Kadai2 imura81gt

kadai1/imura81gt/.devcontainer/Dockerfile

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+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+FROM golang:1
+
+# Avoid warnings by switching to noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
+
+# This Dockerfile adds a non-root 'vscode' user with sudo access. However, for Linux,
+# this user's GID/UID must match your local user UID/GID to avoid permission issues
+# with bind mounts. Update USER_UID / USER_GID if yours is not 1000. See
+# https://aka.ms/vscode-remote/containers/non-root-user for details.
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Configure apt, install packages and tools
+RUN apt-get update \
+    && apt-get -y install --no-install-recommends apt-utils dialog 2>&1 \
+    #
+    # Verify git, process tools, lsb-release (common in install instructions for CLIs) installed
+    && apt-get -y install git iproute2 procps lsb-release \
+    #
+    # Install gocode-gomod
+    && go get -x -d github.com/stamblerre/gocode 2>&1 \
+    && go build -o gocode-gomod github.com/stamblerre/gocode \
+    && mv gocode-gomod $GOPATH/bin/ \
+    #
+    # Install Go tools
+    && go get -u -v \
+        github.com/mdempsky/gocode \
+        github.com/uudashr/gopkgs/cmd/gopkgs \
+        github.com/ramya-rao-a/go-outline \
+        github.com/acroca/go-symbols \
+        github.com/godoctor/godoctor \
+        golang.org/x/tools/cmd/guru \
+        golang.org/x/tools/cmd/gorename \
+        github.com/rogpeppe/godef \
+        github.com/zmb3/gogetdoc \
+        github.com/haya14busa/goplay/cmd/goplay \
+        github.com/sqs/goreturns \
+        github.com/josharian/impl \
+        github.com/davidrjenni/reftools/cmd/fillstruct \
+        github.com/fatih/gomodifytags \
+        github.com/cweill/gotests/... \
+        golang.org/x/tools/cmd/goimports \
+        golang.org/x/lint/golint \
+        golang.org/x/tools/cmd/gopls \
+        github.com/alecthomas/gometalinter \
+        honnef.co/go/tools/... \
+        github.com/golangci/golangci-lint/cmd/golangci-lint \
+        github.com/mgechev/revive \
+        github.com/derekparker/delve/cmd/dlv 2>&1 \
+    #
+    # Create a non-root user to use if preferred - see https://aka.ms/vscode-remote/containers/non-root-user.
+    && groupadd --gid $USER_GID $USERNAME \
+    && useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    # [Optional] Add sudo support
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME \
+    #
+    # Clean up
+    && apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/*

kadai1/imura81gt/.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/vscode-remote/devcontainer.json or the definition README at
+// https://github.com/microsoft/vscode-dev-containers/tree/master/containers/go
+{
+	"name": "Go",
+	"dockerFile": "Dockerfile",
+	"runArgs": [
+		// Uncomment the next line to use a non-root user. On Linux, this will prevent
+		// new files getting created as root, but you may need to update the USER_UID
+		// and USER_GID in .devcontainer/Dockerfile to match your user if not 1000.
+		// "-u", "vscode",
+
+		"--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined"
+	],
+
+	// Use 'settings' to set *default* container specific settings.json values on container create. 
+	// You can edit these settings after create using File > Preferences > Settings > Remote.
+	"settings": { 
+		"terminal.integrated.shell.linux": "/bin/bash",
+		"go.gopath": "/go"
+	},
+
+	// Uncomment the next line if you want to publish any ports.
+	// "appPort": [],
+
+	// Uncomment the next line to run commands after the container is created.
+	// "postCreateCommand": "go version",
+
+	// Add the IDs of extensions you want installed when the container is created in the array below.
+	"extensions": [
+		"ms-vscode.go"
+	]
+}

kadai1/imura81gt/README.md

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+Convert Image
+================================================================================
+
+TOC
+--------------------------------------------------------------------------------
+- [Convert Image](#convert-image)
+  - [TOC](#toc)
+  - [Q. 【TRY】画像変換コマンドを作ろう](#q-try画像変換コマンドを作ろう)
+  - [Links](#links)
+    - [About filepath](#about-filepath)
+    - [About image](#about-image)
+  - [Build](#build)
+  - [Usage](#usage)
+  - [Test Data](#test-data)
+  - [Example](#example)
+    - [e.g. use no option](#eg-use-no-option)
+    - [e.g. use option](#eg-use-option)
+
+Q. 【TRY】画像変換コマンドを作ろう
+--------------------------------------------------------------------------------
+
+次の仕様を満たすコマンドを作って下さい
+
+- [x] 1. ディレクトリを指定する
+- [x] 2. 指定したディレクトリ以下のJPGファイルをPNGに変換（デフォルト）
+- [x] 3. ディレクトリ以下は再帰的に処理する
+- [x] 4. 変換前と変換後の画像形式を指定できる（オプション）
+
+以下を満たすように開発してください
+
+- [x] 5. mainパッケージと分離する
+- [x] 6. 自作パッケージと標準パッケージと準標準パッケージのみ使う
+  - 準標準パッケージ：golang.org/x以下のパッケージ
+- [x] 8. ユーザ定義型を作ってみる
+- [x] 9. GoDocを生成してみる
+
+
+Links
+--------------------------------------------------------------------------------
+
+### About filepath
+
+- https://golang.org/pkg/path/filepath/
+
+### About image
+
+- [Package image](https://golang.org/pkg/image/)
+    - [gif](https://golang.org/pkg/image/gif/)
+    - [jpeg](https://golang.org/pkg/image/jpeg/)
+    - [png](https://golang.org/pkg/image/png/)
+    - get format
+        - [DecodeConfig](https://golang.org/pkg/image/#DecodeConfig)
+- [The Go Blog](https://blog.golang.org/)
+    - [The Go image package](https://blog.golang.org/go-image-package#TOC_5.)
+
+
+Go doc
+--------------------------------------------------------------------------------
+
+```
+$ go doc github.com/gopherdojo/dojo7/kadai1/imura81gt/imgconv/img
+package img // import "github.com/gopherdojo/dojo7/kadai1/imura81gt/imgconv/img"
+
+func AllImageFiles(dirs []string) (files []string)
+func Convert(r io.Reader, w io.Writer, t string) error
+func ConvertAll(dirs []string, iType ImageType, oType ImageType) error
+func ExpectedImageFiles(files []string, iType ImageType) (f []string)
+func IsExpectedImage(path string, iType ImageType) bool
+func IsImage(path string) bool
+type ImageType struct{ ... }
+```
+
+OR
+
+```
+cd $(go env GOPATH)/src/github.com/gopherdojo/dojo7/kadai1/imura81gt/imgconv
+godoc -http=:8080
+```
+
+http://localhost:8080/pkg/github.com/gopherdojo/dojo7/kadai1/imura81gt/imgconv/img/
+
+Build
+--------------------------------------------------------------------------------
+
+```
+cd $(go env GOPATH)/src/github.com/gopherdojo/dojo7/kadai1/imura81gt/imgconv
+GO111MODULE=on go build
+```
+
+Usage
+--------------------------------------------------------------------------------
+
+```
+$ ./imgconv
+./imgconv <option> dir1 dir2 dir3
+option:
+  -G    convert to gif.
+  -J    convert to jpeg.
+  -P    convert to png.
+  -g    inpt files are gif.
+  -j    inpt files are jpeg.
+  -p    inpt files are png.
+```
+
+
+Test Data
+--------------------------------------------------------------------------------
+
+```
+$ tree testdata/
+testdata/
+├── chdir
+│   ├── gLenna.gif
+│   ├── jLenna.jpeg
+│   └── pLenna.png
+├── gLenna.gif
+├── jLenna.jpg
+├── pLenna.png
+├── this_is_not_image.gif
+├── this_is_not_image.jpg
+└── this_is_not_image.png
+
+1 directory, 9 files
+$
+```
+
+
+Example
+--------------------------------------------------------------------------------
+
+### e.g. use no option
+
+```
+$ ./imgconv testdata/
+```
+
+In stdout, the command output input files and output files.
+
+```
+["testdata/chdir/jLenna.jpeg" "testdata/jLenna.jpg"]
+["output/png/testdata/chdir/jLenna.png" "output/png/testdata/jLenna.png"]
+```
+
+```
+$ tree output/
+output/
+└── png
+    └── testdata
+        ├── chdir
+        │   └── jLenna.png
+        └── jLenna.png
+$
+```
+
+### e.g. use option
+
+- input: png, jpeg
+- output: gif
+
+```
+$ ./imgconv testdata/ -p -j -G
+```
+
+In stdout, the command output input files and output files.
+
+```
+
+["testdata/chdir/jLenna.jpeg" "testdata/chdir/pLenna.png" "testdata/jLenna.jpg" "testdata/pLenna.png"]
+["output/gif/testdata/chdir/jLenna.gif" "output/gif/testdata/chdir/pLenna.gif" "output/gif/testdata/jLenna.gif" "output/gif/testdata/pLenna.gif"]
+```
+
+```
+$ tree output/
+output/
+└── gif
+    └── testdata
+        ├── chdir
+        │   ├── jLenna.gif
+        │   └── pLenna.gif
+        ├── jLenna.gif
+        └── pLenna.gif
+$
+```

kadai1/imura81gt/imgconv/.gitignore

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+output
+imgconv

kadai1/imura81gt/imgconv/go.mod

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+module github.com/gopherdojo/dojo7/kadai1/imura81gt/imgconv
+
+go 1.12

kadai1/imura81gt/imgconv/go.sum

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+github.com/gopherdojo/dojo7 v0.0.0-20190903074013-69385d40c994 h1:UbdhtSFDdFiSYOb/TkEmlRIUFQRrBlKOzVDY3+SXaSw=