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Kadai1 s-shiraki #76
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| Original file line number | Diff line number | Diff line change |
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| kadai1/image-convert |
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| # 課題 1:画像変換コマンドを作ろう | ||
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| 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 | ||
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| ## コマンドラインオプション | ||
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| | 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 | ./ | | ||
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| ## 使い方 | ||
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| - ビルド | ||
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| ```bash | ||
| go build -o image-convert | ||
| ``` | ||
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| - ディレクトリを指定して実行 | ||
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| ```bash | ||
| ./image-convert [...options] [directory] | ||
| ``` | ||
| ```example | ||
| ./image-convert -from png -to jpg -dir d1 | ||
| ``` |
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| @@ -0,0 +1,18 @@ | ||
| package args | ||
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| import "flag" | ||
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| type CmdArgs struct { | ||
| From string | ||
| To string | ||
| Dir string | ||
| } | ||
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| 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 | ||
| } | ||
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| package convert | ||
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| import ( | ||
| "fmt" | ||
| "image" | ||
| "image/jpeg" | ||
| "image/png" | ||
| "log" | ||
| "os" | ||
| "path/filepath" | ||
| "strings" | ||
| ) | ||
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| func GetSelectedExtensionPath(fileType string, directory string) [][]string { | ||
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| var retval [][]string | ||
| err := filepath.Walk(directory, func(path string, info os.FileInfo, err error) error { | ||
|
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. パスはディレクトリも含んでいるため、ディレクトリではないかのチェックが必要です。 |
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| if err != nil { | ||
| return err | ||
| } | ||
| slice := strings.Split(path, ".") | ||
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| if slice[len(slice)-1] == fileType { | ||
| retval = append(retval, slice) | ||
| } | ||
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| return nil | ||
| }) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
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| } | ||
| return retval | ||
| } | ||
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| func ConvertImage(fileName string, from string, to string) { | ||
| f, err := os.Open(fileName + "." + from) | ||
| if err != nil { | ||
| fmt.Println("open:", err) | ||
| return | ||
| } | ||
| defer f.Close() | ||
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| img, _, err := image.Decode(f) | ||
| if err != nil { | ||
| fmt.Println("decode:", err) | ||
| return | ||
| } | ||
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| fso, err := os.Create(fileName + "." + to) | ||
| if err != nil { | ||
| fmt.Println("create:", err) | ||
| return | ||
| } | ||
| defer fso.Close() | ||
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| switch { | ||
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| case (from == "jpg" || from == "jpeg") && to == "png": | ||
| jpeg.Encode(fso, img, nil) | ||
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| case from == "png" && (to == "jpg" || to == "jpeg"): | ||
| png.Encode(fso, img) | ||
| } | ||
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| if err := os.Remove(fileName + "." + from); err != nil { | ||
| fmt.Println(err) | ||
| } | ||
| } | ||
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| module image-convert | ||
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| go 1.17 | ||
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| 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 | ||
| ) |
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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= |
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| package main | ||
|
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| import ( | ||
| "image-convert/args" | ||
| "image-convert/convert" | ||
| "strings" | ||
| ) | ||
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| func main() { | ||
| var args = args.ParseArgs() | ||
| var convertList = convert.GetSelectedExtensionPath(args.From, args.Dir) | ||
| for _, v := range convertList { | ||
| convert.ConvertImage(strings.Join(v[:len(v)-1], "."), args.From, args.To) | ||
| } | ||
| } |
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ここは特に主要なロジックがあるわけではないので、別パッケージに分けずにmainパッケージに含めて良さそうです。