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Fix stupid bug with ignore-case

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This commit is contained in:
Nicolo P 2022-02-16 09:47:56 +01:00
parent 3a75db3b49
commit d0dd2cff17
3 changed files with 27 additions and 34 deletions
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21
README.md
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@ -6,20 +6,21 @@ Then this is for you...
## What is this?
`crapgrep` is a poor imitation of the Unix utility `grep` written in Python.
`crapgrep` is a poor imitation of the Unix utility `grep`, written in Python.
More specifically, it's a command line tool to search for a pattern or a substring in each line of one or more text files.
The command synopsis is very similar to `grep`, although it needs the Python interpreter to be invoked explicitly (at the moment, at least):
The command synopsis is very similar to `grep`'s, although it needs the Python interpreter to be invoked explicitly (at the moment, at least):
```
python crapgrep.py [OPTIONS] [PATTERN] [FILE[...]]
python crapgrep.py [OPTION...] [PATTERN] [FILE...]
```
_**Note**: obviously, `crapgrep` doesn't read from `stdin`, which makes it even more useless..._
> _**Note**: obviously, `crapgrep` doesn't read from `stdin`, which makes it even more useless..._
## Installation
If you like wasting time because apparently you have nothing better to do, you can try `crapgrep` by cloning the repository with `git`:
If you like wasting time (because apparently you have nothing better to do), you can try `crapgrep` by cloning the repository with `git`:
```bash
git clone https://baltig.cnr.it/nicolo.paraciani/crapgrep.git
@ -28,8 +29,8 @@ git clone https://baltig.cnr.it/nicolo.paraciani/crapgrep.git
then
```bash
cd crapgrep
python crapgrep.py <option> <file(s)>
cd crapgrep/crapgrep
python crapgrep.py <options> <files>
```
## Examples
@ -44,15 +45,15 @@ Searching for the simple string `'hola'` in file `garbage.txt` in the current di
python crapgrep.py hola garbage.txt
```
To make the search case-insensitive, you could do:
To make the search case-insensitive:
```
python crapgrep.py -i hOlA garbage.txt
python crapgrep.py -i hola garbage.txt
```
### Regexp
_**Note**: unlike `grep`, `crapgrep` doesn't treat the string as a regular expression pattern by default, it must be specified by passing the `-E` option explicitly._
_**Note**: unlike `grep`, `crapgrep` doesn't treat the pattern as a regular expression by default, it must be specified by passing the `-E` option explicitly._
Searching for pattern `'^urka[0-9]'` in files `garbage1.txt` and `garbage2.txt` in the parent directory:

36
crapgrep/crapgrep.py
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@ -2,11 +2,9 @@ import exceptions
import re
import os
import sys
import sty
# TODO Avoid extra fname argument??
def find_line(line: str, pattern: str, is_regexp=False) -> bool:
def find_line(line: str, pattern: str, i_case: bool, is_regexp=False) -> bool:
"""
Distinguish between regexp or not (default is False)
"""
@ -16,6 +14,9 @@ def find_line(line: str, pattern: str, is_regexp=False) -> bool:
if is_regexp:
matches = re.findall(pattern, line)
FIND_COND = len(matches) > 0
elif i_case:
lower = line.lower()
FIND_COND = lower.find(pattern.lower()) != -1
else:
FIND_COND = line.find(pattern) != -1
@ -93,7 +94,7 @@ def parse_args(args: list) -> dict:
# TODO does it make sense?
for opt in options:
if opt not in OPTS:
raise exceptions.InvalidOption(opt[1:])
raise exceptions.InvalidOptionError(opt)
args_tree["options"] = options
@ -113,22 +114,13 @@ def parse_args(args: list) -> dict:
return args_tree
def match_regexp(pattern: str, line: str) -> object:
"""
Search for pattern in the given line and return
a match object or None if no match found.
Flags??
"""
return re.search(pattern, line)
def process_grep(args_tree: dict) -> list:
lines = []
found_lines = []
options = args_tree["options"]
pattern = args_tree["pattern"]
files = args_tree["files"]
i_case = False
try:
for f in files:
@ -139,19 +131,19 @@ def process_grep(args_tree: dict) -> list:
n = 0
# Check if case insensitive
if 'i' in options:
pattern = pattern.lower()
for line in lines:
n = n + 1
# Check if case insensitive
if 'i' in options:
i_case = True
# Check if regexp flag
if 'E' in options:
# pattern is regexp
if not check_pattern(pattern):
raise exceptions.InvalidPattern(pattern)
found = find_line(line, pattern, True)
raise exceptions.InvalidPatternError(pattern)
found = find_line(line, pattern, i_case, True)
else:
found = find_line(line, pattern)
found = find_line(line, pattern, i_case)
lnum = str(n) + ':' if 'n' in options else ''
@ -175,7 +167,7 @@ if __name__ == "__main__":
try:
args_tree = parse_args(args)
except exceptions.InvalidOption as e:
except exceptions.InvalidOptionError as e:
print(e.get_message())
print_usage()
sys.exit(1)
@ -183,6 +175,6 @@ if __name__ == "__main__":
try:
for line in process_grep(args_tree):
print(line)
except exceptions.InvalidPattern as e:
except exceptions.InvalidPatternError as e:
print(e.get_message())
sys.exit(1)

4
crapgrep/exceptions.py
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@ -1,4 +1,4 @@
class InvalidOption(Exception):
class InvalidOptionError(Exception):
def __init__(self, invalid_opt):
self.invalid_opt = invalid_opt
@ -6,7 +6,7 @@ class InvalidOption(Exception):
return f"crapgrep: invalid option -- '{self.invalid_opt}'"
class InvalidPattern(Exception):
class InvalidPatternError(Exception):
def __init__(self, pattern):
self.invalid = pattern