Re: [CentOS] yum/dnf diff

[Peter]

On 6/06/20 7:34 am, Kenneth Porter wrote:
That's quite handy! But not what I'm looking for. I'm trying to figure 
out what edits I made to my config files.


Just mv those files that you changed (as shown by rpm -V packagename) 
and yum reinstall the package, then you can diff the original files to 
the ones you moved.



Peter
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Re: [CentOS] yum/dnf diff

[Kenneth Porter]

--On Monday, June 08, 2020 5:00 PM +0100 Paddy Doyle  
wrote:



It won't track /var/named/* though.


I love etckeeper enough that I started keeping /var/named under git, as 
well.


I do disable etckeeper's nightly commit as I don't want it combining 
unrelated changes into a single commit if I forget to commit. I have it set 
to block updates if there's an uncommitted change so I'll fix things when 
that happens.


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Re: [CentOS] yum/dnf diff

[Paddy Doyle]

On Mon, Jun 08, 2020 at 04:00:31PM +0100, Paddy Doyle wrote:

> Just to mention that 'etckeeper' from EPEL is a great way of tracking

Ah, I see you mentioned you were using that already in the original post.

Sorry for the noise.

Paddy
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Re: [CentOS] yum/dnf diff

[Paddy Doyle]

On Fri, Jun 05, 2020 at 12:34:07PM -0700, Kenneth Porter wrote:

> I'm trying to figure out
> what edits I made to my config files.
> 
> My most recent case was trying to figure out what I'd done to my BIND files
> (/etc/named.*, /etc/logrotate.d/named, /var/named/*). I ended up just
> tarring them up and erasing and re-installing the bind package, then
> untarring my old config into a tmp directory and diffing the files
> individually, reapplying appropriate changes.

Just to mention that 'etckeeper' from EPEL is a great way of tracking
changes in /etc. It interfaces nicely with yum, such that installing a
package means that it will commit changes to the /etc repo. And there's a
daily crontab that commits changes. You can manually commit changes as
well. Then you can 'git log -p' to see what changes were made to the file
over time.

It won't track /var/named/* though.

Paddy

-- 
Paddy Doyle
Research IT / Trinity Centre for High Performance Computing,
Lloyd Building, Trinity College Dublin, Dublin 2, Ireland.
Phone: +353-1-896-3725
https://www.tchpc.tcd.ie/
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Re: [CentOS] yum/dnf diff

[Johnny Hughes]

On 6/5/20 4:31 PM, Kenneth Porter wrote:
> --On Friday, June 05, 2020 1:39 PM -0700 John Pierce
>  wrote:
> 
>> don't most packages create a .rpmnew file if you've modified the previous
>> package file ?
> 
> That file is created AFTER you've made edits, and reflects only the
> state of the file in the latest package. So it's not clear what changed
> from the original package that needs to be migrated into one's current
> settings.
> 
> As a rule I try to copy the original files to xxx.original so I can
> compare that to both the .rpmnew file and my working file. But I or
> another admin might forget to save the original. So I end up going the
> cpio route to extract the original files to a temp tree to do the 3-way
> comparison between the original, my modifications, and the latest
> package's modifications.

Do your mods in a local git repo .. if you mod the exploded tarball, do
it via a spec patch.

If you mod config files .. create a separate branch from the rpm and put
the mods in (if you can't do it via a spec patch).

Then when new files come in .. just reapply (or refactor if necessary)
the original diff.  That is exactly what we do for packages we modify ..
look at Firefox as an example:

https://git.centos.org/rpms/firefox/commits/c7



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Re: [CentOS] yum/dnf diff

[Simon Matter via CentOS]

> --On Friday, June 05, 2020 1:39 PM -0700 John Pierce
> 
> wrote:
>
>> don't most packages create a .rpmnew file if you've modified the
>> previous
>> package file ?
>
> That file is created AFTER you've made edits, and reflects only the state
> of the file in the latest package. So it's not clear what changed from the
> original package that needs to be migrated into one's current settings.
>
> As a rule I try to copy the original files to xxx.original so I can
> compare
> that to both the .rpmnew file and my working file. But I or another admin
> might forget to save the original. So I end up going the cpio route to
> extract the original files to a temp tree to do the 3-way comparison
> between the original, my modifications, and the latest package's
> modifications.

I do something similar. Before editing any config file, I create a copy of
it named xxx.orig. If I once forgot to do it in time, I have a helper
script 'mkorig [file]' which extracts the file from the corresponding RPM.
Now when doing upgrades with our package managing tool, this will upgrade
using YUM/DNF and after this it's merging all config files. This goes well
in ~95% of the cases. For the cases where merging wasn't possible, it
produces the .rej files so one can merge by hand.

Simon

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Re: [CentOS] yum/dnf diff

[Leon Fauster via CentOS]

Am 05.06.20 um 23:31 schrieb Kenneth Porter:
--On Friday, June 05, 2020 1:39 PM -0700 John Pierce 
 wrote:



don't most packages create a .rpmnew file if you've modified the previous
package file ?


That file is created AFTER you've made edits, and reflects only the 
state of the file in the latest package. So it's not clear what changed 
from the original package that needs to be migrated into one's current 
settings.


As a rule I try to copy the original files to xxx.original so I can 
compare that to both the .rpmnew file and my working file. But I or 
another admin might forget to save the original. So I end up going the 
cpio route to extract the original files to a temp tree to do the 3-way 
comparison between the original, my modifications, and the latest 
package's modifications.




Your needs are very specific. So, I think you need to write a custom 
script for that.


What we do here is, packaging the custom configuration files (rpm).
The source package (srpm) has also the original or distribution
version of the configuration file. Downloading the current original file
in a pre task and patching it while building the rpm helps us to track
the changes ...

--
Leon



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Re: [CentOS] yum/dnf diff

[Kenneth Porter]

--On Friday, June 05, 2020 1:39 PM -0700 John Pierce  
wrote:



don't most packages create a .rpmnew file if you've modified the previous
package file ?


That file is created AFTER you've made edits, and reflects only the state 
of the file in the latest package. So it's not clear what changed from the 
original package that needs to be migrated into one's current settings.


As a rule I try to copy the original files to xxx.original so I can compare 
that to both the .rpmnew file and my working file. But I or another admin 
might forget to save the original. So I end up going the cpio route to 
extract the original files to a temp tree to do the 3-way comparison 
between the original, my modifications, and the latest package's 
modifications.



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Re: [CentOS] yum/dnf diff

[John Pierce]

On Fri, Jun 5, 2020 at 12:35 PM Kenneth Porter 
wrote:

> On 6/5/2020 12:21 PM, Johnny Hughes wrote:
> > if you click on the six digit number, for example, e52775 for the
> > current latest "import 389-ds-base-1.3.10.1-9.el7_8".  The result is
> > every diff of every change for the rpm.
>
> That's quite handy! But not what I'm looking for. I'm trying to figure
> out what edits I made to my config files.
>
>
>
don't most packages create a .rpmnew file if you've modified the previous
package file ?


-- 
-john r pierce
  recycling used bits in santa cruz
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Re: [CentOS] yum/dnf diff

[Kenneth Porter]

On 6/5/2020 12:21 PM, Johnny Hughes wrote:

if you click on the six digit number, for example, e52775 for the
current latest "import 389-ds-base-1.3.10.1-9.el7_8".  The result is
every diff of every change for the rpm.


That's quite handy! But not what I'm looking for. I'm trying to figure 
out what edits I made to my config files.


My most recent case was trying to figure out what I'd done to my BIND 
files (/etc/named.*, /etc/logrotate.d/named, /var/named/*). I ended up 
just tarring them up and erasing and re-installing the bind package, 
then untarring my old config into a tmp directory and diffing the files 
individually, reapplying appropriate changes.


Some packages make this a bit easier, such as systemd unit files (where 
my customization never touches a package file) and fail2ban (where 
customizations go in a .local file that overrides settings in a .conf 
file. I much prefer this pattern, but it doesn't work with older 
packages like BIND. Some packages have a hybrid structure with a 
directory for customizations, like apache.



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Re: [CentOS] yum/dnf diff

[Johnny Hughes]

On 6/5/20 2:21 PM, Johnny Hughes wrote:
> On 6/5/20 11:55 AM, Kenneth Porter wrote:
>> --On Friday, June 05, 2020 9:10 AM -0500 Johnny Hughes
>>  wrote:
>>
>>> These are two totally separate programs and projects.
>>
>> I'm not talking about diff'ing the yum and dnf programs. I'm talking
>> about diffing the RPM packages that "rpm -V" reveals as changed. Such a
>> utility would download the package if it wasn't in the cache, unpack it
>> with cpio into a temp directory, and diff the component files against
>> the copies on disk.
>>
>> yum and dnf would only be involved because they maintain a package cache
>> so they might be the logical place to implement a plugin to do this.
> 
> Oh .. I misunderstood what you are after.
> 
> If you are dealing with CentOS RPMs .. you can just look at git.centos.org:
> 
> For example .. here is one CentOS Linux 7 rpm.  I'll pick 389-ds-base.
> 
> 
> https://git.centos.org/
> 
> Click into search and type 389-ds-base .. pick rpms/389-ds-base
> 
> Click on Branches on the left tabs .. In this example, I'll pick c7
> 
> Now if you click on the left commits tab. you will see each c7 rpm import.
> 
> if you click on the six digit number, for example, e52775 for the
> current latest "import 389-ds-base-1.3.10.1-9.el7_8".  The result is
> every diff of every change for the rpm.
> 
>

You can also do a git clone of any rpm and work with the branch on your
machine:

so:

git clone https://git.centos.org/rpms/389-ds-base.git

cd 389-ds-base

git checkout c7

git log

(shows)
commit e52775ada05eb168f4b1df79fc0350b5f38d494c
Author: CentOS Sources 
Date:   Tue May 12 08:34:50 2020 -0400

import 389-ds-base-1.3.10.1-9.el7_8

commit 4c04d8bc35c01089a6ec0a234558b3637603d9e1
Author: CentOS Sources 
Date:   Tue Mar 31 05:37:27 2020 -0400

import 389-ds-base-1.3.10.1-5.el7

(and a bunch more)

If you then did:

git diff 4c04d8bc35c01089a6ec0a234558b3637603d9e1
e52775ada05eb168f4b1df79fc0350b5f38d494c > diff

then the file diff would look just like the web info you got in the link
you did in my last post.




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Re: [CentOS] yum/dnf diff

[Johnny Hughes]

On 6/5/20 11:55 AM, Kenneth Porter wrote:
> --On Friday, June 05, 2020 9:10 AM -0500 Johnny Hughes
>  wrote:
> 
>> These are two totally separate programs and projects.
> 
> I'm not talking about diff'ing the yum and dnf programs. I'm talking
> about diffing the RPM packages that "rpm -V" reveals as changed. Such a
> utility would download the package if it wasn't in the cache, unpack it
> with cpio into a temp directory, and diff the component files against
> the copies on disk.
> 
> yum and dnf would only be involved because they maintain a package cache
> so they might be the logical place to implement a plugin to do this.

Oh .. I misunderstood what you are after.

If you are dealing with CentOS RPMs .. you can just look at git.centos.org:

For example .. here is one CentOS Linux 7 rpm.  I'll pick 389-ds-base.


https://git.centos.org/

Click into search and type 389-ds-base .. pick rpms/389-ds-base

Click on Branches on the left tabs .. In this example, I'll pick c7

Now if you click on the left commits tab. you will see each c7 rpm import.

if you click on the six digit number, for example, e52775 for the
current latest "import 389-ds-base-1.3.10.1-9.el7_8".  The result is
every diff of every change for the rpm.



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Re: [CentOS] yum/dnf diff

[Kenneth Porter]

--On Friday, June 05, 2020 9:10 AM -0500 Johnny Hughes  
wrote:



These are two totally separate programs and projects.


I'm not talking about diff'ing the yum and dnf programs. I'm talking about 
diffing the RPM packages that "rpm -V" reveals as changed. Such a utility 
would download the package if it wasn't in the cache, unpack it with cpio 
into a temp directory, and diff the component files against the copies on 
disk.


yum and dnf would only be involved because they maintain a package cache so 
they might be the logical place to implement a plugin to do this.




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Re: [CentOS] yum/dnf diff

[Johnny Hughes]

On 6/1/20 7:25 PM, Kenneth Porter wrote:
> I'm used to using "git diff" and "svn diff" to view changes in my
> development system. Is there a similar thing that works with changes
> between a repository package and the installed RPM? Ie. something that
> shows the changes in /etc hinted at by "rpm -V". I'm already using
> etckeeper+git but that would combine changes from updates with my own
> modifications.
> 
> The only thing I've found so far is a rather manual procedure:
> 
> 

You COULD diff the directories containing exploded source code .. but I
don't think it will help you.

These are two totally separate programs and projects.  It would be like
trying to diff GNOME and KDE because they serve the same function.  You
could technically do it, but the result would have very little meaning
as all the file names inside the code are different.  The diff would be
a copy of each file from both projects.

On an EL8 system, yum is a symlink to dnf.  So there is NO difference
between yum and dnf on EL8 (they are the exact same file .. /usr/bin/dnf).

The files for yum and dnf in /usr/bin/ are python scripts .. but they
also import many python libraries .. so they are not totally contained
in a single file.


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