node-gyp: run binding.gyp in all subdirectories - node.js

Question

I'm developing a big node.js project which also includes several native libraries.
To use these libraries in JavaScript I'm compiling them to node addons (.node) using node-gyp.
I'd like to run node-gyp once from the root directory to compile all the available binding.gyp recursively (in all the subdirectories).
Is there any way to do that?

Answer 1

GYP allows to set a list of dependencies for a target. You can create a target of type: none in the top-level bindings.gyp and list there dependencies from subdirectories:
{
'targets': [
{
'target_name': 'build_all',
'type': 'none',
'dependencies': ['subdir1/bindings.gyp:*', 'subdir/subdir2/bindings.gyp:*'],
# or generate dependencies list with a command expansion
'dependencies': ['<!#(find -mindepth 2 -name binding.gyp | sed -e s/$/:*/)'],
}
]
}
This will compile all the dependencies and put them into build/ directory in the root.
For putting each addon in its corresponding directory, add a postbuild target inside the addon's binding.gyp:
{
"targets": [
{
"target_name": "my-target",
"sources": [ "example.cpp" ]
},
{
"target_name": "action_after_build",
"type": "none",
"dependencies": [ "my-target" ],
"copies": [
{
"files": [ "<(PRODUCT_DIR)/my-target.node" ],
"destination": "."
}
]
}
]
}

Answer 2

I didn't find any option to do this with just node-gyp, but one of the possible solutions is doing this in a script.
For example, adding the following to the package.json in the root folder:
"scripts": {
"install": "find ./app/* -name binding.gyp -execdir node-gyp rebuild ;"
}
This will cause all the native addons to compile when running npm install in the root folder.

Answer 3

An alternative to the other answers which seems to work so far (without ever having to update binding.gyp):
{
"targets": [
{
"target_name": "addon",
"sources": [
"<!#(node -p \"var fs=require('fs'),path=require('path'),walk=function(r){let t,e=[],n=null;try{t=fs.readdirSync(r)}catch(r){n=r.toString()}if(n)return n;var a=0;return function n(){var i=t[a++];if(!i)return e;let u=path.resolve(r,i);i=r+'/'+i;let c=fs.statSync(u);if(c&&c.isDirectory()){let r=walk(i);return e=e.concat(r),n()}return e.push(i),n()}()};walk('./sources').join(' ');\")"
]
}
]
}
(from https://stackoverflow.com/a/60947528/2016831)