add defaults() fn. add --print-config. config loader now fails on error

reporters/file.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-init () {
+start () {
   if [ -z $FILE_LOCATION ]; then
     echo "Error: file reporter requires \$FILE_LOCATION to be specified"
     exit 1
@@ -20,5 +20,5 @@ report () {
 
 docs () {
   echo "Write to a file or named pipe."
-  echo "\$FILE_LOCATION="
+  echo "FILE_LOCATION=$FILE_LOCATION"
 }

reporters/influxdb.sh

@@ -1,15 +1,17 @@
 #!/bin/sh
 
-init () {
+defaults () {
+  if [ -z $INFLUXDB_SEND_HOSTNAME ]; then
+    INFLUXDB_SEND_HOSTNAME=true
+  fi
+}
+
+start () {
   if [ -z $INFLUXDB_API_ENDPOINT ]; then
     echo "Error: influxdb requires \$INFLUXDB_API_ENDPOINT to be specified"
     exit 1
   fi
 
-  if [ -z $INFLUXDB_SEND_HOSTNAME ]; then
-    INFLUXDB_SEND_HOSTNAME=true
-  fi
-
   if [ "$INFLUXDB_SEND_HOSTNAME" = true ]; then
     __influxdb_columns="[\"value\",\"host\"]"
     __influxdb_hostname=$(hostname)
@@ -34,6 +36,6 @@ report () {
 
 docs () {
   echo "Send data to InfluxDB."
-  echo "\$INFLUXDB_API_ENDPOINT="
-  echo "\$INFLUXDB_SEND_HOSTNAME=true"
+  echo "INFLUXDB_API_ENDPOINT=$INFLUXDB_API_ENDPOINT"
+  echo "INFLUXDB_SEND_HOSTNAME=$INFLUXDB_SEND_HOSTNAME"
 }

reporters/keen_io.sh

@@ -1,6 +1,12 @@
 #!/bin/sh
 
-init() {
+defaults () {
+  if [ -z $KEEN_IO_EVENT_COLLECTION ]; then
+    KEEN_IO_EVENT_COLLECTION=$(hostname)
+  fi
+}
+
+start() {
   if [ -z $KEEN_IO_PROJECT_ID ]; then
     echo "Error: keen_io requires \$KEEN_IO_PROJECT_ID to be specified"
     exit 1
@@ -11,10 +17,6 @@ init() {
     exit 1
   fi
 
-  if [ -z $KEEN_IO_EVENT_COLLECTION ]; then
-    KEEN_IO_EVENT_COLLECTION=$(hostname)
-  fi
-
   __keen_io_api_url="https://api.keen.io/3.0"
   __keen_io_api_url="$__keen_io_api_url/projects/$KEEN_IO_PROJECT_ID"
   __keen_io_api_url="$__keen_io_api_url/events/$KEEN_IO_EVENT_COLLECTION"
@@ -31,7 +33,7 @@ report () {
 
 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=$(hostname)"
+  echo "KEEN_IO_WRITE_KEY=$KEEN_IO_WRITE_KEY"
+  echo "KEEN_IO_PROJECT_ID=$KEEN_IO_PROJECT_ID"
+  echo "KEEN_IO_EVENT_COLLECTION=$KEEN_IO_EVENT_COLLECTION"
 }

reporters/stathat.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-init () {
+start () {
   if [ -z $STATHAT_API_KEY ]; then
     echo "Error: stathat requires \$STATHAT_API_KEY to be specified"
     exit 1
@@ -17,5 +17,5 @@ report () {
 
 docs () {
   echo "Send data to StatHat (https://www.stathat.com)."
-  echo "\$STATHAT_API_KEY=<ez_key>"
+  echo "STATHAT_API_KEY=$STATHAT_API_KEY"
 }

reporters/stdout.sh

@@ -8,5 +8,5 @@ report () {
 }
 
 docs () {
-  echo "Print to standard output (e.g. the TTY you're running the script in)"
+  echo "Print to standard output, e.g. the TTY you're running the script in."
 }