imsg_add() frees its msg argument on error; avoid double-free in error paths

batch up tree entries in imsg instead of sending one imsg per tree entry This speeds up loading of trees significantly. ok op@

parse tree entries into an array instead of a pathlist Avoids some extra malloc/free in a performance-critical path. ok op@

prevent an out-of-bounds access in got_privsep_recv_tree()

plug memory leak in an error path of got_privsep_recv_tree()

make got_privsep_recv_tree() reject trees with less than zero entries

rework logic in got_privsep_recv_tree() to avoid an ugly 'goto' no functional change

refactor got_patch / got_worktree_patch_complete let got_patch own fileindex_path and call got_worktree_patch_complete only if got_wokrtree_patch_prepare hasn't failed. suggested by stsp@

got patch: avoid open/sync/close the fileindex over and over again Instead of flushing the fileindex after every patch in the patchfile just reuse the same fileindex and sync it only at the end of the patch operation. This speeds up 'got patch' on large repositories by quite a lot.

got patch: switch from fseek() to fseeko(), use unary minus while here ok op

got patch: fail when reading empty hunks

bump version number

CHANGES for 0.70

map delta cache file into memory if possible while writing a pack file with a fix from + ok op@

fix load_object_ids() such that packing tags works if zero commits are packed reported by jrick and op

hook cmdline send tests up for 'make regress', this was forgotten

run the search for deltas to reuse in got-read-pack This significantly speeds up the deltification step of packing by avoiding imsg traffic. gotadmin no longer requests individual raw deltas from got-read-pack to check whether it can reuse them. Instead, got-read-pack obtains a list of objects we want to pack, and hands back the list of all deltas in its pack file which can be reused. Messages are now batched such that imsg buffers are filled as much as possible. Another advantage is that deltas we are not going to reuse will no longer be written to the delta cache file, saving disk space. Before this patch, any raw delta candidate was written to the delta cache file by got-read-pack, and the decision whether to reuse the delta happened afterwards in the gotadmin process. Code for reading individual raw deltas is now unused and could be removed at some point. ok op@

avoid 'remove unused' loop by storing excluded objects in a separate set ok op@

avoid loop over the ID set which removes objects IDs with reused deltas ok op@

store deltas in compressed form while packing, both in memory and cache file This reduces memory and disk space consumption during packing. with tweaks + memleak on error fix from op@ ok op@

s/empty/done forgot in previous commit

got-read-patch: rename `ok' variable and simplify the parsing a bit

trailing whitespaces

got patch: handle git-style rename diffs extend the support for git-style diffs to include the "pure rename" case, i.e. when a file is renamed without any edits. ok stsp@

avoid subtraction of values larger than int in qsort(3) comparison callbacks tweak + ok tb@