source/datatransform.cpp

   1 #include <msp/fs/dir.h>
   2 #include <msp/fs/stat.h>
   3 #include <msp/fs/utils.h>
   4 #include <msp/strings/format.h>
   5 #include <msp/strings/regex.h>
   6 #include "builder.h"
   7 #include "cache.h"
   8 #include "component.h"
   9 #include "datatransform.h"
  10 #include "file.h"
  11 #include "sourcepackage.h"
  12
  13 using namespace std;
  14 using namespace Msp;
  15
  16 DataTransform::DataTransform(Builder &b, const Component &c, const FS::Path &p):
  17         FileTarget(b, c.get_package(), p)
  18 {
  19         component = &c;
  20
  21         if(FS::Stat st = FS::lstat(FS::dirname(path)))
  22                 dir_mtime = st.get_modify_time();
  23 }
  24
  25 void DataTransform::find_dependencies()
  26 {
  27         list<string> files;
  28         Cache &cache = component->get_package().get_cache();
  29         const Time::TimeStamp &cache_mtime = cache.get_mtime();
  30         if(mtime<cache_mtime && dir_mtime<cache_mtime && cache.has_key(this, "files"))
  31                 files = cache.get_values(this, "files");
  32         else
  33         {
  34                 builder.get_logger().log("files", format("Reading imports from %s", path.str()));
  35                 IO::File in(path.str());
  36                 DataFile::Parser parser(in, path.str());
  37
  38                 list<string> dir_files;
  39                 while(!in.eof())
  40                 {
  41                         DataFile::Statement st = parser.parse();
  42                         if(st.keyword=="for_each")
  43                         {
  44                                 // There's bound to be at least one file: the transform itself
  45                                 if(dir_files.empty())
  46                                 {
  47                                         FS::Path dir = FS::dirname(path);
  48                                         builder.get_logger().log("files", format("Traversing %s", dir.str()));
  49                                         dir_files = list_files(dir);
  50                                 }
  51
  52                                 for(DataFile::Statement::Arguments::const_iterator i=st.args.begin(); i!=st.args.end(); ++i)
  53                                 {
  54                                         Regex re(i->get<string>());
  55                                         for(list<string>::const_iterator j=dir_files.begin(); j!=dir_files.end(); ++j)
  56                                                 if(re.match(*j))
  57                                                         files.push_back(*j);
  58                                 }
  59                         }
  60                         else if(st.keyword=="file" && st.args.size()==1)
  61                                 files.push_back(st.args.front().get<string>());
  62                 }
  63
  64                 cache.set_values(this, "files", files);
  65         }
  66
  67         for(list<string>::iterator i=files.begin(); i!=files.end(); ++i)
  68         {
  69                 FS::Path file_path = FS::dirname(path)/ *i;
  70                 if(Target *tgt = builder.get_vfs().get_target(file_path))
  71                         add_transitive_dependency(*tgt);
  72                 else
  73                         add_transitive_dependency(*new File(builder, *package, file_path));
  74         }
  75 }