mygit

My git command that implements the Myer algorithm.

Limitations

• The tool only supports version control of individual files
• The tool only supports linear version control. That is to say, if you fork from a previous version of the file, the recent versions will lose.

Setup

Add the current path to the environment variable

. ./setupenv.sh

Command options

Display the difference of the file to the current record

mygit diff <file>

Add the changes of the file to the records

mygit add <file>

Display all versions of the file

mygit log <file>

Roll to the previous version of the file

mygit rollback <file>

Roll to the next version of the file

mygit rollnext <file>

Move to certain version of a file. Default is the current version

mygit checkout <file>

Example

I add the fib.py to my directory

% mygit add fib.py 

The every new file, the mygit creates the version control files in .mygit directory

% ls .pygit 
fib.py

The mygit log command shows the changes to the files, and the current version of the files.

% mygit log fib.py    

Version #: 1
+ def fib(n):
+   if(n<2):
+     return 1
+   return fib(n-1)+fib(n-2)

Current version: 1

Make change to the fib.py. The mygit diff shows the changes made to this file. The + denotes the lines added, the - denotes the lines removed.

% mygit diff fib.py              
+ def fib(n,cache):
+   if(n in cache):
+     return cache[n]
- def fib(n):
+   cache[n]= fib(n-1,cache)+fib(n-2,cache)
+   return cache[n]
-   return fib(n-1)+fib(n-2)

After adding the file using mygit add, you can read the updates using mygit log command

% mygit add fib.py 
% mygit log fib.py    

Version #: 1
+ def fib(n):
+   if(n<2):
+     return 1
+   return fib(n-1)+fib(n-2)

Version #: 2
+ def fib(n,cache):
+   if(n in cache):
+     return cache[n]
- def fib(n):
+   cache[n]= fib(n-1,cache)+fib(n-2,cache)
+   return cache[n]
-   return fib(n-1)+fib(n-2)

Current version: 2