diff --git a/.gitignore b/.gitignore new file mode 100644 index 00000000..9292986f --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +kadai1/image-convert \ No newline at end of file diff --git a/kadai1/JPG.png b/kadai1/JPG.png new file mode 100644 index 00000000..e94d04b2 Binary files /dev/null and b/kadai1/JPG.png differ diff --git a/kadai1/README.md b/kadai1/README.md new file mode 100644 index 00000000..f8acef56 --- /dev/null +++ b/kadai1/README.md @@ -0,0 +1,29 @@ +# 課題 1:画像変換コマンドを作ろう + +画像を指定の形式に変換する +変換後の画像ファイルは元の画像と同じディレクトリに配置される + +## コマンドラインオプション + +| オプション | 値の説明 | デフォルト値 | +| ---------- | -------------------------------------- | ------------ | +| -from | 変換前の画像形式(jpg,jpeg,pngから選択) | jpg | +| -to | 変換後の画像形式(jpg,jpeg,pngから選択) | png | +| -dir | ディレクトリの指定 | ./ | + +## 使い方 + +- ビルド + +```bash +go build -o image-convert +``` + +- ディレクトリを指定して実行 + +```bash +./image-convert [...options] [directory] +``` +```example +./image-convert -from png -to jpg -dir d1 +``` \ No newline at end of file diff --git a/kadai1/convert/convert.go b/kadai1/convert/convert.go new file mode 100644 index 00000000..47c45c2f --- /dev/null +++ b/kadai1/convert/convert.go @@ -0,0 +1,67 @@ +package convert + +import ( + "image" + "image/jpeg" + "image/png" + "os" + "path/filepath" +) + +func GetSelectedExtensionPath(fileType string, directory string) ([]string, error) { + var retval []string + err := filepath.Walk(directory, func(path string, info os.FileInfo, err error) error { + if err != nil { + return err + } + if filepath.Ext(path) == "."+fileType { + if f, err := os.Stat(path); !(os.IsNotExist(err) || f.IsDir()) { + retval = append(retval, path) + } + } + + return nil + }) + if err != nil { + return nil, err + } + return retval, nil +} + +func ConvertImage(fileName string, to string) error { + f, err := os.Open(fileName) + if err != nil { + return err + } + defer f.Close() + + img, _, err := image.Decode(f) + if err != nil { + return err + } + + out, err := os.Create(fileName[:len(fileName)-len(filepath.Ext(fileName))+1] + to) + if err != nil { + return err + } + defer out.Close() + + switch to { + case "jpg", "jpeg": + if err := jpeg.Encode(out, img, nil); err != nil { + return err + } + case "png": + if err := png.Encode(out, img); err != nil { + return err + } + default: + + } + + if err := os.Remove(fileName); err != nil { + return err + } + + return nil +} diff --git a/kadai1/d1/JPG.png b/kadai1/d1/JPG.png new file mode 100644 index 00000000..ffe7c3a1 Binary files /dev/null and b/kadai1/d1/JPG.png differ diff --git a/kadai1/go.mod b/kadai1/go.mod new file mode 100644 index 00000000..6bbedbc4 --- /dev/null +++ b/kadai1/go.mod @@ -0,0 +1,12 @@ +module image-convert + +go 1.17 + +require ( + github.com/yuin/goldmark v1.3.5 // indirect + golang.org/x/mod v0.4.2 // indirect + golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 // indirect + golang.org/x/sys v0.0.0-20210510120138-977fb7262007 // indirect + golang.org/x/tools v0.1.5 // indirect + golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect +) diff --git a/kadai1/go.sum b/kadai1/go.sum new file mode 100644 index 00000000..4ff03275 --- /dev/null +++ b/kadai1/go.sum @@ -0,0 +1,28 @@ +github.com/yuin/goldmark v1.3.5 h1:dPmz1Snjq0kmkz159iL7S6WzdahUTHnHB5M56WFVifs= +github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k= +golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= +golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= +golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo= +golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA= +golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= +golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= +golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 h1:4nGaVu0QrbjT/AK2PRLuQfQuh6DJve+pELhqTdAj3x0= +golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM= +golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20210510120138-977fb7262007 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE= +golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= +golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= +golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= +golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= +golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= +golang.org/x/tools v0.1.5 h1:ouewzE6p+/VEB31YYnTbEJdi8pFqKp4P4n85vwo3DHA= +golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk= +golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= +golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= +golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE= +golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= diff --git a/kadai1/main.go b/kadai1/main.go new file mode 100644 index 00000000..29fad44e --- /dev/null +++ b/kadai1/main.go @@ -0,0 +1,36 @@ +package main + +import ( + "flag" + "image-convert/convert" + "log" +) + +type cmdArgs struct { + from string + to string + dir string +} + +func parseArgs() *cmdArgs { + var cmd cmdArgs + flag.StringVar(&cmd.from, "from", "jpg", "from") + flag.StringVar(&cmd.to, "to", "png", "to") + flag.StringVar(&cmd.dir, "dir", "./", "directory") + flag.Parse() + return &cmd +} + +func main() { + var args = parseArgs() + var convertList, err = convert.GetSelectedExtensionPath(args.from, args.dir) + if err != nil { + log.Fatal(err) + } + for _, v := range convertList { + err := convert.ConvertImage(v, args.to) + if err != nil { + log.Fatal(err) + } + } +}