#!/bin/bash

# This script runs after the %install scriptlet of the Desktop spec files,

# The purpose of the script is post-processing files before packaging.

# 

# Currently it does two things:

#

# 1) delete CDDL header from text files, if found

# 2) validate smf manifests

#

# command line arguments:

#

# spec-post-install [DIR|FILE]...

#

# Processes a single file or all files in a directory, recursively

#

# returns 0 on success or 1 on failure (breaks the build)

#

# requires file/gnu-coreutils

SED=/usr/xpg4/bin/sed

TR=/usr/xpg4/bin/tr

NL=/usr/xpg4/bin/nl

STAT=/usr/bin/stat

# deletes the CDDL header from a text file

# returns 0 on success, 1 on error

delete_cddl() {

    mode=$(${STAT} -c '%a' "$1")

    chmod +w "$1"

    tmpfile=$(mktemp)

    ${SED} -e '/CDDL HEADER START/,/CDDL HEADER END/d' < "$1" > $tmpfile \

	|| return 1

    mv $tmpfile "$1" || return 1

    chmod $mode "$1"

    return 0

}

# return 0 is arg is an integer number

is_int() {

    echo "$1" | grep '^[1-9][0-9]*$' > /dev/null

}

# verifies if a given file needs the CDDL header removed

has_cddl() {

    start_line=$(${NL} -ba "$1" | ${TR} -cd 'a-z0-9A-Z 	\n' | \

	grep '^ *[0-9]*[ 	]*CDDL HEADER START *$' | awk '{print $1}')

    end_line=$(${NL} -ba "$1" | ${TR} -cd 'a-z0-9A-Z 	\n' | \

	grep '^ *[0-9]*[ 	]*CDDL HEADER END *$' | awk '{print $1}')

    is_int "$start_line" || return 1

    is_int "$end_line" || return 1

    if [ $start_line -gt $end_line ]; then

	return 1

    fi

    if [ $start_line -gt 15 ]; then

	echo "WARNING: CDDL-like header starts after the 15th line"

	return 1

    fi

    diff=$(($end_line - $start_line))

    if [ $diff != 17 -a $diff != 18 -a $diff != 11 -a $diff != 12 ]; then

	echo "WARNING: $1: unrecognised CDDL-like header, $diff lines long"

	return 1

    fi

}

# runs svccfg validate on arg

validate_manifest() {

    svccfg validate "$1" || return 1

    return 0

}

# processes a single file

process_file() {

    grep 'CDDL HEADER' "$1" > /dev/null && has_cddl "$1" && {

	echo "Deleting CDDL header from $1"

	delete_cddl "$1" || return 1

    }

    echo "$1" | egrep '/(var|lib)/svc/manifest/' > /dev/null && {

	echo "Validating SMF manifest $1"

	validate_manifest "$1" || return 1

    }

    return 0

}

# processes all files in a directory, recursively

process_dir() {

    files=$(find "$1" -type f -print)

    for file in $files; do

	process_file "$file" || return 1

    done

    return 0

}

for arg in "${@}"; do

    echo "Post-processing $arg"

    if [ -d "$arg" ]; then

	process_dir "$arg"

    elif [ -f "$arg" ]; then

	process_file "$arg"

    else

	echo "$0: $arg not found" 1>&2

	exit 1

    fi

done