single_quote.pl

#!/usr/bin/perl

# Script to (generate a script to) fix excess use of double-quotes in HAML.                                            
# To use:                                                                                                              
#                                                                                                                      
# haml-lint app/views/ > haml_errors                                                                                   
# grep "you don't need string interpolation" haml_errors | awk '{print $1}' > single_quote_me                          
# perl single_quote.pl                                                                                                 
# bash fixme.sh                                                                                                        
# git commit -a -m "Use single-quotes in straightforward cases"                                                        
#                                                                                                                      
# This should fix all the "easy" cases (only one string per line). Eyeball the                                         
# file problem_lines, delete any cases where string interpolation is used,                                             
# and save it. Then run                                               
#                                                                                                                      
# awk '{print $1}' problem_lines > single_quote_me                                                                     
# perl single_quote.pl -f                                                                                              
# bash fixme.sh                                                                        
# git commit -a -m "Use single-quotes in slightly harder cases"                                                        
#                                                                                                           
# Now fix the remaining hard cases by hand.                                                                
                                                                                                           
open my $fixups, "<", "single_quote_me";                                                                               
open my $problem_lines, ">", "problem_lines";                                                                          
open my $gen_script, ">", "fixme.sh";                                                                                  
                                                                                                                       
my $force = ($ARGV[0] eq "-f");                                                                                        
                                                                                                                       
print $gen_script "#!/bin/sh\n\n";                                                                                     
                                                                                                                       
for my $fixup (<$fixups>) {                                                                                            
    chomp $fixup;                                                                                                      
    my ($file, $line_num) = split(/:/, $fixup);                                                                        
    open my $fh, "<", $file;                                                                                           
    my @lines = <$fh>;                                                                                                 
    my $line =  $lines[$line_num - 1];                                                                                 
    my @quotes = ($line =~ /"/g);                                                                                      
    if ($force || (scalar(@quotes) <= 2)) {                                                                            
        my $sed = 'sed -i '' "' . $line_num . ' s/\"/\'/g"' . " $file\n";                                                 
        print $gen_script $sed;                                                                                        
    } else {                                                                                                           
        print $problem_lines "$fixup $line";                                                                           
    }                                                                                                                  
}

Modified to add '' for os x