1 | # ------------------------------------------------------------------------------ |
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2 | # NAME |
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3 | # Fcm::SrcDirLayer |
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4 | # |
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5 | # DESCRIPTION |
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6 | # This class contains methods to manipulate the extract of a source |
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7 | # directory from a branch of a (Subversion) repository. |
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8 | # |
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9 | # COPYRIGHT |
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10 | # (C) Crown copyright Met Office. All rights reserved. |
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11 | # For further details please refer to the file COPYRIGHT.txt |
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12 | # which you should have received as part of this distribution. |
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13 | # ------------------------------------------------------------------------------ |
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14 | use warnings; |
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15 | use strict; |
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16 | |
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17 | package Fcm::SrcDirLayer; |
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18 | use base qw{Fcm::Base}; |
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19 | |
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20 | use Fcm::Util qw{run_command e_report w_report}; |
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21 | use File::Basename qw{dirname}; |
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22 | use File::Path qw{mkpath}; |
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23 | use File::Spec; |
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24 | |
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25 | # List of property methods for this class |
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26 | my @scalar_properties = ( |
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27 | 'cachedir', # cache directory for this directory branch |
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28 | 'commit', # revision at which the source directory was changed |
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29 | 'extracted', # is this branch already extracted? |
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30 | 'files', # list of source files in this directory branch |
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31 | 'location', # location of the source directory in the branch |
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32 | 'name', # sub-package name of the source directory |
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33 | 'package', # top level package name of which the current repository belongs |
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34 | 'reposroot', # repository root URL |
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35 | 'revision', # revision of the repository branch |
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36 | 'tag', # package/revision tag of the current repository branch |
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37 | 'type', # type of the repository branch ("svn" or "user") |
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38 | ); |
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39 | |
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40 | my %ERR_MESS_OF = ( |
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41 | CACHE_WRITE => '%s: cannot write to cache', |
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42 | SYMLINK => '%s/%s: ignore symbolic link', |
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43 | VC_TYPE => '%s: repository type not supported', |
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44 | ); |
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45 | |
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46 | # ------------------------------------------------------------------------------ |
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47 | # SYNOPSIS |
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48 | # $obj = Fcm::SrcDirLayer->new (%args); |
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49 | # |
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50 | # DESCRIPTION |
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51 | # This method constructs a new instance of the Fcm::SrcDirLayer class. See |
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52 | # above for allowed list of properties. (KEYS should be in uppercase.) |
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53 | # ------------------------------------------------------------------------------ |
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54 | |
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55 | sub new { |
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56 | my $this = shift; |
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57 | my %args = @_; |
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58 | my $class = ref $this || $this; |
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59 | |
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60 | my $self = Fcm::Base->new (%args); |
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61 | |
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62 | for (@scalar_properties) { |
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63 | $self->{$_} = exists $args{uc ($_)} ? $args{uc ($_)} : undef; |
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64 | } |
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65 | |
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66 | bless $self, $class; |
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67 | return $self; |
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68 | } |
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69 | |
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70 | # ------------------------------------------------------------------------------ |
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71 | # SYNOPSIS |
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72 | # $value = $obj->X; |
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73 | # $obj->X ($value); |
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74 | # |
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75 | # DESCRIPTION |
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76 | # Details of these properties are explained in @scalar_properties. |
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77 | # ------------------------------------------------------------------------------ |
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78 | |
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79 | for my $name (@scalar_properties) { |
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80 | no strict 'refs'; |
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81 | |
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82 | *$name = sub { |
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83 | my $self = shift; |
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84 | |
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85 | # Argument specified, set property to specified argument |
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86 | if (@_) { |
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87 | $self->{$name} = $_[0]; |
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88 | } |
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89 | |
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90 | # Default value for property |
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91 | if (not defined $self->{$name}) { |
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92 | if ($name eq 'files') { |
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93 | # Reference to an array |
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94 | $self->{$name} = []; |
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95 | } |
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96 | } |
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97 | |
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98 | return $self->{$name}; |
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99 | } |
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100 | } |
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101 | |
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102 | # Handles error/warning events. |
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103 | sub _err { |
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104 | my ($key, $args_ref, $warn_only) = @_; |
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105 | my $reporter = $warn_only ? \&w_report : \&e_report; |
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106 | $args_ref ||= []; |
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107 | $reporter->(sprintf($ERR_MESS_OF{$key} . ".\n", @{$args_ref})); |
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108 | } |
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109 | |
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110 | # ------------------------------------------------------------------------------ |
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111 | # SYNOPSIS |
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112 | # $dir = $obj->localdir; |
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113 | # |
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114 | # DESCRIPTION |
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115 | # This method returns the user or cache directory for the current revision |
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116 | # of the repository branch. |
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117 | # ------------------------------------------------------------------------------ |
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118 | |
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119 | sub localdir { |
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120 | my $self = shift; |
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121 | |
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122 | return $self->user ? $self->location : $self->cachedir; |
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123 | } |
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124 | |
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125 | # ------------------------------------------------------------------------------ |
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126 | # SYNOPSIS |
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127 | # $user = $obj->user; |
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128 | # |
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129 | # DESCRIPTION |
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130 | # This method returns the string "user" if the current source directory |
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131 | # branch is a local directory. Otherwise, it returns "undef". |
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132 | # ------------------------------------------------------------------------------ |
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133 | |
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134 | sub user { |
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135 | my $self = shift; |
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136 | |
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137 | return $self->type eq 'user' ? 'user' : undef; |
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138 | } |
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139 | |
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140 | # ------------------------------------------------------------------------------ |
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141 | # SYNOPSIS |
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142 | # $rev = $obj->get_commit; |
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143 | # |
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144 | # DESCRIPTION |
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145 | # If the current repository type is "svn", this method attempts to obtain |
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146 | # the revision in which the branch is last committed. On a successful |
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147 | # operation, it returns this revision number. Otherwise, it returns |
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148 | # "undef". |
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149 | # ------------------------------------------------------------------------------ |
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150 | |
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151 | sub get_commit { |
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152 | my $self = shift; |
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153 | |
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154 | if ($self->type eq 'svn') { |
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155 | # Execute the "svn info" command |
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156 | my @lines = &run_command ( |
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157 | [qw/svn info -r/, $self->revision, $self->location . '@' . $self->revision], |
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158 | METHOD => 'qx', TIME => $self->config->verbose > 2, |
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159 | ); |
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160 | |
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161 | my $rev; |
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162 | for (@lines) { |
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163 | if (/^Last\s+Changed\s+Rev\s*:\s*(\d+)/i) { |
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164 | $rev = $1; |
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165 | last; |
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166 | } |
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167 | } |
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168 | |
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169 | # Commit revision of this source directory |
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170 | $self->commit ($rev); |
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171 | |
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172 | return $self->commit; |
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173 | |
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174 | } elsif ($self->type eq 'user') { |
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175 | return; |
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176 | |
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177 | } else { |
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178 | _err('VC_TYPE', [$self->type()]); |
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179 | } |
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180 | } |
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181 | |
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182 | # ------------------------------------------------------------------------------ |
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183 | # SYNOPSIS |
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184 | # $rc = $obj->update_cache; |
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185 | # |
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186 | # DESCRIPTION |
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187 | # If the current repository type is "svn", this method attempts to extract |
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188 | # the current revision source directory from the current branch from the |
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189 | # repository, sending the output to the cache directory. It returns true on |
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190 | # a successful operation, or false if the repository is not of type "svn". |
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191 | # ------------------------------------------------------------------------------ |
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192 | |
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193 | sub update_cache { |
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194 | my $self = shift; |
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195 | |
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196 | return unless $self->cachedir; |
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197 | |
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198 | # Create cache extract destination, if necessary |
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199 | my $dirname = dirname $self->cachedir; |
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200 | mkpath($dirname); |
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201 | |
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202 | if (!-w $dirname) { |
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203 | _err('CACHE_WRITE', [$dirname]); |
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204 | } |
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205 | |
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206 | if ($self->type eq 'svn') { |
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207 | # Set up the extract command, "svn export --force -q -N" |
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208 | my @command = ( |
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209 | qw/svn export --force -q -N/, |
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210 | $self->location . '@' . $self->revision, |
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211 | $self->cachedir, |
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212 | ); |
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213 | |
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214 | &run_command (\@command, TIME => $self->config->verbose > 2); |
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215 | |
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216 | } elsif ($self->type eq 'user') { |
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217 | return; |
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218 | |
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219 | } else { |
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220 | _err('VC_TYPE', [$self->type()]); |
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221 | } |
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222 | |
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223 | return 1; |
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224 | } |
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225 | |
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226 | # ------------------------------------------------------------------------------ |
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227 | # SYNOPSIS |
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228 | # @files = $obj->get_files(); |
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229 | # |
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230 | # DESCRIPTION |
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231 | # This method returns a list of file base names in the (cache of) this source |
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232 | # directory in the current branch. |
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233 | # ------------------------------------------------------------------------------ |
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234 | |
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235 | sub get_files { |
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236 | my ($self) = @_; |
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237 | opendir(my $dir, $self->localdir()) |
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238 | || die($self->localdir(), ': cannot read directory'); |
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239 | my @base_names = (); |
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240 | BASE_NAME: |
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241 | while (my $base_name = readdir($dir)) { |
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242 | if ($base_name =~ qr{\A\.}xms || $base_name =~ qr{~\z}xms) { |
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243 | next BASE_NAME; |
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244 | } |
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245 | my $path = File::Spec->catfile($self->localdir(), $base_name); |
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246 | if (-d $path) { |
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247 | next BASE_NAME; |
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248 | } |
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249 | if (-l $path) { |
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250 | _err('SYMLINK', [$self->location(), $base_name], 1); |
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251 | next BASE_NAME; |
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252 | } |
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253 | push(@base_names, $base_name); |
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254 | } |
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255 | closedir($dir); |
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256 | $self->files(\@base_names); |
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257 | return @base_names; |
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258 | } |
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259 | |
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260 | # ------------------------------------------------------------------------------ |
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261 | |
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262 | 1; |
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263 | |
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264 | __END__ |
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