Simple diff question

Lawson English

Very simple question, I hope. If I have two files or source trees, and I
want to have a count of the number of lines of code that have changed
from one to the next version, what is the command string to obtain this
info using diff? Or should I be using another utility instead?

Thanks


Lawson English

elsiddik

On Nov 2, 10:01 pm, Lawson English <> wrote:
> Very simple question, I hope. If I have two files or source trees, and I
> want to have a count of the number of lines of code that have changed
> from one to the next version, what is the command string to obtain this
> info using diff? Or should I be using another utility instead?
>
> Thanks
>
> Lawson English

I dont think you can do that .
you can only use diff as a a tool to compare files that are different.
you can always use nl command to count lines, both command on the same
line <could> give you the result that your looking for but im afriad
it would be very annoying outprint if you have a big file.
i would suggest you write a perl script to do so.


cheers,

zaher el siddik

kkzhou

I think command wc is better:
wc -l filename
but I don't know how to recursively deal with a directory

"elsiddik" <>
??????:1194192898.749934.212540@o38g2000hse.google groups.com...
> On Nov 2, 10:01 pm, Lawson English <> wrote:
>> Very simple question, I hope. If I have two files or source trees, and I
>> want to have a count of the number of lines of code that have changed
>> from one to the next version, what is the command string to obtain this
>> info using diff? Or should I be using another utility instead?
>>
>> Thanks
>>
>> Lawson English
>
> I dont think you can do that .
> you can only use diff as a a tool to compare files that are different.
> you can always use nl command to count lines, both command on the same
> line <could> give you the result that your looking for but im afriad
> it would be very annoying outprint if you have a big file.
> i would suggest you write a perl script to do so.
>
>
> cheers,
>
> zaher el siddik
>
>
>
>

Ed Morton

On 11/2/2007 4:01 PM, Lawson English wrote:
> Very simple question, I hope. If I have two files or source trees, and I
> want to have a count of the number of lines of code that have changed
> from one to the next version, what is the command string to obtain this
> info using diff? Or should I be using another utility instead?

Are you looking for differences between the 2 files of source trees, or
differences between the files listed in the 2 files of source trees?

How do you define a "changed line"? Diff reports every "change" as "added"
and/or "deleted" lines:

$ cat file1
a b c
d e f
g h i

$ cat file2
a b c
d x f
g h i

$ diff file1 file2
2c2
< d e f
---
> d x f

I don't know of any utility that can distinguish those cases where you changed
something within a line from those cases where you deleted a line and then later
inserted a different but possibly similair line. Do you just want the count of
added lines, or both added and deleted separately or something else?

Regards,

Ed.