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Mercurial for Kittens
- 1. Mercurial for Kittens Shuhei Takahashi<takahashi.shuhei@gmail.com>
- 2. Mercurial
- 3. Features Simple design Decentralized system High performance Extensible framework
- 4. Outline History model Basic operations
- 6. Checking out Mercurial repo $ hg clone http://example.com/hg example updating to branch default 3 files updated, 0 files merged, 0 files removed, 0 files unresolved $ ls -lA example/ drwxr-xr-x 3 nya nya 4096 2011-05-22 20:59 .hg -rw-r--r-- 1 nya nya 14 2011-05-22 20:59 README drwxr-xr-x 2 nya nya 4096 2011-05-22 20:59 src
- 7. Standard Mercurial repo example/ .hg/ README src/ a.cc a.h Repository Working copy
- 8. Standard Mercurial repo example/ .hg/ hgrc dirstate store/ ... repo-local config working copy state history
- 9. History .hg/ Merge X Improve X diff -r 000000... -r 39fca2... README --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/README Sun May 22 20:59:40 2011 +0900 @@ -0,0 +1,1 @@ +Hello, world! Implemented X Implementing X Bugfix First commit
- 10. Commit nodeid: 9e66e5ae2b... rev: 42 branch: featureX author: "Shuhei Takahashi <nya@example.com>" timestamp: 2011-06-02 11:59:28 +0900 implement feature X. (patch...) p1: 48334cb9e1... p2: 0000000000...
- 11. nodeid .hg/ bcd055... 8a9310... SHA-1 hash Made from whole commit information 384fca... a87493... 048293... 4fcf85...
- 13. null = 000000...p1 p1 p1
- 15. no consistency between repos
- 16. just for convenience!2 1 3 0
- 18. all commitshave their branch name(c.f. git)featureX featureX default default
- 19. Notes for Git users Different concept of branches All commits have their branch name No reachability check hg log shows all commits Commits cannot be amended or erased (usually)
- 20. Commit nodeid: 9e66e5ae2b... rev: 42 branch: default author: "Shuhei Takahashi <nya@example.com>" timestamp: 2011-06-02 11:59:28 +0900 implement feature X. (patch...) p1: 48334cb9e1... p2: 0000000000...
- 21. Referring commits rev nodeid branch name... commit in the branch with the largest rev "tip" ... commit in any branch with the largest rev "null" ... root commit tag
- 22. Referring commits .hg/ 4 5 3 tip default featureX 2 featureX 1 3 default 0
- 23. Basic operations
- 24. Check out a revision .hg/ 4 5 Working Copy 2 1 3 $ hg update 3 0
- 25. Making commit Working Copy .hg/ $ hg add hoge.txt ... edit working copy ...
- 26. Making commit Working Copy .hg/ $ hg commit
- 27. Making branch Working Copy .hg/ default featureX default $ hg update default featureX featureX default default
- 28. Making branch Working Copy .hg/ release featureX default $ hg branch release featureX featureX default default
- 29. Making branch Working Copy .hg/ release $ hg commit featureX default featureX featureX default default
- 30. Pull hg pull local remote
- 31. Push hg push local remote
- 32. Pull / Push Just makes union of two history graphs Merge operation is never performed(c.f. Git) Can specify subgraph by a list of heads
- 33. Merge - "healthy" branch One head per branches featureX default
- 34. Merge - "unhealthy" branch "default" branch has two heads - multiple heads Branch tip varies by rev order! Push that will end up with multiple heads is rejected ? ? default
- 35. Merge Checked out rev. 1 Pulled rev. 2, 3, resulting multiple heads (1, 3) 3 1 2 default 0
- 36. Merge hg merge 3 Working copy now has two parents (1, 3) Not yet committed! hg merge is forbidden if WC has pending changes p2 p1 3 1 2 default 0
- 37. Merge hg commit 4 p2 p1 3 1 2 default 0
- 38. More fun stuff hgweb.cgi Extensions Mercurial queue (MQ) Rebase ... Hooks Mercurial as a Python module
- 39. References Mercurial: The Definitive Guide Chapter 4. Behind the scenes google:///hgbook or available from O'reilly