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authormathieui <mathieui@mathieui.net>2014-04-21 23:46:12 +0200
committermathieui <mathieui@mathieui.net>2014-04-21 23:46:12 +0200
commit266ab8e10d93d52af7210a7c273b616944d4093c (patch)
treef78e0d4eae7cdc47356cd625fed15e5c47e85953 /src/config.py
parentd66aa8cf66e0bc709cedb06ec855feb0ca238761 (diff)
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Split the config.write_in_file method to be more modular and cleaner
Will also allow a remove_in_file or whatever to remove options instead of blanking them.
Diffstat (limited to 'src/config.py')
-rw-r--r--src/config.py134
1 files changed, 90 insertions, 44 deletions
diff --git a/src/config.py b/src/config.py
index 0e27372b..f9ac1379 100644
--- a/src/config.py
+++ b/src/config.py
@@ -26,7 +26,6 @@ from os import environ, makedirs, path, remove
from shutil import copy2
from args import parse_args
-
class Config(RawConfigParser):
"""
load/save the config to a file
@@ -35,14 +34,14 @@ class Config(RawConfigParser):
RawConfigParser.__init__(self, None)
# make the options case sensitive
self.optionxform = str
- self.read_file(file_name)
-
- def read_file(self, file_name):
self.file_name = file_name
+ self.read_file()
+
+ def read_file(self):
try:
- RawConfigParser.read(self, file_name, encoding='utf-8')
+ RawConfigParser.read(self, self.file_name, encoding='utf-8')
except TypeError: # python < 3.2 sucks
- RawConfigParser.read(self, file_name)
+ RawConfigParser.read(self, self.file_name)
# Check config integrity and fix it if it’s wrong
for section in ('bindings', 'var'):
if not self.has_section(section):
@@ -70,7 +69,9 @@ class Config(RawConfigParser):
return default
return res
- def get_by_tabname(self, option, default, tabname, fallback=True, fallback_server=True):
+ def get_by_tabname(
+ self, option, default, tabname,
+ fallback=True, fallback_server=True):
"""
Try to get the value for the option. First we look in
a section named `tabname`, if the option is not present
@@ -144,44 +145,36 @@ class Config(RawConfigParser):
Just find the right section, and then find the
right option, and edit it.
"""
- if file_ok(self.file_name):
- try:
- with open(self.file_name, 'r', encoding='utf-8') as df:
- lines_before = (line.strip() for line in df.readlines())
- except:
- log.error('Unable to read the config file %s',
- self.file_name,
- exc_info=True)
- return False
+ result = self._parse_file()
+ if not result:
+ return False
else:
- lines_before = []
- result_lines = []
- we_are_in_the_right_section = False
- written = False
- section_found = False
- for line in lines_before:
- if line.startswith('['): # check the section
- if we_are_in_the_right_section and not written:
- result_lines.append('%s = %s' % (option, value))
- written = True
- if line == '[%s]' % section:
- we_are_in_the_right_section = True
- section_found = True
- else:
- we_are_in_the_right_section = False
- if (line.startswith('%s ' % (option,)) or
- line.startswith('%s=' % (option,)) or
- line.startswith('%s = ' % (option,))) and we_are_in_the_right_section:
- line = '%s = %s' % (option, value)
- written = True
- result_lines.append(line)
+ sections, result_lines = result
- if not section_found:
+ if not section in sections:
result_lines.append('[%s]' % section)
result_lines.append('%s = %s' % (option, value))
- elif not written:
- result_lines.append('%s = %s' % (option, value))
-
+ else:
+ begin, end = sections[section]
+ added = False
+ for line in result_lines[begin:end]:
+ if (line.startswith('%s ' % option) or
+ line.startswith('%s=' % option)):
+ pos = result_lines.index(line)
+ result_lines[pos] = '%s = %s' % (option, value)
+ added = True
+ break
+
+ if not added:
+ result_lines.insert(end, '%s = %s' % (option, value))
+
+ return self._write_file(result_lines)
+
+ def _write_file(self, lines):
+ """
+ Write the config file, write to a temporary file
+ before copying it to the final destination
+ """
try:
prefix, file = path.split(self.file_name)
filename = path.join(prefix, '.%s.tmp' % file)
@@ -191,7 +184,7 @@ class Config(RawConfigParser):
os.O_WRONLY | os.O_CREAT,
0o600),
'w')
- for line in result_lines:
+ for line in lines:
fd.write('%s\n' % line)
fd.close()
copy2(filename, self.file_name)
@@ -203,6 +196,55 @@ class Config(RawConfigParser):
success = True
return success
+ def _parse_file(self):
+ """
+ Parse the config file and return the list of sections with
+ their start and end positions, and the lines in the file.
+
+ Duplicate sections are preserved but ignored for the parsing.
+
+ Returns an empty tuple if reading fails
+ """
+ if file_ok(self.file_name):
+ try:
+ with open(self.file_name, 'r', encoding='utf-8') as df:
+ lines_before = [line.strip() for line in df]
+ except:
+ log.error('Unable to read the config file %s',
+ self.file_name,
+ exc_info=True)
+ return tuple()
+ else:
+ lines_before = []
+
+ sections = {}
+ result_lines = []
+ duplicate_section = False
+ current_section = ''
+ current_line = 0
+
+ for line in lines_before:
+ if line.startswith('['):
+ if not duplicate_section and current_section:
+ sections[current_section][1] = current_line
+
+ duplicate_section = False
+ current_section = line[1:-1]
+
+ if current_section in sections:
+ log.error('Error while reading the configuration file,'
+ ' skipping until next section')
+ duplicate_section = True
+ else:
+ sections[current_section] = [current_line, current_line]
+
+ result_lines.append(line)
+ current_line += 1
+ if not duplicate_section:
+ sections[current_section][1] = current_line
+
+ return (sections, result_lines)
+
def set_and_save(self, option, value, section=DEFSECTION):
"""
set the value in the configuration then save it
@@ -221,7 +263,10 @@ class Config(RawConfigParser):
elif current.lower() == "true":
value = "false"
else:
- return (_("Could not toggle option: %s. Current value is %s.") % (option, current or _("empty")), 'Warning')
+ return (_('Could not toggle option: %s.'
+ ' Current value is %s.') %
+ (option, current or _("empty")),
+ 'Warning')
if self.has_section(section):
RawConfigParser.set(self, section, option, value)
else:
@@ -295,7 +340,8 @@ def run_cmdline_args(CONFIG_PATH):
# Copy a default file if none exists
if not path.isfile(options.filename):
- default = path.join(path.dirname(__file__), '../data/default_config.cfg')
+ default = path.join(path.dirname(__file__),
+ '../data/default_config.cfg')
other = path.join(path.dirname(__file__), 'default_config.cfg')
if path.isfile(default):
copy2(default, options.filename)