fix a bug where 'got revert -R' failed on added subtrees The command could fail with "got: no such entry found in tree". This problem is reproduced by the regression test added in this commit. This happened because file index entries were processed in the wrong order by diff_fileindex_dir(). To fix this, keep removed entries in the RB tree and skip them when the file index is written out, rather than removing entries from the RB tree immediately causing side-effects for RB_NEXT and friends.

Sleep for one nanosecond after syncing the file index to disk Ensures that files modified after got exits have a different timestamp from the one which was recorded in the file index. Previously, 'got status' did not always detect such files as modified. Problem reported by Steven McDonald.

add -E option to 'got checkout' allowing use of a non-empty work tree path needed by and ok kn@

add copyright year for files already touched in 2020

prevent rebase with an out-of-date work tree

make 'got checkout' and 'got update' work with read-only repositories but warn users about the garbage collection problem

always unlink merged temporary files if an error occurs

use fchmod() instead of chmod() to tweak permissions of a merged temp file

add missing error checks to an openat() call

fix wrong function names in errno error messages

close races with concurrent filesystem modification when reading ignore files

add -k option to 'got remove' to keep files on disk ok stsp

fix leak in an error path of get_file_status()

fix fstatat() and openat() error checking in get_file_status()

avoid opening the file in get_file_status() if possible