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Only import jinja2 when needed (#5514)

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Fixes https://github.com/matrix-org/synapse/issues/5431

`jinja2` was being imported even when it wasn't strictly necessary. This made it required to run Synapse, even if the functionality that required it wasn't enabled. This was causing new Synapse installations to crash on startup.

Email modules are now required.
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Andrew Morgan 2019-06-21 16:52:09 +01:00 committed by GitHub
parent 0e8b35f7b0
commit 5d6644efe0
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changelog.d/5514.bugfix Normal file
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@ -0,0 +1 @@
Fix bug with `jinja2` preventing Synapse from starting. Users who had this problem should now simply need to run `pip install matrix-synapse`.

3
synapse/python_dependencies.py
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@ -72,10 +72,11 @@ REQUIREMENTS = [
# Twisted 18.7.0 requires attrs>=17.4.0
"attrs>=17.4.0",
"netaddr>=0.7.18",
"Jinja2>=2.9",
"bleach>=1.4.3",
]
CONDITIONAL_REQUIREMENTS = {
"email": ["Jinja2>=2.9", "bleach>=1.4.3"],
"matrix-synapse-ldap3": ["matrix-synapse-ldap3>=0.1"],
# we use execute_batch, which arrived in psycopg 2.7.
"postgres": ["psycopg2>=2.7"],