#!/usr/bin/awk -f

BEGIN {
# Change these to the parent and child paths in the repo
	parentpath = "//depot/vendor/freebsd/"
	childpath = "//depot/user/rwatson/tcp/"
}
$1 == "===="    {
        last_line = $0
        last_filename = $2
        gsub(parentpath, "", last_filename)
        gsub(/#[0-9]*$/, "", last_filename)
        did_sub = 0
}
$1 == "===="  && $2 == "<none>" {
        new_file = $4
        gsub(childpath, "", new_file)
        gsub(/#[0-9]*$/, "", new_file)
        old_sep=OFS
        OFS=""
        print "#!/bin/sh" > "/tmp/awkdiff_make_diff"
        print "p4 print ", $4, " | sed '/^\\/\\/depot/d' > /tmp/awkdiff_foo" >> "/tmp/awkdiff_make_diff"
        print "diff -u /dev/null /tmp/awkdiff_foo | sed s@/tmp/awkdiff_foo@", new_file, "@" >> "/tmp/awkdiff_make_diff"
        close("/tmp/awkdiff_make_diff")
        OFS=old_seP
        system("sh /tmp/awkdiff_make_diff")
#       print $0
}
$1 == "===="  && $2 == "<" && $3 == "none" && $4 == ">" {
        new_file = $6
        gsub(childpath, "", new_file)
        gsub(/#[0-9]*$/, "", new_file)
        old_sep=OFS
        OFS=""
        print "#!/bin/sh" > "/tmp/awkdiff_make_diff"
        print "p4 print ", $6, " | sed '/^\\/\\/depot/d' > /tmp/awkdiff_foo" >> "/tmp/awkdiff_make_diff"
        print "diff -u /dev/null /tmp/awkdiff_foo | sed s@/tmp/awkdiff_foo@", new_file, "@" >> "/tmp/awkdiff_make_diff"
        close("/tmp/awkdiff_make_diff")
        OFS=old_seP
        system("sh /tmp/awkdiff_make_diff")
#       print $0
}
$1 == "===="  && $4 == "<none>" {
        del_file = $2
        gsub(parentpath, "", del_file)
        gsub(/#[0-9]*$/, "", del_file)
        old_sep=OFS
        OFS=""
        print "#!/bin/sh" > "/tmp/awkdiff_make_diff"
        print "p4 print ", $2, " | sed '/^\\/\\/depot/d' > /tmp/awkdiff_foo" >> "/tmp/awkdiff_make_diff"
        print "diff -u /tmp/awkdiff_foo /dev/null | sed s@/tmp/awkdiff_foo@", del_file, "@" >> "/tmp/awkdiff_make_diff"
        close("/tmp/awkdiff_make_diff")
        OFS=old_seP
        system("sh /tmp/awkdiff_make_diff")
#       print $0
}
$1 == "===="  && $4 == "<" && $5 == "none" && $6 == ">" {
        del_file = $2
        gsub(parentpath, "", del_file)
        gsub(/#[0-9]*$/, "", del_file)
        old_sep=OFS
        OFS=""
        print "#!/bin/sh" > "/tmp/awkdiff_make_diff"
        print "p4 print ", $2, " | sed '/^\\/\\/depot/d' > /tmp/awkdiff_foo" >> "/tmp/awkdiff_make_diff"
        print "diff -u /tmp/awkdiff_foo /dev/null | sed s@/tmp/awkdiff_foo@", del_file, "@" >> "/tmp/awkdiff_make_diff"
        close("/tmp/awkdiff_make_diff")
        OFS=old_seP
        system("sh /tmp/awkdiff_make_diff")
#       print $0
}
$1 != "===="    {
        if (!did_sub && (($1 == "***************") || ($1 == "@@"))) {
                print "--- ", last_filename ".orig"
                print "+++ ", last_filename
                print $0
                did_sub = 1
        } else {
                print $0
        }
}
END {
	system("rm /tmp/awkdiff_foo")
	system("rm /tmp/awkdiff_make_diff")
}