Merge pull request #129 from dritter/ram_prompt

Breaking RAM and Swap out of load segment into their own segment.

README.md

@@ -75,11 +75,12 @@ The segments that are currently available are:
 * [dir](#dir) - Your current working directory.
 * **history** - The command number for the current line.
 * [ip](#ip) - Shows the current IP address.
-* **load** - Your machines 5 minute load average and free RAM.
+* **load** - Your machines 5 minute load average.
 * **node_version** - Show the version number of the installed Node.js.
 * **nvm** - Show the version of Node that is currently active, if it differs from the version used by NVM
 * **os_icon** - Display a nice little icon, depending on your operating system.
 * **php_version** - Show the current PHP version.
+* [ram](#ram) - Show free RAM and used Swap.
 * [rbenv](#rbenv) - Ruby environment information (if one is active).
 * [rspec_stats](#rspec_stats) - Show a ratio of test classes vs code classes for RSpec.
 * [status](#status) - The return code of the previous command, and status of background jobs.
@@ -154,6 +155,15 @@ following variable in your `~/.zshrc`.
 
     POWERLEVEL9K_STATUS_VERBOSE=false
 
+##### ram
+
+By default this segment shows you free RAM and used Swap. If you want to show
+only one value, you can specify `POWERLEVEL9K_RAM_ELEMENTS` and set it to either
+`ram_free` or `swap_used`. Full example:
+
+    # Show only used swap:
+    POWERLEVEL9K_RAM_ELEMENTS=(swap_used)
+
 ##### symphony2_tests
 
 See [Unit Test Ratios](#unit-test-ratios), below.

powerlevel9k.zsh-theme

@@ -230,7 +230,8 @@ function print_icon() {
 
 # Converts large memory values into a human-readable unit (e.g., bytes --> GB)
 printSizeHumanReadable() {
-  local size=$1
+  typeset -F 2 size
+  size="$1"+0.00001
   local extension
   extension=(B K M G T P E Z Y)
   local index=1
@@ -245,7 +246,7 @@ printSizeHumanReadable() {
     done
   fi
 
-  while (( (size / 1024) > 0 )); do
+  while (( (size / 1024) > 0.1 )); do
     size=$(( size / 1024 ))
     index=$(( index + 1 ))
   done
@@ -691,22 +692,11 @@ prompt_ip() {
   "$1_prompt_segment" "$0" "cyan" "$DEFAULT_COLOR" "$(print_icon 'NETWORK_ICON') $ip"
 }
 
-set_default POWERLEVEL9K_LOAD_SHOW_FREE_RAM true
 prompt_load() {
   if [[ "$OS" == "OSX" ]]; then
     load_avg_5min=$(sysctl vm.loadavg | grep -o -E '[0-9]+(\.|,)[0-9]+' | head -n 1)
-    if [[ "$POWERLEVEL9K_LOAD_SHOW_FREE_RAM" == true ]]; then
-      ramfree=$(vm_stat | grep "Pages free" | grep -o -E '[0-9]+')
-      # Convert pages into Bytes
-      ramfree=$(( ramfree * 4096 ))
-      base=''
-    fi
   else
     load_avg_5min=$(grep -o "[0-9.]*" /proc/loadavg | head -n 1)
-    if [[ "$POWERLEVEL9K_LOAD_SHOW_FREE_RAM" == true ]]; then
-      ramfree=$(grep -o -E "MemFree:\s+[0-9]+" /proc/meminfo | grep -o "[0-9]*")
-      base=K
-    fi
   fi
 
   # Replace comma
@@ -724,10 +714,6 @@ prompt_load() {
   fi
 
   "$1_prompt_segment" "$0$FUNCTION_SUFFIX" "$BACKGROUND_COLOR" "$DEFAULT_COLOR" "$(print_icon 'LOAD_ICON') $load_avg_5min"
-
-  if [[ "$POWERLEVEL9K_LOAD_SHOW_FREE_RAM" == true ]]; then
-    echo -n "$(print_icon 'RAM_ICON') $(printSizeHumanReadable "$ramfree" $base) "
-  fi
 }
 
 # Node version
@@ -754,6 +740,50 @@ prompt_php_version() {
   fi
 }
 
+# Show free RAM and used Swap
+prompt_ram() {
+  defined POWERLEVEL9K_RAM_ELEMENTS || POWERLEVEL9K_RAM_ELEMENTS=(ram_free swap_used)
+
+  local rendition base
+  for element in "${POWERLEVEL9K_RAM_ELEMENTS[@]}"; do
+    case $element in
+      ram_free)
+        if [[ "$OS" == "OSX" ]]; then
+          ramfree=$(vm_stat | grep "Pages free" | grep -o -E '[0-9]+')
+          # Convert pages into Bytes
+          ramfree=$(( ramfree * 4096 ))
+          base=''
+        else
+          ramfree=$(grep -o -E "MemFree:\s+[0-9]+" /proc/meminfo | grep -o "[0-9]*")
+          base=K
+        fi
+
+        rendition+="$(print_icon 'RAM_ICON') $(printSizeHumanReadable "$ramfree" $base) "
+      ;;
+      swap_used)
+        if [[ "$OS" == "OSX" ]]; then
+          raw_swap_used=$(sysctl vm.swapusage | grep -o "used\s*=\s*[0-9,.A-Z]*" | grep -o "[0-9,.A-Z]*$")
+          typeset -F 2 swap_used
+          swap_used=${$(echo $raw_swap_used | grep -o "[0-9,.]*")//,/.}
+          # Replace comma
+          swap_used=${swap_used//,/.}
+
+          base=$(echo "$raw_swap_used" | grep -o "[A-Z]*$")
+        else
+          swap_total=$(grep -o -E "SwapTotal:\s+[0-9]+" /proc/meminfo | grep -o "[0-9]*")
+          swap_free=$(grep -o -E "SwapFree:\s+[0-9]+" /proc/meminfo | grep -o "[0-9]*")
+          swap_used=$(( swap_total - swap_free ))
+          base=K
+        fi
+
+        rendition+="$(printSizeHumanReadable "$swap_used" $base) "
+      ;;
+    esac
+  done
+
+  "$1_prompt_segment" "$0" "yellow" "$DEFAULT_COLOR" "${rendition% }"
+}
+
 # Node version from NVM
 # Only prints the segment if different than the default value
 prompt_nvm() {