#!/bin/bash

#

# Utility script to merge an xml snippet from one file into a document.

#

# To insert the file foo.inc into bar.xml,

# after the first line containing the marker  enter

#

# xml_insert.sh bar.xml foo foo.inc

#

# 2005 © Øyvind Kolås

#

# FIXME: add argument checking / error handling

: ${AWK="awk"}

: ${ECHO="echo"}

: ${MKDIR="mkdir"}

: ${SED="sed"}

: ${Xsed="$SED -e 1s/^X//"}

# Global variables:

EXIT_SUCCESS=0

EXIT_FAILURE=1

dirname="s,/[[^/]]*$,,"

basename="s,^.*/,,"

# Work around backward compatibility issue on IRIX 6.5. On IRIX 6.4+, sh

# is ksh but when the shell is invoked as "sh" and the current value of

# the _XPG environment variable is not equal to 1 (one), the special

# positional parameter $0, within a function call, is the name of the

# function.

progpath="$0"

# The name of this program:

# In the unlikely event $progname began with a '-', it would play havoc with

# func_echo (imagine progname=-n), so we prepend ./ in that case:

progname=`$ECHO "X$progpath" | $Xsed -e "$basename" -e 's,^-,./-,'`

# func_error arg...

# Echo program name prefixed message to standard error.

func_error ()

{

    $ECHO "$progname: "${1+"$@"} 1>&2

}

# func_fatal_error arg...

# Echo program name prefixed message to standard error, and exit.

func_fatal_error ()

{

    func_error ${1+"$@"}

    exit $EXIT_FAILURE

}

# func_mktempdir [string]

# Make a temporary directory that won't clash with other running

# processes, and avoids race conditions if possible.  If

# given, STRING is the basename for that directory.

func_mktempdir ()

{

    my_template="${TMPDIR-/tmp}/${1-$progname}"

    if test "$opt_dry_run" = ":"; then

      # Return a directory name, but don't create it in dry-run mode

      my_tmpdir="${my_template}-$$"

    else

      # If mktemp works, use that first and foremost

      my_tmpdir=`mktemp -d "${my_template}-XXXXXXXX" 2>/dev/null`

      if test ! -d "$my_tmpdir"; then

        # Failing that, at least try and use $RANDOM to avoid a race

        my_tmpdir="${my_template}-${RANDOM-0}$$"

        save_mktempdir_umask=`umask`

        umask 0077

        $MKDIR "$my_tmpdir"

        umask $save_mktempdir_umask

      fi

      # If we're not in dry-run mode, bomb out on failure

      test -d "$my_tmpdir" || \

        func_fatal_error "cannot create temporary directory \`$my_tmpdir'"

    fi

    $ECHO "X$my_tmpdir" | $Xsed

}

tmp_dir="`func_mktempdir`"

tmp_file="$tmp_dir/one"

cp $1 $tmp_file

numlines=`wc -l $tmp_file | $AWK '{print $1;}'`

splitno=`$AWK "/<\!--$2-->/ { print NR; exit 0; }" $tmp_file`

tailno=`expr $numlines - $splitno`

head -$splitno $tmp_file > $1

cat $3 >> $1

tail -$tailno $tmp_file >> $1

rm -rf $tmp_dir

exit $?