extract key list from the template file

[obliguedon]

identify all keys in the template file that follow those paterns:

• {<key>}
• {<key>=<extension>}
• {<prefix>{<key>}}
• {{<key>}<sufix>}
• {<prefix>{<key>}<sufix>}
• {<prefix>{<key>=<extension>}}
• {{<key>=<extension>}<sufix>}
• {<prefix>{<key>=<extension>}<sufix>}

example parterns:

• to create a list of all SystemVerilog sources in the tree of YAML files: \ {sources=.sv}
• for all the include directories: \ {+incdir+{include-dir}}
• for a list of all sources: \ {{sources}\n}

[obliguedon]

a regex that may work: "(?:{{1,2}(?:(?P<prefix>[a-zA-z0-9\-\+\_\\]+){)?(?P<key>[a-zA-z0-9\-]*)(?:\=(?P<extension>\.[a-zA-z0-9]+))?(?:}(?P<sufix>[a-zA-z0-9\-\+\_\\]+))?}{1,2})"g