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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2008, 2012 Peter Miller
* Written by Peter Miller <pmiller@opensource.org.au>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This is part of the project "aegis.conf" file. It controls many
* aspects of how Aegis interacts with your project.
*/
/*
* Compare two files using GNU diff. The -U -1 option produces an output
* with inserts and deletes shown line, with the whole file as context.
* This is usually superior to -c, as it shows what happened
* more clearly (and it takes less space). The -b option could be added
* to compare runs of white space as equal.
*
* This command is used by aed(1) to produce a difference listing when
* file in the development directory was originally copied from the
* current version in the baseline.
*
* All of the command substitutions described in aesub(5) are available.
* In addition, the following substitutions are also available:
*
* ${ORiginal}
* The absolute path name of a file containing the version
* originally copied. Usually in the baseline.
* ${Input}
* The absolute path name of the edited version of the file.
* Usually in the development directory.
* ${Output}
* The absolute path name of the file in which to write the
* difference listing. Usually in the development directory.
*
* An exit status of 0 means successful, even of the files differ (and
* they usually do). An exit status which is non-zero means something
* is wrong. (So we need to massage the exit status, because diff does
* things a little differently.)
*
* The non-zero exit status may be used to overload this command with
* extra tests, such as line length limits. The difference files must
* be produced in addition to these extra tests.
*/
diff_command =
"set +e; "
"diff -U -1 -a ${quote $original} ${quote $input} > ${quote $output}; "
"test $? -le 1"
;
/* vim: set ts=8 sw=4 et : */
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