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Author

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1		-XWiki.msp
	1	+XWiki.cds

Content

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1		-This tutorial will address the source code management (SCM) tool named [[Git>>url:http://git-scm.com/||shape="rect"]]. By following these steps you should learn about the basic usage of Git, which is required for the whole practical course. Furthermore, Git is a great SCM tool, and it's good to know how to use it. During this tutorial, we will follow Alan Turing's thoughts towards developing the [[Turing Machine>>url:http://en.wikipedia.org/wiki/Turing_machine||shape="rect"]].
	1	+This tutorial will address the source code management (SCM) tool named [[Git>>url:http://git-scm.com/||shape="rect"]].
2	2
3		- More in-depth documentation can be found on the [[official home page>>url:http://git-scm.com/documentation||shape="rect"]], which mentions books, videos, and links to other tutorials and references.
	3	+= Repositories and Commits =
4	4
5		-= Creating Commits =
	5	+{{task-list}}
	6	+{{task id="1" status="complete"}}
	7	+test1
	8	+{{/task}}
6	6
7		-1. Read the [[Git for Computer Scientists>>url:http://eagain.net/articles/git-for-computer-scientists/||shape="rect"]] introduction (skip this if you are already familiar with Git).
8		-1. For Linux, Git is available in its own package. Windows users can install [[msysGit>>url:http://msysgit.github.com/||shape="rect"]]. For MacOS, Git is available as part of [[Xcode>>url:https://developer.apple.com/xcode/||shape="rect"]]; if you cannot install that, use [[Git for OSX>>url:http://code.google.com/p/git-osx-installer/||shape="rect"]].
9		-1. (((
10		-Create a local repository for the "//Turing Project//":
	10	+{{task id="2" status="incomplete"}}
	11	+test2
	12	+{{/task}}
11	11
12		-{{noformat}}
13		-$ mkdir turing
14		-$ cd turing
15		-$ git init
16		-Initialized empty Git repository in ~/turing/.git/
17		-{{/noformat}}
18		-)))
19		-1. (((
20		-Add some content: copy [[attach:notes.txt]]{{code language="none"}}{{/code}} to your {{code language="none"}}turing{{/code}} directory.
	14	+{{task id="3" status="incomplete"}}
	15	+test 3
	16	+{{/task}}
	17	+{{/task-list}}
21	21
22		-{{noformat}}
23		-$ git add notes.txt
24		-$ git commit -m "wrote some first notes"
25		-[master (root-commit) 2e73b34] wrote some first notes
26		- 1 files changed, 5 insertions(+), 0 deletions(-)
27		- create mode 100644 notes.txt
28		-{{/noformat}}
29		-)))
30		-1. Edit {{code language="none"}}notes.txt{{/code}}:\\
31		-11. Replace "fixed" with "infinite" in line 1.
32		-11. Replace "... (TODO)" with "a finite state machine" in line 4.
33		-1. (((
34		-Commit the modified content to your local repository:
35		-
36		-{{noformat}}
37		-$ git add notes.txt
38		-$ git commit -m "modified tape length, found a controller for tape head"
39		-[master 3f28a0e] modified tape length, found a controller for tape head
40		- 1 files changed, 2 insertions(+), 2 deletions(-)
41		-{{/noformat}}
42		-)))
43		-
44		-After the preceding steps you have two commits in your local repository, each with one file in the index. You have different commands for viewing these commits:
45		-
46		-{{noformat}}
47		-$ git log
48		-commit 3f28a0e473bf3da4aff34a09fed838fe033f3bb5
49		-Author: Miro Spoenemann <msp@informatik.uni-kiel.de>
50		-Date: Mon Oct 15 14:30:24 2012 +0200
51		-
52		- modified tape length, found a controller for tape head
53		-
54		-commit 2e73b34ac44480773fc0e52875b7353a087d8c6d
55		-Author: Miro Spoenemann <msp@informatik.uni-kiel.de>
56		-Date: Mon Oct 15 12:14:06 2012 +0200
57		-
58		- wrote some first notes
59		-
60		-$ git show 3f28a0e
61		-commit 3f28a0e473bf3da4aff34a09fed838fe033f3bb5
62		-Author: Miro Spoenemann <msp@informatik.uni-kiel.de>
63		-Date: Mon Oct 15 14:30:24 2012 +0200
64		-
65		- modified tape length, found a controller for tape head
66		-
67		-diff --git a/notes.txt b/notes.txt
68		-index 4ded2b3..bd422b3 100644
69		---- a/notes.txt
70		-+++ b/notes.txt
71		-@@ -1,5 +1,5 @@
72		-- * A tape with fixed length
73		-+ * A tape with infinite length
74		- * Tape head can read or write data
75		- * Tape head can move left or right
76		-- * The head is controlled by ... (TODO)
77		-+ * The head is controlled by a finite state machine
78		-{{/noformat}}
79		-
80		-Note that each commit is identified by a looong hash value, but it is possible to use only a prefix when referencing them (if the prefix is not ambiguous): the example above uses {{code language="none"}}3f28a0e{{/code}} to identify the second commit. Also try the command {{code language="none"}}gitk{{/code}} to get an overview of your commits (a better alternative available for MacOS is [[GitX>>url:http://gitx.frim.nl/||shape="rect"]]).
	19	+\\

Confluence.Code.ConfluencePageClass[0]

Id

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1		-2982120
	1	+2982103

URL

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1		-https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/WS12EclPract/pages/2982120/Git
	1	+https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/WS12EclPract/pages/2982103/Git