Both hooks read their host (and matrix its database password) back out of the
deployed docker-compose.yml. That cannot work: install_post_compose runs after
the compose TEMPLATE is copied but before dockerConfigSetupFileWithData fills
the tags, so at that point the file still holds raw placeholders. Matrix aborted
with "Database password was not generated in the compose file" even though the
password had been generated correctly — it just was not in the compose yet.
Derive the host from port_subdomains[0] + domain_full instead, both already in
scope from variables_init_app, applying the same empty/@/root rule as
tagsProcessorPortSubdomains so the computed name and the Traefik rule generated
later cannot drift apart. Matrix takes its database password from
CFG_MATRIX_DB_PASSWORD_1, which is where the secret is generated and remembered
and is the same variable the compose tag is filled from a step later.
The error messages now name the actual missing thing — the domain — rather than
blaming the compose file.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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