feat: a3 and other things

lib/logger

@@ -1,16 +1,36 @@
 #!/bin/sh
 
-__sc_log() {
-    level=$1; shift
-    echo "[$level] $@"
+# levels:
+# DEBUG = 0
+# INFO  = 1
+# WARN  = 2
+# ERROR = 3
+SC_LOGGER_LEVEL=${SC_LOGGER_LEVEL:-1}
+
+__sc_log_level_to_text() {
+    case $1 in
+    0) echo "debug" ;;
+    1) echo "info" ;;
+    2) echo "warn" ;;
+    3) echo "error" ;;
+    4) echo "fatal" ;;
+    esac
 }
 
-alias LOGD="__sc_log debug"
-alias LOGI="__sc_log info"
-alias LOGW="__sc_log warn"
-alias LOGE="__sc_log error"
+__sc_log() {
+    level=$1
+    shift
+    if [ "$level" -ge "$SC_LOGGER_LEVEL" ]; then
+        echo "[$(__sc_log_level_to_text $level)] $@"
+    fi
+}
+
+alias LOGD="__sc_log 0"
+alias LOGI="__sc_log 1"
+alias LOGW="__sc_log 2"
+alias LOGE="__sc_log 3"
 
 fatal_log() {
-    __sc_log fatal $@
+    __sc_log 4 $@
     exit 1
-}
+}