Q: Is it possible to change the the context in which npm runs scripts?
What I want to is the following:
"scripts": { "test": "gulp mocha", "pre-install": "./deps/2.7/cpython/configure --prefix=$(pwd)/build --exec-prefix=$(pwd)/build && make -C deps/2.7/cpython && make -C deps/2.7/cpython install", "install": "node-gyp rebuild" },
Obviously cd deps/2.7/cpython/ && ./configure
would work on UNIX-like systems but not on windows.
Why: The root of the problem is, that the configure
command of the python repo outputs files into the directory where it is called. The files however are build relevant for make
and make install
which look for the files in the directory of the repo.
In this case I can't change the Makefile
since the build process of Python is understandably complex.
Alternative: The alternative is probably to write some install.js
and use node's OS independent API and some child_process.exec()
, which I am probably gonna do. However, not leaving npm would be really nice.
You can change the current working directory of the Node process through the command process. chdir() . var process = require('process'); process. chdir('../');
You should run it in your project root folder, or the folder above your node_modules folder as sometimes the structure can differentiate between projects. But in general: the root folder of your project, as long as it is one folder above your node_modules.
npm
allows only to do cd dir && command -args
, which will also run on Windows.
A change to use node
's spawn functionality has been made in PR https://github.com/npm/npm/pull/10958, but was rejected, due to the above solution.
As noted above:
npm is probably using
var spawn = require('child_process').spawn
which would allow you to set options like:
{cwd: pwd + 'somepath'}
but isn't exposing it.
I've solved it with a fairly large
install.js
, which does roughly that and it gets called frompackage.json
like above. The API ofchild_process
isn't that easy to handle, though, since it throws loads of hard to debug errors. Took me some time, but I am happy now.
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