Use XSLT for xml transforms

[blaggacao]

Stylesheets are the standard for transfomring XML documents, use it instead of error prone regular expressions.

Random example: https://gist.github.com/blaggacao/e7ba05c7b4aa36317046ceb843cbed9f

[yajo]

I think that it would be more familiar for odoo-ish people to just allow using xpath for matching instead of regexps. XSLT is a whole new world for many.

[yajo]

Oh man look at this from #46 😿

odoo-module-migrator/odoo_module_migrate/migration_scripts/migrate_120_130.py

Lines 36 to 70 in 75260e2

	re.compile(
	r"""
	# find a button...
	<button
	\s[^>]*
	# ... that is a oe_stat_button
	class=['"].*\b
	oe_stat_button
	\b.*['"]
	[^>]*>\s*
	# ... that contains a field
	<field\s+
	(
	[^>]*
	(
	# ... named "active"
	name=['"]active['"]|
	# ... with a boolean_button widget
	widget=['"]boolean_button['"]
	)
	[^>]*
	){2}
	[^>]*>\s*
	</button>
	""",
	re.VERBOSE,
	): """
	<field name="active" invisible="1" />
	<widget
	name="web_ribbon"
	title="Archived"
	bg_color="bg-danger"
	attrs="{'invisible': [('active', '=', True)]}"
	/>
	""",

This should be fixed quickly before the library grows into an unmaintainable mess of regexps... 🙈