Rename environment variables and add legacy support.

As we are no longer HackMD the short tag `HMD` doesn't match anymore. We
move it to the matching prefix `CMD` and inform our users about the
change.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/config/index.js b/lib/config/index.js
index 79330443..760d94a1 100644
--- a/lib/config/index.js
+++ b/lib/config/index.js
@@ -33,6 +33,7 @@ merge(config, debugConfig)
 merge(config, packageConfig)
 merge(config, fileConfig)
 merge(config, require('./oldEnvironment'))
+merge(config, require('./hackmdEnvironment'))
 merge(config, require('./environment'))
 merge(config, require('./dockerSecret'))
 
@@ -122,6 +123,11 @@ for (let i = keys.length; i--;) {
   }
 }
 
+// Notify users about the prefix change and inform them they use legacy prefix for environment variables
+if (Object.keys(process.env).toString().indexOf('HMD_') !== -1) {
+  logger.warn('Using legacy HMD prefix for environment variables. Please change your variables in future. For details see: https://github.com/hackmdio/codimd#environment-variables-will-overwrite-other-server-configs')
+}
+
 // Generate session secret if it stays on default values
 if (config.sessionSecret === 'secret') {
   logger.warn('Session secret not set. Using random generated one. Please set `sessionSecret` in your config.js file. All users will be logged out.')