Instead of aborting hard with a server-side exception, report an error
to the client with "ERR %s" in a context where the client is expecting
ACK/NAK. Older clients will report this text to the user, but newer
ones know how to format this message in a more user-friendly way.
Change-Id: I1879b38988ba66f648c069c10dbfa14c3f34adb2
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
If the remote peer replies with "ERR %s" instead of "ACK %s common" or
"NAK" during ancestor negotiation in the fetch-pack/upload-pack
protocol, treat that as an exception that aborts processing with the
error text as supplied by the remote system.
This matches behavior with "ERR %s" during the advertisements, which
is also a way for the remote to abort processing.
Change-Id: I2fe818e75c7f46156744ef4f703c40173cbc76d0
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Most "ACK %s continue", "ACK %s common", "NAK" strings that are read
by the readACK() method and readString() are shorter than the
lineBuffer already available. Reuse that buffer when reading from
the network stream and converting to a string with RawParseUtils to
avoid unnecessary temporary byte array allocations.
Change-Id: Ibc778d9f7721943a065041d80fc427ea50d90fff
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
An option to insert a change id into the commit message was added
to CommitCommand.
This change is a prerequisite for removing GitIndex from EGit.
Change-Id: Iff9e26a8aaf21d8224bfd6ce3c98821c077bcd82
Signed-off-by: Jens Baumgart <jens.baumgart@sap.com>
Signed-off-by: Philipp Thun <philipp.thun@sap.com>
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>
This enables applications to differentiate between explicitly set
configuration parameters and best effort attempts to guess these
parameters from the operating system.
Change-Id: I67cc4099238a40c6dca795e64f0155ced6008ef1
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
If no directory is set before executing an InitCommand, the current
directory (".") is used by default. By calling File.getParentFile() we
get the actual directory this points to. Using this directory makes it
easier to read paths.
Change-Id: I6245941395dae920e4f90b8985be6ef3cce570d3
Signed-off-by: Philipp Thun <philipp.thun@sap.com>
This allows callers to determine if a URI is supported, before
worrying about the local repository.
Suggested-by: Dariusz Luksza <dariusz@luksza.org>
Change-Id: Ifc76a4ba841f2e2e7354bd51306b87b3b9d7f6ab
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>
The simplified form of add(String) makes it easier for applications
to pass down user input and allow PushCommand to convert it to the
internal RefSpec object.
Change-Id: Ibd2e95852db0e52ea4a36032942c4c42a7fb4261
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
The --all flag on the command line implies using refs/heads/* as
a push specification. Add this to the standard command object.
The --tags flag on the command line implies using refs/tags/* as
a push specification. Add this to the standard command object.
Change-Id: Iaef200b17cce77604548dbfb15cf2499b10687b5
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
For compatibility reasons with regards to native git and also to
make the init command easier to use from the command line,
argument --git-dir should not be required.
Additionally the path created in case --git-dir is not supplied now is
canonical and thus easier to read.
Change-Id: Idb7d77e983a78c4b21fbf232fc1e75ef581e5ed1
Signed-off-by: Philipp Thun <philipp.thun@sap.com>
If the client is only following the remote repository and has not
created any new non-common commits, the client will wind up sending
a "have %s" line for each tag in the repository. For some projects
like git.git, this is 339 tags and growing, resulting in more than
16 KiB needing to be POSTed over 12 HTTP requests.
Teach UploadPack (server side) to always execute the okToGiveUp()
logic at least once per negotiation round to determine if the server
can compute a pack right now. If it can, shove in an "ACK %s ready"
message to tell the client this and try to prevent receiving ancient
tags in future negotiation rounds.
Teach BasePackFetchConnection (client side) to honor a "ACK %s ready"
from the remote and break out of its SEND_HAVE loop once the remote
knows it can create a pack. This avoids sending the remaining 307
tags of git.git.
These two changes together reduce the number of HTTP RPCs from 13
down to 3 in order to fetch from git.git over smart HTTP. If either
side is missing the change, the older behavior (and its 13 RPCs)
is used.
Change-Id: I64736318fd0abf9ee5e56bd0b737707adb580b37
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This permits an application to create its own copy of FS.DETECTED
before manually setting the userHome or gitPrefix.
Bug: 337101
Change-Id: Ieea33c8d0ebdc801a4656b829d2a4b398559fd45
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This permits callers to modify the meaning of userHome, which
may be useful if their application allows the user to select
different user settings locations.
Bug: 337101
Change-Id: I076815edeec1c20dea028f7840be3930337dff77
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This permits callers to modify the meaning of gitPrefix, which
may be useful if their application allows the user to select
the location where C Git is installed.
Bug: 337101
Change-Id: I07362a5772da4955e01406bdeb8eaf87416be1d6
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This allows callers to perform the logic that constructed the
current FS.DETECTED value.
Change-Id: Id8517d131dcc3f675c60b2d935730872695ed1b0
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
C Git always fetches tags during clone, even if the tag doesn't
point to an object that was fetched by the branch specifications.
Match that behavior, as users expect it.
Bug: 326611
Change-Id: I81a82b7359a9649f18a172219da44ed54e77ca2f
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
If no RefSpec was specified, push the branch that is currently
checked out as HEAD.
Change-Id: I6f13ef6346188698a14e000fc590850afbc34b21
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Rather than copying the entire list, just replace each element
with the version that has setForceUpdate(true) invoked on it.
Change-Id: I2eaa4466d497cb2408ce61dc62ca26e0c32fe841
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This better matches with PackFile and CachedPack's methods
that return the same value.
Change-Id: Idb9b7c71d2048dd2344a62c2cde20b4e34529ab7
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
PackWriter incorrectly returned 0 from getObjectsNumber() when the
pack has not been written yet. This caused dumb transports like
amazon-s3:// and sftp:// to abort early and never write out a pack,
under the assumption that the pack had no objects.
Until the pack header is written to the output stream, compute the
current object count each time it is requested. Once the header is
started, use the object count from the stats object.
Change-Id: I041a2368ae0cfe6f649ec28658d41a6355933900
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
OwnerMap is about 200 ms faster than SubclassMap, more friendly to the
GC, and uses less storage: testing the "Counting objects" part of
PackWriter on 1886362 objects:
ObjectIdSubclassMap:
load factor 50%
table: 4194304 (wasted 2307942)
ms spent 36998 36009 34795 34703 34941 35070 34284 34511 34638 34256
ms avg 34800 (last 9 runs)
ObjectIdOwnerMap:
load factor 100%
table: 2097152 (wasted 210790)
directory: 1024
ms spent 36842 35112 34922 34703 34580 34782 34165 34662 34314 34140
ms avg 34597 (last 9 runs)
The major difference with OwnerMap is entries must extend from
ObjectIdOwnerMap.Entry, where the OwnerMap has injected its own
private "next" field into each object. This allows the OwnerMap to use
a singly linked list for chaining collisions within a bucket. By
putting collisions in a linked list, we gain the entire table back for
the SHA-1 bits to index their own "private" slot.
Unfortunately this means that each object can appear in at most ONE
OwnerMap, as there is only one "next" field within the object instance
to thread into the map. For types that are very object map heavy like
RevWalk (entity RevObject) and PackWriter (entity ObjectToPack) this
is sufficient, these entity types are only put into one map by their
container. By introducing a new map type, we don't break existing
applications that might be trying to use ObjectIdSubclassMap to track
RevCommits they obtained from a RevWalk.
The OwnerMap uses less memory. Each object uses 1 reference more (so
we're up 1,886,362 references), but the table is 1/2 the size (2^20
rather than 2^21). The table itself wastes only 210,790 slots, rather
than 2,307,942. So OwnerMap is wasting 200k fewer references.
OwnerMap is more friendly to the GC, because it hardly ever generates
garbage. As the map reaches its 100% load factor target, it doubles in
size by allocating additional segment arrays of 2048 entries. (So the
first grow allocates 1 segment, second 2 segments, third 4 segments,
etc.) These segments are hooked into the pre-allocated directory of
1024 spaces. This permits the map to grow to 2 million objects before
the directory itself has to grow. By using segments of 2048 entries,
we are asking the GC to acquire 8,204 bytes in a 32 bit JVM. This is
easier to satisfy then 2,307,942 bytes (for the 512k table that is
just an intermediate step in the SubclassMap). By reusing the
previously allocated segments (they are re-hashed in-place) we don't
release any memory during a table grow.
When the directory grows, it does so by discarding the old one and
using one that is 4x larger (so the directory goes to 4096 entries on
its first grow). A directory of size 4096 can handle up to 8 millon
objects. The second directory grow (16384) goes to 33 million objects.
At that point we're starting to really push the limits of the JVM
heap, but at least its many small arrays. Previously SubclassMap would
need a table of 67108864 entries to handle that object count, which
needs a single contiguous allocation of 256 MiB. That's hard to come
by in a 32 bit JVM. Instead OwnerMap uses 8192 arrays of about 8 KiB
each. This is much easier to fit into a fragmented heap.
Change-Id: Ia4acf5cfbf7e9b71bc7faa0db9060f6a969c0c50
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Use the Java 6 like services approach to find all supported
TransportProtocols within the CLASSPATH and load them all for use.
This allows users to inject additional protocol implementations simply
by putting their JARs on the application CLASSPATH, provided the
protocol author has written the proper services file.
Change-Id: I7a82d8846e4c4ed012c769f03d4bb2461f1bd148
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
The new TransportProtocol type describes what a particular Transport
implementation wants in order to support a connection. 3rd parties
can now plug into the Transport.open() logic by implementing their
own TransportProtocol and Transport classes, and registering with
Transport.register().
GUI applications can help the user configure a connection by looking
at the supported fields of a particular TransportProtocol type, which
makes the GUI more dynamic and may better support new Transports.
Change-Id: Iafd8e3a6285261412aac6cba8e2c333f8b7b76a5
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This change adds the --only/ -o option to the commit command.
Change-Id: I44352d56877f8204d985cb7a35a2e0faffb7d341
Signed-off-by: Philipp Thun <philipp.thun@sap.com>
During a review of the class, Josh Bloch pointed out we can use
"i = (i + 1) & mask" to wrap around at the end of the table, instead
of a conditional with a branch. This is generally faster due to one
less branch that will be mis-predicted by the CPU.
Change-Id: Ic88c00455ebc6adde9708563a6ad4d0377442bba
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
* changes:
ObjectIdSubclassMap: Avoid field loads in inner loops
ObjectIdSubclassMap: Manually inline index()
ObjectIdSubclassMap: Change initial size to 2048
ObjectIdSubclassMap: Grow before insertions
ObjectIdSubclassMap: Use & rather than % for hashing
readPipe() may consume rather much time, so
gitPrefix should be cached. If the git executable changes,
users should run FS.detect() again to get a new
instance of FS_Win32.
Ensure the JIT knows the table cannot be changed during the critical
inner loop of get() or insert() by loading the field into a final
local variable. This shouldn't be necessary, but the instance member
is declared non-final (to resizing) and it is not very obvious to the
JIT that the table cannot be modified by AnyObjectId.equals().
Simplify the JIT's decision making by making it obvious, these
values cannot change during the critical inner loop, allowing
for better register allocation.
Change-Id: I0d797533fc5327366f1207b0937c406f02cdaab3
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This method is trivial in definition, and is called in only 3
places. Inline the method manually to ensure its really going
to be inlined by the JIT at runtime.
Change-Id: I128522af8167c07d2de6cc210573599038871dda
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce
Jens Baumgart
Mathias Kinzler
Matthias Sohn
Philipp Thun
Chris Aniszczyk
Marc Strapetz