FreeCalypso > hg > leo2moko-debug

annotate g23m/system/busyb/tools/verify_target_file.pl @ 5:24178d4b7d2e

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removing files which are to be regenerated
author Space Falcon <falcon@ivan.Harhan.ORG>
date Mon, 01 Jun 2015 06:41:11 +0000
parents 509db1a7b7b8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #
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2 # verify_target_file.pl
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3 #
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4 # tool to check for make-like dependency
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5 #
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6 # format: verify_target_file.pl temp-file other-dest-file-index other-command other-parameters
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7 #
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8 # the intention of this command is to modify conditionally a file, as would it
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9 # have done by make. since there is no date information, the tool uses the
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10 # content of the file.
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11 #
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12 # the behaviour of this script is somehow specific:
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13 # - it expects that other-dest-file-index decribes which parameter of
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14 # other-parameters describes the file to be generated. first parameter is
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15 # described with 0 etc. other-command is a perl script and will be invoked
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16 # with "do".
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17 # - it invokes other-command, but replaces the first parameter with temp-file
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18 # - it then verifies temp-file against the expected result file (the first
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19 # parameter). if this file does not exist or is different to temp-file,
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20 # temp-file is renamed to the first parameter. otherwise (file exists and
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21 # its content is equal to the content of temp-file), only the temp-file is
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22 # removed.
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23 # - since the file is already so special, it brings its own comparison tool,
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24 # that way there is no need to install anything else, that tool compares
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25 # text files
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26 #
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27 # IMPORTANT:
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28 # since the used rename does not rename over file system boundaries (at least
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29 # it is not promised), choose your temp-file accordingly
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30 #
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31
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32 use strict;
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33 #use warnings;
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34
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35 my $temp_file = shift;
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36 my $other_dest_file_index = shift;
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37 my $other_command = shift;
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38 my $other_dest_file = $ARGV[$other_dest_file_index];
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39
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40 # modify command_line
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41 $ARGV[$other_dest_file_index] = $temp_file;
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42
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43 my $result = do $other_command;
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44
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45 if ((! defined $result) && ($! || $@))
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46 {
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47 die "system $other_command failed: $!\n$@";
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48 }
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49
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50 if (! -e $temp_file)
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51 {
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52 #something unexpected occured
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53 die "$temp_file should have been generated";
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54 }
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55
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56 if (( ! -e $other_dest_file ) ||
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57 compare_files($other_dest_file, $temp_file) == 0)
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58 {
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59 unlink $other_dest_file;
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60 rename $temp_file, $other_dest_file;
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61 }
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62 else
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63 {
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64 unlink $temp_file;
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65 }
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66
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67 sub get_contents_of_file
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68 {
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69 my ($filename) = @_;
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70
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71 open(FILE, "<$filename") or die "open failed: $filename";
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72 my @lines = <FILE>;
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73 my $text = join '', @lines;
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74 close FILE;
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75
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76 $text
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77 }
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78
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79 sub compare_files
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80 {
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81 my ($file1, $file2) = @_;
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82
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83 get_contents_of_file($file1) eq get_contents_of_file($file2)
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84 }
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85