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中定義了一些變量，在配置任務(wù)腳本時，可能會用到。本文以launch.json腳本為例，介紹各個變量的含義。

假設(shè)當(dāng)前workspace的路徑為:"C:\Users\admin\Desktop\test"，workspace文件夾下的結(jié)構(gòu)如下（+表示下一層）：

C:\Users\admin\Desktop\test

+.vscode

  ++tasks.json

  ++launch.json

+main.cpp

${workspaceFolder} :表示當(dāng)前workspace文件夾路徑，也即C:\Users\admin\Desktop\test

${workspaceRootFolderName}:表示workspace的文件夾名，也即test

${file}:文件自身的絕對路徑，也即C:\Users\admin\Desktop\test\.vscode\launch.json

${relativeFile}:文件在workspace中的路徑，也即.vscode\launch.json

${fileBasenameNoExtension}:當(dāng)前文件的文件名，不帶后綴，也即launch

${fileBasename}:當(dāng)前文件的文件名，launch.json

${fileDirname}:文件所在的文件夾路徑，也即C:\Users\admin\Desktop\test\.vscode

${fileExtname}:當(dāng)前文件的后綴，也即.json

${lineNumber}:當(dāng)前文件光標(biāo)所在的行號

${env:PATH}:系統(tǒng)中的環(huán)境變量

更新一個鏈接：https://code.visualstudio.com/docs/editor/variables-reference

總結(jié)

到此這篇關(guān)于VSCode launch.json中的各種替換變量的意思 ${workspaceFolder} ${file} ${fileBasename} ${fileDirname}等的文章就介紹到這了,更多相關(guān)VSCode launch.json 替換變量內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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