Borrow some code from fonts-rpm-macros, to drop a dependant code to generate srpm

google-noto-fonts.spec

@@ -514,8 +514,106 @@ local function genfcconf(table)
     _fcconfbuild = (_fcconfbuild ~= '' and _fcconfbuild .. "\n" or '') .. "cat<<_EOL_>" .. table.fcconf .. "\\\n" .. xml .. "\n_EOL_\\"
 end
 
+-- Borrowed from fonts-rpm-macros
+-- koji doesn't sasisfy BR during generating srpm yet.
+-- We can't add a dependant code to fonts-rpm-macros at this stage.
+
+-- https://github.com/rpm-software-management/rpm/issues/566
+-- Reformat a text intended to be used used in a package description, removing
+-- rpm macro generation artefacts.
+-- – remove leading and ending empty lines
+-- – trim intermediary empty lines to a single line
+-- – fold on spaces
+-- Should really be a %%{wordwrap:…} verb
+local function wordwrap(text)
+  text = rpm.expand(text .. "\n")
+  text = string.gsub(text, "\t",              "  ")
+  text = string.gsub(text, "\r",              "\n")
+  text = string.gsub(text, " +\n",            "\n")
+  text = string.gsub(text, "\n+\n",           "\n\n")
+  text = string.gsub(text, "^\n",             "")
+  text = string.gsub(text, "\n( *)[-*—][  ]+", "\n%1– ")
+  output = ""
+  for line in string.gmatch(text, "[^\n]*\n") do
+    local pos = 0
+    local advance = ""
+    for word in string.gmatch(line, "%s*[^%s]*\n?") do
+      local wl, bad = utf8.len(word)
+      if not wl then
+        print("%{warn:Invalid UTF-8 sequence detected in:}" ..
+              "%{warn:" .. word .. "}" ..
+              "%{warn:It may produce unexpected results.}")
+        wl = bad
+      end
+      if (pos == 0) then
+        advance, n = string.gsub(word, "^(%s*– ).*", "%1")
+        if (n == 0) then
+          advance = string.gsub(word, "^(%s*).*", "%1")
+        end
+        advance = string.gsub(advance, "– ", "  ")
+        pos = pos + wl
+      elseif  (pos + wl  < 81) or
+             ((pos + wl == 81) and string.match(word, "\n$")) then
+        pos = pos + wl
+      else
+        word = advance .. string.gsub(word, "^%s*", "")
+        output = output .. "\n"
+        pos = utf8.len(word)
+      end
+      output = output .. word
+      if pos > 80 then
+        pos = 0
+        if not string.match(word, "\n$") then
+          output = output .. "\n"
+        end
+      end
+    end
+  end
+  output = string.gsub(output, "\n*$", "\n")
+  return output
+end
+
+-- Reformat some text into something that can be included in an AppStream
+-- XML description
+local function txt2xml(text)
+  local        text = wordwrap(text)
+  local      output = ""
+  local     oldtag  = nil
+  local oldadvance  = nil
+  local      newtag = nil
+  text = string.gsub(text, "^\n*", "")
+  text = string.gsub(text, "\n*$", "\n")
+  for line in string.gmatch(text, "[^\n]*\n") do
+    local change = true
+    local advance, n = string.gsub(line, "^(%s*– ).*", "%1")
+    if (n == 1) then
+      newtag = "li"
+    else
+      advance = string.gsub(line, "^(%s*).*", "%1")
+      if (line == "\n") then
+        newtag = nil
+      elseif (advance ~= oldadvance) then
+        newtag = "p"
+      else
+        change = false
+      end
+    end
+    local result = ""
+    if change then
+      result     = string.gsub(line, "^" .. advance, switchtag(oldtag,newtag))
+      oldtag     = newtag
+      oldadvance = string.gsub(advance, "– ", "  ")
+    else
+      result = string.gsub(line, "^" .. advance, " ")
+    end
+    result = string.gsub(result, "\n$", "")
+    output = output .. result
+  end
+  output = output .. closetag(oldtag, nil)
+  return output
+end
+
 local function genmetainfo(table)
-    local fonts = require "fedora.rpm.fonts"
     local xmlfontname = '$(cmd=$(for f in %{buildroot}' .. table.filename .. '; do fc-scan "$f" -f "echo \\\\\"    <font>%{fullname[0]}</font>\\\\\";"; done); if test x"$cmd" != x; then echo "echo \\\\\"  <provides>\\\\\"; $cmd echo \\\\\"  </provides>\\\\\""|sh; fi|grep -v "font></font")'
     local xmlfontlang = '$(cmd=$(for f in %{buildroot}' .. table.filename .. '; do fc-scan "$f" -f "%{[]lang{echo \\\\\"    <lang>%{lang}</lang>\\\\\";}}"; done); if test x"$cmd" != x; then echo "echo \\\\\"  <languages>\\\\\"; ($cmd)|sort -u; echo \\\\\"  </languages>\\\\\""|sh; fi)'
     local xml = [[
@@ -528,7 +626,7 @@ local function genmetainfo(table)
   <name>Noto ]] .. table.family .. [[</name>\
   <summary><![CDATA[Noto ]] .. table.summary .. [[\]\]></summary>\
   <description>\
-]] .. fonts.txt2xml(table.description) .. "\\\n" .. [[
+]] .. txt2xml(table.description) .. "\\\n" .. [[
   </description>\
   <updatecontact>]] .. rpm.expand("%{fontcontact}") .. [[</updatecontact>\
   <url type=\"homepage\">]] .. rpm.expand("%{url}") .. [[</url>\