1 | package gdbdiff;
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2 |
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3 | BEGIN {
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4 | die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
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5 | die "GSDLOS not set\n" unless defined $ENV{'GSDLOS'};
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6 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib");
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7 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib/cpan");
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8 | }
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9 |
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10 | use util;
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11 | use diffutil;
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12 | use Text::Diff;
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13 | use Cwd;
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14 |
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15 | if ($^O =~ m/mswin/i) {
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16 | require Win32; # for working out Windows Long Filenames from Win 8.3 short filenames
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17 | }
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18 |
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19 | sub readin_gdb
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20 | {
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21 | my ($cmd) = @_;
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22 |
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23 | open(PIN,"$cmd|")
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24 | || die "Unable to open pipe to $cmd: $!\n";
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25 |
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26 | my $text_content = "";
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27 |
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28 | while (defined (my $line = <PIN>)) {
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29 | $text_content .= $line;
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30 | }
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31 |
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32 | close(PIN);
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33 | return $text_content;
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34 | }
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35 |
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36 | # for debugging. Prints txt contents of db to file
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37 | sub print_string_to_file
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38 | {
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39 | my ($text, $outfile) = @_;
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40 |
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41 | open(FOUT, ">$outfile") or die "ERROR failed to write to $outfile: $!\n";
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42 | print FOUT $text;
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43 | close(FOUT);
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44 | }
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45 |
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46 | sub test_gdb
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47 | {
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48 | my ($full_modeldb, $full_testdb,$strColName) = @_;
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49 |
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50 | # print "Now is testing database\n";
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51 | my ($dbname, $dirname, $suffix)= &File::Basename::fileparse($full_testdb, "\\.[^\\.]+\$");
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52 |
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53 | # need to sort text output of both test and model col database files, to normalise them for the comparison
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54 | # the -sort option to db2txt was added specifically to support diffcol
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55 | my $model_cmd = "db2txt -sort $full_modeldb 2>&1";
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56 | my $test_cmd = "db2txt -sort $full_testdb 2>&1";
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57 |
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58 | my $model_text = readin_gdb($model_cmd);
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59 | my $test_text = readin_gdb($test_cmd);
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60 |
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61 | # my $savepath = &getcwd."/../"; # TASK_HOME env does not exist at this stage, but it's one level up from current directory
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62 | # print_string_to_file($test_text, $savepath.$dbname."_test.out");
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63 | # print_string_to_file($model_text, $savepath.$dbname."_model.out");
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64 |
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65 | # filter out the fields that can be ignored in the two database files
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66 | # The total_numbytes field can vary depending on how many backslashes exist in the urls in the main body text, as each
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67 | # of these windows slashes get escaped with another backslash, and the resulting string is used as key into rel link db
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68 | my $ignore_line_re = "\n<(lastmodified|lastmodifieddate|oailastmodified|oailastmodifieddate|total_numbytes)>([^\n])*";
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69 | $model_text =~ s/$ignore_line_re//g;
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70 | $test_text =~ s/$ignore_line_re//g;
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71 |
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72 |
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73 | # if the OS doesn't match and one of them is windows, extra work needs to be done to bring the db files
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74 | # in test and model collection to an even base for comparison
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75 |
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76 | my $testIsWin = &isDBWindowsSensitive($dbname, $test_text);
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77 | my $modelIsWin = &isDBWindowsSensitive($dbname, $model_text);
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78 |
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79 | if($testIsWin == $modelIsWin) { # both linux or both windows, do the basic test we did on linux machines:
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80 | # ignore absolute path prefixes in modelcol and testcol (necessary for archiveinf-doc and -src.gdb files)
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81 |
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82 | # Remember the original model col on SVN could have been built anywhere,
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83 | # and in the gdb files, absolute paths are stored to the collection location.
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84 | # Crop these paths to the collect/<colname> point.
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85 |
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86 | # Entries are of the form [Entry] or <Entry>. In order to do a sensible diff,
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87 | # need to remove the prefix to the collect/colname folder in any (absolute) path that occurs in Entry
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88 | # E.g. [/full/path/collect/colname/import/file.ext] should become [collect/colname/import/file.ext]
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89 | # Better regex is of the form /BEGIN((?:(?!BEGIN).)*)END/, see http://docstore.mik.ua/orelly/perl/cookbook/ch06_16.htm
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90 |
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91 | $model_text =~ s@^([^\\//]*).*(\\|/)(collect(\\|/)$strColName)(.*)$@$1$3$5@mg;
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92 | $test_text =~ s@^([^\\//]*).*(\\|/)(collect(\\|/)$strColName)(.*)$@$1$3$5@mg;
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93 | }
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94 |
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95 | else { # one of the collections was built on windows
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96 | # handling slashes and other differences between a model coll built on one OS (e.g. linux)
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97 | # and a test collection built and diffed on another OS (windows)
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98 |
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99 | my ($win_text, $lin_text); # references
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100 | if($testIsWin) {
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101 | $win_text = \$test_text;
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102 | $lin_text = \$model_text;
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103 | } else {
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104 | $win_text = \$model_text;
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105 | $lin_text = \$test_text;
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106 | }
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107 |
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108 | if($dbname =~ m/archiveinf-doc/) {
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109 | my $tmp = ""; # rebuild windows file's set of lines after processing them one by one
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110 |
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111 | # convert short filenames to long perl:
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112 | # http://www.mombu.com/programming/perl/t-convert-dos-83-filenames-to-win32-long-filenames-using-perl-525448.html
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113 | for my $line (split /^/, $$win_text) { # split the string into newlines
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114 |
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115 | if($line =~ m@^<assoc-file>(.*)(\s+)@s) {
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116 | $line = $1; # may be a short file name
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117 | # perhaps test here if it is a shortfilename? should match /CAPS....~number(.ext)/
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118 |
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119 | $line = "<assoc-file>".&Win32::GetLongPathName($line)."$2"; # make it a long file name and prefix assoc-file to it again
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120 | }
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121 | $tmp .= $line;
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122 | }
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123 | $$win_text = $tmp;
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124 | }
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125 |
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126 | # slashes in windows text need to be turned into linux style slashes
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127 | $$win_text =~ s@\\@/@g;
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128 |
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129 | # cut down absolute paths to files to just collect/colname/.../file, same as before
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130 | $$lin_text =~ s@^([^\\//]*).*(\\|/)(collect(\\|/)$strColName)(.*)$@$1$3$5@mg;
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131 | $$win_text =~ s@^([^\\//]*).*(\\|/)(collect(\\|/)$strColName)(.*)$@$1$3$5@mg;
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132 |
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133 | # for the windows text, need to further get rid of the driveletter after [ or <meta>
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134 | $$win_text =~ s@^(\[|<[^>]*>)[a-zA-Z]:collect@$1collect@mg;
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135 |
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136 | } # end of equalising differences between a windows collection's db file and linux coll's db file
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137 |
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138 | # now can go back to using $model_text and $test_text
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139 | # print_string_to_file($test_text, $savepath.$dbname."_test.out");
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140 | # print_string_to_file($model_text, $savepath.$dbname."_model.out");
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141 |
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142 | my $report_type = "OldStyle"; # Can not change this type.
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143 | my $diff_gdb = diff \$model_text, \$test_text, { STYLE => $report_type };
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144 |
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145 | # leaving the ignore regex as it used to be in the following, in case it helps with single line comparisons
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146 | $diff_gdb = &diffutil::GenerateOutput($diff_gdb,"^<(lastmodified|lastmodifieddate|oailastmodified|oailastmodifieddate)>.*");
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147 |
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148 | if($diff_gdb eq "")
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149 | {
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150 | return "";
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151 | }
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152 | else
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153 | {
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154 | return "Difference Report: Differences found in the Database file: \n$diff_gdb";
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155 | }
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156 | # Call diff?
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157 | }
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158 |
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159 | # returns true if the contents are windows AND it matters for the diffing on the db that it's windows
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160 | # For col.gdb it does not seem to matter so far, if it is generated on a windows machine and to be compared to a linux-generated col.gdb
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161 | sub isDBWindowsSensitive
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162 | {
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163 | my ($dbtailname, $db_contents) = @_; # db filename without suffix
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164 |
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165 | if($dbtailname !~ m/archiveinf/) { # only archiveinf-doc and archive-inf source need special Windows processing, not col.gdb
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166 | return 0;
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167 | }
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168 | return ($db_contents =~ m/\\/) ? 1 : 0; # windows slashes detected. Better test would be: [Something\something] OR <tag>something\something
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169 | # for doc.xml:
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170 | # <Metadata name="gsdlsourcefilename">import/html_files/cleves.html</Metadata>
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171 | }
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172 |
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173 | 1;
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