Discovered live: upgrading the test server to v0.2.0 crash-looped with
"rules: read dir: open .: no such file or directory". Its
/etc/deklarix/deklarix.env predates RULES_DIR entirely (created on
first install, before that variable existed) — postinst never
overwrites an existing env file, by design, so the variable was simply
missing rather than set. main.go's relative default "rules" then
resolved against WorkingDirectory=/var/lib/deklarix instead of the
actual install path (/usr/share/deklarix/rules).
postinst now appends RULES_DIR with its packaged default whenever it's
absent, on both fresh installs and upgrades — never overwriting an
existing value. Same healing pattern enconf uses for DB_SSLMODE.
Verified: reinstalling over the broken config fixed it and the service
came back up.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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