#!/bin/bash

# Author: Alexander Kriegisch (http://scrum-master.de)

usage()
{
cat << EOF

$SELF - Make wrapper for calling additional commands before/after build

Usage: $SELF [options] [--] [make-options] [<target>]
    -l <log-file> - write output to <log-file> (default: fmake.log)
    -t            - append time stamp to log file name
                    (e.g. fmake_2012-02-10_12-25-20.log)
    -n            - no log file
    -c            - log to console (default: no)
    -h            - display this help text
    -x            - display sample fmake_post code (e-mail message)
    --            - separate $SELF options from make options
    <target>      - make target(s) (optional)

Examples:
    $SELF
        call "make" (default target), log to fmake.log, no console output
    $SELF -l my.log -c precompiled
        call "make precompiled", log to my.log and to console in parallel
    $SELF -n -c
        no log file, console output only
    $SELF -n
        no log file, no console output (silent make)
    $SELF -t mc-dirclean mc-precompiled
        make two targets, log to fmake_<timestamp>.log
    $SELF -c -- FREETZ_FWMOD_SKIP_PACK=y -k firmware-nocompile
        log + console output, call make with environment variable + parameter

In all modes, the build will be timed (via "time") and the result printed
to the chosen output channels.

User-specified pre/post-make actions such as sending an e-mail notification
after a long build can be specified in files named fmake_pre and fmake_post.
The files are optional, but have to be executable if they exist. They may be
of any type, e.g. Bash/Perl/Python/Lua scripts or even compiled executables.
In fmake_post you may use the following environment variables:

    FMAKE_TARGET - make target(s)
    FMAKE_RESULT - make exit code (0=OK)
    FMAKE_TIME   - duration of build process
    FMAKE_LOG    - log file name, if any

EOF
}

fmake_post_sample()
{
cat << 'EOF'
#!/bin/bash

# Send e-mail with build info, using SendEmail lightweight Perl client
# Debian package name: sendemail
# See also http://caspian.dotconf.net/menu/Software/SendEmail

sendemail \
    -f "Freetz make <sender@mydomain.org>" \
    -t "John Doe <recipient@mydomain.org>" \
    -u "Freetz build finished (result: $FMAKE_RESULT)" \
    -s mail.mydomain.org \
    -xu smtp_user \
    -xp smtp_password \
    -o tls=yes \
    -m "make $FMAKE_TARGET\n    exit code $FMAKE_RESULT\n    duration $FMAKE_TIME" \
    -a "$FMAKE_LOG" \
>/dev/null
EOF
}

# Set constant file names
SELF="$(basename "$0")"
PRE="./fmake_pre"
POST="./fmake_post"

# Bash built-in "time" should return duration (real) only, not user/sys
TIMEFORMAT='%lR'

# Initialise command line parameters
FMAKE_LOG=fmake.log
TIMESTAMP=
DO_LOG=1
DO_CONS=0

# Parse parameters
while getopts l:tnchx opt; do
	case $opt in
		-) break ;;
		l) [ "$OPTARG" ] && FMAKE_LOG="$OPTARG" ;;
		t) TIMESTAMP=$(date '+%Y-%m-%d_%H-%M-%S') ;;
		n) DO_LOG=0 ;;
		c) DO_CONS=1 ;;
		h) usage; exit 0 ;;
		x) fmake_post_sample; exit 0 ;;
		*) usage >&2; exit 1 ;;
	esac
done
shift $((OPTIND-1))

# Remaining parameter(s) must be make target(s)
FMAKE_TARGET="$@"

[ $DO_LOG -eq 0 ] && FMAKE_LOG=
[ "$TIMESTAMP" -a "$FMAKE_LOG" == "fmake.log" ] && FMAKE_LOG="fmake_${TIMESTAMP}.log"

# Run pre-build script
[ -f "$PRE" -a -x "$PRE" ] && "$PRE"

# Run build, measuring execution time
{
	if [ $DO_LOG -eq 1 ]; then
		if [ $DO_CONS -eq 1 ]; then
			# Log file + console
			time make "$@" 2>&1 | tee "$FMAKE_LOG" 
		else
			# Log file only
			time make "$@" >"$FMAKE_LOG" 2>&1
		fi
	else
		if [ $DO_CONS -eq 1 ]; then
			# Console only
			time make "$@" 2>&1
		else
			# Silent make (no output)
			time make "$@" >/dev/null 2>&1
		fi
	fi
} 2>fmake.time;

FMAKE_RESULT=$?
FMAKE_TIME="$(cat fmake.time)"
rm -f fmake.time

# Print result to console
echo -e "make $FMAKE_TARGET\n    exit code $FMAKE_RESULT\n    duration $FMAKE_TIME"

# Run post-build script, providing enviromnment
export FMAKE_TARGET FMAKE_RESULT FMAKE_TIME FMAKE_LOG
[ -f "$POST" -a -x "$POST" ] && "$POST"

exit $FMAKE_RESULT