source/lib/filetarget.cpp

   1 #include <msp/core/algorithm.h>
   2 #include <msp/fs/stat.h>
   3 #include <msp/fs/utils.h>
   4 #include <msp/strings/format.h>
   5 #include <msp/strings/utils.h>
   6 #include <msp/time/utils.h>
   7 #include "builder.h"
   8 #include "filetarget.h"
   9 #include "sourcepackage.h"
  10 #include "task.h"
  11 #include "tool.h"
  12
  13 using namespace std;
  14 using namespace Msp;
  15
  16 FileTarget::FileTarget(Builder &b, const FS::Path &a):
  17         FileTarget(b, 0, a)
  18 { }
  19
  20 FileTarget::FileTarget(Builder &b, const SourcePackage &p, const FS::Path &a):
  21         FileTarget(b, &p, a)
  22 { }
  23
  24 FileTarget::FileTarget(Builder &b, const SourcePackage *p, const FS::Path &a):
  25         Target(b, generate_name(b, p, a)),
  26         path(a)
  27 {
  28         package = p;
  29
  30         builder.get_vfs().register_path(path, this);
  31
  32         stat();
  33 }
  34
  35 void FileTarget::stat()
  36 {
  37         if(FS::Stat st = FS::lstat(path))
  38         {
  39                 mtime = st.get_modify_time();
  40                 size = st.get_size();
  41         }
  42 }
  43
  44 string FileTarget::generate_name(Builder &builder, const SourcePackage *pkg, const FS::Path &path)
  45 {
  46         if(pkg && FS::descendant_depth(path, pkg->get_source_directory())>=0)
  47         {
  48                 FS::Path relpath = FS::relative(path, pkg->get_source_directory());
  49                 return format("<%s>%s", pkg->get_name(), relpath.str().substr(1));
  50         }
  51         else if(FS::descendant_depth(path, builder.get_prefix())>=0)
  52         {
  53                 FS::Path relpath = FS::relative(path, builder.get_prefix());
  54                 return "<prefix>"+relpath.str().substr(1);
  55         }
  56
  57         return path.str();
  58 }
  59
  60 void FileTarget::touch()
  61 {
  62         mtime = Time::now();
  63         modified();
  64         signal_bubble_rebuild.emit();
  65 }
  66
  67 Target *FileTarget::resolve_transitive_dependency(Target &from, Target &dep) const
  68 {
  69         FileTarget *from_file = dynamic_cast<FileTarget *>(&from);
  70         FileTarget *dep_file = dynamic_cast<FileTarget *>(&dep);
  71         if(!from_file || !dep_file)
  72                 return &dep;
  73
  74         const SourcePackage *from_pkg = from.get_package();
  75         if(dep_file->get_package()!=from_pkg || FS::descendant_depth(dep_file->get_path(), from_pkg->get_source_directory())<0)
  76                 return &dep;
  77
  78         /* Adjust the path of the dependency to account for the install location
  79         of the dependent target. */
  80         const Component *from_comp = from_file->get_real_target()->get_component();
  81         const Component *dep_comp = dep_file->get_component();
  82         FS::Path from_inst = from_comp->get_install_map().get_install_location(*from_file->get_real_target());
  83         FS::Path dep_inst = dep_comp->get_install_map().get_install_location(*dep_file);
  84         FS::Path displaced = FS::dirname(from_file->get_path())/FS::relative(dep_inst, from_inst)/FS::basename(dep_file->get_path());
  85         if(Target *result = builder.get_vfs().get_target(displaced))
  86                 return result;
  87
  88         /* If the target was in an overlay directory and the displaced
  89         dependency is not found, try removing the overlay from the path. */
  90         string last_dir = FS::basename(FS::dirname(displaced));
  91         if(any_equals(dep_comp->get_overlays(), last_dir))
  92         {
  93                 displaced = displaced.subpath(0, displaced.size()-2)/FS::basename(dep_file->get_path());
  94                 return builder.get_vfs().get_target(displaced);
  95         }
  96
  97         return nullptr;
  98 }
  99
 100 void FileTarget::check_rebuild()
 101 {
 102         if(!tool || needs_rebuild())
 103                 return;
 104
 105         if(!mtime)
 106                 mark_rebuild("Does not exist");
 107         else
 108         {
 109                 for(Target *d: depends)
 110                 {
 111                         FileTarget *ft = dynamic_cast<FileTarget *>(d);
 112                         if(ft && ft->get_mtime()>mtime)
 113                                 mark_rebuild(d->get_name()+" has changed");
 114                         else if(d->needs_rebuild())
 115                                 mark_rebuild(d->get_name()+" needs rebuilding");
 116                         if(needs_rebuild())
 117                                 break;
 118                 }
 119         }
 120
 121         if(!needs_rebuild())
 122         {
 123                 // Some side effects might not exist
 124                 auto i = find_if(side_effects, [](const Target *s){ return s->needs_rebuild(); });
 125                 if(i!=side_effects.end())
 126                         mark_rebuild((*i)->get_name()+" needs rebuilding");
 127                 if(primary_target && primary_target->needs_rebuild())
 128                         mark_rebuild(primary_target->get_name()+" needs rebuilding");
 129         }
 130
 131         if(!needs_rebuild() && package)
 132         {
 133                 if(package->get_config().get_mtime()>mtime)
 134                         mark_rebuild("Package options changed");
 135
 136                 if(tool->get_executable())
 137                 {
 138                         string build_sig = create_build_signature();
 139                         if(package->get_cache().has_key(this, "build_sig"))
 140                         {
 141                                 if(package->get_cache().get_value(this, "build_sig")!=build_sig)
 142                                         mark_rebuild("Build signature changed");
 143                         }
 144                 }
 145         }
 146 }
 147
 148 string FileTarget::create_build_signature() const
 149 {
 150         if(!package)
 151                 return string();
 152
 153         const BuildInfo &binfo = (component ? component->get_build_info() : package->get_build_info());
 154         vector<string> sigs;
 155
 156         if(arch_in_build_sig)
 157                 if(const Architecture *arch = tool->get_architecture())
 158                         sigs.push_back(arch->get_name());
 159
 160         sigs.push_back(tool->create_build_signature(binfo));
 161
 162         if(nested_build_sig && component)
 163         {
 164                 vector<const Tool *> seen_tools;
 165                 vector<string> tool_sigs;
 166                 for(Target *d: depends)
 167                         if(const Tool *t = d->get_tool())
 168                                 if(d->get_component()==component && !any_equals(seen_tools, t))
 169                                 {
 170                                         seen_tools.push_back(t);
 171                                         tool_sigs.push_back(t->create_build_signature(binfo));
 172                                 }
 173
 174                 sort(tool_sigs);
 175                 sigs.insert(sigs.end(), make_move_iterator(tool_sigs.begin()), make_move_iterator(tool_sigs.end()));
 176         }
 177
 178         return join(sigs.begin(), sigs.end(), ";");
 179 }
 180
 181 void FileTarget::build(Task &task)
 182 {
 183         task.add_target(*this);
 184         task.set_unlink(true);
 185 }
 186
 187 void FileTarget::build_finished(bool success)
 188 {
 189         if(success)
 190         {
 191                 stat();
 192                 if(package)
 193                 {
 194                         string build_sig = create_build_signature();
 195                         if(!build_sig.empty())
 196                                 package->get_cache().set_value(this, "build_sig", build_sig);
 197                 }
 198         }
 199
 200         Target::build_finished(success);
 201 }
 202
 203 void FileTarget::clean()
 204 {
 205         if(mtime)
 206         {
 207                 FS::unlink(path);
 208                 mtime = Time::TimeStamp();
 209                 size = 0;
 210                 check_rebuild();
 211         }
 212 }