浅析VSCode launch.json中的各种替换变量的意思 ${workspaceFolder} ${file} ${fileBasename} ${fileDirname}等

VS Code supports variable substitution inside strings in launch.json and has the following predefined variables:

  • ${workspaceFolder} - the path of the folder opened in VS Code
  • ${workspaceRootFolderName} - the name of the folder opened in VS Code without any slashes (/)
  • ${file} - the current opened file
  • ${relativeFile} - the current opened file relative to workspaceRoot
  • ${fileBasename} - the current opened file's basename
  • ${fileBasenameNoExtension} - the current opened file's basename with no file extension
  • ${fileDirname} - the current opened file's dirname
  • ${fileExtname} - the current opened file's extension
  • ${cwd} - the task runner's current working directory on startup
  • ${lineNumber} - the current selected line number in the active file

You can also reference environment variables through ${env:Name} syntax (for example, ${env:PATH}). Be sure to match the environment variable name's casing, for example ${env:Path} on Windows.

{
 "type": "node",
 "request": "launch",
 "name": "Launch Program",
 "program": "${workspaceFolder}/app.js",
 "cwd": "${workspaceFolder}",
 "args": [ "${env:USERNAME}" ]
}

You can reference VS Code settings and commands using the following syntax:

  • ${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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发布时间 2020-03-20 12:01:00
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