regress: replace "sed -i" with ed(1) for portable in-place editing "sed -i" is fundamentally unportable. GNU and OpenBSD sed(1) treat the extension for the backup file as an optional argument and use "sed -i" for no backup file. FreeBSD sed(1) treats the extension as an obligatory argument and uses "sed -i ''" for no backup file. There is no single syntax that works for both. ok stsp op

regress: replace unportable ln -h option with rm && ln ok stsp

always show commit or tree IDs in diff header, in order to help 'got patch' The idea is that got patch can simply look for a line such as: commit - abcde1234567... to find the merge base commit ID to show in diff3 conflict markers. got log -p now displays commit IDs in its diff header, instead ofl tree or blob IDs. ok op@

got stage: implicitly unstage when staging the reverse of the staged diff otherwise we end up with a staged empty edit for that file. ok stsp@

don't pass $ret to test_done on failure when it's known to be zero Otherwise the test directory it's not left in place; ok tracey@

use test(1) -eq and -ne to compare integers, and reduce quoting This brings the rest of the regression test scripts in line with patch.sh.

'got stage' tests rely on unreferenced loose objects; disable GOT_TEST_PACK=1

make 'got update' display the worktree's branch name upon success ok tracey

use POSIX [s1 = s2] syntax instead of [s1 == s2]; patch by Ryo ONODERA

merge new diff implementation from the git.gameoftrees.org diff.git repository This new diff implementation was started by Neels Hofmeyr during the u2k20 hackathon and now replaces diffreg.c code lifted from the OpenBSD base system. The integration of this code into Got was done by me. Got now uses the patience diff algorithm by default. The diff.git repository will remain the primary repository for the diff code, which already compiles and runs on other operating systems such as Linux. Any fixes and improvements for files inherited from the diff.git repository should be written against that repository and synced to got.git afterwards.

switch function declarations from Korn shell to Bourne/POSIX shell syntax ok stsp

add a -q option to tests for quiet output and use it for 'make regress' Previous default output remains when test cases are run individually. ok tracey

stop reinstalling symlinks after commit; 'got update' can handle that

forbid bad symlinks; add -S option to 'got commit' and 'got stage' to allow them

make 'got stage -p' work with symlinks