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# ==== Purpose ==== # # Grep for a pattern in a file in a portable manner. # # WARNING: Use include/assert_grep.inc instead, if at all possible. # That allows you to assert the property being tested in a much more # precise way. It also does not depend on the result file, so your # test becomes more readable/maintainable. It also produces better # debug output if the test fails. # # ==== Usage ==== # # --let $grep_pattern= PERL_REGEX # --let $grep_file= FILENAME # [--let $grep_output= print_each | print_count | boolean] # # Parameters: # # $grep_pattern # The pattern to search for. This can be a perl regex. # # $grep_file # The file to search in. # # $grep_output # The format of the output. Can be one of: # - print_each: prints each line, and a count. # - print_count: print just a count. # - boolean: print only whether something was found or not. # If this is not specified, print_each is used. #--let $include_filename= grep_pattern.inc #--source include/begin_include_file.inc if ($grep_output) { --let _GP_GREP_OUTPUT= $grep_output } if (!$grep_output) { --let _GP_GREP_OUTPUT= print_each } --let _GP_GREP_PATTERN= $grep_pattern --let _GP_GREP_FILE= $grep_file --perl use strict; my $file= $ENV{'_GP_GREP_FILE'} or die "grep_file is not set"; my $pattern= $ENV{'_GP_GREP_PATTERN'} or die "grep_pattern is not set"; open(FILE, "$file") or die("Unable to open $file: $!\n"); my $count = 0; my $output = $ENV{'_GP_GREP_OUTPUT'}; if ($output eq 'print_each') { print "Matching lines are:\n"; } while (<FILE>) { my $line = $_; if ($line =~ /$pattern/) { if ($output eq 'print_each') { print $line; } $count++; if ($output eq 'boolean') { last; } } } if ($count == 0 && $output eq 'print_each') { print "None\n"; } if ($output eq 'boolean') { print $count ? "Pattern found.\n" : "Pattern not found.\n"; } else { print "Occurrences of '$pattern' in the input file: $count\n"; } close(FILE) or die "Error closing $file: $!"; EOF #--source include/end_include_file.inc