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Add simple grammar-parsing template benchmark. New tool consume test template written in bash with some special grammar injections and produces multiple tests, run them and finally print a performance comparison table of different tests produced from one template. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210824101517.59802-2-vsementsov@virtuozzo.com> Reviewed-by: Hanna Reitz <hreitz@redhat.com> Signed-off-by: Hanna Reitz <hreitz@redhat.com>
63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
# Parser for test templates
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#
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# Copyright (c) 2021 Virtuozzo International GmbH.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import itertools
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from lark import Lark
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grammar = """
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start: ( text | column_switch | row_switch )+
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column_switch: "{" text ["|" text]+ "}"
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row_switch: "[" text ["|" text]+ "]"
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text: /[^|{}\[\]]+/
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"""
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parser = Lark(grammar)
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class Templater:
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def __init__(self, template):
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self.tree = parser.parse(template)
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c_switches = []
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r_switches = []
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for x in self.tree.children:
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if x.data == 'column_switch':
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c_switches.append([el.children[0].value for el in x.children])
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elif x.data == 'row_switch':
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r_switches.append([el.children[0].value for el in x.children])
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self.columns = list(itertools.product(*c_switches))
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self.rows = list(itertools.product(*r_switches))
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def gen(self, column, row):
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i = 0
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j = 0
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result = []
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for x in self.tree.children:
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if x.data == 'text':
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result.append(x.children[0].value)
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elif x.data == 'column_switch':
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result.append(column[i])
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i += 1
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elif x.data == 'row_switch':
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result.append(row[j])
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j += 1
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return ''.join(result)
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