tartrazine/lexers/pacmanconf.xml

<lexer>
  <config>
    <name>PacmanConf</name>
    <alias>pacmanconf</alias>
    <filename>pacman.conf</filename>
  </config>
  <rules>
    <state name="root">
      <rule pattern="#.*$">
        <token type="CommentSingle"/>
      </rule>
      <rule pattern="^\s*\[.*?\]\s*$">
        <token type="Keyword"/>
      </rule>
      <rule pattern="(\w+)(\s*)(=)">
        <bygroups>
          <token type="NameAttribute"/>
          <token type="Text"/>
          <token type="Operator"/>
        </bygroups>
      </rule>
      <rule pattern="^(\s*)(\w+)(\s*)$">
        <bygroups>
          <token type="Text"/>
          <token type="NameAttribute"/>
          <token type="Text"/>
        </bygroups>
      </rule>
      <rule pattern="(\$repo|\$arch|%o|%u)\b">
        <token type="NameVariable"/>
      </rule>
      <rule pattern=".">
        <token type="Text"/>
      </rule>
    </state>
  </rules>
</lexer>