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//####COPYRIGHTBEGIN####

//                                                                          

// ----------------------------------------------------------------------------

// Copyright (C) 1998, 1999, 2000, 2002 Red Hat, Inc.

//

// This program is part of the eCos host tools.

//

// This program is free software; you can redistribute it and/or modify it 

// under the terms of the GNU General Public License as published by the Free 

// Software Foundation; either version 2 of the License, or (at your option) 

// any later version.

// 

// This program is distributed in the hope that it will be useful, but WITHOUT 

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 

// more details.

// 

// You should have received a copy of the GNU General Public License along with

// this program; if not, write to the Free Software Foundation, Inc., 

// 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

//

// ----------------------------------------------------------------------------

//                                                                          

//####COPYRIGHTEND####

//==========================================================================

//

//      build.cxx

//

//      The implementation of build tree and makefile generation using

//      CDL data

//

//==========================================================================

//==========================================================================

//#####DESCRIPTIONBEGIN####                                             

//

// Author(s):           jld

// Date:                1999-11-08

//

//####DESCRIPTIONEND####

//==========================================================================

#if defined(_WIN32) || defined(__CYGWIN__)

        #include <windows.h> /* for GetShortPathNameA() */

#endif

#ifdef __CYGWIN__

        #include <sys/cygwin.h> /* for cygwin_conv_to_posix_path() */

#endif

#ifdef __WXMSW__

// We take advantage of wxWindows' recursive wxFileName::Mkdir function

// to workaround a bug in Tcl on Windows 9x

#include "wx/filename.h"

#  ifdef new

#    undef new

#  endif

#endif

#include "flags.hxx"

#include "build.hxx"

// Two methods of generating Cygwin filenames

// ECOS_USE_CYGDRIVE = 0: use e.g. //c/, but this is deprecated in new versions of Cygwin

// ECOS_USE_CYGDRIVE = 1: use e.g. /cygdrive/c/

// ECOS_USE_CYGDRIVE = 2: use e.g. c:/ notation

// ECOS_USE_CYGDRIVE = 3: use e.g. /ecos-x notation where x is a drive name.

#define ECOS_USE_CYGDRIVE 3

// Use registry functions to find out location of /cygdrive

#define ECOS_USE_REGISTRY 1

// Don't use Reg... functions in command-line version until we know how

// to add advapi32.lib

#if defined(_WIN32) && !defined(__WXMSW__) && !defined(ECOS_CT)

#undef ECOS_USE_REGISTRY

#define ECOS_USE_REGISTRY 0

#endif

std::string makefile_header = "# eCos makefile\n\n# This is a generated file - do not edit\n\n";

// This code seems to crash Tcl under Windows ME and Linux, so

// disable for now. What should the criterion be? TCL version?

#define SET_STDOUT_TO_NULL 0

bool eval_tcl_command (const std::string command) {

        Tcl_Interp * interp = Tcl_CreateInterp ();

#if SET_STDOUT_TO_NULL

        Tcl_Channel outchan = Tcl_OpenFileChannel (interp, "nul", "a+", 777);

        Tcl_SetStdChannel (outchan, TCL_STDOUT); // direct standard output to the null device

#endif

        int nStatus = Tcl_Eval (interp, CDL_TCL_CONST_CAST(char*, command.c_str()));

#if SET_STDOUT_TO_NULL

        Tcl_SetStdChannel (NULL, TCL_STDOUT);

        Tcl_UnregisterChannel (interp, outchan);

#endif

        Tcl_DeleteInterp (interp);

        return (TCL_OK == nStatus);

}

// generate a copy of a string where each occurance of a specified char is replaced with another char

std::string replace_char (const std::string input, const char old_char, const char new_char) {

        std::string output;

        for (unsigned int n = 0; n < input.size (); n++) { // for each char

                output += (old_char == input [n]) ? new_char : input [n]; // convert during copy

        }

        return output;

}

// convert a filepath into a vector of path components

static void path_to_vector (std::string input, std::vector <std::string> & output) {

        std::string component;

        output.clear ();

        for (unsigned int n = 0; n < input.size (); n++) { // for each char in the path

                if (('/' == input [n]) || ('\\' == input [n])) { // if char is a directory separator

                        output.push_back (component); // add path component to output vector

                        component.erase (); // clear path component string

                } else { // char is not a separator

                        component += input [n]; // add char to path component string

                }

        }

        output.push_back (component); // add final path component to output vector

}

// eliminate spaces from a DOS filepath by substituting the

// short form of path components containing spaces

#if defined(_WIN32) || defined(__CYGWIN__)

std::string nospace_path (const std::string input) {

        // split the path into a vector of path components

        std::vector <std::string> long_path_vector;

        path_to_vector (input, long_path_vector);

        // convert the path to its short form and split

        // the result into a vector of path components

        char buffer [MAX_PATH + 1];

        GetShortPathNameA (input.c_str (), buffer, sizeof (buffer));

        std::vector <std::string> short_path_vector;

        path_to_vector (buffer, short_path_vector);

        // append the short or long form of each path component to the output string as appropriate

        std::string output;

        for (unsigned int n = 0; n < long_path_vector.size (); n++) { // for each component of the path

                if (long_path_vector [n].end () != std::find (long_path_vector [n].begin (), long_path_vector [n].end (), ' ')) { // if there is a space in the path component

                        output += short_path_vector [n]; // add the short form of the path component

                } else { // there is no space in the path component

                        output += long_path_vector [n]; // add the long form of the path component

                }

                output += '\\'; // add a directory separator

        }

        output.resize (output.size () - 1); // remove the trailing separator

        return output;

}

#endif

// convert a DOS filepath to a Cygwin filepath

std::string cygpath (const std::string input) {

#if defined(_WIN32) || defined(__CYGWIN__)

        // remove spaces from the DOS filepath

        const std::string path = nospace_path (input);

        std::string output;

        // convert the DOS filepath to Cygwin notation - using Cygwin if available

    // 2001-10-15: should now do the same thing under Cygwin as under VC++, namely

    // use the /ecos-x form.

#if 0 // def __CYGWIN__

        char buffer [MAX_PATH + 1];

        cygwin_conv_to_posix_path (path.c_str (), buffer);

        output = buffer;

#else

#if ECOS_USE_CYGDRIVE == 1

    std::string strCygdrive("/cygdrive");

#if ECOS_USE_REGISTRY

    HKEY hKey = 0;

    if (ERROR_SUCCESS == RegOpenKeyEx(HKEY_CURRENT_USER, "Software\\Cygnus Solutions\\Cygwin\\mounts v2",

        0, KEY_READ, &hKey))

    {

        DWORD type;

        BYTE value[256];

        DWORD sz;

        if (ERROR_SUCCESS == RegQueryValueEx(hKey, "cygdrive prefix", NULL, & type, value, & sz))

        {

            strCygdrive = (const char*) value;

        }

        RegCloseKey(hKey);

    }

#endif

    strCygdrive = strCygdrive + "/";

        for (unsigned int n = 0; n < path.size (); n++) { // for each char

                if ((1 == n) && (':' == path [n])) { // if a DOS logical drive letter is present

                        output = strCygdrive + output; // convert to Cygwin notation

                } else {

                        output += ('\\' == path [n]) ? '/' : path [n]; // convert backslash to slash

                }

        }

#elif ECOS_USE_CYGDRIVE == 2

    // Convert to c:/foo/bar notation

        for (unsigned int n = 0; n < path.size (); n++) { // for each char

                        output += ('\\' == path [n]) ? '/' : path [n]; // convert backslash to slash

        }

#elif ECOS_USE_CYGDRIVE == 3

    // Convert to /ecos-x notation, assuming that this mount point will be created

    // by the application.

    std::string output1;

    if (path.size() > 1 && path[1] == ':')

    {

        output1 = "/ecos-";

        output1 += tolower(path[0]);

        output1 += "/";

        // Append the rest of the path

        if (path.size() > 2)

        {

            unsigned int n = 2;

            unsigned int i;

            if (path[n] == '\\' || path[n] == '/')

                n ++;

            for (i = n; i < path.size(); i++)

                output1 += path[i];

        }

    }

    else

        output1 = path;

    for (unsigned int n = 0; n < output1.size (); n++) { // for each char

        output += ('\\' == output1 [n]) ? '/' : output1 [n]; // convert backslash to slash

        }

#else

        for (unsigned int n = 0; n < path.size (); n++) { // for each char

                if ((1 == n) && (':' == path [n])) { // if a DOS logical drive letter is present

                        output = "//" + output; // convert to Cygwin notation

                } else {

                        output += ('\\' == path [n]) ? '/' : path [n]; // convert backslash to slash

                }

        }

#endif

    // ECOS_USE_CYGDRIVE

#endif

        return output;

#else

        return input;

#endif

}

// create a directory

bool create_directory (const std::string directory) {

// We take advantage of wxWindows' recursive wxFileName::Mkdir function

// to workaround a bug in Tcl on Windows 9x

#if defined(__WXMSW__)

    if (wxDirExists(directory.c_str()))

        return TRUE;

    return wxFileName::Mkdir(directory.c_str(), 0777, TRUE);

#else

    return eval_tcl_command ("file mkdir \"" + directory + "\"");

#endif

}

// copy a file

bool copy_file (const std::string file, const std::string destination) {

        return eval_tcl_command ("file copy \"" + file + "\" \"" + destination + "\"");

        return true;

}

// returns the directory of the specified file

std::string file_to_directory (const std::string file) {

        for (unsigned int n = file.size (); n >= 0; n--) {

                if ('/' == file [n]) {

                        std::string directory = file;

                        directory.resize (n);

                        return directory;

                }

        }

        return "";

}

std::string tab_indent (const std::string input) {

        std::string output;

        bool indent = true;

        for (unsigned int n = 0; n < input.size (); n++) {

                if (indent) {

                        output += '\t';

                        indent = false;

                } else {

                        indent = ('\n' == input [n]);

                }

                output += input [n];

        }

        return output;

}

// return the tests of the specified loadable

std::string get_tests (const CdlConfiguration config, const CdlBuildInfo_Loadable & build_info) {

        CdlValuable tests = dynamic_cast <CdlValuable> (config->lookup (build_info.name + "_TESTS"));

    // check if there are tests active and enabled

        if (tests && tests->is_active() && tests->is_enabled()) {

                return tests->get_value ();

        } else { // there are no tests

                return "";

        }

}

// replaces all occurances of a substring with a new substring

std::string replace_substr (const std::string input, const std::string old_substring, const std::string new_substring) {

        std::string output = input;

        std::string::size_type index = 0;

        while (index = output.find (old_substring, index), std::string::npos != index) {

                output.replace (index, old_substring.size (), new_substring);

        }

        return output;

}

// resolve tokens in custom make rule targets and dependencies

std::string resolve_tokens (const std::string input) {

        std::string output = input;

        output = replace_substr (output, "<PREFIX>", "$(PREFIX)");

        output = replace_substr (output, "<PACKAGE>", "$(REPOSITORY)/$(PACKAGE)");

        return output;

}

// create the makefile for a loadable

bool generate_makefile (const CdlConfiguration config, const CdlBuildInfo_Loadable & info, const std::string install_tree, const std::string filename) {

        unsigned int count;

        unsigned int library;

        // obtain the command prefix

        std::string command_prefix = get_flags (config, NULL, "COMMAND_PREFIX");

        if (! command_prefix.empty ()) { // if there is a command prefix

                command_prefix += '-'; // add a trailing hyphen

        }

        // generate the prefix for archived objects

        unsigned int final_separator = 0; // the index of the last directory separator

        std::string object_prefix = info.directory; // start with the loadable directory

        for (count = 0; count < object_prefix.size (); count++) { // for each char

                if ('/' == object_prefix [count]) { // if the char is a directory separator

                        object_prefix [count] = '_'; // replace the char with an underscore

                        final_separator = count;

                }

        }

        object_prefix.resize (final_separator); // remove the version directory

        // open the makefile

        FILE * stream = fopen (filename.c_str (), "wt");

        if (stream == NULL) // if the file could not be opened

                return false;

        // generate the header

        fprintf (stream, makefile_header.c_str ());

        // generate the global variables

        fprintf (stream, "export REPOSITORY := %s\n", cygpath (config->get_database ()->get_component_repository ()).c_str ());

        fprintf (stream, "export PREFIX := %s\n", cygpath (install_tree).c_str ());

        fprintf (stream, "export COMMAND_PREFIX := %s\n", command_prefix.c_str ());

        fprintf (stream, "export CC := $(COMMAND_PREFIX)gcc\n");

        fprintf (stream, "export OBJCOPY := $(COMMAND_PREFIX)objcopy\n");

#if defined(_WIN32) || defined(__CYGWIN__)

    fprintf (stream, "export HOST := CYGWIN\n");

#else

    fprintf (stream, "export HOST := UNIX\n");

#endif

        fprintf (stream, "export AR := $(COMMAND_PREFIX)ar\n\n");

        // generate the package variables

        fprintf (stream, "PACKAGE := %s\n", info.directory.c_str ());

        fprintf (stream, "OBJECT_PREFIX := %s\n", object_prefix.c_str ());

        fprintf (stream, "CFLAGS := %s\n", get_flags (config, &info, "CFLAGS").c_str ());

        fprintf (stream, "LDFLAGS := %s\n", get_flags (config, &info, "LDFLAGS").c_str ());

        fprintf (stream, "VPATH := $(REPOSITORY)/$(PACKAGE)\n");

        fprintf (stream, "INCLUDE_PATH := $(INCLUDE_PATH) -I$(PREFIX)/include $(foreach dir,$(VPATH),-I$(dir) -I$(dir)/src -I$(dir)/tests) -I.\n");

        fprintf (stream, "MLT := $(wildcard $(REPOSITORY)/$(PACKAGE)/include/pkgconf/mlt*.ldi $(REPOSITORY)/$(PACKAGE)/include/pkgconf/mlt*.h)\n");

        fprintf (stream, "TESTS := %s\n\n", get_tests (config, info).c_str ());

        // create a vector of libraries

        std::vector <std::string> library_vector;

        for (count = 0; count < info.compiles.size (); count++) { // for each compilable file

                const std::string & library = info.compiles [count].library;

                if (library_vector.end () == std::find (library_vector.begin (), library_vector.end (), library)) { // if a new library

                        library_vector.push_back (library); // add the library to the vector

                }

        }

        for (count = 0; count < info.objects.size (); count++) { // for each object file

                const std::string & library = info.objects [count].library;

                if (library_vector.end () == std::find (library_vector.begin (), library_vector.end (), library)) { // if a new library

                        library_vector.push_back (library); // add the library to the vector

                }

        }

        for (count = 0; count < info.make_objects.size (); count++) { // for each make object

                const std::string & library = info.make_objects [count].library;

                if (library_vector.end () == std::find (library_vector.begin (), library_vector.end (), library)) { // if a new library

                        library_vector.push_back (library); // add the library to the vector

                }

        }

        // generate the default rule

        fprintf (stream, "build: headers");

        for (library = 0; library < library_vector.size (); library++) { // for each library

                fprintf (stream, " %s.stamp", library_vector [library].c_str ());

        }

        fprintf (stream, "\n\n");

        // generate library rules

        for (library = 0; library < library_vector.size (); library++) { // for each library

                fprintf (stream, "LIBRARY := %s\n", library_vector [library].c_str ());

                fprintf (stream, "COMPILE :=");

                for (count = 0; count < info.compiles.size (); count++) { // for each compilable file

                        if (library_vector [library] == info.compiles [count].library) { // if the file and library are related

                                fprintf (stream, " %s", info.compiles [count].source.c_str ());

                        }

                }

                for (count = 0; count < info.objects.size (); count++) { // for each object file

                        if (library_vector [library] == info.objects [count].library) { // if the file and library are related

                                fprintf (stream, " %s", info.objects [count].object.c_str ());

                        }

                }

                for (count = 0; count < info.make_objects.size (); count++) { // for each make object

                        if (library_vector [library] == info.make_objects [count].library) { // if the object and library are related

                                fprintf (stream, " %s", info.make_objects [count].object.c_str ());

                        }

                }

                fprintf (stream, "\nOBJECTS := $(COMPILE:.cxx=.o.d)\n");

                fprintf (stream, "OBJECTS := $(OBJECTS:.c=.o.d)\n");

                fprintf (stream, "OBJECTS := $(OBJECTS:.S=.o.d)\n\n");

                fprintf (stream, "$(LIBRARY).stamp: $(OBJECTS)\n");

                fprintf (stream, "\t$(AR) rcs $(PREFIX)/lib/$(@:.stamp=) $(foreach obj,$?,$(dir $(obj))$(OBJECT_PREFIX)_$(notdir $(obj:.o.d=.o)))\n");

                fprintf (stream, "\t@cat $^ > $(@:.stamp=.deps)\n");

                fprintf (stream, "\t@touch $@\n\n");

        }

        // generate make objects rules

        for (count = 0; count < info.make_objects.size (); count++) { // for each make object

                fprintf (stream, "%s: %s\n%s\n", info.make_objects [count].object.c_str (), info.make_objects [count].deps.c_str (), tab_indent (info.make_objects [count].rules).c_str ());

        }

        // generate makes rules

        for (count = 0; count < info.makes.size (); count++) { // for each make

                fprintf (stream, "%s: $(wildcard %s)\n%s\n", resolve_tokens (info.makes [count].target).c_str (), resolve_tokens (info.makes [count].deps).c_str (), tab_indent (info.makes [count].rules).c_str ());

        }

        // generate header rules

        fprintf (stream, "headers: mlt_headers");

        for (count = 0; count < info.headers.size (); count++) { // for each header

                fprintf (stream, " $(PREFIX)/include/%s", info.headers [count].destination.c_str ());

        }

        fprintf (stream, "\n\n");

        for (count = 0; count < info.headers.size (); count++) { // for each header

                fprintf (stream, "$(PREFIX)/include/%s: $(REPOSITORY)/$(PACKAGE)/%s\n", info.headers [count].destination.c_str (), info.headers [count].source.c_str ());

#if (defined(_WIN32) || defined(__CYGWIN__)) && (ECOS_USE_CYGDRIVE > 0)

        fprintf (stream, "ifeq ($(HOST),CYGWIN)\n");

            fprintf (stream, "\t@mkdir -p `cygpath -w \"$(dir $@)\" | sed \"s@\\\\\\\\\\\\\\\\@/@g\"`\n");

        fprintf (stream, "else\n");

            fprintf (stream, "\t@mkdir -p $(dir $@)\n");

        fprintf (stream, "endif\n");

#else

        // This prevents older versions of mkdir failing

        fprintf (stream, "\t@mkdir -p $(dir $@)\n");

#endif

                fprintf (stream, "\t@cp $< $@\n");

                fprintf (stream, "\t@chmod u+w $@\n\n");

        }

        // include default rules

        fprintf (stream, "include $(REPOSITORY)/pkgconf/rules.mak\n\n");

        // close the makefile

        return (0 == fclose (stream));

}

// a structure and operator for sorting custom make rules by priority

struct info_make {

        std::vector <CdlBuildInfo_Loadable>::const_iterator loadable;

        unsigned int make;

};

bool operator < (info_make op1, info_make op2) {

        return op1.loadable->makes [op1.make].priority < op2.loadable->makes [op2.make].priority;

}

// create the top-level makefile

bool generate_toplevel_makefile (const CdlConfiguration config, const std::string install_tree, const std::string filename) {

        unsigned int loadable;

        unsigned int make;

        // obtain the command prefix

        std::string command_prefix = get_flags (config, NULL, "COMMAND_PREFIX");

        if (! command_prefix.empty ()) { // if there is a command prefix

                command_prefix += '-'; // add a trailing hyphen

        }

        // obtain build information from the specified configuration

        CdlBuildInfo build_info;

        config->get_build_info (build_info);

        std::vector <CdlBuildInfo_Loadable> info_vector = build_info.entries;

        // create a vector of makes and sort them by priority

        std::vector <info_make> info_make_vector;

        for (std::vector <CdlBuildInfo_Loadable>::iterator info = info_vector.begin (); info != info_vector.end (); info++) { // for each buildable loaded package

                for (unsigned int count = 0; count < info->makes.size (); count++) { // for each make

                        info_make make_info = {info, count};

                        info_make_vector.push_back (make_info);

                }

        }

        std::sort (info_make_vector.begin (), info_make_vector.end ());

        // open the makefile

        FILE * stream = fopen (filename.c_str (), "wt");

        if (stream == NULL) // if the file could not be opened

                return false;

        // generate the header

        fprintf (stream, makefile_header.c_str ());

        // generate the variables

        fprintf (stream, "export REPOSITORY := %s\n", cygpath (config->get_database ()->get_component_repository ()).c_str ());

#if defined(_WIN32) || defined(__CYGWIN__)

    fprintf (stream, "export HOST := CYGWIN\n");

#else

    fprintf (stream, "export HOST := UNIX\n");

#endif

        fprintf (stream, "export PREFIX := %s\n", cygpath (install_tree).c_str ());

        fprintf (stream, "export COMMAND_PREFIX := %s\n", command_prefix.c_str ());

        fprintf (stream, "export CC := $(COMMAND_PREFIX)gcc\n");

        fprintf (stream, "export OBJCOPY := $(COMMAND_PREFIX)objcopy\n");

        fprintf (stream, "export AR := $(COMMAND_PREFIX)ar\n\n");

    // generate the makefile contents

        fprintf (stream, ".PHONY: default build clean tests headers\n\n");

        fprintf (stream, "build: headers $(PREFIX)/include/pkgconf/ecos.mak\n");

        for (make = 0; make < info_make_vector.size (); make++) { // for each make

                if (info_make_vector [make].loadable->makes [info_make_vector [make].make].priority < 100) { // if priority higher than default complilation

                        fprintf (stream, "\t$(MAKE) -r -C %s %s\n", info_make_vector [make].loadable->directory.c_str (), resolve_tokens (info_make_vector [make].loadable->makes [info_make_vector [make].make].target).c_str ());

                }

        }

        for (loadable = 0; loadable < info_vector.size (); loadable++) { // for each buildable loaded package

                const std::string source_path = info_vector [loadable].directory;

                fprintf (stream, "\t$(MAKE) -r -C %s $@\n", source_path.c_str ());

        }

        for (make = 0; make < info_make_vector.size (); make++) { // for each make

                if (info_make_vector [make].loadable->makes [info_make_vector [make].make].priority >= 100) { // if priority lower than or equal to default complilation

                        fprintf (stream, "\t$(MAKE) -r -C %s %s\n", info_make_vector [make].loadable->directory.c_str (), resolve_tokens (info_make_vector [make].loadable->makes [info_make_vector [make].make].target).c_str ());

                }

        }

        fprintf (stream, "\t@echo $@ finished\n\n");

        fprintf (stream, "clean:\n");

        for (loadable = 0; loadable < info_vector.size (); loadable++) { // for each buildable loaded package

                const std::string source_path = info_vector [loadable].directory;

                fprintf (stream, "\t$(MAKE) -r -C %s $@\n", source_path.c_str ());

        }

        fprintf (stream, "\t@echo $@ finished\n\n");

        fprintf (stream, "tests: build\n");

        for (loadable = 0; loadable < info_vector.size (); loadable++) { // for each buildable loaded package

                const std::string source_path = info_vector [loadable].directory;

                fprintf (stream, "\t$(MAKE) -r -C %s $@\n", source_path.c_str ());

        }

        fprintf (stream, "\t@echo $@ finished\n\n");

        fprintf (stream, "headers:\n");

        for (loadable = 0; loadable < info_vector.size (); loadable++) { // for each buildable loaded package