join(cfg.OS, ",")
+	*Arch = strings.Join(cfg.Arch, ",")
+	*Silent = cfg.Silent
+	*NoCompress = cfg.NoCompress
+	*NumThreads = cfg.NumThreads
+	return nil
+}
+
+func SaveConfig() (string, error) {
+	configFilePath, err := configfile.Path("json")
+	if err != nil {
+		return "", err
+	}
+
+	if err := os.MkdirAll(filepath.Dir(configFilePath), 0744); err != nil {
+		return configFilePath, err
+	}
+
+	file, err := os.Create(configFilePath)
+	if err != nil {
+		return configFilePath, err
+	}
+	defer file.Close()
+
+	enc := json.NewEncoder(file)
+	enc.SetIndent("", "\t")
+
+	cfg := &Config{
+		OutputDir:  *OutputDir,
+		OS:         strings.Split(*OS, ","),
+		Arch:       strings.Split(*Arch, ","),
+		Silent:     *Silent,
+		NoCompress: *NoCompress,
+		NumThreads: *NumThreads,
+	}
+
+	if err := enc.Encode(cfg); err != nil {
+		return configFilePath, err
+	}
+
+	return configFilePath, nil
 }

go.mod

@@ -4,13 +4,14 @@ go 1.19
 
 require (
 	git.milar.in/milarin/channel v0.0.7
+	git.milar.in/milarin/configfile v1.0.2
 	git.milar.in/milarin/gmath v0.0.1
 	github.com/fatih/color v1.13.0
 	golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e
 )
 
 require (
-	github.com/mattn/go-colorable v0.1.9 // indirect
-	github.com/mattn/go-isatty v0.0.14 // indirect
-	golang.org/x/sys v0.0.0-20211019181941-9d821ace8654 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.16 // indirect
+	golang.org/x/sys v0.0.0-20220817070843-5a390386f1f2 // indirect
 )

go.sum

@@ -1,18 +1,23 @@
 git.milar.in/milarin/channel v0.0.7 h1:cVKtwgH/EE7U+XTHcoFCClJ4LR349KanzjX9xKwRcNg=
 git.milar.in/milarin/channel v0.0.7/go.mod h1:We83LTI8S7u7II3pD+A2ChCDWJfCkcBUCUqii9HjTtM=
+git.milar.in/milarin/configfile v1.0.2 h1:QgZVSVDsFm3HK7PEg6a2ANeZxqo0JlIooyyJv8VaCNI=
+git.milar.in/milarin/configfile v1.0.2/go.mod h1:RsdN0d/a13WWJmxhuPjdexfUfLCeXAzBenbqz+KMkTs=
 git.milar.in/milarin/gmath v0.0.1 h1:pjUc1vYUE4bIky1fk0y0K347wU/9F9KtW312xkTF1YA=
 git.milar.in/milarin/gmath v0.0.1/go.mod h1:HDLftG5RLpiNGKiIWh+O2G1PYkNzyLDADO8Cd/1abiE=
 github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
 github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
-github.com/mattn/go-colorable v0.1.9 h1:sqDoxXbdeALODt0DAeJCVp38ps9ZogZEAXjus69YV3U=
 github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
-github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
 github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
+github.com/mattn/go-isatty v0.0.16 h1:bq3VjFmv/sOjHtdEhmkEV4x1AJtvUvOJ2PFAZ5+peKQ=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e h1:+WEEuIdZHnUeJJmEUjyYC2gfUMj69yZXw17EnHg/otA=
 golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e/go.mod h1:Kr81I6Kryrl9sr8s2FK3vxD90NdsKWRuOIl2O4CvYbA=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20211019181941-9d821ace8654 h1:id054HUawV2/6IGm2IV8KZQjqtwAOo2CYlOToYqa0d0=
-golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220817070843-5a390386f1f2 h1:fqTvyMIIj+HRzMmnzr9NtpHP6uVpvB5fkHcgPDC4nu8=
+golang.org/x/sys v0.0.0-20220817070843-5a390386f1f2/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

init.go

@@ -11,70 +11,67 @@ import (
 
 func Init() {
 	flag.Parse()
-
 	var err error
 
+	if *SaveConfigFile {
+		if configFilePath, err := SaveConfig(); err == nil {
+			Println(ColorDone.Sprintf("config file saved at '%s'", configFilePath))
+			os.Exit(0)
+		} else {
+			Println(ColorError.Sprint(fmt.Errorf("saving config file failed: %w", err)))
+			os.Exit(1)
+		}
+	} else {
+		if err := LoadConfig(); err != nil {
+			Println(ColorError.Sprint(fmt.Errorf("loading config file failed: %w", err)))
+		}
+	}
+
 	ModulePath, err = filepath.Abs(flag.Arg(0))
 	if err != nil {
-		if !*Silent {
-			ColorError.Fprintln(os.Stderr, "determining module path failed")
-		}
+		Println(ColorError.Sprint("determining module path failed"))
 		os.Exit(1)
 	}
 
 	*OutputDir, err = filepath.Abs(*OutputDir)
 	if err != nil {
-		if !*Silent {
-			ColorError.Fprintln(os.Stderr, "determining output path failed")
-		}
+		Println(ColorError.Sprint("determining output path failed"))
 		os.Exit(1)
 	}
 
 	if _, err := exec.LookPath("go"); err != nil {
-		if !*Silent {
-			ColorError.Fprintln(os.Stderr, "go not found in PATH. compilation not possible")
-		}
+		Println(ColorError.Sprint("go not found in PATH. compilation not possible"))
 		os.Exit(1)
 	}
 
 	if err := FillCompileConfigs(); err != nil {
-		if !*Silent {
-			ColorError.Fprintln(os.Stderr, fmt.Errorf("target architectures could not be determined: %w", err))
-		}
+		Println(ColorError.Sprint(fmt.Errorf("target architectures could not be determined: %w", err)))
 		os.Exit(1)
 	}
 
 	if _, err := os.Stat(filepath.Join(ModulePath, "go.mod")); errors.Is(err, os.ErrNotExist) {
-		if !*Silent {
-			ColorError.Fprintf(os.Stderr, "no Go module found at '%s'\n", ModulePath)
-		}
+		Println(ColorError.Sprintf("no Go module found at '%s'", ModulePath))
 		os.Exit(1)
 	}
 
 	if err := DetermineProjectName(); err != nil {
-		if !*Silent {
-			ColorError.Fprintln(os.Stderr, fmt.Errorf("project name could not be determined: %w", err))
-		}
+		Println(ColorError.Sprint(fmt.Errorf("project name could not be determined: %w", err)))
 		os.Exit(1)
 	}
 
 	if err := os.MkdirAll(*OutputDir, 0744); err != nil {
-		if !*Silent {
-			ColorError.Fprintln(os.Stderr, fmt.Errorf("output folder '%s' could not be made: %w", *OutputDir, err))
-		}
+		Println(ColorError.Sprint(fmt.Errorf("output folder '%s' could not be made: %w", *OutputDir, err)))
 		os.Exit(1)
 	}
 
 	if err := CheckDirWritable(*OutputDir); err != nil {
-		if !*Silent {
-			ColorError.Fprintf(os.Stderr, "output folder '%s' has insufficient permissions\n", *OutputDir)
-		}
+		Println(ColorError.Sprintf("output folder '%s' has insufficient permissions", *OutputDir))
 		os.Exit(1)
 	}
 
 	if !*NoCompress {
 		if _, err := exec.LookPath("upx"); err != nil {
-			ColorWarn.Fprintln(os.Stderr, "upx not found in PATH. file compression not possible")
+			Println(ColorWarn.Sprint(os.Stderr, "upx not found in PATH. file compression not possible"))
 			*NoCompress = true
 		}
 	}

main.go

@@ -24,15 +24,28 @@ var (
 	MaxConfigStringLength int
 )
 
+// command line arguments default values
+var (
+	DefaultOutputDir  = "output"
+	DefaultOS         = ""
+	DefaultArch       = ""
+	DefaultSilent     = false
+	DefaultNoCompress = false
+	DefaultNumThreads = runtime.NumCPU()
+)
+
 // command line arguments
 var (
-	OS   = flag.String("os", "", "comma-separated list of operating systems to compile for (empty for all)")
-	Arch = flag.String("arch", "", "comma-separated list of architectures to compile for (empty for all)")
+	OutputDir = flag.String("o", DefaultOutputDir, "output directory")
 
-	OutputDir  = flag.String("o", "output", "output directory")
-	Silent     = flag.Bool("s", false, "silent mode (no output)")
-	NoCompress = flag.Bool("c", false, "dont compress any executables")
-	NumThreads = flag.Int("t", runtime.NumCPU(), "amount of threads (0 = infinite)")
+	OS   = flag.String("os", DefaultOS, "comma-separated list of operating systems to compile for (empty for all)")
+	Arch = flag.String("arch", DefaultArch, "comma-separated list of architectures to compile for (empty for all)")
+
+	Silent     = flag.Bool("s", DefaultSilent, "silent mode (no output)")
+	NoCompress = flag.Bool("c", DefaultNoCompress, "dont compress any executables")
+	NumThreads = flag.Int("t", DefaultNumThreads, "amount of threads (0 = infinite)")
+
+	SaveConfigFile = flag.Bool("saveconfig", false, "save config file with current configuration and exit")
 )
 
 func main() {

print.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func Println(args ...interface{}) {
+	if !*Silent {
+		fmt.Fprintln(os.Stderr, args...)
+	}
+}
+
+func Printf(format string, args ...interface{}) {
+	if !*Silent {
+		fmt.Fprintf(os.Stderr, format, args...)
+	}
+}