This avoid leaking pipe fd in children and simplifies the code
MFC After: 1 week
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D56120
(cherry picked from commit 945e60e018c287f8097f3ee4a30ccf4921845aa1)
Use exit status 2 for errors, 1 only to indicate that differences were
found between the inputs (in some operating modes).
MFC after: 1 week
Sponsored by: Klara, Inc.
Reviewed by: ngie, bapt
Differential Revision: https://reviews.freebsd.org/D55608
(cherry picked from commit fe5341287c6c9bacc18879b25ed72ceb42e1c811)
* Order includes.
* Turn the diff type into an enum.
* Turn an unreachable error message into an assertion.
* Remove unused debugging code.
* Remove some dead assignments.
* Consistently use 1 instead of EXIT_FAILURE.
* Turn a return from main() into an exit().
MFC after: 1 week
Sponsored by: Klara, Inc.
Reviewed by: bapt
Differential Revision: https://reviews.freebsd.org/D55517
(cherry picked from commit c2dee7786bf32cb66cedec226e42e79e06457c51)
Make the merge mode compatible with GNU diff3
Add tests for all the changes, those tests are extracted from the
etcupdate testsuite.
This version passes the etcupdate testsuite and the diffutils diff3
test suite.
MFC After: 1 week
(cherry picked from commit 2cfca8e710f260b8a1bb1ee5e1836a52e468ef4b)
for cases where file2 differs but file1 and file3 agrees, the code
stored the file2 and file3 line numbers in the de[] editing script
entries but used them as if they were file1 line numbers.
Reviewed by: thj
Differential Revision: https://reviews.freebsd.org/D55276
(cherry picked from commit 8d442cf32e4fb29fbb85090ac29d32d1e30fd824)
This is mostly thj@'s work, with some tweaks and cleanup by me. There
are still some cases where our output differs from GNU diff3, but it's
much better than before and I'd rather commit what I have now than let
it continue to languish in a metaphorical drawer.
MFC after 3 weeks
Sponsored by: Klara, Inc.
Reviewed by: thj
Differential Revision: https://reviews.freebsd.org/D46762
Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.
Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/
Sponsored by: Netflix
Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.
Sponsored by: Netflix
In gnu diff3 3 way merging files where the new file and the target are
already the same will die and show what has failed to be merged except
if -E is passed in argument, in this case it will finish the merge.
This difference in behaviour was breaking one of the etcupdate testcase
with bsd diff3
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D41730
diff3 in -m mode generates a complete file with changes bracketed with
conflict markers. This adds support for diff3 to generate version
control style three way merge output.
The output format was inferred from looking at the gnu diff3 output on a
selection of test files as a specification of what diff3 -m should
output is not available. It is likely there are cases where the -m
output differs from other tools and I am happy to update diff3 to
address these.
Discussed with: pstef, kevans
Sponsored by: Klara, Inc.
Diff3 in -A mode generates an ed script to show how the 3 files and
brackets changes that conflict. The ed script generated should when
applied leave familiar merge conflict markers in a patched file.
Diff3 output is not documented, this feature has been arrived at by
comparing bsd diff3 output to gnu diff3 output until they were made to
agree. There are likely to still be differences between these formats.
The gnu diff3 guide is actually quite good at explaining how diff3
output should appear, but it doesn't cover every form of output from
diff3.
https://www.gnu.org/software/diffutils/manual/diffutils.html#Comparing-Three-Files
Discussed with: pstef, kevans
Sponsored by: Klara, Inc.
Replace the edscript code that tracked and printed lines using byte
offsets with code that can work from line offsets.
This tidies up the reduces duplication in the edscript output code. It
also fixes the usage of the de struct so that it only tracks diffs as
line offsets rather than the usage changing from line offsets to byte
offsets during the lifetime of diff3.
Large files with large numbers of ranges will probably suffer in
performance here, but as we don't use diff3 yet this isn't a regression.
Include a warning for future hackers so they have a place to start
hacking from.
Reviewed by: pstef
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D34941
diff3 with the -e (ed script flag) can generate line deletions, add
support for deletions and add a test case to exercise this behaviour.
This functionality was unearthed through comparison of bsd diff3 and gnu
diff3 output.
Reviewed by: pstef
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D34912
import bsd diff3 from OpenBSD.
Differences with OpenBSD:
- lots of warning fixed
- no shell wrapper with diff3 actually living in libexec
- capsicumized
Keep it disconnected as it is not yet good enough to replace GNU diff
The motivation to import it now it to allow other people to jump in and also to
have an open development on it
Obtained from: OpenBSD
