Although git9 always uses the same commit date and author date, other
implementation do make a distinction. Since commit date is more
representative of the commit graph order, use this as a traversal hint
instead of author date.
If the server only supports the dumb protocol, the first 4 bytes of
response will be the initial part of the hash of the first ref.
The http-protocol documentation says that we should fall back to the
dumb protocol when we don't see a content-type of
application/x-$servicename-advertisement. Check this before
attempting to read a smart git packet.
We now keep track of 3 sets during traversal:
- keep: commits we've reached from head commits
- drop: commits we've reached from tail commits
- skip: ancestors of commits in both 'keep' and 'drop'
Commits in 'keep' and/or 'drop' may be added later to the 'skip' set
if we discover later that they are part of a common subgraph of the
head and tail commits.
From these sets we can calculate the commits we are interested in:
lca commits are those in 'keep' and 'drop', but not in 'skip'.
findtwixt commits are those in 'keep', but not in 'drop' or 'skip'.
The "LCA" commit returned is a common ancestor such that there are no
other common ancestors that can reach that commit. Although there can
be multiple commits that meet this criteria, where one is technically
lower on the commit-graph than the other, these cases only happen in
complex merge arrangements and any choice is likely a decent merge
base.
Repainting is now done in paint() directly. When we find a boundary
commit, we switch our paint color to 'skip'. 'skip' painting does
not stop when it hits another color; we continue until we are left
with only 'skip' commits on the queue.
This fixes several mishandled cases in the current algorithm:
1. If we hit the common subgraph from tail commits first (if the tail
commit was newer than the head commit), we ended up traversing the
entire commit graph. This is because we couldn't distinguish
between 'drop' commits that were part of the common subgraph, and
those that were still looking for it.
2. If we traversed through an initial part of the common subgraph from
head commits before reaching it from tail commits, these commits
were returned from findtwixt even though they were also reachable
from tail commits.
3. In the same case as 2, we might end up choosing an incorrect
commit as the LCA, which is an ancestor of the real LCA.
When loading an acme dump file that contains a window with only one
tag line, there are cases where acme hides that window (i.e. not even
its tag is visible).
The following commands reproduce the issue:
% ed <<EOE
1
i
/tmp
/lib/font/bit/pelm/unicode.8.font
/lib/font/bit/pelm/unicode.8.font
0
f 0 5 175 175 1
5 40 175 1 0 /sys/src/cmd/acme/ Del Snarf Get | Look
f 0 4 330 330 3
4 27 330 1 0 /tmp/ Del Snarf Get | Look
.
,w /tmp/test.dump
Q
EOE
% window -dx 900 -dy 600 'acme -l /tmp/test.dump'
This issue was introduced in commit 47b7dc5ccd.
This avoids ipconfig having to explicitely specify the tag
when we want to set route type, as the tag can be provided
implicitely thru the "tag" command.
the bug happens when we did the fast exit thru "done" label,
where we would not make sure that theres space in the buffer
for the NUL terminator.
instead, avoid the fast exit and always do the final
adjbuf() that makes sure we have space for the NUL terminator.
remove the pointless pb checks, they'r wrong (should'v
been bp >= buf+bufsz) and adjbuf() already makes sure this
can never happen.
EDID 1.3 section 5 gives a table describing the priority order of
timing information. Use this ordering when constructing the EDID
mode list.
Since aux/vga selects the first mode in the modelist that matches
the given size, it will now select the mode of that size with the
highest preference. Or, if you set vgasize=auto (or some other
string without an 'x'), aux/vga will select the Preferred Detailed
Timing.
This should make it unnecessary to modify vgadb in many cases.
when reverting files, 'cp -x' updates the mtime
to the time the file was committed. this prevents
'mk' from rebuilding the file, leading to stale
builds.
this change touches the file on revert, so that
we rebuild the file.
The altsetting was handled only for a single endpoint
(per interface number), but has to be handled for each
endpoint (per interface *AND* altsetting number).
A multi function device (like a disk) can have
multiple interfaces, all with the same interface number
but varying altsetting numbers and each of these
interfaces would list distict endpoint configurations.
Multiple interfaces can even share some endpoints (they
use the same endpoint addresses), but
we still have to duplicate them for each
interface+altsetting number (as they'r part of
actually distict interfaces with distict endpoint
configurations).
It is also important to *NOT* make endpoints bi-directional
(dir == Eboth) when only one direction is used in a
interface/altsetting and the other direction in another.
This was the case for nusb/disk with some seagate drive
where endpoints where shared between the UAS and
usb storage class interface (but with distict altsettings).
The duplicate endpoints (as in using the same endpoint address)
are chained together by a next pointer and the head
is stored in Usbdev.ep[addr], where addr is the endpoint
address. These Ep structures will have distinct endpoint
numbers Ep.id (when they have conflicting types), but all
will share the endpoint address (lower 4 bits of the
endpoint number).
The consequence is that all of the endpoints configuration
(attributes, interval) is now stored in the Ep struct and
no more Altc struct is present.
A pointer to the Ep struct has to be passed to openep()
for it to configure the endpoint.
For the Iface struct, we will now create multiple of them:
one for each interface *AND* altsetting nunber,
chained together on a next pointer and the head being
stored in conf->iface[ifaceid].
--
cinap
Pattern matching with lists no longer works:
; ls /tmp/*.c
/tmp/npage.c
/tmp/pagedebug.c
/tmp/pageold.c
/tmp/scheduler.c
/tmp/writeimagetest.c
; ls /tmp/^(*.c)
ls: /tmp/*.c: '/tmp/*.c' directory entry not found
; 9fs dump
; bind /n/dump/2021/1002/amd64/bin/rc /bin/rc
; rc
; ls /tmp/^(*.c)
/tmp/npage.c
/tmp/pagedebug.c
/tmp/pageold.c
/tmp/scheduler.c
/tmp/writeimagetest.c
the fix:
we have to propagate the glob attribute thru lists
as well. before it was only handled for single words
and propagated thru concatenations...
the Xglob instruction now works on list, and we
propagate the glob attribute thru PAREN and WORDS
and ARGLIST nodes.
also, avoid using negative numbers for the Tree.glob
field as char might be unsigned on some targets.
