add logging module

1 files changed, 38 insertions, 0 deletions

diff --git a/lib/log.sh b/lib/log.sh
new file mode 100644
index 0000000..f204d7e
--- /dev/null
+++ b/lib/log.sh
@@ -0,0 +1,38 @@
+function log() {
+	local log_level=0
+	local log_level_string=""
+
+	case $1 in
+		debug)
+			log_level=0
+			log_level_string="[DBG]"
+			;;
+		verbose)
+			log_level=1
+			log_level_string="[VRB]"
+			;;
+		info)
+			log_level=2
+			log_level_string="[INF]"
+			;;
+		warn)
+			log_level=3
+			log_level_string="[WRN]"
+			;;
+		error)
+			log_level=4
+			log_level_string="[ERR]"
+			;;
+	esac
+	shift
+
+	# set the log level to info if unset
+	[[ -z "DOT_LOG_LEVEL" ]] && DOT_LOG_LEVEL=2
+
+	# if this is too verbose, stop now
+	[[ "$DOT_LOG_LEVEL" -gt "$level" ]] && return
+
+	[[ -n "$_modulename" ]] && module="[$_modulename]: " || module=""
+
+	echo "$log_level_string $module$@"
+}