common: add a writevars helper

common.lua

@@ -113,6 +113,21 @@ local function getbestsuffix(rpmvar, value)
   return best
 end
 
+-- https://github.com/rpm-software-management/rpm/issues/581
+-- Writes the content of a list of rpm variables to a macro spec file.
+-- The target file must contain the corresponding anchors.
+-- For example writevars("myfile", {"foo","bar"}) will replace:
+--   @@FOO@@ with the rpm evaluation of %{foo} and
+--   @@BAR@@ with the rpm evaluation of %{bar}
+-- in myfile
+local function writevars(macrofile,rpmvars)
+  for _, rpmvar in ipairs(rpmvars) do
+    print("sed -i 's\029" .. string.upper("@@" .. rpmvar .. "@@") ..
+                   "\029" .. rpm.expand(  "%{" .. rpmvar .. "}" ) ..
+                   "\029g' " .. macrofile .. "\n")
+  end
+end
+
 return {
   explicitset   = explicitset,
   explicitunset = explicitunset,
@@ -123,4 +138,5 @@ return {
   getsuffixed   = getsuffixed,
   getsuffixes   = getsuffixes,
   getbestsuffix = getbestsuffix,
+  writevars     = writevars,
 }

macros.fedora-misc

@@ -0,0 +1,30 @@
+# Some miscellaneous Fedora-related macros
+
+# List files matching inclusion globs, excluding files matching exclusion blogs
+# Parameters:
+#  -i "<globs>" include shell globs (also takes all other macro arguments)
+#  -x "<globs>" exclude shell globs
+%listfiles(i:x:) %{expand:
+while IFS= read -r -d $'\\n' finc ; do
+  printf "%s\\n" %{?-x*} \\
+    | xargs -i realpath --relative-base=. '{}' \\
+    | grep "${finc}" >/dev/null || echo "${finc}"
+done <<< $(printf "%s\\n" %{?-i*} %* | xargs -i realpath --relative-base=. '{}' | sort -u)
+}
+
+# https://github.com/rpm-software-management/rpm/issues/581
+# Write the contents of a list of rpm variables to a macro file.
+# The target file must contain the corresponding anchors.
+# For example %writevars -f myfile foo bar will replace:
+#  @@FOO@@ with the rpm evaluation of %{foo} and
+#  @@BAR@@ with the rpm evaluation of %{bar}
+# in myfile
+%writevars(f:) %{lua:
+local    fedora = require "fedora.common"
+local macrofile = rpm.expand("%{-f*}")
+local   rpmvars = {}
+for i = 1, rpm.expand("%#") do
+  table.insert(rpmvars, rpm.expand("%" .. i))
+end
+fedora.writevars(macrofile,rpmvars)
+}

macros.forge

@@ -83,15 +83,3 @@ end
 %forgeautosetup(z:vNS:p:q) %{lua:
 print(rpm.expand("%autosetup %{-v} %{-N} %{?-S} %{?-p} %{?forgesetupargs" .. rpm.expand("%{-z*}") .. "}\\n"))
 }
-
-# List files matching inclusion globs, excluding files matching exclusion blogs
-# Parameters:
-#  -i "<globs>" include shell globs (also takes all other macro arguments)
-#  -x "<globs>" exclude shell globs
-%listfiles(i:x:) %{expand:
-while IFS= read -r -d $'\\n' finc ; do
-  printf "%s\\n" %{?-x*} \\
-    | xargs -i realpath --relative-base=. '{}' \\
-    | grep "${finc}" >/dev/null || echo "${finc}"
-done <<< $(printf "%s\\n" %{?-i*} %* | xargs -i realpath --relative-base=. '{}' | sort -u)
-}

redhat-rpm-config.spec

@@ -40,6 +40,7 @@ Source151: macros.kmp
 Source152: macros.vpath
 Source153: macros.forge
 Source154: macros.ldconfig
+Source155: macros.fedora-misc
 
 # Build policy scripts
 # this comes from https://github.com/rpm-software-management/rpm/pull/344
@@ -177,6 +178,7 @@ install -p -m 644 -t %{buildroot}%{_rpmluadir}/fedora/srpm forge.lua
 %{_rpmconfigdir}/macros.d/macros.forge
 %{_rpmconfigdir}/macros.d/macros.ldconfig
 %{_rpmconfigdir}/macros.d/macros.vpath
+%{_rpmconfigdir}/macros.d/macros.fedora-misc
 %dir %{_rpmluadir}/fedora
 %dir %{_rpmluadir}/fedora/srpm
 %dir %{_rpmluadir}/fedora/rpm