Merge pull request easybuilders#3381 from PetrKralCZ/20240704125705_n…

…ew_pr_rubygem

Add support for generating `.gem` files from `.gemspec` files and support for `preinstallopts` in the RubyGem easyblock

easybuild/easyblocks/generic/rubygem.py

@@ -69,7 +69,6 @@ def run(self):
 
     def extract_step(self):
         """Skip extraction of .gem files, which are installed as downloaded"""
-
         if len(self.src) > 1:
             raise EasyBuildError("Don't know how to handle Ruby gems with multiple sources.")
         else:
@@ -83,20 +82,35 @@ def extract_step(self):
                 # unpack zipped gems, use specified path to gem file
                 super(RubyGem, self).extract_step()
 
-                if self.cfg['gem_file']:
-                    self.ext_src = os.path.join(src['finalpath'], self.cfg['gem_file'])
-                    if not os.path.exists(self.ext_src):
-                        raise EasyBuildError("Gem file not found at %s", self.ext_src)
-                else:
-                    raise EasyBuildError("Location to gem file in unpacked sources must be specified via gem_file")
-
     def configure_step(self):
         """No separate configuration for Ruby Gems."""
         pass
 
     def build_step(self):
-        """No separate build procedure for Ruby Gems."""
-        pass
+        src = self.src[0]
+        if self.cfg['gem_file']:
+            self.ext_src = os.path.join(src['finalpath'], self.cfg['gem_file'])
+            if not os.path.exists(self.ext_src):
+                raise EasyBuildError("Gem file not found at %s", self.ext_src)
+        else:
+            gemfile = "%s.gem" % self.name
+            gemfile_lower = "%s.gem" % self.name.lower()
+            if os.path.exists(gemfile):
+                self.ext_src = os.path.join(src['finalpath'], gemfile)
+            elif os.path.exists(gemfile_lower):
+                self.ext_src = os.path.join(src['finalpath'], gemfile_lower)
+            else:
+                gemspec = "%s.gemspec" % self.name
+                gemspec_lower = "%s.gemspec" % self.name.lower()
+                if os.path.exists(gemspec):
+                    run_cmd("gem build %s -o %s.gem" % (gemspec, self.name))
+                    self.ext_src = "%s.gem" % self.name
+                elif os.path.exists(gemspec_lower):
+                    run_cmd("gem build %s -o %s.gem" % (gemspec_lower, self.name.lower()))
+                    self.ext_src = "%s.gem" % self.name.lower()
+                else:
+                    raise EasyBuildError("No gem_file specified and no"
+                                         " %s.gemspec or %s.gemspec found." % (self.name, self.name.lower()))
 
     def test_step(self):
         """No separate (standard) test procedure for Ruby Gems."""
@@ -113,7 +127,8 @@ def install_step(self):
             env.setvar('GEM_HOME', self.installdir)
 
         bindir = os.path.join(self.installdir, 'bin')
-        run_cmd("gem install --bindir %s --local %s" % (bindir, self.ext_src))
+        cmd = "%s gem install --bindir %s --local %s" % (self.cfg['preinstallopts'], bindir, self.ext_src)
+        run_cmd(cmd)
 
     def make_module_extra(self):
         """Extend $GEM_PATH in module file."""