format-source

#!/bin/sh
# format-source --- format (C) source code according to coding style
#
# Usage: format-source [-v] [-n] [FILE|DIRECTORY]...
#
# Note: The indent options assume GNU indent v2.2.10, so if you have
#	an older indent the options may not match what is expected.
#
# Any marked block comment blocks have to be moved to align manually after
# the reformatting has been completed as marking a block causes indent to 
# not move it at all ...
#

PATH=/usr/local/bin:/bin:/usr/bin:$PATH
export PATH
HERE="`dirname $0`"

set -e

if [ $# -eq 0 ]; then
    echo "usage: $0 [-v] [-n] [-c] [sourcefile|sourcedir] ..." >&2
    exit 1
fi

VERBOSE=false
DONT=false
STOPARGS=false
CHANGED=false
DEBUG=""

# For this exercise, we want to force the style, so we roll our own
# indent profile, which is at a well known location.
INDENT_PROFILE="$HERE/indent.pro"
export INDENT_PROFILE
if [ ! -f "$INDENT_PROFILE" ]; then
    echo "$0: unable to locate the indent.pro file" >&2
    exit 1
fi

# Extra arguments; for adding the comment-formatting
INDENT_ARGS=""
for i; do
    if [ "$STOPARGS" != "true" ]; then
	case $i in
	    --) STOPARGS="true"; continue;;
	    -n) DONT="true"; continue;;
	    -v) VERBOSE="true"; 
		echo "INDENT_PROFILE=$INDENT_PROFILE";
		continue;;
	    -c) COMMENTS="true"; 
      		INDENT_ARGS="-fc1 -fca -cdb -sc"; 
		continue;;
	    -nc) COMMENTS="true";
		 continue;;
	    -d) DEBUG='eval tee "$j.pre" |'
		continue;;
	esac
    fi

    if [ -d "$i" ]; then
	LIST=`find "$i" -name '*.[ch]' -print`
    else 
	if [ ! -f "$i" ]; then
	    echo "$0: source file not found: $i" >&2
	    exit 1
	fi
	LIST="$i"
    fi
    
    for j in $LIST; do
	# Ignore symlinks - we only ever process the base file - so if we
	# expand a directory tree we need to ignore any located symlinks.
	if [ -d "$i" ]; then
	    if [ -h "$j" ]; then
		continue;
	    fi
	fi

	if [ "$DONT" = "false" ]; then
	    tmp=$(mktemp /tmp/indent.XXXXXX)
	    trap 'rm -f "$tmp"' HUP INT TERM EXIT

	    case `basename $j` in 
		*)
		    cat "$j" | indent $INDENT_ARGS > "$tmp"
		    if cmp -s "$tmp" "$j"; then
			if [ "$VERBOSE" = "true" ]; then
			    echo "$j unchanged"
			fi
			rm "$tmp"
		    else
			if [ "$VERBOSE" = "true" ]; then
			    echo "$j changed"
			fi
			CHANGED=true
			mv "$tmp" "$j"
		    fi
		    ;;
	    esac
	fi
    done
done


if [ "$VERBOSE" = "true" ]; then
    echo
    if [ "$CHANGED" = "true" ]; then
	echo "SOURCE WAS MODIFIED"
    else
	echo "SOURCE WAS NOT MODIFIED"
    fi
fi