Looks like this fails on the Github ubuntu-22.04 runner, but I'm not sure how to debug further as I cannot find the actual image Github uses published anywhere. There's tooling to build all the images, but the instructions appear to require Azure which I do not have resources to use.

Tests pass locally for me, but I'm on macOS with rpm v4.19.1.1. The Github actions documentation claims that the Ubuntu 22.04 image includes rpm 4.17.0

I don't know anything more about the failure at this time. I won't merge until I understand that problem.

I'm unable to find a way to use Github Actions images, so I tried to reproduce this outside.

Best I can tell, rpm v4.19 works, but v4.17 does not.

I tested manually with this rpm spec:

Name: test
Version: 1.0
Release: 1
Summary: Nope
License: Nope

%description
none

%prep
# noop
%build
# noop
%install
cp -R . %{buildroot}

%clean
# noop

%files
/[\{][\{]?label?[\}][\}].text

• ✅ On macOS and rpm v4.19, this builds an rpm successfully.
• ❌ On Ubuntu 22.04 and rpm v4.17, this fails.
• ❌ On Ubuntu 24.04 and rpm v4.18, this fails.

Looking at the rpm release notes, I found this excerpt:

Improve shell-like globbing and escaping in %files (#1749)

This refers to rpm-software-management/rpm#1749 which seems pretty relevant.

Times like these remind me that maybe #54 would be a nice improvement.

I did a bit of testing and learned a few small things:

• This PR only works on RPM v4.19 or newer
• When buliding RPMs on RPM v4.18 or older, fpm will fail because rpmbuild errors.
• All GitHub Action images use versions of RPM that are too old, so all the test machines will fail.
• RPMs built on rpm v4.19 with these weird files will correctly install on RPM v4.18 and older!

They install fine on rpm v4.18 and older:

root@efed807b289b:/rpmbuild/RPMS/aarch64# rpm --version
RPM version 4.18.2
root@efed807b289b:/rpmbuild/RPMS/aarch64# rpm -qp test-1.0-1.aarch64.rpm -l
/{{ label }}.text
root@efed807b289b:/rpmbuild/RPMS/aarch64# rpm -Uvh test-1.0-1.aarch64.rpm
...
root@efed807b289b:/rpmbuild/RPMS/aarch64# ls /\{\{\ label\ \}\}.text
'/{{ label }}.text'

I think I can make this specific test skip if rpmbuild is older than rpm v4.19

Escaping { with [\{] builds fine with rpm v4.19, but fails on anything older. I'm gonna try replacing { with ?. If this works, maybe fpm can query the version of rpmbuild and use the best escaping method available.