浅析VSCode launch.json中的各种替换变量的意思 ${workspaceFolder} ${file} ${fileBasename} ${fileDirname}等
VSCodesupportsvariablesubstitutioninsidestringsinlaunch.jsonandhasthefollowingpredefinedvariables:
- ${workspaceFolder}-thepathofthefolderopenedinVSCode
- ${workspaceRootFolderName}-thenameofthefolderopenedinVSCodewithoutanyslashes(/)
- ${file}-thecurrentopenedfile
- ${relativeFile}-thecurrentopenedfilerelativetoworkspaceRoot
- ${fileBasename}-thecurrentopenedfile'sbasename
- ${fileBasenameNoExtension}-thecurrentopenedfile'sbasenamewithnofileextension
- ${fileDirname}-thecurrentopenedfile'sdirname
- ${fileExtname}-thecurrentopenedfile'sextension
- ${cwd}-thetaskrunner'scurrentworkingdirectoryonstartup
- ${lineNumber}-thecurrentselectedlinenumberintheactivefile
Youcanalsoreferenceenvironmentvariablesthrough${env:Name}syntax(forexample,${env:PATH}).Besuretomatchtheenvironmentvariablename'scasing,forexample${env:Path}onWindows.
{
"type":"node",
"request":"launch",
"name":"LaunchProgram",
"program":"${workspaceFolder}/app.js",
"cwd":"${workspaceFolder}",
"args":["${env:USERNAME}"]
}
YoucanreferenceVSCodesettingsandcommandsusingthefollowingsyntax:
- ${config:Name}-example:${config:editor.fontSize}
- ${command:CommandID}-example:${command:explorer.newFolder}
在vscode中定义了一些变量，在配置任务脚本时，可能会用到。本文以launch.json脚本为例，介绍各个变量的含义。
假设当前workspace的路径为:"C:\Users\admin\Desktop\test"，workspace文件夹下的结构如下（+表示下一层）：
C:\Users\admin\Desktop\test
+.vscode
++tasks.json
++launch.json
+main.cpp
${workspaceFolder}:表示当前workspace文件夹路径，也即C:\Users\admin\Desktop\test
${workspaceRootFolderName}:表示workspace的文件夹名，也即test
${file}:文件自身的绝对路径，也即C:\Users\admin\Desktop\test\.vscode\launch.json
${relativeFile}:文件在workspace中的路径，也即.vscode\launch.json
${fileBasenameNoExtension}:当前文件的文件名，不带后缀，也即launch
${fileBasename}:当前文件的文件名，launch.json
${fileDirname}:文件所在的文件夹路径，也即C:\Users\admin\Desktop\test\.vscode
${fileExtname}:当前文件的后缀，也即.json
${lineNumber}:当前文件光标所在的行号
${env:PATH}:系统中的环境变量
更新一个链接：https://code.visualstudio.com/docs/editor/variables-reference
总结
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