2 * Copyright (C) 2006 Shawn Pearce <spearce@spearce.org>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License, version 2, as published by the Free Software Foundation.
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this library; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
17 package org
.spearce
.jgit
.lib
;
19 import java
.io
.BufferedReader
;
21 import java
.io
.FileNotFoundException
;
22 import java
.io
.FileReader
;
23 import java
.io
.FilenameFilter
;
24 import java
.io
.IOException
;
25 import java
.util
.ArrayList
;
26 import java
.util
.Collection
;
27 import java
.util
.HashMap
;
31 import org
.spearce
.jgit
.errors
.IncorrectObjectTypeException
;
32 import org
.spearce
.jgit
.errors
.ObjectWritingException
;
33 import org
.spearce
.jgit
.errors
.RevisionSyntaxException
;
34 import org
.spearce
.jgit
.stgit
.StGitPatch
;
35 import org
.spearce
.jgit
.util
.FS
;
38 * Represents a Git repository. A repository holds all objects and refs used for
39 * managing source code (could by any type of file, but source code is what
40 * SCM's are typically used for).
42 * In Git terms all data is stored in GIT_DIR, typically a directory called
43 * .git. A work tree is maintained unless the repository is a bare repository.
44 * Typically the .git directory is located at the root of the work dir.
49 * <li>objects/ - objects</li>
50 * <li>refs/ - tags and heads</li>
51 * <li>config - configuration</li>
52 * <li>info/ - more configurations</li>
57 * This implementation only handles a subtly undocumented subset of git features.
60 public class Repository
{
61 private static final String
[] refSearchPaths
= { "", "refs/", "refs/tags/",
62 Constants
.HEADS_PREFIX
+ "/", "refs/" + Constants
.REMOTES_PREFIX
+ "/" };
64 private final File gitDir
;
66 private final File
[] objectsDirs
;
68 private final File refsDir
;
70 private final File packedRefsFile
;
72 private final RepositoryConfig config
;
74 private PackFile
[] packs
;
76 private final WindowCache windows
;
78 private GitIndex index
;
81 * Construct a representation of this git repo managing a Git repository.
87 public Repository(final File d
) throws IOException
{
92 * Construct a representation of a Git repository.
95 * cache this repository's data will be cached through during
96 * access. May be shared with another repository, or null to
97 * indicate this repository should allocate its own private
100 * GIT_DIR (the location of the repository metadata).
101 * @throws IOException
102 * the repository appears to already exist but cannot be
105 public Repository(final WindowCache wc
, final File d
) throws IOException
{
106 gitDir
= d
.getAbsoluteFile();
108 objectsDirs
= readObjectsDirs(FS
.resolve(gitDir
, "objects"),
109 new ArrayList
<File
>()).toArray(new File
[0]);
110 } catch (IOException e
) {
111 IOException ex
= new IOException("Cannot find all object dirs for " + gitDir
);
115 refsDir
= FS
.resolve(gitDir
, "refs");
116 packedRefsFile
= FS
.resolve(gitDir
, "packed-refs");
117 packs
= new PackFile
[0];
118 config
= new RepositoryConfig(this);
120 final boolean isExisting
= objectsDirs
[0].exists();
123 final String repositoryFormatVersion
= getConfig().getString(
124 "core", null, "repositoryFormatVersion");
125 if (!"0".equals(repositoryFormatVersion
)) {
126 throw new IOException("Unknown repository format \""
127 + repositoryFormatVersion
+ "\"; expected \"0\".");
130 getConfig().create();
132 windows
= wc
!= null ? wc
: new WindowCache(getConfig());
137 private Collection
<File
> readObjectsDirs(File objectsDir
, Collection
<File
> ret
) throws IOException
{
139 final File altFile
= FS
.resolve(objectsDir
, "info/alternates");
140 if (altFile
.exists()) {
141 BufferedReader ar
= new BufferedReader(new FileReader(altFile
));
142 for (String alt
=ar
.readLine(); alt
!=null; alt
=ar
.readLine()) {
143 readObjectsDirs(FS
.resolve(objectsDir
, alt
), ret
);
151 * Create a new Git repository initializing the necessary files and
154 * @throws IOException
156 public void create() throws IOException
{
157 if (gitDir
.exists()) {
158 throw new IllegalStateException("Repository already exists: "
164 objectsDirs
[0].mkdirs();
165 new File(objectsDirs
[0], "pack").mkdir();
166 new File(objectsDirs
[0], "info").mkdir();
169 new File(refsDir
, "heads").mkdir();
170 new File(refsDir
, "tags").mkdir();
172 new File(gitDir
, "branches").mkdir();
173 new File(gitDir
, "remotes").mkdir();
174 writeSymref("HEAD", "refs/heads/master");
176 getConfig().create();
183 public File
getDirectory() {
188 * @return the directory containg the objects owned by this repository.
190 public File
getObjectsDirectory() {
191 return objectsDirs
[0];
195 * @return the configuration of this repository
197 public RepositoryConfig
getConfig() {
202 * @return the cache needed for accessing packed objects in this repository.
204 public WindowCache
getWindowCache() {
209 * Construct a filename where the loose object having a specified SHA-1
210 * should be stored. If the object is stored in a shared repository the path
211 * to the alternative repo will be returned. If the object is not yet store
212 * a usable path in this repo will be returned. It is assumed that callers
213 * will look for objects in a pack first.
216 * @return suggested file name
218 public File
toFile(final AnyObjectId objectId
) {
219 final String n
= objectId
.toString();
220 String d
=n
.substring(0, 2);
221 String f
=n
.substring(2);
222 for (int i
=0; i
<objectsDirs
.length
; ++i
) {
223 File ret
= new File(new File(objectsDirs
[i
], d
), f
);
227 return new File(new File(objectsDirs
[0], d
), f
);
232 * @return true if the specified object is stored in this repo or any of the
233 * known shared repositories.
235 public boolean hasObject(final AnyObjectId objectId
) {
236 int k
= packs
.length
;
239 if (packs
[--k
].hasObject(objectId
))
243 return toFile(objectId
).isFile();
248 * SHA-1 of an object.
250 * @return a {@link ObjectLoader} for accessing the data of the named
251 * object, or null if the object does not exist.
252 * @throws IOException
254 public ObjectLoader
openObject(final AnyObjectId id
)
256 return openObject(new WindowCursor(),id
);
261 * temporary working space associated with the calling thread.
263 * SHA-1 of an object.
265 * @return a {@link ObjectLoader} for accessing the data of the named
266 * object, or null if the object does not exist.
267 * @throws IOException
269 public ObjectLoader
openObject(final WindowCursor curs
, final AnyObjectId id
)
271 int k
= packs
.length
;
275 final ObjectLoader ol
= packs
[--k
].get(curs
, id
);
278 } catch (IOException ioe
) {
279 // This shouldn't happen unless the pack was corrupted
280 // after we opened it or the VM runs out of memory. This is
281 // a know problem with memory mapped I/O in java and have
282 // been noticed with JDK < 1.6. Tell the gc that now is a good
283 // time to collect and try once more.
287 final ObjectLoader ol
= packs
[k
].get(curs
, id
);
290 } catch (IOException ioe2
) {
291 ioe2
.printStackTrace();
292 ioe
.printStackTrace();
293 // Still fails.. that's BAD, maybe the pack has
294 // been corrupted after all, or the gc didn't manage
295 // to release enough previously mmaped areas.
301 return new UnpackedObjectLoader(this, id
.toObjectId());
302 } catch (FileNotFoundException fnfe
) {
310 * @return an {@link ObjectLoader} for accessing the data of a named blob
311 * @throws IOException
313 public ObjectLoader
openBlob(final ObjectId id
) throws IOException
{
314 return openObject(id
);
320 * @return an {@link ObjectLoader} for accessing the data of a named tree
321 * @throws IOException
323 public ObjectLoader
openTree(final ObjectId id
) throws IOException
{
324 return openObject(id
);
328 * Access a Commit object using a symbolic reference. This reference may
329 * be a SHA-1 or ref in combination with a number of symbols translating
330 * from one ref or SHA1-1 to another, such as HEAD^ etc.
332 * @param revstr a reference to a git commit object
333 * @return a Commit named by the specified string
334 * @throws IOException for I/O error or unexpected object type.
336 * @see #resolve(String)
338 public Commit
mapCommit(final String revstr
) throws IOException
{
339 final ObjectId id
= resolve(revstr
);
340 return id
!= null ?
mapCommit(id
) : null;
344 * Access any type of Git object by id and
347 * SHA-1 of object to read
348 * @param refName optional, only relevant for simple tags
349 * @return The Git object if found or null
350 * @throws IOException
352 public Object
mapObject(final ObjectId id
, final String refName
) throws IOException
{
353 final ObjectLoader or
= openObject(id
);
354 final byte[] raw
= or
.getBytes();
355 if (or
.getType() == Constants
.OBJ_TREE
)
356 return makeTree(id
, raw
);
357 if (or
.getType() == Constants
.OBJ_COMMIT
)
358 return makeCommit(id
, raw
);
359 if (or
.getType() == Constants
.OBJ_TAG
)
360 return makeTag(id
, refName
, raw
);
361 if (or
.getType() == Constants
.OBJ_BLOB
)
367 * Access a Commit by SHA'1 id.
369 * @return Commit or null
370 * @throws IOException for I/O error or unexpected object type.
372 public Commit
mapCommit(final ObjectId id
) throws IOException
{
373 final ObjectLoader or
= openObject(id
);
376 final byte[] raw
= or
.getBytes();
377 if (Constants
.OBJ_COMMIT
== or
.getType())
378 return new Commit(this, id
, raw
);
379 throw new IncorrectObjectTypeException(id
, Constants
.TYPE_COMMIT
);
382 private Commit
makeCommit(final ObjectId id
, final byte[] raw
) {
383 Commit ret
= new Commit(this, id
, raw
);
388 * Access a Tree object using a symbolic reference. This reference may
389 * be a SHA-1 or ref in combination with a number of symbols translating
390 * from one ref or SHA1-1 to another, such as HEAD^{tree} etc.
392 * @param revstr a reference to a git commit object
393 * @return a Tree named by the specified string
394 * @throws IOException
396 * @see #resolve(String)
398 public Tree
mapTree(final String revstr
) throws IOException
{
399 final ObjectId id
= resolve(revstr
);
400 return id
!= null ?
mapTree(id
) : null;
404 * Access a Tree by SHA'1 id.
406 * @return Tree or null
407 * @throws IOException for I/O error or unexpected object type.
409 public Tree
mapTree(final ObjectId id
) throws IOException
{
410 final ObjectLoader or
= openObject(id
);
413 final byte[] raw
= or
.getBytes();
414 if (Constants
.OBJ_TREE
== or
.getType()) {
415 return new Tree(this, id
, raw
);
417 if (Constants
.OBJ_COMMIT
== or
.getType())
418 return mapTree(ObjectId
.fromString(raw
, 5));
419 throw new IncorrectObjectTypeException(id
, Constants
.TYPE_TREE
);
422 private Tree
makeTree(final ObjectId id
, final byte[] raw
) throws IOException
{
423 Tree ret
= new Tree(this, id
, raw
);
427 private Tag
makeTag(final ObjectId id
, final String refName
, final byte[] raw
) {
428 Tag ret
= new Tag(this, id
, refName
, raw
);
433 * Access a tag by symbolic name.
436 * @return a Tag or null
437 * @throws IOException on I/O error or unexpected type
439 public Tag
mapTag(String revstr
) throws IOException
{
440 final ObjectId id
= resolve(revstr
);
441 return id
!= null ?
mapTag(revstr
, id
) : null;
445 * Access a Tag by SHA'1 id
448 * @return Commit or null
449 * @throws IOException for I/O error or unexpected object type.
451 public Tag
mapTag(final String refName
, final ObjectId id
) throws IOException
{
452 final ObjectLoader or
= openObject(id
);
455 final byte[] raw
= or
.getBytes();
456 if (Constants
.OBJ_TAG
== or
.getType())
457 return new Tag(this, id
, refName
, raw
);
458 return new Tag(this, id
, refName
, null);
462 * Get a locked handle to a ref suitable for updating or creating.
464 * @param ref name to lock
465 * @return a locked ref
466 * @throws IOException
468 public LockFile
lockRef(final String ref
) throws IOException
{
469 final Ref r
= readRef(ref
, true);
470 final LockFile l
= new LockFile(fileForRef(r
.getName()));
471 return l
.lock() ? l
: null;
475 * Create a command to update (or create) a ref in this repository.
478 * name of the ref the caller wants to modify.
479 * @return an update command. The caller must finish populating this command
480 * and then invoke one of the update methods to actually make a
482 * @throws IOException
483 * a symbolic ref was passed in and could not be resolved back
484 * to the base ref, as the symbolic ref could not be read.
486 public RefUpdate
updateRef(final String ref
) throws IOException
{
487 final Ref r
= readRef(ref
, true);
488 return new RefUpdate(this, r
, fileForRef(r
.getName()));
492 * Parse a git revision string and return an object id.
494 * Currently supported is combinations of these.
496 * <li>SHA-1 - a SHA-1</li>
497 * <li>refs/... - a ref name</li>
498 * <li>ref^n - nth parent reference</li>
499 * <li>ref~n - distance via parent reference</li>
500 * <li>ref@{n} - nth version of ref</li>
501 * <li>ref^{tree} - tree references by ref</li>
502 * <li>ref^{commit} - commit references by ref</li>
507 * <li>timestamps in reflogs, ref@{full or relative timestamp}</li>
508 * <li>abbreviated SHA-1's</li>
511 * @param revstr A git object references expression
512 * @return an ObjectId
513 * @throws IOException on serious errors
515 public ObjectId
resolve(final String revstr
) throws IOException
{
516 char[] rev
= revstr
.toCharArray();
518 ObjectId refId
= null;
519 for (int i
= 0; i
< rev
.length
; ++i
) {
523 String refstr
= new String(rev
,0,i
);
524 refId
= resolveSimple(refstr
);
528 if (i
+ 1 < rev
.length
) {
529 switch (rev
[i
+ 1]) {
541 ref
= mapObject(refId
, null);
542 if (!(ref
instanceof Commit
))
543 throw new IncorrectObjectTypeException(refId
, Constants
.TYPE_COMMIT
);
544 for (j
=i
+1; j
<rev
.length
; ++j
) {
545 if (!Character
.isDigit(rev
[j
]))
548 String parentnum
= new String(rev
, i
+1, j
-i
-1);
549 int pnum
= Integer
.parseInt(parentnum
);
551 refId
= ((Commit
)ref
).getParentIds()[pnum
- 1];
557 for (k
=i
+2; k
<rev
.length
; ++k
) {
559 item
= new String(rev
, i
+2, k
-i
-2);
565 if (item
.equals("tree")) {
566 ref
= mapObject(refId
, null);
567 while (ref
instanceof Tag
) {
569 refId
= t
.getObjId();
570 ref
= mapObject(refId
, null);
572 if (ref
instanceof Treeish
)
573 refId
= ((Treeish
)ref
).getTreeId();
575 throw new IncorrectObjectTypeException(refId
, Constants
.TYPE_TREE
);
577 else if (item
.equals("commit")) {
578 ref
= mapObject(refId
, null);
579 while (ref
instanceof Tag
) {
581 refId
= t
.getObjId();
582 ref
= mapObject(refId
, null);
584 if (!(ref
instanceof Commit
))
585 throw new IncorrectObjectTypeException(refId
, Constants
.TYPE_COMMIT
);
587 else if (item
.equals("blob")) {
588 ref
= mapObject(refId
, null);
589 while (ref
instanceof Tag
) {
591 refId
= t
.getObjId();
592 ref
= mapObject(refId
, null);
594 if (!(ref
instanceof byte[]))
595 throw new IncorrectObjectTypeException(refId
, Constants
.TYPE_COMMIT
);
597 else if (item
.equals("")) {
598 ref
= mapObject(refId
, null);
599 if (ref
instanceof Tag
)
600 refId
= ((Tag
)ref
).getObjId();
606 throw new RevisionSyntaxException(revstr
);
608 throw new RevisionSyntaxException(revstr
);
611 ref
= mapObject(refId
, null);
612 if (ref
instanceof Commit
)
613 refId
= ((Commit
)ref
).getParentIds()[0];
615 throw new IncorrectObjectTypeException(refId
, Constants
.TYPE_COMMIT
);
619 ref
= mapObject(refId
, null);
620 if (ref
instanceof Commit
)
621 refId
= ((Commit
)ref
).getParentIds()[0];
623 throw new IncorrectObjectTypeException(refId
, Constants
.TYPE_COMMIT
);
628 String refstr
= new String(rev
,0,i
);
629 refId
= resolveSimple(refstr
);
630 ref
= mapCommit(refId
);
633 for (l
= i
+ 1; l
< rev
.length
; ++l
) {
634 if (!Character
.isDigit(rev
[l
]))
637 String distnum
= new String(rev
, i
+1, l
-i
-1);
638 int dist
= Integer
.parseInt(distnum
);
640 refId
= ((Commit
)ref
).getParentIds()[0];
641 ref
= mapCommit(refId
);
649 for (m
=i
+2; m
<rev
.length
; ++m
) {
651 time
= new String(rev
, i
+2, m
-i
-2);
656 throw new RevisionSyntaxException("reflogs not yet supported by revision parser yet", revstr
);
661 throw new RevisionSyntaxException(revstr
);
665 refId
= resolveSimple(revstr
);
669 private ObjectId
resolveSimple(final String revstr
) throws IOException
{
670 if (ObjectId
.isId(revstr
))
671 return ObjectId
.fromString(revstr
);
672 final Ref r
= readRef(revstr
, false);
674 return r
.getObjectId();
680 * Close all resources used by this repository
682 public void close() {
687 for (int k
= packs
.length
- 1; k
>= 0; k
--) {
690 packs
= new PackFile
[0];
694 * Add a single existing pack to the list of available pack files.
697 * path of the pack file to open.
699 * path of the corresponding index file.
700 * @throws IOException
701 * index file could not be opened, read, or is not recognized as
702 * a Git pack file index.
704 public void openPack(final File pack
, final File idx
) throws IOException
{
705 final String p
= pack
.getName();
706 final String i
= idx
.getName();
707 if (p
.length() != 50 || !p
.startsWith("pack-") || !p
.endsWith(".pack"))
708 throw new IllegalArgumentException("Not a valid pack " + pack
);
709 if (i
.length() != 49 || !i
.startsWith("pack-") || !i
.endsWith(".idx"))
710 throw new IllegalArgumentException("Not a valid pack " + idx
);
711 if (!p
.substring(0,45).equals(i
.substring(0,45)))
712 throw new IllegalArgumentException("Pack " + pack
713 + "does not match index " + idx
);
715 final PackFile
[] cur
= packs
;
716 final PackFile
[] arr
= new PackFile
[cur
.length
+ 1];
717 System
.arraycopy(cur
, 0, arr
, 1, cur
.length
);
718 arr
[0] = new PackFile(this, idx
, pack
);
723 * Scan the object dirs, including alternates for packs
726 public void scanForPacks() {
727 final ArrayList
<PackFile
> p
= new ArrayList
<PackFile
>();
728 for (int i
=0; i
<objectsDirs
.length
; ++i
)
729 scanForPacks(new File(objectsDirs
[i
], "pack"), p
);
730 final PackFile
[] arr
= new PackFile
[p
.size()];
735 private void scanForPacks(final File packDir
, Collection
<PackFile
> packList
) {
736 final String
[] idxList
= packDir
.list(new FilenameFilter() {
737 public boolean accept(final File baseDir
, final String n
) {
738 // Must match "pack-[0-9a-f]{40}.idx" to be an index.
739 return n
.length() == 49 && n
.endsWith(".idx")
740 && n
.startsWith("pack-");
743 if (idxList
!= null) {
744 for (final String indexName
: idxList
) {
745 final String n
= indexName
.substring(0, indexName
.length() - 4);
746 final File idxFile
= new File(packDir
, n
+ ".idx");
747 final File packFile
= new File(packDir
, n
+ ".pack");
749 packList
.add(new PackFile(this, idxFile
, packFile
));
750 } catch (IOException ioe
) {
751 // Whoops. That's not a pack!
753 ioe
.printStackTrace();
760 * Writes a symref (e.g. HEAD) to disk
762 * @param name symref name
763 * @param target pointed to ref
764 * @throws IOException
766 public void writeSymref(final String name
, final String target
)
768 final byte[] content
= ("ref: " + target
+ "\n").getBytes("UTF-8");
769 final LockFile lck
= new LockFile(fileForRef(name
));
771 throw new ObjectWritingException("Unable to lock " + name
);
774 } catch (IOException ioe
) {
775 throw new ObjectWritingException("Unable to write " + name
, ioe
);
778 throw new ObjectWritingException("Unable to write " + name
);
781 private Ref
readRef(final String revstr
, final boolean missingOk
)
783 refreshPackedRefsCache();
784 for (int k
= 0; k
< refSearchPaths
.length
; k
++) {
785 final Ref r
= readRefBasic(refSearchPaths
[k
] + revstr
);
786 if (missingOk
|| r
.getObjectId() != null) {
793 private Ref
readRefBasic(String name
) throws IOException
{
796 // prefer unpacked ref to packed ref
797 final File f
= fileForRef(name
);
799 // look for packed ref, since this one doesn't exist
800 ObjectId id
= packedRefs
.get(name
);
802 return new Ref(name
, id
);
804 // no packed ref found, return blank one
805 return new Ref(name
, null);
808 final BufferedReader br
= new BufferedReader(new FileReader(f
));
810 final String line
= br
.readLine();
811 if (line
== null || line
.length() == 0)
812 return new Ref(name
, null);
813 else if (line
.startsWith("ref: ")) {
814 name
= line
.substring("ref: ".length());
815 continue REF_READING
;
816 } else if (ObjectId
.isId(line
))
817 return new Ref(name
, ObjectId
.fromString(line
));
818 throw new IOException("Not a ref: " + name
+ ": " + line
);
822 } while (depth
++ < 5);
823 throw new IOException("Exceed maximum ref depth. Circular reference?");
826 private File
fileForRef(final String name
) {
827 if (name
.startsWith("refs/"))
828 return new File(refsDir
, name
.substring("refs/".length()));
829 return new File(gitDir
, name
);
832 public String
toString() {
833 return "Repository[" + getDirectory() + "]";
837 * @return name of topmost Stacked Git patch.
838 * @throws IOException
840 public String
getPatch() throws IOException
{
841 final File ptr
= new File(getDirectory(),"patches/"+getBranch()+"/applied");
842 final BufferedReader br
= new BufferedReader(new FileReader(ptr
));
846 while ((line
=br
.readLine())!=null) {
856 * @return name of current branch
857 * @throws IOException
859 public String
getFullBranch() throws IOException
{
860 final File ptr
= new File(getDirectory(),"HEAD");
861 final BufferedReader br
= new BufferedReader(new FileReader(ptr
));
868 if (ref
.startsWith("ref: "))
869 ref
= ref
.substring(5);
874 * @return name of current branch.
875 * @throws IOException
877 public String
getBranch() throws IOException
{
879 final File ptr
= new File(getDirectory(),"HEAD");
880 final BufferedReader br
= new BufferedReader(new FileReader(ptr
));
887 if (ref
.startsWith("ref: "))
888 ref
= ref
.substring(5);
889 if (ref
.startsWith("refs/heads/"))
890 ref
= ref
.substring(11);
892 } catch (FileNotFoundException e
) {
893 final File ptr
= new File(getDirectory(),"head-name");
894 final BufferedReader br
= new BufferedReader(new FileReader(ptr
));
906 * @return names of all local branches
908 public Collection
<String
> getBranches() {
909 return listRefs("heads");
913 * @return the names of all refs (local and remotes branches, tags)
915 public Collection
<String
> getAllRefs() {
919 private Collection
<String
> listRefs(String refSubDir
) {
920 // add / to end, unless empty
921 if (refSubDir
.length() > 0 && refSubDir
.charAt(refSubDir
.length() -1 ) != '/')
924 Collection
<String
> branchesRaw
= listFilesRecursively(new File(refsDir
, refSubDir
), null);
925 ArrayList
<String
> branches
= new ArrayList
<String
>();
926 for (String b
: branchesRaw
) {
927 branches
.add("refs/" + refSubDir
+ b
);
930 refreshPackedRefsCache();
931 Set
<String
> keySet
= packedRefs
.keySet();
932 for (String s
: keySet
)
933 if (s
.startsWith("refs/" + refSubDir
) && !branches
.contains(s
))
939 * @return all git tags
941 public Collection
<String
> getTags() {
942 return listRefs("tags");
945 private Map
<String
,ObjectId
> packedRefs
= new HashMap
<String
,ObjectId
>();
946 private long packedrefstime
= 0;
948 private void refreshPackedRefsCache() {
949 if (!packedRefsFile
.exists()) {
950 if (packedRefs
.size() > 0)
951 packedRefs
= new HashMap
<String
,ObjectId
>();
954 if (packedRefsFile
.lastModified() == packedrefstime
)
956 Map
<String
,ObjectId
> newPackedRefs
= new HashMap
<String
,ObjectId
>();
957 FileReader fileReader
= null;
959 fileReader
= new FileReader(packedRefsFile
);
960 BufferedReader b
=new BufferedReader(fileReader
);
962 while ((p
= b
.readLine()) != null) {
963 if (p
.charAt(0) == '#')
965 if (p
.charAt(0) == '^') {
968 int spos
= p
.indexOf(' ');
969 ObjectId id
= ObjectId
.fromString(p
.substring(0,spos
));
970 String name
= p
.substring(spos
+1);
971 newPackedRefs
.put(name
, id
);
973 } catch (IOException e
) {
974 throw new Error("Cannot read packed refs",e
);
976 if (fileReader
!= null) {
979 } catch (IOException e
) {
980 // Cannot do anything more here
985 packedRefs
= newPackedRefs
;
989 * @return true if HEAD points to a StGit patch.
991 public boolean isStGitMode() {
993 File file
= new File(getDirectory(), "HEAD");
994 BufferedReader reader
= new BufferedReader(new FileReader(file
));
995 String string
= reader
.readLine();
996 if (!string
.startsWith("ref: refs/heads/"))
998 String branch
= string
.substring("ref: refs/heads/".length());
999 File currentPatches
= new File(new File(new File(getDirectory(),
1000 "patches"), branch
), "applied");
1001 if (!currentPatches
.exists())
1003 if (currentPatches
.length() == 0)
1007 } catch (IOException e
) {
1008 e
.printStackTrace();
1014 * @return applied patches in a map indexed on current commit id
1015 * @throws IOException
1017 public Map
<ObjectId
,StGitPatch
> getAppliedPatches() throws IOException
{
1018 Map
<ObjectId
,StGitPatch
> ret
= new HashMap
<ObjectId
,StGitPatch
>();
1019 if (isStGitMode()) {
1020 File patchDir
= new File(new File(getDirectory(),"patches"),getBranch());
1021 BufferedReader apr
= new BufferedReader(new FileReader(new File(patchDir
,"applied")));
1022 for (String patchName
=apr
.readLine(); patchName
!=null; patchName
=apr
.readLine()) {
1023 File topFile
= new File(new File(new File(patchDir
,"patches"), patchName
), "top");
1024 BufferedReader tfr
= new BufferedReader(new FileReader(topFile
));
1025 String objectId
= tfr
.readLine();
1026 ObjectId id
= ObjectId
.fromString(objectId
);
1027 ret
.put(id
, new StGitPatch(patchName
, id
));
1035 private Collection
<String
> listFilesRecursively(File root
, File start
) {
1038 Collection
<String
> ret
= new ArrayList
<String
>();
1039 File
[] files
= start
.listFiles();
1040 for (int i
= 0; i
< files
.length
; ++i
) {
1041 if (files
[i
].isDirectory())
1042 ret
.addAll(listFilesRecursively(root
, files
[i
]));
1043 else if (files
[i
].length() == 41) {
1044 String name
= files
[i
].toString().substring(
1045 root
.toString().length() + 1);
1046 if (File
.separatorChar
!= '/')
1047 name
= name
.replace(File
.separatorChar
, '/');
1054 /** Clean up stale caches */
1055 public void refreshFromDisk() {
1060 * @return a representation of the index associated with this repo
1061 * @throws IOException
1063 public GitIndex
getIndex() throws IOException
{
1064 if (index
== null) {
1065 index
= new GitIndex(this);
1068 index
.rereadIfNecessary();
1073 static byte[] gitInternalSlash(byte[] bytes
) {
1074 if (File
.separatorChar
== '/')
1076 for (int i
=0; i
<bytes
.length
; ++i
)
1077 if (bytes
[i
] == File
.separatorChar
)
1083 * @return an important state
1085 public RepositoryState
getRepositoryState() {
1086 if (new File(getWorkDir(), ".dotest").exists())
1087 return RepositoryState
.REBASING
;
1088 if (new File(gitDir
,".dotest-merge").exists())
1089 return RepositoryState
.REBASING_INTERACTIVE
;
1090 if (new File(gitDir
,"MERGE_HEAD").exists())
1091 return RepositoryState
.MERGING
;
1092 if (new File(gitDir
,"BISECT_LOG").exists())
1093 return RepositoryState
.BISECTING
;
1094 return RepositoryState
.SAFE
;
1098 * Check validty of a ref name. It must not contain character that has
1099 * a special meaning in a Git object reference expression. Some other
1100 * dangerous characters are also excluded.
1104 * @return true if refName is a valid ref name
1106 public static boolean isValidRefName(final String refName
) {
1107 final int len
= refName
.length();
1109 for (int i
=0; i
<len
; ++i
) {
1110 char c
= refName
.charAt(i
);
1128 case '~': case '^': case ':':
1140 * String work dir and return normalized repository path
1142 * @param wd Work dir
1143 * @param f File whose path shall be stripp off it's workdir
1144 * @return normalized repository relative path
1146 public static String
stripWorkDir(File wd
, File f
) {
1147 String relName
= f
.getPath().substring(wd
.getPath().length() + 1);
1148 relName
= relName
.replace(File
.separatorChar
, '/');
1154 * The "remote" name in this repo
1155 * @return information about how a remote repository is beging tracked
1157 public RemoteSpec
getRemoteSpec(String name
) {
1158 String url
= getConfig().getString("remote."+name
, null, "url");
1159 String fetchPattern
= getConfig().getString("remote."+name
, null, "fetch");
1160 String pushPattern
= getConfig().getString("remote."+name
, null, "push");
1161 return new RemoteSpec(name
, url
, fetchPattern
, pushPattern
);
1165 * Setup repository configuration for a new remote
1168 * remote name, e.g. "origin"
1170 * fetch url, e.g. "git://repo.or.cz/egit.git"
1172 * local branch name, e.g. "master"
1174 public void configureDefaultBranch(final String remote
, final String url
, final String branch
) {
1175 config
.setString(RepositoryConfig
.REMOTE_SECTION
, remote
, "url",
1177 config
.setString(RepositoryConfig
.REMOTE_SECTION
, remote
, "fetch",
1178 "+" + Constants
.HEADS_PREFIX
+ "/*:" + Constants
.REMOTES_PREFIX
+ "/" + remote
+ "/*");
1179 config
.setString(RepositoryConfig
.BRANCH_SECTION
, branch
, "remote",
1181 config
.setString(RepositoryConfig
.BRANCH_SECTION
, Constants
.MASTER
, "merge",
1182 Constants
.HEADS_PREFIX
+ "/" + branch
);
1186 * @return the workdir file, i.e. where the files are checked out
1188 public File
getWorkDir() {
1189 return getDirectory().getParentFile();
1193 * Setup HEAD and "master" refs for a new repository.
1195 * @param remoteBranch
1196 * The remote branch to start with
1198 * The local branch to configure, initially starting at
1200 * @return the commit references by the new HEAD
1201 * @throws IOException
1203 public Commit
setupHEADRef(final String remoteBranch
, final String branch
) throws IOException
{
1204 Commit mapCommit
= mapCommit(remoteBranch
);
1205 String refName
= Constants
.HEADS_PREFIX
+ "/" + branch
;
1206 LockFile masterRef
= lockRef(refName
);
1208 masterRef
.write(mapCommit
.getCommitId());
1213 writeSymref(Constants
.HEAD
, refName
);