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6b1aac3ccf
m4 was nice in '85, but the syntax feels a bit dated. Since we use python for
meson, let's use a popular python templating engine to replace some m4 usage.
A little nicety is that typos are caught:
FAILED: sysusers.d/systemd-remote.conf
/usr/bin/meson --internal exe --capture sysusers.d/systemd-remote.conf -- /home/zbyszek/src/systemd/tools/meson-render-jinja2.py config.h ../sysusers.d/systemd-remote.conf.j2
Traceback (most recent call last):
File "/home/zbyszek/src/systemd/tools/meson-render-jinja2.py", line 28, in <module>
print(render(sys.argv[2], defines))
File "/home/zbyszek/src/systemd/tools/meson-render-jinja2.py", line 24, in render
return template.render(defines)
File "/usr/lib/python3.9/site-packages/jinja2/environment.py", line 1090, in render
self.environment.handle_exception()
File "/usr/lib/python3.9/site-packages/jinja2/environment.py", line 832, in handle_exception
reraise(*rewrite_traceback_stack(source=source))
File "/usr/lib/python3.9/site-packages/jinja2/_compat.py", line 28, in reraise
raise value.with_traceback(tb)
File "<template>", line 8, in top-level template code
jinja2.exceptions.UndefinedError: 'HAVE_MICROHTTP' is undefined
This checking mirrors what 349cc4a507 did for C defines.
29 lines
735 B
Python
Executable File
29 lines
735 B
Python
Executable File
#!/usr/bin/env python3
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# SPDX-License-Identifier: LGPL-2.1+
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import jinja2
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import re
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import sys
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def parse_config_h(filename):
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# Parse config.h file generated by meson.
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ans = {}
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for line in open(filename):
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m = re.match(r'#define\s+(\w+)\s+(.*)', line)
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if not m:
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continue
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a, b = m.groups()
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if b and b[0] in '0123456789"':
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b = eval(b)
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ans[a] = b
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return ans
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def render(filename, defines):
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text = open(filename).read()
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template = jinja2.Template(text, trim_blocks=True, undefined=jinja2.StrictUndefined)
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return template.render(defines)
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if __name__ == '__main__':
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defines = parse_config_h(sys.argv[1])
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print(render(sys.argv[2], defines))
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