When authoring tasks configurations, it is often useful to have a set of predefined common variables. VS Code supports variable substitution inside strings in the tasks.json file and has the following predefined variables:

• ${workspaceFolder} the path of the workspace folder that contains the tasks.json file
• ${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 the workspace folder containing the file
• ${fileBasename} the current opened file's basename
• ${fileBasenameNoExtension} the current opened file's basename without the 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} (for example, ${env:PATH}). Be sure to match the environment variable name's casing, for example ${env:Path} on Windows.

Below is an example of a custom task configuration that passes the current opened file to the TypeScript compiler.

{
  "taskName": "TypeScript compile",
  "type": "shell",
  "command": "tsc ${file}",
  "problemMatcher": [
    "$tsc"
  ]
}

部分翻譯：（來自互聯(lián)網(wǎng)）

${workspaceRoot} 當(dāng)前打開的文件夾的絕對路徑+文件夾的名字

            ${workspaceRootFolderName}   當(dāng)前打開的文件夾的名字

    ${file}當(dāng)前打開正在編輯的文件名，包括絕對路徑，文件名，文件后綴名

${relativeFile}從當(dāng)前打開的文件夾到當(dāng)前打開的文件的路徑

如 當(dāng)前打開的是test文件夾，當(dāng)前的打開的是main.c，并有test / first / second / main.c

那么此變量代表的是  first / second / main.c

${fileBasename}  當(dāng)前打開的文件名+后綴名，不包括路徑

${fileBasenameNoExtension} 當(dāng)前打開的文件的文件名，不包括路徑和后綴名

${fileDirname} 當(dāng)前打開的文件所在的絕對路徑，不包括文件名

${fileExtname} 當(dāng)前打開的文件的后綴名

${cwd} the task runner's current working directory on startup

不知道怎么描述，這是原文解釋，

跟 cmd 里面的 cwd 是一樣的

${lineNumber}  當(dāng)前打開的文件，光標(biāo)所在的行數(shù)

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

總結(jié)

到此這篇關(guān)于淺析VSCode tasks.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 tasks.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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