( )⚙ D9241 config: move message about leading spaces in config to config.py

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Differential D9241

config: move message about leading spaces in config to config.py
ClosedPublic

Authored by martinvonz on Oct 22 2020, 2:17 PM.

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rHG0883413e09bc: config: move message about leading spaces in config to config.py
Summary

When the config parser raises a ParseError, it uses the line that
failed to parse as the error message. It doesn't currently tell the
user anything about why it failed to parse. b13b99d39a46 (config:
highlight parse error caused by leading spaces (issue3214),
2014-03-16) added a checked based on the error *message* having
leading spaces. That has worked fine because only the config parser
uses the line itself as error message (I think the revset and fileset
parsers use more user-friendly proper messages). It still feels like a
hack. Let's make the config parser give a useful message about leading
whitespace instead. We should ideally follow up with more useful
messages for other parse errors in config files.

Diff Detail

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rHG Mercurial
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Event Timeline

martinvonz created this revision.Oct 22 2020, 2:17 PM
martinvonz added a commit: rHG0883413e09bc: config: move message about leading spaces in config to config.py.Oct 28 2020, 9:53 PM
This revision was not accepted when it landed; it landed in state Needs Review.
Closed by commit rHG0883413e09bc: config: move message about leading spaces in config to config.py (authored by martinvonz). · Explain Why
This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

PathPackages
Mmercurial/config.py (5 lines)
Mmercurial/dispatch.py (2 lines)
Mtests/test-config.t (6 lines)
Mtests/test-hgrc.t (3 lines)

Diff 23285

mercurial/config.py

if sections and section not in sections: if sections and section not in sections:
continue continue
if self.get(section, name) is not None: if self.get(section, name) is not None:
self._data[section] = self._data[section].preparewrite() self._data[section] = self._data[section].preparewrite()
del self._data[section][name] del self._data[section][name]
self._unset.append((section, name)) self._unset.append((section, name))
continue continue
raise error.ParseError(l.rstrip(), (b"%s:%d" % (src, line))) message = l.rstrip()
if l.startswith(b' '):
message = b"unexpected leading whitespace: %s" % message
raise error.ParseError(message, (b"%s:%d" % (src, line)))
def read(self, path, fp=None, sections=None, remap=None): def read(self, path, fp=None, sections=None, remap=None):
if not fp: if not fp:
fp = util.posixfile(path, b'rb') fp = util.posixfile(path, b'rb')
assert getattr(fp, 'mode', 'rb') == 'rb', ( assert getattr(fp, 'mode', 'rb') == 'rb', (
b'config files must be opened in binary mode, got fp=%r mode=%r' b'config files must be opened in binary mode, got fp=%r mode=%r'
% (fp, fp.mode,) % (fp, fp.mode,)
) )

mercurial/dispatch.py

if isinstance(inst, error.UnknownIdentifier): if isinstance(inst, error.UnknownIdentifier):
# make sure to check fileset first, as revset can invoke fileset # make sure to check fileset first, as revset can invoke fileset
similar = _getsimilar(inst.symbols, inst.function) similar = _getsimilar(inst.symbols, inst.function)
if inst.location is not None: if inst.location is not None:
write( write(
_(b"hg: parse error at %s: %s\n") _(b"hg: parse error at %s: %s\n")
% (pycompat.bytestr(inst.location), inst.message) % (pycompat.bytestr(inst.location), inst.message)
) )
if inst.message.startswith(b' '):
write(_(b"unexpected leading whitespace\n"))
else: else:
write(_(b"hg: parse error: %s\n") % inst.message) write(_(b"hg: parse error: %s\n") % inst.message)
_reportsimilar(write, similar) _reportsimilar(write, similar)
if inst.hint: if inst.hint:
write(_(b"(%s)\n") % inst.hint) write(_(b"(%s)\n") % inst.hint)
def _formatargs(args): def _formatargs(args):

tests/test-config.t

[255] [255]
Test hint about invalid syntax from leading white space Test hint about invalid syntax from leading white space
$ cat > .hg/hgrc << EOF $ cat > .hg/hgrc << EOF
> key=value > key=value
> EOF > EOF
$ hg showconfig $ hg showconfig
hg: parse error at $TESTTMP/.hg/hgrc:1: key=value hg: parse error at $TESTTMP/.hg/hgrc:1: unexpected leading whitespace: key=value
unexpected leading whitespace
[255] [255]
$ cat > .hg/hgrc << EOF $ cat > .hg/hgrc << EOF
> [section] > [section]
> key=value > key=value
> EOF > EOF
$ hg showconfig $ hg showconfig
hg: parse error at $TESTTMP/.hg/hgrc:1: [section] hg: parse error at $TESTTMP/.hg/hgrc:1: unexpected leading whitespace: [section]
unexpected leading whitespace
[255] [255]
Reset hgrc Reset hgrc
$ echo > .hg/hgrc $ echo > .hg/hgrc
Test case sensitive configuration Test case sensitive configuration

tests/test-hgrc.t

[255] [255]
#endif #endif
issue1829: wrong indentation issue1829: wrong indentation
$ echo '[foo]' > $HGRC $ echo '[foo]' > $HGRC
$ echo ' x = y' >> $HGRC $ echo ' x = y' >> $HGRC
$ hg version $ hg version
hg: parse error at $TESTTMP/hgrc:2: x = y hg: parse error at $TESTTMP/hgrc:2: unexpected leading whitespace: x = y
unexpected leading whitespace
[255] [255]
$ "$PYTHON" -c "from __future__ import print_function; print('[foo]\nbar = a\n b\n c \n de\n fg \nbaz = bif cb \n')" \ $ "$PYTHON" -c "from __future__ import print_function; print('[foo]\nbar = a\n b\n c \n de\n fg \nbaz = bif cb \n')" \
> > $HGRC > > $HGRC
$ hg showconfig foo $ hg showconfig foo
foo.bar=a\nb\nc\nde\nfg foo.bar=a\nb\nc\nde\nfg
foo.baz=bif cb foo.baz=bif cb