Copy files by extension in VS Code tasks.json - visual-studio-code

Question

I want to copy, recursively, all files from /src with the extension .json to my /out directory. I currently copy all files in my static folder (regardless of extension) like this, in tasks.json
{
"version": "2.0.0",
"tasks": [
{
"type": "shell",
"label": "copyStatic",
"command" : "cp",
"args": ["-f", "-r", "${workspaceFolder}/src/static", "${workspaceFolder}/out/"],
}
]
}
I tried using the /**/ notation I'd seen elsewhere like this
{
"version": "2.0.0",
"tasks": [
{
"type": "shell",
"label": "copyJson",
"command" : "cp",
"args": ["-f", "-r", "${workspaceFolder}/src/**/*.json", "${workspaceFolder}/out/"],
}
]
}
But it didn't work - got an error cp: /src/**/*.json: No such file or directory
Any ideas how to do this in tasks.json? I want to deep copy so include files like
/src/foo.json --> /out/foo.json
/src/folder/bar.json --> /out/folder/bar.json
Thanks

Answer 1

A gulp solution is quite easy:
const gulp = require("gulp");
function copyJSONFiles() {
return gulp.src('src/**/*.json') // get all the json files from 'src' directory
.pipe(gulp.dest('out')); // move them to the workspace/out directory
}
exports.default = copyJSONFiles;
// /src/foo.json --> /out/foo.json
// /src/folder/bar.json --> /out/folder/bar.json
This file, called gulpfile.js, goes into your workspace folder at the top level. It is triggered with just the gulp command in the terminal.
The out folder will be created and the folder structure under src will be preserved within it.
As I said in my comment on October 13
"command" : "find ./async -name '*.json' -exec cp --parents {} out/ ';'",
will preserve the folder structure of the src directory (here async) but unfortunately under out/async. That is the purpose of the --parents option.
However, not using the --parents options results in just a flat folder of json files which it doesn't seem you want.
There is probably a pure script version that will flatten that parent folder removing the src folder therein. But the gulp version is awfully easy.

Answer 2

Complex queries can be quite hard to achieve with cp. Fortunately,find searches recursively by default, and can be used in combination with an -exec cp to actually copy these files.
The following command does the trick:
"command" : "find src/ -name "*.json" -exec cp {} out/ \;"