cli now supports --long-opts. improved help / usage information

README.md

@@ -1,10 +1,8 @@
 ## TODO
 
 - README
-- improve CLI interface
-- allow multiple reporters
-- better docs, including reporters (--docs)
 - config file support
 - config file auto-generation
 - load custom/contrib metrics and reporters
-- same metric multiple times (e.g. disk_usage for multiple devices)
+- same metric multiple times? (e.g. disk_usage for multiple devices)
+- allow multiple reporters?

metrics.sh

@@ -2,7 +2,7 @@
 
 # config
 INTERVAL=2
-REPORTER=stdout # TODO: handle multiple reporters
+REPORTER=stdout
 
 # env
 LC_ALL=en_US.UTF-8
@@ -15,38 +15,56 @@ opt_docs=false
 opt_verbose=false
 
 usage () {
-  echo "Usage: $0 [-d] [-h] [-v] [-r reporter] [-i interval]"
+  echo "  Usage: $0 [-d] [-h] [-v] [-r reporter] [-i interval]"
 }
 
 help () {
-  echo "TODO"
+  echo
+  usage
+  echo
+  echo "  Options: "
+  echo
+  echo "    -r, --reporter <reporter>  use specified reporter (default: stdout)"
+  echo "    -i, --interval <seconds>   collect metrics every n seconds (default: 2)"
+  echo "    -v, --verbose              enable verbose mode"
+  echo "    -d, --docs                 show documentation"
+  echo "    -h, --help                 show this text"
+  echo
 }
 
-while getopts "$opts_spec" opt; do
-  case "${opt}" in
-    d)
+while [ $# -gt 0 ]; do
+  case $1 in
+    -r|--reporter)
+      shift
+      REPORTER=$1
+      ;;
+
+    -i|--interval)
+      shift
+      INTERVAL=$1
+      ;;
+
+    -v|-verbose)
+      opt_verbose=true
+      ;;
+
+    -d|--docs)
       opt_docs=true
       ;;
-    h)
+
+    -h|--help)
       help
       exit
       ;;
-    v)
-      opt_verbose=true
-      ;;
-    r)
-      REPORTER=$OPTARG
-      ;;
-    i)
-      INTERVAL=$OPTARG
-      ;;
+
     *)
       usage
       exit 1
       ;;
   esac
+
+  shift
 done
-shift $((OPTIND-1))
 
 
 # run

metrics/disk_io.sh

@@ -37,5 +37,5 @@ terminate () {
 
 docs () {
   echo "Disk I/O in MB/s."
-  echo "\$DISK_IO_MOUNTPOINT=$DISK_IO_MOUNTPOINT"
+  echo "\$DISK_IO_MOUNTPOINT="
 }

metrics/disk_usage.sh

@@ -17,5 +17,5 @@ collect () {
 
 docs () {
   echo "Disk usage percentage for a file system at a given mount point."
-  echo "\$DISK_USAGE_MOUNTPOINT=$DISK_USAGE_MOUNTPOINT"
+  echo "\$DISK_USAGE_MOUNTPOINT="
 }

metrics/network_io.sh

@@ -39,5 +39,5 @@ collect () {
 
 docs () {
   echo "Network traffic in kB/s."
-  echo "\$NETWORK_IO_INTERFACE=$NETWORK_IO_INTERFACE"
+  echo "\$NETWORK_IO_INTERFACE="
 }

reporters/file.sh

@@ -20,5 +20,5 @@ report () {
 
 docs () {
   echo "Write to a file or named pipe."
-  echo "\$FILE_LOCATION=$FILE_LOCATION"
+  echo "\$FILE_LOCATION="
 }

reporters/influxdb.sh

@@ -34,5 +34,5 @@ report () {
 docs () {
   echo "Send data to InfluxDB."
   echo "\$INFLUXDB_API_ENDPOINT="
-  echo "\$INFLUXDB_SEND_HOSTNAME=$INFLUXDB_SEND_HOSTNAME"
+  echo "\$INFLUXDB_SEND_HOSTNAME=true"
 }

reporters/keen_io.sh

@@ -33,5 +33,5 @@ docs () {
   echo "Send data to Keen IO (https://keen.io)."
   echo "\$KEEN_IO_WRITE_KEY=<write_key>"
   echo "\$KEEN_IO_PROJECT_ID=<project_id>"
-  echo "\$KEEN_IO_EVENT_COLLECTION=$KEEN_IO_EVENT_COLLECTION"
+  echo "\$KEEN_IO_EVENT_COLLECTION=$HOSTNAME"
 }