Doing a keep call with a length of 1 will copy the current entry just
like the previous add was doing, but it avoids doing any validation
on the entry. This is sane because the entry can be assumed to be
already valid, since its originating from the destination index.
Change-Id: I250d902fc98580444af1ba4b8fedceb654541451
Originally: http://thread.gmane.org/gmane.comp.version-control.git/128214/focus=128213
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
A 0 file mode in a DirCacheEntry is not a valid mode. To C git
such a value indicates the record should not be present. We already
were catching this bad state and exceptioning out when writing tree
objects to disk, but we did not fail when writing the dircache back
to disk. This allowed JGit applications to create a dircache file
which C git would not like to read.
Instead of checking the mode during writes, we now check during
mutation. This allows application bugs to be detected sooner and
closer to the cause site. It also allows us to avoid checking most
of the records which we read in from disk, as we can assume these
are formatted correctly.
Some of our unit tests were not setting the FileMode on their test
entry, so they had to be updated to use REGULAR_FILE.
Change-Id: Ie412053c390b737c0ece57b8e063e4355ee32437
Originally: http://thread.gmane.org/gmane.comp.version-control.git/128214/focus=128213
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
CC: Adam W. Hawks <awhawks@writeme.com>
A dircache record must not use a path string like "/a" or "a//b"
as this results in a tree entry being written with a zero length
name component in the record. C git does not support an empty name,
and neither does any modern filesystem.
A record also must not have a stage outside of the standard 0-3
value range, as there are only 2 bits of space available in the
on-disk format of the record to store the stage information.
Any other values would be truncated into this space, storing a
different value than the caller expected.
If an application tries to create a DirCache record with either of
these wrong values, we abort with an IllegalArgumentException.
Change-Id: I699de149efdfccd85d8adde07d3efd080e3b49c2
Originally: http://thread.gmane.org/gmane.comp.version-control.git/128214
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
CC: Adam W. Hawks <awhawks@writeme.com>
Rather than implementing the file reading logic ourselves, and
wind up leaking the FileInputStream's file descriptor until the
next GC, use IO.readFully(File) which wraps the read loop inside
of a try/finally to ensure the stream is closed before it exits.
Change-Id: I85a3fe87d5eff88fa788962004aebe19d2e91bb4
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Reviewed-by: Roland Grunberg <rgrunber@redhat.com>
Actually set the range of versions we are willing to accept for
each package we import, lest we import something in the future
that isn't compatible with our needs.
Change-Id: I25dbbb9eaabe852631b677e0c608792b3ed97532
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
ObjectWalk is invoking next() for each record we consider in a tree.
Rather than doing several method calls against the current parser,
and testing if we are at eof() at least twice per next() invocation,
do it only once and inline the logic to move the parser forward.
Change-Id: If5938f5d7b3ca24f500a184c9bd2ef193015414e
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
The supplied test case comes out of the example tree identified by
Robert de Wilde and Ilari on #git:
$ git ls-tree -rt a54f1a85ebf6a7f53aa60a45a1be33f8b078fb7e
040000 tree bfe058ad536cdb12e127cde63b01472c960ea105 A
040000 tree 4b825dc642 A/A
040000 tree 4b825dc642 A/B
100644 blob abbbfafe3129f85747aba7bfac992af77134c607 B
In this tree, "B" was being skipped because "A/A" as an empty tree
was immediately followed by "A/B", also an empty tree, but the
ObjectWalk broke out too early and never visited "B".
Bug: 286653
Change-Id: I25bcb0bc99d0cbbbdd9c2bd625ad6a691a6d0335
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
During dispose() or reset() we are suppose to be restoring the
ObjectWalk instance back to the original pre-walk state, but we
failed to reset the tree parser. This can lead to confusing state
if the ObjectWalk was reused by the caller, as entries from the
old walk might be reported as part of the new walk.
Change-Id: I6237bae7bfd3794e8b9a92b4dd475559cc72e634
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Instead of including "ObjectId[SHA-1]" in the message, just
us the formatted SHA-1 name of the object by calling name().
Change-Id: I0d1d0e8207f8a3f02188e60242e4e9bf7420e88f
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
We didn't skip the correct number of bytes when we skipped over an
unrecognized but optional dircache extension. We missed skipping
the 8 byte header that makes up the extension's name and length.
We also didn't include the skipped extension's payload as part of
our index checksum, resuting in a checksum failure when the index
was done reading. So ensure we always scan through a skipped
section and include it in the checksum computation.
Add a test case for a currently unsupported index extension, 'ZZZZ',
to verify we can still read the DirCache object even though we
don't know what 'ZZZZ' is supposed to mean.
Bug: 301287
Change-Id: I4bdde94576fffe826d0782483fd98cab1ea628fa
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
If the repository is empty, we have no HEAD branch, which means we
can't test to see if the HEAD is detached and should be advertised
as a .have line.
Change-Id: I6e85f836e7db057cede812d0d6c1aecbd6cbe6c5
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
The unsetSection method can be used to delete an entire configuration
block, such as a [branch ""] or [remote ""] section in a file.
Change-Id: I93390c9b2187eb1b0d51353518feaed83bed2aad
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Config was confusing the following two variables when writing the
file back to text format:
[my]
empty =
enabled
When parsed, we say that my.empty has 1 value, null, and my.enabled
is an empty string value that in boolean context should be evaluated
as true.
Saving this configuration file back to text format was ignoring the
null value for my.empty, producing a completely different file than
what Config read:
[my]
empty
enabled
Instead handle the writing differently to ensure the original format
is output. New tests cases cover the expected behavior and return
values from accessor methods.
Change-Id: Id37379ce20cb27e3330923cf989444dd9f2bdd96
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
We don't want to use the JRE cache when fetching content.
Change-Id: Id76f3e618967c98ed4fbc47a1a2a9e77acbe41ab
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
If remote.name.uploadpack or .receivepack is misconfigured and points
to a non-existent command on the remote system, we should receive back
exit status 127. Report this case specially with the command we used
so the user knows what is going.
Bug: 293703
Change-Id: I7504e7b6238d5d8e698d37db7411c4817a039d08
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Annotated tags created with C Git versions before the introduction
of c818566 ([PATCH] Update tags to record who made them, 2005-07-14),
do not have a "tagger" line present in the object header. This line
did not appear in C Git until v0.99.1~9.
Ancient projects such as the Linux kernel contain such tags, for
example Linux 2.6.12 is older than when this feature first appeared
in C Git. Linux v2.6.13-rc4 in late July 2005 is the first kernel
version tag to actually contain a tagger line.
It is therefore acceptable for the header to be missing, and for
the RevTag.getTaggerIdent() method to return null.
Since the Javadoc for getTaggerIdent() already explained that the
identity may be null, we just need to test that this is true when
the header is missing, and allow the ObjectChecker to pass anyway.
Change-Id: I34ba82e0624a0d1a7edcf62ffba72260af6f7e5d
See: http://code.google.com/p/gerrit/issues/detail?id=399
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Technically our project name is "JGit", not "Java Git". In fact
there is already another project called "JavaGit" (no space) that we
don't want to become confused with. Ensure we always call ourselves
"JGit" in user visible assets, like the bundle name.
Other Eclipse products list their provider as "Eclipse.org",
not "eclipse.org". So list ourselves that way in all of our
plugin.properties files.
Change-Id: Ibcea1cd6dda2af757a8584099619fc23b7779a84
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Don't copy and sort the set of references if they are passed through
in a RefMap or a SortedMap using the key's natural sort ordering.
Either map is already in the order we want to present the items
to the client in, so copying and sorting is a waste of local CPU
and memory.
Change-Id: I49ada7c1220e0fc2a163b9752c2b77525d9c82c1
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
By using RefUpdate for symbolic reference creation we can reuse
the logic related to updating the reflog with the event, without
needing to expose something such as the legacy ReflogWriter class
(which we no longer have).
Applications using writeSymref must update their code to use the
new pattern of changing the reference through the updateRef method:
String refName = "refs/heads/master";
RefUpdate u = repository.updateRef(Constants.HEAD);
u.setRefLogMessage("checkout: moving to " + refName, false);
switch (u.link(refName)) {
case NEW:
case FORCED:
case NO_CHANGE:
// A successful update of the reference
break;
default:
// Handle the failure, e.g. for older behavior
throw new IOException(u.getResult());
}
Change-Id: I1093e1ec2970147978a786cfdd0a75d0aebf8010
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This commit actually does three major changes to the way references
are handled within JGit. Unfortunately they were easier to do as
a single massive commit than to break them up into smaller units.
Disambiguate symbolic references:
---------------------------------
Reporting a symbolic reference such as HEAD as though it were
any other normal reference like refs/heads/master causes subtle
programming errors. We have been bitten by this error on several
occasions, as have some downstream applications written by myself.
Instead of reporting HEAD as a reference whose name differs from
its "original name", report it as an actual SymbolicRef object
that the application can test the type and examine the target of.
With this change, Ref is now an abstract type with different
subclasses for the different types.
In the classical example of "HEAD" being a symbolic reference to
branch "refs/heads/master", the Repository.getAllRefs() method
will now return:
Map<String, Ref> all = repository.getAllRefs();
SymbolicRef HEAD = (SymbolicRef) all.get("HEAD");
ObjectIdRef master = (ObjectIdRef) all.get("refs/heads/master");
assertSame(master, HEAD.getTarget());
assertSame(master.getObjectId(), HEAD.getObjectId());
assertEquals("HEAD", HEAD.getName());
assertEquals("refs/heads/master", master.getName());
A nice side-effect of this change is the storage type of the
symbolic reference is no longer ambiguous with the storge type
of the underlying reference it targets. In the above example,
if master was only available in the packed-refs file, then the
following is also true:
assertSame(Ref.Storage.LOOSE, HEAD.getStorage());
assertSame(Ref.Storage.PACKED, master.getStorage());
(Prior to this change we returned the ambiguous storage of
LOOSE_PACKED for HEAD, which was confusing since it wasn't
actually true on disk).
Another nice side-effect of this change is all intermediate
symbolic references are preserved, and are therefore visible
to the application when they walk the target chain. We can
now correctly inspect chains of symbolic references.
As a result of this change the Ref.getOrigName() method has been
removed from the API. Applications should identify a symbolic
reference by testing for isSymbolic() and not by using an arcane
string comparsion between properties.
Abstract the RefDatabase storage:
---------------------------------
RefDatabase is now abstract, similar to ObjectDatabase, and a
new concrete implementation called RefDirectory is used for the
traditional on-disk storage layout. In the future we plan to
support additional implementations, such as a pure in-memory
RefDatabase for unit testing purposes.
Optimize RefDirectory:
----------------------
The implementation of the in-memory reference cache, reading, and
update routines has been completely rewritten. Much of the code
was heavily borrowed or cribbed from the prior implementation,
so copyright notices have been left intact as much as possible.
The RefDirectory cache no longer confuses symbolic references
with normal references. This permits the cache to resolve the
value of a symbolic reference as late as possible, ensuring it
is always current, without needing to maintain reverse pointers.
The cache is now 2 sorted RefLists, rather than 3 HashMaps.
Using sorted lists allows the implementation to reduce the
in-memory footprint when storing many refs. Using specialized
types for the elements allows the code to avoid additional map
lookups for auxiliary stat information.
To improve scan time during getRefs(), the lists are returned via
a copy-on-write contract. Most callers of getRefs() do not modify
the returned collections, so the copy-on-write semantics improves
access on repositories with a large number of packed references.
Iterator traversals of the returned Map<String,Ref> are performed
using a simple merge-join of the two cache lists, ensuring we can
perform the entire traversal in linear time as a function of the
number of references: O(PackedRefs + LooseRefs).
Scans of the loose reference space to update the cache run in
O(LooseRefs log LooseRefs) time, as the directory contents
are sorted before being merged against the in-memory cache.
Since the majority of stable references are kept packed, there
typically are only a handful of reference names to be sorted,
so the sorting cost should not be very high.
Locking is reduced during getRefs() by taking advantage of the
copy-on-write semantics of the improved cache data structure.
This permits concurrent readers to pull back references without
blocking each other. If there is contention updating the cache
during a scan, one or more updates are simply skipped and will
get picked up again in a future scan.
Writing to the $GIT_DIR/packed-refs during reference delete is
now fully atomic. The file is locked, reparsed fresh, and written
back out if a change is necessary. This avoids all race conditions
with concurrent external updates of the packed-refs file.
The RefLogWriter class has been fully folded into RefDirectory
and is therefore deleted. Maintaining the reference's log is
the responsiblity of the database implementation, and not all
implementations will use java.io for access.
Future work still remains to be done to abstract the ReflogReader
class away from local disk IO.
Change-Id: I26b9287c45a4b2d2be35ba2849daa316f5eec85d
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Translate the version qualifier using maven-antrun-plugin since we want
manifest-first and currently cannot rely on Tycho for the JGit build.
Introduce property for Eclipse p2 repository to enable builds against
other Eclipse versions.
Change-Id: I62c4e77ae91fe17f56c5a5338d53828d4e225395
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
These types can be used by RefDatabase implementations to manage
the collection.
A RefList stores items sorted by their name, and is an immutable
type using copy-on-write semantics to perform modifications to
the collection. Binary search is used to locate an existing item
by name, or to locate the proper insertion position if an item does
not exist.
A RefMap can merge up to 3 RefList collections at once during its
entry iteration, allowing items in the resolved or loose RefList
to override items by the same name in the packed RefList.
The RefMap's goal is O(log N) lookup time, and O(N) iteration time,
which is suitable for returning from a RefDatabase. By relying on
the immutable RefList we might be able to make map construction
nearly constant, making Repository.getAllRefs() an inexpensive
operation if the caches are current. Since modification is not
common, changes require up to O(N + log N) time to copy the internal
list and collapse or expand the list's array. As most changes
are made to the loose collection and not the packed collection,
in practice most changes would require less than the full O(N)
time, due to a significantly smaller N in the loose list.
Almost complete test coverage is included in the corresponding
unit tests. A handful of methods on RefMap are not tested in this
change, as writing the proper test depends on a future refactoring
of how the Ref class represents symbolic reference names.
Change-Id: Ic2095274000336556f719edd75a5c5dd6dd1d857
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
On Windows systems, file system lookup is a slow operation, so
checking each object if it exists during indexing (after receiving
the pack) could take a siginificant time. This patch introduces
CachedObjectDirectory that pre-caches lookup results.
Bug: 300397
Change-Id: I471b93f9bb3ee173eb37cae1d75e9e4eb49985e7
Signed-off-by: Constantine Plotnikov <constantine.plotnikov@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Not all occurrences of ".git" are replaced by this constant, only
those where it actually refers to the directory with that name, i.e
not the ".git" directory suffix.
Asserts and comment are also excluded from replacement.
Change-Id: I65a9da89aedd53817f2ea3eaab4f9c2bed35d7ee
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
No Eclipse support for this project is provided, because the
Jetty project does not publish a complete P2 repository.
Change-Id: Ic5fe2e79bb216e36920fd4a70ec15dd6ccfd1468
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
The dumb HTTP transport needs to download the HEAD ref and
resolve it manually if HEAD does not appear in info/refs.
Its typically for it to not be in the info/refs file.
Change-Id: Ie2a58fdfacfeee530b10edb433b8f98c85568585
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
During fetch over http:// clients now try to take advantage of
the info/refs?service=git-upload-pack URL to determine if the
remote side will support a standard upload-pack command stream.
If so each block of 32 have lines is sent in one POST request,
prefixed by all of the 'want' lines and any previously discovered
common bases as 'have' lines.
During push over http:// clients now try to take advantage of
the info/refs?service=git-receive-pack URL to determine if the
remote side will support a standard receive-pack command stream.
If so, commands are sent along with their pack in a single HTTP
POST request.
Bug: 291002
Change-Id: I8c69b16ac15c442e1a4c3bd60b4ea1a47882b851
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This is a simple HTTP server that provides the minimum server side
support required for dumb (non-git aware) transport clients.
We produce the info/refs and objects/info/packs file on the fly
from the local repository state, but otherwise serve data as raw
files from the on-disk structure.
In the future we could better optimize the FileSender class and the
servlets that use it to take advantage of direct file to network
APIs in more advanced servlet containers like Jetty.
Our glue package borrows the idea of a micro embedded DSL from
Google Guice and uses it to configure a collection of Filters
and HttpServlets, all of which are matched against requests using
regular expressions. If a subgroup exists in the pattern, it is
extracted and used for the path info component of the request.
Change-Id: Ia0f1a425d07d035e344ae54faf8aeb04763e7487
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
By making this class and its methods public, and the actual writing
abstract, we can reuse this code for other formats like writing an
info/refs file for HTTP transports.
Change-Id: Id0e349c30a0f5a8c1527e0e7383b80243819d9c5
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
If biDirectionalPipe is false UploadPack does not start out with
the advertisement but instead assumes it should read one block of
want/have lines, process that, and write the ACK/NAKs out.
This means it only is doing one read through the input followed by
one write to the output, which fits with the HTTP request processing
model, and any other type of RPC system.
Change-Id: Ia9f7c46ee556f996367180f15d2caa8572cdd59f
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
If biDirectionalPipe is false ReceivePack does not start out with the
advertisement but instead assumes it should read the command set once,
process that, and write the status report out. This means it only is
doing one read through the input followed by one write to the output,
which fits with the HTTP request processing model, and any other type
of RPC system... assuming that the payload for input can be a very big
entity like the command stream followed by the pack file.
Change-Id: I6f31f6537a3b7498803a8a54e10b0622105718c1
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Later we are going to add support for smart HTTP, which requires us to
buffer at least some of the request created by a client before we ship
it to the server. For many requests, we can fit it completely into a
1 MiB buffer, but if it doesn't we can drop back to using the chunked
transfer encoding to send an unknown stream length.
Rather than recoding the block based memory buffer, we refactor the
local file overflow strategy into a subclass, allowing the HTTP client
code to replace this portion of the logic with its own approach to
start the chunked encoding request.
Change-Id: Iac61ea1017b14e0ad3c4425efc3d75718b71bb8e
Signed-off-by: Shawn O. Pearce <sop@google.com>
The multi_ack_detailed extension breaks out the "ACK %s continue" status
code into "ACK %s common" and "ACK %s ready" states, making it easier to
discover which objects are truely common, and which objects are simply
on a chain the server doesn't care learning about.
Change-Id: Ie8e907424cfbbba84996ca205d49eacf339f9d04
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Under unit tests we want the when and timezone to come from the
MockSystemReader and be stable. We did this for the default
constructor based on the Repository, but failed to do it for the
name,emailAddress variant of the constructor.
Change-Id: I608ac7cf01673729303395e19b379b38fef136b3
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
We really mean to omit HEAD here, but botched the difference between
getOrigName and getName on the Ref object. We tested on the wrong
value, picking up the target of the symbolic ref and therefore
included it twice.
Change-Id: If780c65166ccada2e63a4f42bbab752a56b16564
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Since Robin reverted using the maven-bundle-plugin to produce the
OSGi manifest, there is no reason for us to reference it from our
build process anymore.
Also, when Robin reverted the to the Eclipse way of doing things,
we failed to update the ignore files to ignore our generated files
but not ignore our tracked .classpath.
Finally, we cannot delete the MANIFEST.MF file during a Maven build,
as this is once again a source file.
Change-Id: I53f77f2002cb4285f728968829560e835651e188
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This restores the ability to build using just Eclipse without
strange procedures, extra plugins and it is again possible to
work on both JGit and EGit in the same Eclipse workspace with
ease.
Change-Id: I0af08127d507fbce186f428f1cdeff280f0ddcda
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
The C Git documentation stated that the core.worktree config was
not read when the .git directory was found implicitly (from the
working directory).
This was not true, and had not been so for a long time. The
documentation has been updated to document the existing behaviour.
Change-Id: If1e81b6a981b9d70e849f24872f01c110e9bc950
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Deflater can use significant amount of native (i.e. C) heap
space. Failure to promptly release this memory results
in native memory leak in some cases, particularly severe for
VMs with large java max heap size. For example, running
Team->Commit in one of my EGit workspaces results in ~500M
java process size increase without any significant change
to amount of used java heap when JVM is started with -Xmx1024m.
Change-Id: I649679a8df5683ebedd9380d703513d31c625932
Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Adds the file content merge alorithm and tests for merge to jgit.
The merge algorithm:
- Gets as input parameters the common base, the two new contents
called "ours" and "theirs".
- Computes the Edits from base to ours and from base to theirs with
the help of MyersDiff.
- Iterates over the edits.
- Independent edits from ours or from theirs will just be applied
to the result.
- For conflicting edits we first harmonize the ranges of the edits
so that in the end we have exactly two edits starting and ending
at the same points in the common base. Then we write the two
conclicting contents into the result stream.
Change-Id: I411862393e7bf416b6f33ca55ec5af608ff4663
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
[sp: Fixed up two awkard comments in documentation.]
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
The UnionInputStream utility class combines multiple sequential
InputStreams so they appear to the caller as a single stream with
no gaps. This can be used to concentate streams coming from multiple
independent HTTP connections (for example).
The companion unit test covers the class's full functionality.
Change-Id: I0676c7b5e082a5886bf0e8f43f9fd6c46a666228
Signed-off-by: Shawn O. Pearce <sop@google.com>
This exposes the list of known packs, allowing callers to list them
into a context like the objects/info/packs file.
Change-Id: I0b889564bd176836ff5c77ba310c6d229409dcd5
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Tycho isn't production ready for projects like JGit to be using as
their primary build driver. Some problems we ran into with Tycho
0.6.0 that are preventing us from using it are:
* Tycho can't run offline
The P2 artifact resolver cannot perform its work offline. If the
build system has no network connection, it cannot compile a
project through Tycho. This is insane for a distributed version
control system where developers are used to being offline during
development and local testing.
* Magic state in ~/.m2/repository/.meta/p2-metadata.properties
Earlier iterations of this patch tried to use a hybrid build,
where Tycho was only used for the Eclipse specific feature and P2
update site, and maven-bundle-plugin was used for the other code.
This build seemed to work, but only due to magic Tycho specific
state held in my local home directory. This means builds are not
consistently repeatable across systems, and lead me to believe
I had a valid build, when in fact I did not.
* Manifest-first build produces incomplete POMs
The POM created by the manifest-first build format does not
contain the dependency chain, leading a downstream consumer to
not import the runtime dependencies necessary to execute the
bundle it has imported. In JGit's case, this means JSch isn't
included in our dependency chain.
* Manifest-first build produces POMs unreadable by Maven 2.x
JGit has existing application consumers who are relying on
Maven 2.x builds. Forcing them to step up to an alpha release
of Maven 3 is simply unacceptable.
* OSGi bundle export data management is tedious
Editing each of our pom.xml files to mark a new release is
difficult enough as it is. Editing every MANIFEST.MF file to
list our exported packages and their current version number is
something a machine should do, not a human. Yet the Tycho OSGi
way unfortunately demands that a human do this work.
* OSGi bundle import data management is tedious
There isn't a way in the MANIFEST.MF file format to reuse the
same version tags across all of our imports, but we want to have
a consistent view of our dependencies when we compile JGit.
After wasting more than 2 full days trying to get Tycho to work,
I've decided its a lost cause right now. We need to be chasing down
bugs and critical features, not trying to bridge the gap between
the stable Maven repository format and the undocumented P2 format
used only by Eclipse.
So, switch the build to use Apache Felix's maven-bundle-plugin.
This is the same plugin Jetty uses to produce their OSGi bundle
manifests, and is the same plugin used by the Apache Felix project,
which is an open-source OSGi runtime. It has a reasonable number
of folks using it for production builds, and is running on top of
the stable Maven 2.x code base.
With this switch we get automatically generated MANIFEST.MF files
based on reasonably sane default rules, which reduces the amount
of things we have to maintain by hand. When necessary, we can add
a few lines of XML to our POMs to tweak the output.
Our build artifacts are still fully compatible with Maven 2.x, so
any downstream consumers are still able to use our build products,
without stepping up to Maven 3.x. Our artifacts are also valid as
OSGi bundles, provided they are organized on disk into a repository
that the runtime can read.
With maven-bundle-plugin the build runs offline, as much as Maven
2.x is able to run offline anyway, so we're able to return to a
distributed development environment again.
By generating MANIFEST.MF at the top level of each project (and
therefore outside of the target directory), we're still compatible
with Eclipse's PDE tooling. Our projects can be imported as standard
Maven projects using the m2eclipse plugin, but the PDE will think
they are vaild plugins and make them available for plugin builds,
or while debugging another workbench.
This change also completely removes Tycho from the build.
Unfortunately, Tycho 0.6.0's pom-first dependency resolver is broken
when resolving a pom-first plugin bundle through a manifest-first
feature package, so bundle org.eclipse.jgit can't be resolved,
even though it might actually exist in the local Maven repository.
Rather than fight with Tycho any further, I'm just declaring it
plugina-non-grata and ripping it out of the build.
Since there are very few tools to build a P2 format repository, and
no documentation on how to create one without running the Eclipse
UI manually by poking buttons, I'm declaring that we are not going
to produce a P2 update site from our automated builds.
Change-Id: If7938a86fb0cc8e25099028d832dbd38110b9124
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This makes the jgit command line behave like the C Git implementation
in the respect.
These variables are not recognized in the core, though we add support
to do the overrides there. Hence other users of the JGit library, like
the Eclipse plugin and others, will not be affected.
GIT_DIR
The location of the ".git" directory.
GIT_WORK_TREE
The location of the work tree.
GIT_INDEX_FILE
The location of the index file.
GIT_CEILING_DIRECTORIES
A colon (semicolon on Windows) separated list of paths that
which JGit will not cross when looking for the .git directory.
GIT_OBJECT_DIRECTORY
The location of the objects directory under which objects are
stored.
GIT_ALTERNATE_OBJECT_DIRECTORIES
A colon (semicolon on Windows) separated list of object directories
to search for objects.
In addition to these we support the core.worktree config setting when
the git directory is set deliberately instead of being found.
Change-Id: I2b9bceb13c0f66b25e9e3cefd2e01534a286e04c
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Shawn O. Pearce
Chris Aniszczyk
Matthias Sohn
Constantine Plotnikov
Robin Rosenberg
Shawn O. Pearce
Igor Fedorenko
Christian Halstrick