浅析VSCode launch.json中的各种替换变量的意思 ${workspaceFolder} ${file} ${fileBasename} ${fileDirname}等
作者:bat67
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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