[PATCH 0/1] Update eudev home-page URL

[PATCH 0/1] Update eudev home-page URL

[Leo Famulari]

This is the new home-page for eudev.

This will require ~600 packages to be rebuilt.

Leo Famulari (1):
  gnu: eudev: Update home-page URL.

 gnu/packages/linux.scm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.6.2

[PATCH 1/1] gnu: eudev: Update home-page URL.

[Leo Famulari]

* gnu/packages/linux.scm (eudev)[home-page]: Add up-to-date URL.
---
 gnu/packages/linux.scm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index 535bd84..1fc3c4e 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -1568,7 +1568,7 @@ from the module-init-tools project.")
        ("gperf" ,gperf)))
     (inputs
      `(("kmod" ,kmod)))
-    (home-page "http://www.gentoo.org/proj/en/eudev/")
+    (home-page "https://wiki.gentoo.org/wiki/Project:Eudev")
     (synopsis "Userspace device management")
     (description "Udev is a daemon which dynamically creates and removes
 device nodes from /dev/, handles hotplug events and loads drivers at boot
-- 
2.6.2

Re: [PATCH 1/1] gnu: eudev: Update home-page URL.

[Mark H Weaver]

Leo Famulari <leo@famulari.name> writes:
> * gnu/packages/linux.scm (eudev)[home-page]: Add up-to-date URL.

Looks good, please push!

This won't require any rebuilds, because the 'home-page' field is not
included in the generated derivations.

    Thanks,
      Mark

Re: [PATCH 1/1] gnu: eudev: Update home-page URL.

[Leo Famulari]

On Fri, Dec 25, 2015 at 09:11:04AM -0500, Mark H Weaver wrote:
> Leo Famulari <leo@famulari.name> writes:
> > * gnu/packages/linux.scm (eudev)[home-page]: Add up-to-date URL.
> 
> Looks good, please push!

Pushed as e1921a384c.

> 
> This won't require any rebuilds, because the 'home-page' field is not
> included in the generated derivations.
> 
>     Thanks,
>       Mark

Re: [PATCH 1/1] gnu: eudev: Update home-page URL.

[Leo Famulari]

On Fri, Dec 25, 2015 at 09:11:04AM -0500, Mark H Weaver wrote:
> Leo Famulari <leo@famulari.name> writes:
> > * gnu/packages/linux.scm (eudev)[home-page]: Add up-to-date URL.
> 
> Looks good, please push!
> 
> This won't require any rebuilds, because the 'home-page' field is not
> included in the generated derivations.

Ah, right, of course! Because it doesn't affect the sha256 hash of the
source. And the same for the source URI?

> 
>     Thanks,
>       Mark

Re: [PATCH 1/1] gnu: eudev: Update home-page URL.

[Mark H Weaver]

Leo Famulari <leo@famulari.name> writes:

> On Fri, Dec 25, 2015 at 09:11:04AM -0500, Mark H Weaver wrote:
>> Leo Famulari <leo@famulari.name> writes:
>> > * gnu/packages/linux.scm (eudev)[home-page]: Add up-to-date URL.
>> 
>> Looks good, please push!
>> 
>> This won't require any rebuilds, because the 'home-page' field is not
>> included in the generated derivations.
>
> Ah, right, of course! Because it doesn't affect the sha256 hash of the
> source.

It's true that it doesn't affect the hash of the source, but that would
not be sufficient to ensure no rebuilds.  Adding a new phase would not
change the hash of the source, but it would affect the _derivation_ (as
serialized in the *.drv file) and thus would require rebuilds.  The
'home-page' field is not included in the derivation.

> And the same for the source URI?

Changing the source URI affects the derivation that downloads the
source, however, that derivation is of a special kind called a "fixed
output derivation", which means that the sha256 hash of the output is
known in advance.  Such derivations do not need to be rebuilt even if
the derivation changes, as long as the hash stays the same, because it
is presumed that the output would not change.

     Regards,
       Mark

Re: [PATCH 1/1] gnu: eudev: Update home-page URL.

[Leo Famulari]

On Sun, Dec 27, 2015 at 10:46:12AM -0500, Mark H Weaver wrote:
> Leo Famulari <leo@famulari.name> writes:
> 
> > On Fri, Dec 25, 2015 at 09:11:04AM -0500, Mark H Weaver wrote:
> >> Leo Famulari <leo@famulari.name> writes:
> >> > * gnu/packages/linux.scm (eudev)[home-page]: Add up-to-date URL.
> >> 
> >> Looks good, please push!
> >> 
> >> This won't require any rebuilds, because the 'home-page' field is not
> >> included in the generated derivations.
> >
> > Ah, right, of course! Because it doesn't affect the sha256 hash of the
> > source.
> 
> It's true that it doesn't affect the hash of the source, but that would
> not be sufficient to ensure no rebuilds.  Adding a new phase would not
> change the hash of the source, but it would affect the _derivation_ (as
> serialized in the *.drv file) and thus would require rebuilds.  The
> 'home-page' field is not included in the derivation.
> 
> > And the same for the source URI?
> 
> Changing the source URI affects the derivation that downloads the
> source, however, that derivation is of a special kind called a "fixed
> output derivation", which means that the sha256 hash of the output is
> known in advance.  Such derivations do not need to be rebuilt even if
> the derivation changes, as long as the hash stays the same, because it
> is presumed that the output would not change.

Thank you for taking the time to explain this. For everyone reading
along, there is some more information about fixed-output derivations in
the manual here:
https://www.gnu.org/software/guix/manual/html_node/Derivations.html