Mercurial > hg4j

annotate design.txt @ 18:02ee376bee79

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
status operation against current working directory
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 03 Jan 2011 20:42:52 +0100
parents 571e1b2cc3f7
children 11cfabe692b3
rev   line source
1
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
1 FileStructureWalker (pass HgFile, HgFolder to callable; which can ask for VCS data from any file)
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
2 External uses: user browses files, selects one and asks for its history
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
3 Params: tip/revision;
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
4 Implementation: manifest
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
5
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
6 Log --rev
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
7 Log <file>
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
8 HgDataFile.history() or Changelog.history(file)?
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
9
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
10
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
11 Changelog.all() to return list with placeholder, not-parsed elements (i.e. read only compressedLen field and skip to next record), so that
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
12 total number of elements in the list is correct
1
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
13
a3576694a4d1 Repository detection from local/specified directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
14 hg cat
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
15 Implementation: logic to find file by name in the repository is the same with Log and other commands
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
16
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
17
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 1
diff changeset
18 Revlog
4
aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
19 What happens when big entry is added to a file - when it detects it can't longer fit into .i and needs .d? Inline flag and .i format changes?
aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
20
aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
21
aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
22 ----------
6
5abe5af181bd Ant script to build commands and run sample
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
23 + support patch from baseRev + few deltas (although done in a way patches are applied one by one instead of accumulated)
4
aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
24 + command-line samples (-R, filenames) (Log & Cat) to show on any repo
6
5abe5af181bd Ant script to build commands and run sample
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
25 +buildfile + run samples
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
26 *input stream impl + lifecycle. Step forward with FileChannel and ByteBuffer, although questionable accomplishment (looks bit complicated, cumbersome)
14
442dc6ee647b Show correct time
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 11
diff changeset
27 + dirstate.mtime
18
02ee376bee79 status operation against current working directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 17
diff changeset
28 +calculate sha1 digest for file to see I can deal with nodeid
02ee376bee79 status operation against current working directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 17
diff changeset
29 *.hgignored processing
4
aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
30
11
d46773d89a19 Boundary error in dirstate entry, explicit encoding to face troubles (if any) asap.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 9
diff changeset
31 DataAccess - collect debug info (buffer misses, file size/total read operations) to find out better strategy to buffer size detection.
4
aa1912c70b36 Fix offset issue for inline revlogs. Commandline processing.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
32 delta merge
6
5abe5af181bd Ant script to build commands and run sample
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
33 Changeset to get index (local revision number)
14
442dc6ee647b Show correct time
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 11
diff changeset
34 RevisionWalker (on manifest) and WorkingCopyWalker (io.File) talking to ? and/or dirstate
17
571e1b2cc3f7 Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 16
diff changeset
35 Revlog.Inspector to get nodeid array of meaningful data exact size (nor heading 00 bytes, nor 12 extra bytes from the spec)
18
02ee376bee79 status operation against current working directory
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 17
diff changeset
36 Status operation from GUI - guess, usually on a file/subfolder, hence API should allow for starting path (unlike cmdline, seems useless to implement include/exclide patterns - GUI users hardly enter them, ever)
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
37
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
38
15
865bf07f381f Basic hgignore handling
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 14
diff changeset
39 ??? encodings of fncache, .hgignore, dirstate
16
254078595653 Print manifest nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 15
diff changeset
40 ??? http://mercurial.selenic.com/wiki/Manifest says "Multiple changesets may refer to the same manifest revision". To me, each changeset
254078595653 Print manifest nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 15
diff changeset
41 changes repository, hence manifest should update nodeids of the files it lists, effectively creating new manifest revision.
15
865bf07f381f Basic hgignore handling
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 14
diff changeset
42
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
43 >>>> Effective file read/data access
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
44 ReadOperation, Revlog does: repo.getFileSystem().run(this.file, new ReadOperation(), long start=0, long end = -1)
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
45 ReadOperation gets buffer (of whatever size, as decided by FS impl), parses it and then reports if needs more data.
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
46 This helps to ensure streams are closed after reading, allows caching (if the same file (or LRU) is read few times in sequence)
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
47 and allows buffer management (i.e. reuse. Single buffer for all reads).
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
48 Scheduling multiple operations (in future, to deal with writes - single queue for FS operations - no locks?)
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
49
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
50 File access:
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
51 * NIO and mapped files - should be fast. Although seems to give less control on mem usage.
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
52 * Regular InputStreams and chunked stream on top - allocate List<byte[]>, each (but last) chunk of fixed size (depending on initial file size)
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
53
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
54 <<<<<