util/Decompressor.java

   1
   2 package org.de.metux.util;
   3
   4 import java.io.*;
   5 import java.net.*;
   6
   7
   8 public class Decompressor
   9 {
  10     public boolean decompress(String archive, String target)
  11     {
  12         return decompress(archive,target,null);
  13     }
  14
  15     public boolean decompress(String archive, String target, String format)
  16     {
  17         if ((format==null) || (format.length()==0))
  18         {
  19             /* try to detect format */
  20
  21
  22
  23     {
  24         String buildroot = config.cf_get_str_n("@@buildroot");
  25         String archiver = config.cf_get_str("archiver");
  26         if (archiver.length()==0)
  27         {
  28             notice("no archiver given ... trying to detect" );
  29             if (source.endsWith(".tar.gz") ||
  30                 source.endsWith(".tgz"))
  31                 config.cf_set("archiver", archiver = "tar.gz");
  32             else if (source.endsWith(".tar.bz2") ||
  33                      source.endsWith(".tbz") ||
  34                      source.endsWith(".tbz2"))
  35                 config.cf_set("archiver", archiver = "tar.bz");
  36             else
  37                 return error("cannot detect proper archiver for \""+source+"\"");
  38         }
  39
  40         if (!mkdir(buildroot))
  41             return false;
  42
  43         if (archiver.equals("tar.bz2"))
  44         {
  45             notice("decompressing tar.bz2: "+source+" ..." );
  46             return exec ( "cd "+buildroot+" && tar -xjf "+source );
  47         }
  48
  49         if (archiver.equals("tar.gz"))
  50         {
  51             notice("decompressing tar.gz: "+source+" ..." );
  52             return exec ( "cd "+buildroot+" && tar -xzf "+source );
  53         }
  54
  55         return error("unsupported archiver: "+archiver );
  56     }
  57
  58     /* pre-execute something *before* we start decompressing
  59        ie. for preparing patch sets */
  60
  61     boolean preexec()
  62     {
  63         /* prepare patches */
  64         String preexec=config.cf_get_str_n("prebuild-patch-preexec");
  65         if (preexec==null)
  66             return true;
  67
  68         notice("Calling preexec: "+preexec);
  69         if (!exec(preexec))
  70             return error("preexec failed");
  71
  72         return true;
  73     }
  74
  75     boolean cleanup()
  76     {
  77         String buildroot = config.cf_get_str_n("@@buildroot");
  78         notice("cleaning up "+buildroot );
  79         rm.remove_recursive(buildroot);
  80         mkdir(buildroot);
  81         return true;
  82     }
  83
  84     boolean paranoia_check()
  85     {
  86         /* check for proper buildroot variable ... probably not really necessary */
  87         String buildroot = config.cf_get_str("@@buildroot");
  88         try
  89         {
  90             buildroot = new File(buildroot).getCanonicalPath();
  91         }
  92         catch (IOException e)
  93         {
  94             return error("exception: "+e);
  95         }
  96
  97         if (buildroot.length()<5)
  98             return error("corrupt @@buildroot variable - internal problem ?");
  99
 100         /* -- get the source file name / uri -- */
 101         String source=config.cf_get_str_n("source-file");
 102         if (source==null)
 103             return error("missing package source option in configuration");
 104
 105         return true;
 106     }
 107
 108     boolean decompress()
 109     {
 110         /* now run decompression */
 111         String srclist[] = config.cf_get_list("source-file");
 112         if (srclist.length==0)
 113             return error("missing package source option in configuration");
 114
 115         for (int x=0; x<srclist.length; x++)
 116             if (!decompress_archive(srclist[x]))
 117                 return false;
 118
 119         return true;
 120     }
 121
 122     boolean prepare_sourcetree()
 123     {
 124         return
 125         (       /* hope we've got shortcut evaluation! */
 126             paranoia_check()    &&
 127             preexec()           &&
 128             cleanup()           &&
 129             decompress()        &&
 130             lookup_srcdir()     &&
 131             apply_patches()
 132         );
 133     }
 134
 135     /* right after decompression, we need to know our actual srcroot */
 136     boolean lookup_srcdir()
 137     {
 138         String buildroot = config.cf_get_str_n("@@buildroot");
 139         if (buildroot==null)
 140             return error("lookup_srcdir: Internal error: @@buildroot not defined");
 141
 142         File handle = new File(buildroot);
 143         String sublist[] = handle.list();
 144
 145         if (sublist==null)
 146             return error("could not get directory listing!");
 147
 148         if (sublist.length==0)
 149             return error("no srcdir found. seems like decompression failed");
 150
 151         if (sublist.length>1)
 152             return error("more than one srcdir found. looks like trouble");
 153
 154         notice("srcdir is: "+sublist[0]);
 155
 156         String srcroot = buildroot+"/"+sublist[0];
 157         notice("srcroot is: "+srcroot);
 158
 159         config.cf_set("@@srcroot", srcroot);
 160
 161         return true;
 162     }
 163
 164     boolean apply_patches()
 165     {
 166         String patches[]  = config.cf_get_list("prebuild-patch-file");
 167         String patch_opts = config.cf_get_str("prebuild-patch-opts");
 168         String srcroot    = config.cf_get_str_n("@@srcroot");
 169
 170         if (patches.length==0)
 171             return true;
 172
 173         for (int x=0; x<patches.length; x++)
 174         {
 175             if (!(new File(patches[x]).exists()))
 176                 return error("could not load patch file: "+patches[x]);
 177
 178             notice("applying patch: "+patches[x]+"("+patch_opts+")" );
 179             if (!exec("cd "+srcroot+";pwd;patch "+patch_opts+"<"+patches[x]))
 180                 return false;
 181         }
 182
 183         return true;
 184     }
 185 }