added icon generator script

.gitignore

@@ -0,0 +1,2 @@
+
+dist/

.goreleaser.yml

@@ -0,0 +1,32 @@
+# This is an example .goreleaser.yml file with some sensible defaults.
+# Make sure to check the documentation at https://goreleaser.com
+before:
+  hooks:
+    # You may remove this if you don't use go modules.
+    - go mod tidy
+    # you may remove this if you don't need go generate
+    - go generate ./...
+builds:
+  - env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+archives:
+  - replacements:
+      darwin: Darwin
+      linux: Linux
+      windows: Windows
+      386: i386
+      amd64: x86_64
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ incpatch .Version }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'

go.mod

@@ -0,0 +1,14 @@
+module appicon
+
+go 1.17
+
+require (
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
+	github.com/sirupsen/logrus v1.8.1
+)
+
+require (
+	github.com/stretchr/testify v1.7.0 // indirect
+	golang.org/x/sys v0.0.0-20211103235746-7861aae1554b // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+)

go.sum

@@ -0,0 +1,20 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
+github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20211103235746-7861aae1554b h1:1VkfZQv42XQlA/jchYumAnv1UPo6RgF9rJFkTgZIxO4=
+golang.org/x/sys v0.0.0-20211103235746-7861aae1554b/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"fmt"
+	"image/png"
+	"os"
+
+	"github.com/nfnt/resize"
+	"github.com/sirupsen/logrus"
+)
+
+func main() {
+
+	if len(os.Args) == 1 {
+		logrus.Fatal("No arguments provided")
+	}
+	path := os.Args[1]
+	file, err := os.Open(path)
+	if err != nil {
+		logrus.Fatal(fmt.Sprintf("Error opening file: %s", err))
+	}
+	defer file.Close()
+
+	// decode png into image.Image
+	img, err := png.Decode(file)
+	if err != nil {
+		logrus.Fatal(err)
+	}
+	file.Close()
+
+	// create ios icons
+	sizes := []float32{
+		1024,
+		108,
+		128,
+		16,
+		20,
+		24,
+		256,
+		27.5,
+		29,
+		32,
+		40,
+		44,
+		50,
+		512,
+		57,
+		60,
+		72,
+		76,
+		83.5,
+		86,
+		98,
+	}
+
+	// make sure the output directory exists
+	logrus.Info("Creating output directory")
+	os.MkdirAll("output", os.ModePerm)
+
+	logrus.Info("Creating icons")
+	for _, size := range sizes {
+		m := resize.Resize(uint(size), uint(size), img, resize.Lanczos3)
+		out, err := os.Create(fmt.Sprintf("output/%dx%d.png", uint(size), uint(size)))
+		if err != nil {
+			logrus.Fatal(err)
+		}
+		defer out.Close()
+		// write new image to file
+		png.Encode(out, m)
+		logrus.Info(fmt.Sprintf("Created %dx%d.png", uint(size), uint(size)))
+	}
+	logrus.Info("icons created successfully")
+}