Libsession-util NodeJS

This library is the wrappers around libsession-util for NodeJS. It is built using the node-addon-api and cmake-js. The build and dev instructions are quite custom, so check them out below.

Issue with yarn

The yarn package manager (used on session-desktop) does understand what is a git url in a dependency as part of a package.json file, but won't do a full clone including submodules when forking such a repository. For more details, see yarnpkg/yarn#1488

We tried using cmake-js and node's preinstall scripts to make this happen, but with the different platforms (linux, windows and macOS) having their own issues it turned out to be a nightmare.

Having lost enough time on this for now, I've decided to instead of relying of git submodules being fetched before the compilation can happen, I would generate a release tarball which includes the git modules and add that tarball dependency in the package.json of session-desktop.

Dev instructions

Clone this project to somewhere not part of session-desktop node_modules:

cd [FOLDER_NOT_IN_SESSION_DESKTOP]
git clone --recursive git@github.com:session-foundation/libsession-util-nodejs.git

Always do your changes in [FOLDER_NOT_IN_SESSION_DESKTOP]/libsession-util-nodejs, never in the one under session-desktop's node_modules as you might override your local changes. Then, you can quickly compile a non-electron build by running yarn cmake-js from that folder. This is a quick incremental build which can check for C++ compilation errors. Once your changes are ready to be tested in the session-desktop you can compile an electron build using this command:

cd [SESSION_DESKTOP_PATH]; rm -rf node_modules/libsession_util_nodejs; cp -R [THIS_PROJECT_PATH] node_modules/libsession_util_nodejs; cd node_modules/libsession_util_nodejs && rm -rf build && yarn install && cd [SESSION_DESKTOP_PATH] && yarn build:workers

Replace [SESSION_DESKTOP_PATH] with the full path to your session-desktop folder, replace [THIS_PROJECT_PATH] with the path to the root of this project folder.

Every part of this command is needed and might need to be updated using your paths. Also, the worker:libsession needs to be recompiled too to include the just created .node file in itself. This is done by the yarn build:workers command.

Note: The electron property in the config object will need to be updated in the package.json every time we update electron package in session-desktop so that the versions match. It is a node version, but not part of the official node docs. If you compiled the node module for an incorrect electron/node version you will get an error on session-desktop start.

Making a Release and updating Session-desktop

1. First, make sure all your changes are commited and pushed to the libsession-util-nodejs project from your [FOLDER_NOT_IN_SESSION_DESKTOP] folder.

2. Then make sure the libsession-util is using the latest dev branch (unless there is a reason not to).

3. Then, bump the version in the package.json of the nodejs wrapper.

   • A patch version bump is required only if you have changed the implementation of an existing function or doing a hot fix for libsession version used by session-desktop.

   • A minor version bump is required if you have added a new function or changed the signature of an existing one.

Then, run these commands:

# bump the version in the package.json
git add .
git commit
git push upstream main
# Make sure you do the steps above, otherwise the tag won't be on the right commit with the `gh release create`

virtualenv venv
source venv/bin/activate
pip install git-archive-all
PACKAGE_VERSION=$(cat package.json | grep version | head -1 | awk -F: '{ print $2 }' | sed 's/[", ]//g')
echo $PACKAGE_VERSION
python3 build_release_archive.py libsession_util_nodejs-v$PACKAGE_VERSION.tar.gz
gh release create v$PACKAGE_VERSION -t v$PACKAGE_VERSION --latest --generate-notes
gh release upload v$PACKAGE_VERSION libsession_util_nodejs-v$PACKAGE_VERSION.tar.gz

And then upload the generated libsession_util_nodejs-v$PACKAGE_VERSION.tar.gz to that release just created on github. The git-archive-all relies on the .gitattributes to know what to include or exclude.

Once this is done, update the dependency on session-desktop. Make sure to remove the existing one first (with the include yarn remove below) as you might have messed up your node_modules doing the dev instructions.

yarn remove libsession_util_nodejs && yarn add https://github.com/session-foundation/libsession-util-nodejs/releases/download/v0.1.15/libsession_util_nodejs-v0.1.15.tar.gz

Keep in mind that you need to update the two version numbers (e.g. 0.1.15) to the just created release version of this project.

The cmake-js script will be run on the yarn add and should recompile your latest release of the libsession-util-nodejs as part of the build process and as part of the github actions on session-desktop. You most likely need to recompile the workers to include those new changes: yarn worker:utils && yarn worker:libsession.

You should have your changes in the next release!