Make output concise by default.

tools/resources/optimize-png-files.sh

 #!/bin/bash
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # The optimization code is based on pngslim (http://goo.gl/a0XHg)
 # and executes a similar pipleline to optimize the png file size.
 # The steps that require pngoptimizercl/pngrewrite/deflopt are omitted,
 # but this runs all other processes, including:
 # 1) various color-dependent optimizations using optipng.
@@ skipping 36 matching lines @@
 # Global variables for stats
 TOTAL_OLD_BYTES=0
 TOTAL_NEW_BYTES=0
 TOTAL_FILE=0
 CORRUPTED_FILE=0
 PROCESSED_FILE=0
 
 declare -a THROBBER_STR=('-' '\\' '|' '/')
 THROBBER_COUNT=0
 
-SUBPROCESS=0
+VERBOSE=0
 
-# NoOp in subprocess, echo otherwise.
+# Echo only if verbose option is set.
 function info {
-  if [ $SUBPROCESS -eq 0 ]; then
+  if [ $VERBOSE -eq 1 ]; then
     echo $@
   fi
 }
 
 # Show throbber character at current cursor position.
 function throbber {
   info -ne "${THROBBER_STR[$THROBBER_COUNT]}\b"
   let THROBBER_COUNT=($THROBBER_COUNT+1)%4
 }
 
@@ skipping 305 matching lines @@
       0  Just run pngcrush. It removes unnecessary chunks and perform basic
          optimization on the encoded data.
       1  Optimize png files using pngout/optipng and advdef. This can further
          reduce addtional 5~30%. This is the default level.
       2  Aggressively optimize the size of png files. This may produce
          addtional 1%~5% reduction.  Warning: this is *VERY*
          slow and can take hours to process all files.
   -r<revision> If this is specified, the script processes only png files
                changed since this revision. The <dir> options will be used
                to narrow down the files under specific directories.
-  -s  Run as subprocess. This may be used to parallelize execution.
-      Usage: find <dir> -name \"*.png\" | xargs -n1 -P16 $program -s -o2
+  -v  Shows optimization process for each file.
   -h  Print this help text."
   exit 1
 }
 
 if [ ! -e ../.gclient ]; then
   echo "$0 must be run in src directory"
   exit 1
 fi
 
 if [ "$(expr substr $(uname -s) 1 6)" == "CYGWIN" ]; then
   using_cygwin=true
 else
   using_cygwin=false
 fi
 
 OPTIMIZE_LEVEL=1
 # Parse options
-while getopts o:r:h:s opts
+while getopts o:r:h:v opts
 do
   case $opts in
     r)
       COMMIT=$(git svn find-rev r$OPTARG | tail -1) || exit
       if [ -z "$COMMIT" ] ; then
         echo "Revision $OPTARG not found"
         show_help
       fi
       ;;
     o)
       if [[ ! "$OPTARG" =~ [012] ]] ; then
         show_help
       fi
       OPTIMIZE_LEVEL=$OPTARG
       ;;
-    s)
-      let SUBPROCESS=1
+    v)
+      let VERBOSE=1
       ;;
     [h?])
       show_help;;
   esac
 done
 
 # Remove options from argument list.
 shift $(($OPTIND -1))
 
 # Make sure we have all necessary commands installed.
@@ skipping 38 matching lines @@
    if [ -f $f ] ; then
      optimize_file $f
    else
      echo "Skipping deleted file: $f";
    fi
  done
 else
   for d in $DIRS; do
     info "Optimizing png files in $d"
     optimize_dir $d
-    echo
+    info ""
   done
 fi
 
 # Print the results.
 if [ $PROCESSED_FILE == 0 ]; then
   echo "Did not find any files (out of $TOTAL_FILE files)" \
        "that could be optimized" \
        "in $(date -u -d @$SECONDS +%T)s"
 else
   let diff=$TOTAL_OLD_BYTES-$TOTAL_NEW_BYTES
   let percent=$diff*100/$TOTAL_OLD_BYTES
   echo "Processed $PROCESSED_FILE files (out of $TOTAL_FILE files)" \
        "in $(date -u -d @$SECONDS +%T)s"
   echo "Result : $TOTAL_OLD_BYTES => $TOTAL_NEW_BYTES bytes" \
        "($diff bytes : $percent %)"
 fi
 if [ $CORRUPTED_FILE != 0 ]; then
   echo "Warning: corrupted files found: $CORRUPTED_FILE"
   echo "Please contact the author of the CL that landed corrupted png files"
 fi