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msetup: Give a nice error message if cmd_line.txt cannot be read 

As would happen if someone tried to manually call meson --wipe on a
directory configured with a version < 0.49.0
This commit is contained in:
Dylan Baker 2018-12-19 09:44:50 -08:00 committed by Xavier Claessens
parent 47b9c1a564
commit bd630fbe55
1 changed files with 7 additions and 2 deletions
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9
mesonbuild/msetup.py
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@ -62,8 +62,13 @@ class MesonApp:
# restore that file if anything bad happens. For example if
# configuration fails we need to be able to wipe again.
filename = coredata.get_cmd_line_file(self.build_dir)
with open(filename, 'r') as f:
content = f.read()
try:
with open(filename, 'r') as f:
content = f.read()
except FileNotFoundError:
raise MesonException(
'Cannot find cmd_line.txt. This is probably because this '
'build directory was configured with a meson version < 0.49.0.')
coredata.read_cmd_line_file(self.build_dir, options)