Document working in here

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Reid 'arrdem' McKenzie 2021-10-10 21:42:38 -06:00
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@ -11,6 +11,58 @@ And so I'm going the other way; Bazel in a monorepo with subprojects so I'm able
- [Flowmetal](projects/flowmetal)
- [Lilith](projects/lilith)
## Hacking (Ubuntu)
### Step 1 - Install bazel
As usual, Ubuntu's packaging of the Bazel bootstrap script is ... considerably stale.
Add the upstream Bazel ppa so we can get reasonably fresh builds.
``` sh
sudo apt install apt-transport-https curl gnupg
curl -fsSL | gpg --dearmor > bazel.gpg
sudo mv bazel.gpg /etc/apt/trusted.gpg.d/
echo "deb [arch=amd64] stable jdk1.8" | sudo tee /etc/apt/sources.list.d/bazel.list
### Step 2 - Create a canonical `python`
Bazel, sadly, expects that a platform `python` exists for things.
Due to Bazel's plugins model, changing this is miserable.
So just create one.
``` sh
if ! `which python > /dev/null`; then
sudo ln -s `which python3` /usr/bin/python
### Step 3 - Non-hermetic build deps
The way that Bazel's Python toolchain(s) work is that ultimately they go out to the non-hermetic platform.
So, in order to be able to use the good tools we have to have some things on the host filesystem.
``` sh
if [[ "$(sqlite3 --version | awk -F'.' '/^3/ {print $2; exit}')" -lt 35 ]]; then
echo "SQLite 3.35.0 or later (select ... returning support) required"
exit 1
sudo apt install \
python3-setuptools \
postgresql libpq-dev \
sqlite3 libsqlite3-dev
### Working in source
`source` is the key.
It automates a number of tasks -
1. Building a virtualenv
2. Synchronizing the virtualenv from the requirements.txt
3. Updating the virtualenv with all project paths
4. Activating that virtualenv
## License
Copyright Reid 'arrdem' McKenzie, 4/8/2021.

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mkvirtualenv source
workon source
pip install -r tools/python/requirements.txt
for d in $(find . -type d -path "*/src/python"); do
d="$(realpath "${d}")"
echo "Adding subproject ${d}"
add2virtualenv "${d}"