Enable overriding configuration using environment variables

git-ommix

@@ -10,6 +10,9 @@ IFS=$'\n\t'
 # Load git ommix functions
 # Load global and local settings if they exist
 
+# Save env variables
+envs=$(env | grep ^GIT_OMMIX)
+
 TEST_OMMIX="${TEST_OMMIX:-}"
 if [[ "$TEST_OMMIX" ]]; then
     source $(dirname $0)/functions
@@ -20,6 +23,9 @@ fi
 [[ -f "/etc/gitommix.conf" ]] && source "/etc/gitommix.conf"
 [[ -f "$HOME/.config/gitommix.conf" ]] && source "$HOME/.config/gitommix.conf"
 
+# Restore env variables after config load
+eval $envs
+
 ###############################################################################
 # Parse arguments
 # Initialize default values
@@ -38,8 +44,8 @@ PROVIDER="${PROVIDER:-}"
 METHOD=
 PATIENT="${PATIENT:-}"
 SAMPLE="${SAMPLE:-}"
-DATE=`date +'%Y-%m-%dT%H:%M:%S'`
-ID=`base64 /dev/urandom | tr --delete "/+=" | head --bytes=10`
+DATE="${DATE:-$(date +'%Y-%m-%dT%H:%M:%S')}"
+ID=$(base64 /dev/urandom | tr --delete "/+=" | head --bytes=10)
 INVALIDATE=()
 USE=()
 REVISION_OF=