10 files changed, 97 insertions, 7 deletions

diff --git a/src/build.l b/src/build.l
index a88f90d..a18cbeb 100644
--- a/src/build.l
+++ b/src/build.l
@@ -40,6 +40,7 @@ std::string strbuf;
 "produces"                                                      return TOK_PRODUCES;
 "command"                                                       return TOK_COMMAND;
 "check"                                                         return TOK_CHECK;
+"clean"                                                         return TOK_CLEAN;
 
 "..."\n                                                         /* elipsis line continuation */
 \n+                                                                     return TOK_EOL;
diff --git a/src/build.y b/src/build.y
index ecc5d59..4d87a86 100644
--- a/src/build.y
+++ b/src/build.y
@@ -49,6 +49,7 @@ void yyerror( YYLTYPE *locp, Builder &bld, char const *msg );
 %token TOK_PRODUCES                             "produces"
 %token TOK_COMMAND                              "command"
 %token TOK_CHECK                                "check"
+%token TOK_CLEAN                                "clean"
 %token TOK_EOL                                  "end of line"
 %token ',' ':' '='
 
@@ -162,6 +163,10 @@ action: TOK_CHECK STRING
             {
                         bld.add( new Command( Command::cmdCheck, $2 ) );
                 }
+          | TOK_CLEAN STRING
+            {
+                        bld.add( new Command( Command::cmdClean, $2 ) );
+                }
           ;
 
 setexpr: STRING '=' STRING
diff --git a/src/builder.h b/src/builder.h
index f21e411..f27a042 100644
--- a/src/builder.h
+++ b/src/builder.h
@@ -100,8 +100,10 @@ public:
                 return mTarget[sName];
         }
 
-        std::list<std::string> getRequires( const char *sReq )
+        std::list<std::string> *getRequires( const char *sReq )
         {
+                if( mRequires.find(sReq) == mRequires.end() )
+                        return NULL;
                 return mRequires[sReq];
         }
 
diff --git a/src/filetarget.cpp b/src/filetarget.cpp
index 1880c35..f9367a4 100644
--- a/src/filetarget.cpp
+++ b/src/filetarget.cpp
@@ -1,6 +1,7 @@
 #include <errno.h>
 #include <dirent.h>
 
+#include "perform.h"
 #include "rule.h"
 #include "filetarget.h"
 #include "builder.h" // for BuildException
@@ -66,8 +67,11 @@ void FileTarget::addInputDir( const char *sDir )
         closedir( dir );
 }
 
+int nNew, nCache;
+
 void FileTarget::check( Builder &bld )
 {
+        nNew = nCache = 0;
         Rule *pRule = bld.getRule( sRule );
 
         std::list<Perform *> perf;
@@ -79,12 +83,67 @@ void FileTarget::check( Builder &bld )
         for( std::list<Perform *>::iterator i = perf.begin();
                  i != perf.end(); i++ )
         {
-                std::list<std::string> lReqs = bld.getRequires( (*i)->getTarget() );
-                
+                time_t target = getTime( std::string((*i)->getTarget()) );
+                std::list<std::string> *lReqs = bld.getRequires( (*i)->getTarget() );
+                if( lReqs == NULL )
+                {
+                        printf("No dependancies: %s\n", (*i)->getTarget() );
+                        continue;
+                }
+                for( std::list<std::string>::iterator j = lReqs->begin();
+                         j != lReqs->end(); j++ )
+                {
+                        if( getTime( *j ) > target )
+                        {
+                                (*i)->execute( bld );
+                                updateTime( (*i)->getTarget() );
+                                break;
+                        }
+                }
         }
+
+        printf("Cache hits %d, %d new (%f%%)\n", nCache, nNew, nCache/ (double)(nNew+nCache)*100.0 );
 }
 
 void FileTarget::clean( Builder &bld )
 {
+        Rule *pRule = bld.getRule( sRule );
+
+        std::list<Perform *> perf;
+        std::list<std::string> tmp = pRule->execute( bld, lInput, perf, getName() );
+        lOutput.insert( lOutput.end(), tmp.begin(), tmp.end() );
+
+        for( std::list<std::string>::iterator i = lOutput.begin();
+                 i != lOutput.end(); i++ )
+        {
+                unlink( (*i).c_str() );
+        }
+}
+
+time_t FileTarget::getTime( std::string str )
+{
+        std::map<std::string, time_t>::iterator i = mTimes.find( str );
+        if( i != mTimes.end() )
+        {
+                nCache++;
+                return (*i).second;
+        }
+
+        struct stat st;
+        stat( str.c_str(), &st );
+
+        mTimes[str] = st.st_mtime;
+
+        nNew++;
+
+        return st.st_mtime;
+}
+
+void FileTarget::updateTime( std::string str )
+{
+        struct stat st;
+        stat( str.c_str(), &st );
+
+        mTimes[str] = st.st_mtime;
 }
 
diff --git a/src/filetarget.h b/src/filetarget.h
index c872c0a..856e854 100644
--- a/src/filetarget.h
+++ b/src/filetarget.h
@@ -2,6 +2,10 @@
 #define FILE_TARGET_H
 
 #include <stdint.h>
+#include <map>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
 #include "target.h"
 
 class FileTarget : public Target
@@ -16,9 +20,12 @@ public:
 
         virtual void check( class Builder &bld );
         virtual void clean( class Builder &bld );
+
+        time_t getTime( std::string str );
+        void updateTime( std::string str );
         
 private:
-        // start here with the file time cache
+        std::map<std::string, time_t> mTimes;
 
 };
 
diff --git a/src/main.cpp b/src/main.cpp
index ebf0cfd..ebfb745 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,12 +1,15 @@
 #include "builder.h"
 
-int main()
+int main( int argc, char *argv[] )
 {
         Builder bld;
 
         bld.load("build.conf");
 
-        bld.build();
+        if( argc >= 2 )
+                bld.build( argv[1] );
+        else
+                bld.build();
 /*
         printf("\n\n----------\nDebug dump\n----------\n");
         bld.debug();*/
diff --git a/src/perform.cpp b/src/perform.cpp
index d7082a0..c96d70f 100644
--- a/src/perform.cpp
+++ b/src/perform.cpp
@@ -8,3 +8,4 @@ Perform::Perform( const char *sTarget ) :
 Perform::~Perform()
 {
 }
+
diff --git a/src/perform.h b/src/perform.h
index 2eb8cb0..914f3b0 100644
--- a/src/perform.h
+++ b/src/perform.h
@@ -2,6 +2,7 @@
 #define PERFORM_H
 
 #include <stdint.h>
+#include "staticstring.h"
 
 class Perform
 {
diff --git a/src/performcmd.cpp b/src/performcmd.cpp
index 724f42b..d9b7977 100644
--- a/src/performcmd.cpp
+++ b/src/performcmd.cpp
@@ -3,7 +3,7 @@
 
 PerformCmd::PerformCmd( const char *sCmd, const char *sTarget ) :
         Perform( sTarget ),
-        sCommand( sCmd ),
+        sCommand( sCmd )
 {
 }
 
diff --git a/src/rule.cpp b/src/rule.cpp
index 979075b..ce37e93 100644
--- a/src/rule.cpp
+++ b/src/rule.cpp
@@ -77,6 +77,7 @@ Perform *Rule::buildCommand( Builder &bld, const char *sCmd, Builder::varmap *va
 
 std::list<std::string> Rule::execute( Builder &bld, std::list<std::string> lInput, std::list<Perform *> &lPerf, const char *sTarget )
 {
+        bld.requiresRegexp( false );
         std::list<Rule *> lRule = bld.findRuleChain( this );
         /*
         if( !lRule.empty() )
@@ -134,11 +135,21 @@ std::list<std::string> Rule::execute( Builder &bld, std::list<std::string> lInpu
                                                 revars
                                                 );
                                         lPerf.push_back( p );
+
+                                        bld.requires(
+                                                (*revars)["target"].c_str(),
+                                                (*revars)["match"].c_str()
+                                                );
                                 }
                                 else if( mHow == matchAll )
                                 {
                                         sMatches += " ";
                                         sMatches += (*i);
+
+                                        bld.requires(
+                                                sTarget,
+                                                (*i).c_str()
+                                                );
                                 }
                         }
                         delete revars;