Move ArchiveCommand into standard porcelain API

Allow use of ArchiveCommand without depending on the jgit command-line
tools.

To avoid complicating the process of installing and upgrading JGit,
this does not add a dependency by the org.eclipse.jgit bundle on
commons-compress.  Instead, the caller is responsible for registering
any formats they want to use by calling ArchiveCommand.registerFormat.

This patch puts functionality that requires an archiver into a
separate org.eclipse.jgit.archive bundle for people who want it.  One
can use it by calling ArchiveCommand.registerFormat directly to
register its formats or by relying on OSGi class loading to load
org.eclipse.jgit.archive.FormatActivator, which takes care of
registration automatically.

Once the appropriate formats are registered, you can make a tar or zip
from a git tree object as follows:

	ArchiveCommand cmd = git.archive();
	try {
		cmd.setTree(tree).setFormat(fmt).setOutputStream(out).call();
	} finally {
		cmd.release();
	}

Change-Id: I418e7e7d76422dc6f010d0b3b624d7bec3b20c6e

1 files changed, 4 insertions, 0 deletions

diff --git a/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties b/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties
index 8b6211efbb..0920c43e8c 100644
--- a/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties
+++ b/org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties
@@ -11,6 +11,8 @@ aNewObjectIdIsRequired=A NewObjectId is required.
 anExceptionOccurredWhileTryingToAddTheIdOfHEAD=An exception occurred while trying to add the Id of HEAD
 anSSHSessionHasBeenAlreadyCreated=An SSH session has been already created
 applyingCommit=Applying {0}
+archiveFormatAlreadyAbsent=Archive format already absent: {0}
+archiveFormatAlreadyRegistered=Archive format already registered: {0}
 atLeastOnePathIsRequired=At least one path is required.
 atLeastOnePatternIsRequired=At least one pattern is required.
 atLeastTwoFiltersNeeded=At least two filters needed.
@@ -182,6 +184,7 @@ errorOccurredDuringUnpackingOnTheRemoteEnd=error occurred during unpacking on th
 errorReadingInfoRefs=error reading info/refs
 errorSymlinksNotSupported=Symlinks are not supported with this OS/JRE
 exceptionCaughtDuringExecutionOfAddCommand=Exception caught during execution of add command
+exceptionCaughtDuringExecutionOfArchiveCommand=Exception caught during execution of archive command
 exceptionCaughtDuringExecutionOfCherryPickCommand=Exception caught during execution of cherry-pick command. {0}
 exceptionCaughtDuringExecutionOfCommitCommand=Exception caught during execution of commit command
 exceptionCaughtDuringExecutionOfFetchCommand=Exception caught during execution of fetch command
@@ -524,6 +527,7 @@ unmergedPaths=Repository contains unmerged paths
 unpackException=Exception while parsing pack stream
 unreadablePackIndex=Unreadable pack index: {0}
 unrecognizedRef=Unrecognized ref: {0}
+unsupportedArchiveFormat=Unknown archive format ''{0}''
 unsupportedCommand0=unsupported command 0
 unsupportedEncryptionAlgorithm=Unsupported encryption algorithm: {0}
 unsupportedEncryptionVersion=Unsupported encryption version: {0}