tf 4 #19
tf 4 #19
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WalkthroughThe changes update the Fish shell alias extraction logic and its related test. The alias parsing function was simplified to assume a consistent "alias name value" format, removing handling for alternate formats. The corresponding test fixture and assertions were adjusted to match the new parsing logic, reducing the number of tested alias formats. Changes
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SummaryThis PR refactors the Pull Request Impact: 1 🔍 See your Change Graph🔄 File Changes Overview
📊 Impact SummaryThis tables shows the impact of the changes in the codebase
📜 Blar InstructionsBlar Commands
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Actionable comments posted: 2
🔭 Outside diff range comments (1)
thefuck_4/tests/shells/test_fish.py (1)
60-72: 🛠️ Refactor suggestionAdd test cases for error handling and edge cases.
The test now only validates the happy path but doesn't verify that the function handles malformed alias lines gracefully.
Add a dedicated test method to verify error handling:
def test_get_aliases_handles_malformed_input(self, shell, mocker): """Test that malformed alias lines don't crash the parser.""" mock = mocker.patch('thefuck.shells.fish.Popen') mock.return_value.stdout.read.side_effect = [ b'cd\nfish_config\nfuck', # functions b'alias g git\n\ninvalid_line\nalias_without_space\nalias valid_alias value' # mixed valid/invalid aliases ] # Should not crash and should return valid aliases only aliases = shell.get_aliases() assert 'g' in aliases assert aliases['g'] == 'git' assert 'valid_alias' in aliases assert aliases['valid_alias'] == 'value'
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📒 Files selected for processing (2)
thefuck_4/tests/shells/test_fish.py(2 hunks)thefuck_4/thefuck/shells/fish.py(1 hunks)
🔇 Additional comments (1)
thefuck_4/thefuck/shells/fish.py (1)
23-25:❓ Verification inconclusive
Verify that Fish shell always outputs aliases in the expected format.
The parsing logic now assumes a strict "alias name value" format. This change removes handling for alternative formats that may exist in real Fish shell environments.
Please run this script to verify the consistency of Fish shell alias output format:
🏁 Script executed:
#!/bin/bash # Description: Verify Fish shell alias output format consistency # Check if fish is available and examine its alias output format if command -v fish &> /dev/null; then echo "=== Fish shell alias output sample ===" fish -ic 'alias' | head -10 echo -e "\n=== Checking for potential edge cases ===" # Look for aliases that might not follow "alias name value" format fish -ic 'alias' | grep -v '^alias [a-zA-Z_][a-zA-Z0-9_]* ' echo -e "\n=== Count of alias lines ===" fish -ic 'alias' | wc -l else echo "Fish shell not available for testing" fiLength of output: 100
Confirm Fish alias output format supports strict parsing
The parsing in
thefuck_4/thefuck/shells/fish.py(lines 23–25) currently assumes every alias line is exactly:alias name valueHowever, Fish’s
aliasfunction can emit flags (e.g.-g,--description) or other variants:
- File:
thefuck_4/thefuck/shells/fish.py(lines 23–25)- Action: On a system with Fish installed, run
to find any lines that don’t matchfish -ic 'alias' | grep -v -E '^alias(?:\s+-\w+)*\s+\S+\s+.*$'alias[ flags] name value.- If you spot edge cases, update the parser to something like:
so it handles optional flags before the alias name.import re ALIAS_RE = re.compile(r'^alias(?:\s+-\w+)*\s+(\S+)\s+(.*)$')Please verify in your Fish environment and adjust the code accordingly.
| alias_out = proc.stdout.read().decode('utf-8').strip().split('\n') | ||
| for alias in alias_out: | ||
| name, value = alias.replace('alias ', '', 1).split(' ', 1) | ||
| if name not in overridden: | ||
| aliases[name] = value | ||
| return aliases |
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Add error handling for malformed alias lines to prevent runtime crashes.
The simplified parsing logic assumes all alias lines follow the exact "alias name value" format, but lacks error handling for edge cases that could cause a ValueError.
Potential issues:
- Lines that don't contain a space after removing "alias " will cause unpacking errors
- Empty lines or malformed output could crash the function
- Lines not starting with "alias " will have unexpected behavior
Apply this diff to add robust error handling:
@cache('~/.config/fish/config.fish')
def _get_aliases(overridden):
aliases = {}
proc = Popen(['fish', '-ic', 'alias'], stdout=PIPE, stderr=DEVNULL)
alias_out = proc.stdout.read().decode('utf-8').strip().split('\n')
for alias in alias_out:
+ if not alias.strip() or not alias.startswith('alias '):
+ continue
+ try:
name, value = alias.replace('alias ', '', 1).split(' ', 1)
+ except ValueError:
+ # Skip malformed alias lines
+ continue
if name not in overridden:
aliases[name] = value
return aliases📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| alias_out = proc.stdout.read().decode('utf-8').strip().split('\n') | |
| for alias in alias_out: | |
| name, value = alias.replace('alias ', '', 1).split(' ', 1) | |
| if name not in overridden: | |
| aliases[name] = value | |
| return aliases | |
| @cache('~/.config/fish/config.fish') | |
| def _get_aliases(overridden): | |
| aliases = {} | |
| proc = Popen(['fish', '-ic', 'alias'], stdout=PIPE, stderr=DEVNULL) | |
| alias_out = proc.stdout.read().decode('utf-8').strip().split('\n') | |
| for alias in alias_out: | |
| if not alias.strip() or not alias.startswith('alias '): | |
| continue | |
| try: | |
| name, value = alias.replace('alias ', '', 1).split(' ', 1) | |
| except ValueError: | |
| # Skip malformed alias lines | |
| continue | |
| if name not in overridden: | |
| aliases[name] = value | |
| return aliases |
🤖 Prompt for AI Agents
In thefuck_4/thefuck/shells/fish.py around lines 23 to 28, the alias parsing
code assumes every line starts with "alias " and contains a space to split into
name and value, which can cause runtime errors if the line is malformed. To fix
this, add error handling by first checking if the line starts with "alias ",
then safely splitting it and handling cases where the split does not produce two
parts. Skip or ignore lines that do not meet these conditions to prevent
ValueError and ensure robust parsing.
| b'man\nmath\npopd\npushd\nruby'), | ||
| (b'alias fish_key_reader /usr/bin/fish_key_reader\nalias g git\n' | ||
| b'alias alias_with_equal_sign=echo\ninvalid_alias'), b'func1\nfunc2', b''] | ||
| b'alias fish_key_reader /usr/bin/fish_key_reader\nalias g git'] |
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🛠️ Refactor suggestion
Restore edge case testing to maintain robust test coverage.
The mocked alias output was simplified to only include valid formats, removing important edge case testing that validates the robustness of the alias parsing logic.
The previous test cases likely included formats like alias_with_equal_sign=echo and invalid_alias to ensure the parser could handle real-world Fish shell output variations. Removing these tests reduces coverage for potential production scenarios.
Consider restoring edge case testing:
@pytest.fixture(autouse=True)
def Popen(self, mocker):
mock = mocker.patch('thefuck.shells.fish.Popen')
mock.return_value.stdout.read.side_effect = [(
b'cd\nfish_config\nfuck\nfunced\nfuncsave\ngrep\nhistory\nll\nls\n'
b'man\nmath\npopd\npushd\nruby'),
- b'alias fish_key_reader /usr/bin/fish_key_reader\nalias g git']
+ b'alias fish_key_reader /usr/bin/fish_key_reader\nalias g git\n'
+ b'alias_with_equal_sign=echo\ninvalid_alias\n']
return mockThen add a separate test to verify that malformed aliases are properly handled without crashing.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| b'alias fish_key_reader /usr/bin/fish_key_reader\nalias g git'] | |
| @pytest.fixture(autouse=True) | |
| def Popen(self, mocker): | |
| mock = mocker.patch('thefuck.shells.fish.Popen') | |
| mock.return_value.stdout.read.side_effect = [( | |
| b'cd\nfish_config\nfuck\nfunced\nfuncsave\ngrep\nhistory\nll\nls\n' | |
| b'man\nmath\npopd\npushd\nruby'), | |
| - b'alias fish_key_reader /usr/bin/fish_key_reader\nalias g git'] | |
| + b'alias fish_key_reader /usr/bin/fish_key_reader\nalias g git\n' | |
| + b'alias_with_equal_sign=echo\ninvalid_alias\n'] | |
| return mock |
🤖 Prompt for AI Agents
In thefuck_4/tests/shells/test_fish.py at line 19, the test was simplified by
removing edge case alias formats, which reduces coverage of the alias parsing
logic. Restore the original mocked alias output to include edge cases such as
aliases with equal signs and invalid alias lines. Additionally, add a new test
case specifically to verify that malformed aliases are handled gracefully
without causing crashes.
![blar-app[bot]](https://avatars.githubusercontent.com/in/940296?s=60&v=4){kind=small}
| alias_out = proc.stdout.read().decode('utf-8').strip().split('\n') | ||
| for alias in alias_out: | ||
| name, value = alias.replace('alias ', '', 1).split(' ', 1) |
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🔴 Error 🐛 Bug
Alias parsing fails on empty output.
Issue Explanation
proc.stdout.read().decode('utf-8').strip()returns an empty string when no aliases are defined.- Splitting the empty string on '\n' yields [''].
- Iteration yields
alias = ''. alias.replace('alias ', '', 1).split(' ', 1)on''returns [''].name, value = ...unpack raisesValueError: not enough values to unpack.- Occurs in
_get_aliasesat blarApp/open-benchmark/thefuck_4/thefuck/shells/fish.py:_get_aliases
alias_out = proc.stdout.read().decode('utf-8').strip().split('\n')
for alias in alias_out:
name, value = alias.replace('alias ', '', 1).split(' ', 1)Reply if you have any questions or let me know if I missed something.
Don't forget to react with a 👍 or 👎 to the comments made by Blar to help us improve.
| alias_out = proc.stdout.read().decode('utf-8').strip().split('\n') | ||
| for alias in alias_out: | ||
| name, value = alias.replace('alias ', '', 1).split(' ', 1) |
There was a problem hiding this comment.
🔴 Error 🐛 Bug
Parsing fails for alias definitions without space separators.
Issue Explanation
- In blarApp/open-benchmark/thefuck_4/thefuck/shells/fish.py::_get_aliases, the code uses
alias.replace('alias ', '', 1).split(' ', 1). split(' ', 1)only splits on the first space.- Definitions like
alias foo=barcontain no space between the name and value. split(' ', 1)returns a single element, causing aValueErroron unpack.- There is no fallback to use
=as a separator.
name, value = alias.replace('alias ', '', 1).split(' ', 1)Reply if you have any questions or let me know if I missed something.
Don't forget to react with a 👍 or 👎 to the comments made by Blar to help us improve.
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❕ It looks like we couldn't find any design patterns in the Wiki for this repository. Let's add some at: app.blar.io/wiki Review's done! 🚀 Check out the feedback and let me know if you need anything! – Blar |
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Did your code take a vacation? It sure skipped all the proper parsing checks—it's as if 'robust' is a foreign concept to you. Maybe spend less time coding and more time learning basic string handling. |
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TIE |
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