It is not possible to create RPM source package with additional macros

[uddr]

Short description of the problem

It is not possible to create RPM source package with additional macros. 'buildsrpm' command does not include 'rpmbuild_opts'. The source packages which are built by rpmbuild and mock are different.
With rebuild command this is possible

Output of rpm -q mock

mock-3.5-1.el8.noarch

Steps to reproduce issue

1. Build RPM source package via rpmbuild

`rpmbuild -D '_buildhost docker' -D 'source_date_epoch_from_changelog 1' -D '_topdir /root/rpmbuild' -bs file.spec

2. Build RPM source package via mock

`mock -v --resultdir /root/rpmbuild/SRPMS --rpmbuild-opts="-D '_buildhost docker' -D 'source_date_epoch_from_changelog 1' -D '_topdir /root/rpmbuild'" --buildsrpm --spec /root/rpmbuild/SPECS/openvpn3.spec --sources /root/rpmbuild/SOURCES

3. Compare those two packages (diffoscope is the best for this in my opinion) - they are different, additional macros are not applied.

Small diff from diffoscope output

│ -BUILDTIME: 1682996111
│ -BUILDHOST: 7cdd84d13d27
│ +BUILDTIME: 1682996698
│ +BUILDHOST: 734ffc1c6198

Do not forget to mention full commandline with the mock command you executed.

Any additional notes

Output of `mock --debug-config`

PUT THE OUTPUT HERE

[xsuchy]

1. more convenient is config_opts['macros']['%Add_your_macro_name_here'] = "add macro value here"

2. especially for host you can use config_opts['macros']['%_buildhost'] = 'my.own.hostname'

[uddr]

Thanks for the suggestion.
For _buildhost it should work but it seems macros like source_date_epoch_from_changelog is not possible to pass at all

mock/mock/py/mockbuild/backend.py

Line 695 in cab1275

def rebuild_installed_srpm(self, spec_path, timeout):

or did I miss something?

[xsuchy]

The macros specified in config_opts['macros'] are not passed on command line, but are put in ~/.rpmmacros that is read by rpmbuild.

[uddr]

Thanks for the response. I understand the idea. But let's take a look on this wider.
We have buildsrpm parameter which is actually rpmbuild -bs. And rebuild parameter which is rpmbuild -bb (not only but probably most common)

rpmbuild accepts macros (-D) for both (and they works).
But mock don't have rpmbuild_opts parameter for buildsrpm case. At all.