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Masterwork From Distant Lands
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Authored By
bapt
Aug 2 2016, 10:21 PM
2016-08-02 22:21:25 (UTC+0)
Size
2 KB
Referenced Files
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Masterwork From Distant Lands
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#!/bin/sh
#
# Copyright (c) 2016 Baptiste Daroussin
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
set
-e
rc
=
0
quiet
=
0
A_flag
=
0
E_flag
=
0
e_flag
=
0
labelcount
=
0
usage
()
{
echo
"
$0
: usage
$0
[-AEpq] [-L label [ -L label [-L label]]] file1 file2 file3"
>
&
2
}
clean_tmp
()
{
if
[
"
${
output
}
"
!
=
"/dev/stdout"
]
;
then
rm
-f
"
${
output
}
"
fi
}
while
getopts
'AEeL:pq'
opt
;
do
case
"
${
opt
}
"
in
A
)
A_flag
=
1
;;
E
)
E_flag
=
1
;;
L
)
labelcount
=
$((
labelcount
+
1
))
if
[
${
labelcount
}
-gt
3
]
;
then
echo
"
$0
: too many -L options"
>
&
2
echo
"
$0
aborted"
>
&
2
exit
2
fi
labels
=
"
${
labels
}
-L
${
OPTARG
}
"
;;
p
)
output
=
/dev/stdout
;;
q
)
quiet
=
1
;;
*
)
usage
exit
2
;;
esac
done
shift
$((
${
OPTIND
}
-
1
))
case
"
${
A_flag
}${
E_flag
}
"
in
11
)
echo
"
$0
: -A and -E are incompatible"
>
&
2
exit
2
;;
10
)
diff3_args
=
"-A"
;;
01
)
diff3_args
=
"-E"
;;
00
)
diff3_args
=
"-E"
;;
esac
if
[
$#
-ne
3
]
;
then
echo
"
$0
: not enough arguments"
>
&
2
usage
exit
2
fi
trap
clean_tmp
EXIT
if
[
-z
"
${
output
}
"
]
;
then
output
=
$(
mktemp
-t
merge
)
fi
diff3
${
diff3_args
}
-m
${
labels
}
"
$1
"
"
$2
"
"
$3
"
>
"
${
output
}
"
||
rc
=
$?
if
[
"
${
output
}
"
!
=
"/dev/stdout"
]
;
then
if
[
-w
"
$1
"
]
;
then
mv
-f
"
${
output
}
"
"
$1
"
else
echo
"
$0
:
$1
permission denied"
>
&
2
fi
fi
if
[
${
rc
}
-eq
1
]
;
then
if
[
${
quiet
}
-eq
0
]
;
then
echo
"
$0
: warning: conflict during merge"
>
&
2
fi
exit
1
fi
exit
0
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