lyx_mirror/src/support/Package.cpp
Jean-Marc Lasgouttes 8a9d765739 Bug #6842, part II
Make sure that Package can be initialized several time.s
Make sure that Package is not used before being initialized.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@35080 a592a061-630c-0410-9148-cb99ea01b6c8
2010-08-07 11:42:27 +00:00

711 lines
20 KiB
C++

// -*- C++ -*-
/**
* \file package.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Angus Leeming
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "support/Package.h"
#include "support/debug.h"
#include "support/environment.h"
#include "support/ExceptionMessage.h"
#include "support/filetools.h"
#include "support/gettext.h"
#include "support/lassert.h"
#include "support/lstrings.h"
#include "support/os.h"
#if defined (USE_WINDOWS_PACKAGING)
# include "support/os_win32.h"
#endif
#include <list>
#if !defined (USE_WINDOWS_PACKAGING) && \
!defined (USE_MACOSX_PACKAGING) && \
!defined (USE_POSIX_PACKAGING)
#error USE_FOO_PACKAGING must be defined for FOO = WINDOWS, MACOSX or POSIX.
#endif
#if defined (USE_MACOSX_PACKAGING)
# include <CoreServices/CoreServices.h> // FSFindFolder, FSRefMakePath
#endif
using namespace std;
namespace lyx {
namespace support {
namespace {
Package package_;
bool initialised_ = false;
} // namespace anon
void init_package(string const & command_line_arg0,
string const & command_line_system_support_dir,
string const & command_line_user_support_dir,
exe_build_dir_to_top_build_dir top_build_dir_location)
{
package_ = Package(command_line_arg0,
command_line_system_support_dir,
command_line_user_support_dir,
top_build_dir_location);
initialised_ = true;
}
Package const & package()
{
LASSERT(initialised_, /**/);
return package_;
}
namespace {
FileName const abs_path_from_binary_name(string const & exe);
void buildDirs(FileName const & abs_binary,
exe_build_dir_to_top_build_dir top_build_dir_location,
FileName &, FileName &);
FileName const get_document_dir(FileName const & home_dir);
FileName const get_home_dir();
FileName const get_locale_dir(FileName const & system_support_dir);
FileName const get_system_support_dir(FileName const & abs_binary,
string const & command_line_system_support_dir);
FileName const get_default_user_support_dir(FileName const & home_dir);
bool userSupportDir(FileName const & default_user_support_dir,
string const & command_line_user_support_dir, FileName & result);
string const & with_version_suffix();
} // namespace anon
Package::Package(string const & command_line_arg0,
string const & command_line_system_support_dir,
string const & command_line_user_support_dir,
exe_build_dir_to_top_build_dir top_build_dir_location)
: explicit_user_support_dir_(false)
{
home_dir_ = get_home_dir();
// Specification of temp_dir_ may be reset by LyXRC,
// but the default is fixed for a given OS.
system_temp_dir_ = FileName::tempPath();
temp_dir_ = system_temp_dir_;
document_dir_ = get_document_dir(home_dir_);
FileName const abs_binary = abs_path_from_binary_name(command_line_arg0);
binary_dir_ = FileName(onlyPath(abs_binary.absFileName()));
// Is LyX being run in-place from the build tree?
buildDirs(abs_binary, top_build_dir_location,
build_support_dir_, system_support_dir_);
if (build_support_dir_.empty())
system_support_dir_ =
get_system_support_dir(abs_binary,
command_line_system_support_dir);
locale_dir_ = get_locale_dir(system_support_dir_);
FileName const default_user_support_dir =
get_default_user_support_dir(home_dir_);
explicit_user_support_dir_ = userSupportDir(default_user_support_dir,
command_line_user_support_dir, user_support_dir_);
FileName const configure_script(addName(system_support().absFileName(), "configure.py"));
configure_command_ = os::python() + ' ' +
quoteName(configure_script.toFilesystemEncoding(), quote_python) +
with_version_suffix();
LYXERR(Debug::INIT, "<package>\n"
<< "\tbinary_dir " << binary_dir().absFileName() << '\n'
<< "\tsystem_support " << system_support().absFileName() << '\n'
<< "\tbuild_support " << build_support().absFileName() << '\n'
<< "\tuser_support " << user_support().absFileName() << '\n'
<< "\tlocale_dir " << locale_dir().absFileName() << '\n'
<< "\tdocument_dir " << document_dir().absFileName() << '\n'
<< "\ttemp_dir " << temp_dir().absFileName() << '\n'
<< "\thome_dir " << home_dir().absFileName() << '\n'
<< "</package>\n");
}
void Package::set_temp_dir(FileName const & temp_dir) const
{
if (temp_dir.empty())
temp_dir_ = system_temp_dir_;
else
temp_dir_ = temp_dir;
}
namespace {
// These next functions contain the stuff that is substituted at
// configuration-time.
FileName const hardcoded_localedir()
{
// FIXME UNICODE
// The build system needs to make sure that this is in utf8 encoding.
return FileName(LYX_ABS_INSTALLED_LOCALEDIR);
}
FileName const hardcoded_system_support_dir()
{
// FIXME UNICODE
// The build system needs to make sure that this is in utf8 encoding.
return FileName(LYX_ABS_INSTALLED_DATADIR);
}
string const & with_version_suffix()
{
static string const program_suffix = PROGRAM_SUFFIX;
static string const with_version_suffix =
" --with-version-suffix=" PROGRAM_SUFFIX;
return program_suffix.empty() ? program_suffix : with_version_suffix;
}
} // namespace anon
FileName const & Package::top_srcdir()
{
// FIXME UNICODE
// The build system needs to make sure that this is in utf8 encoding.
static FileName const dir(LYX_ABS_TOP_SRCDIR);
return dir;
}
namespace {
bool check_command_line_dir(string const & dir,
string const & file,
string const & command_line_switch);
FileName const extract_env_var_dir(string const & env_var);
bool check_env_var_dir(FileName const & dir,
string const & env_var);
bool check_env_var_dir(FileName const & dir,
string const & file,
string const & env_var);
string const relative_locale_dir();
string const relative_system_support_dir();
/**
* Convert \p name to internal path and strip a trailing slash, since it
* comes from user input (commandline or environment).
* \p name is encoded in utf8.
*/
string const fix_dir_name(string const & name)
{
return rtrim(os::internal_path(name), "/");
}
FileName buildSupportDir(string const & binary_dir,
exe_build_dir_to_top_build_dir top_build_dir_location)
{
string indirection;
switch (top_build_dir_location) {
case top_build_dir_is_one_level_up:
indirection = "../lib";
break;
case top_build_dir_is_two_levels_up:
indirection = "../../lib";
break;
}
return FileName(addPath(binary_dir, indirection));
}
void buildDirs(FileName const & abs_binary,
exe_build_dir_to_top_build_dir top_build_dir_location,
FileName & build_support_dir, FileName & system_support_dir)
{
string const check_text = "Checking whether LyX is run in place...";
// We're looking for "Makefile" in a directory
// binary_dir/../lib
// We're also looking for "chkconfig.ltx" in a directory
// top_srcdir()/lib
// If both are found, then we're running LyX in-place.
// Note that the name of the lyx binary may be a symbolic link.
// If that is the case, then we follow the links too.
FileName binary = abs_binary;
while (true) {
// Try and find "lyxrc.defaults".
string binary_dir = onlyPath(binary.absFileName());
build_support_dir = buildSupportDir(binary_dir, top_build_dir_location);
if (!fileSearch(build_support_dir.absFileName(), "Makefile").empty()) {
// Try and find "chkconfig.ltx".
system_support_dir =
FileName(addPath(Package::top_srcdir().absFileName(), "lib"));
if (!fileSearch(system_support_dir.absFileName(), "chkconfig.ltx").empty()) {
LYXERR(Debug::INIT, check_text << " yes");
return;
}
}
// Check whether binary is a symbolic link.
// If so, resolve it and repeat the exercise.
if (!binary.isSymLink())
break;
FileName link;
if (readLink(binary, link)) {
binary = link;
} else {
// Unable to resolve the link.
break;
}
}
LYXERR(Debug::INIT, check_text << " no");
system_support_dir = FileName();
build_support_dir = FileName();
}
// Specification of document_dir_ may be reset by LyXRC,
// but the default is fixed for a given OS.
FileName const get_document_dir(FileName const & home_dir)
{
#if defined (USE_WINDOWS_PACKAGING)
(void)home_dir; // Silence warning about unused variable.
os::GetFolderPath win32_folder_path;
return FileName(win32_folder_path(os::GetFolderPath::PERSONAL));
#else // Posix-like.
return home_dir;
#endif
}
// The specification of home_dir_ is fixed for a given OS.
// A typical example on Windows: "C:/Documents and Settings/USERNAME"
// and on a Posix-like machine: "/home/USERNAME".
FileName const get_home_dir()
{
#if defined (USE_WINDOWS_PACKAGING)
string const home_dir = getEnv("USERPROFILE");
#else // Posix-like.
string const home_dir = getEnv("HOME");
#endif
return FileName(fix_dir_name(home_dir));
}
// Several sources are probed to ascertain the locale directory.
// The only requirement is that the result is indeed a directory.
FileName const get_locale_dir(FileName const & system_support_dir)
{
// 1. Use the "LYX_LOCALEDIR" environment variable.
FileName const path_env = extract_env_var_dir("LYX_LOCALEDIR");
if (!path_env.empty() && check_env_var_dir(path_env, "LYX_LOCALEDIR"))
return path_env;
// 2. Search for system_support_dir / <relative locale dir>
// The <relative locale dir> is OS-dependent. (On Unix, it will
// be "../locale/".)
FileName path(addPath(system_support_dir.absFileName(),
relative_locale_dir()));
if (path.exists() && path.isDirectory())
return path;
// 3. Fall back to the hard-coded LOCALEDIR.
path = hardcoded_localedir();
if (path.exists() && path.isDirectory())
return path;
return FileName();
}
// Extracts the absolute path from the foo of "-sysdir foo" or "-userdir foo"
FileName const abs_path_from_command_line(string const & command_line)
{
if (command_line.empty())
return FileName();
string const str_path = fix_dir_name(command_line);
return makeAbsPath(str_path);
}
// Does the grunt work for abs_path_from_binary_name()
FileName const get_binary_path(string const & exe)
{
#if defined (USE_WINDOWS_PACKAGING)
// The executable may have been invoked either with or
// without the .exe extension.
// Ensure that it is present.
string const as_internal_path = os::internal_path(exe);
string const exe_path = suffixIs(as_internal_path, ".exe") ?
as_internal_path : as_internal_path + ".exe";
#else
string const exe_path = os::internal_path(exe);
#endif
if (FileName::isAbsolute(exe_path))
return FileName(exe_path);
// Two possibilities present themselves.
// 1. The binary is relative to the CWD.
FileName const abs_exe_path = makeAbsPath(exe_path);
if (abs_exe_path.exists())
return abs_exe_path;
// 2. exe must be the name of the binary only and it
// can be found on the PATH.
string const exe_name = onlyFileName(exe_path);
if (exe_name != exe_path)
return FileName();
vector<string> const path = getEnvPath("PATH");
vector<string>::const_iterator it = path.begin();
vector<string>::const_iterator const end = path.end();
for (; it != end; ++it) {
// This will do nothing if *it is already absolute.
string const exe_dir = makeAbsPath(*it).absFileName();
FileName const exe_path(addName(exe_dir, exe_name));
if (exe_path.exists())
return exe_path;
}
// Didn't find anything.
return FileName();
}
// Extracts the absolute path to the binary name received as argv[0].
FileName const abs_path_from_binary_name(string const & exe)
{
FileName const abs_binary = get_binary_path(exe);
if (abs_binary.empty()) {
// FIXME UNICODE
throw ExceptionMessage(ErrorException,
_("LyX binary not found"),
bformat(_("Unable to determine the path to the LyX binary from the command line %1$s"),
from_utf8(exe)));
}
return abs_binary;
}
// A plethora of directories is searched to ascertain the system
// lyxdir which is defined as the first directory to contain
// "chkconfig.ltx".
FileName const
get_system_support_dir(FileName const & abs_binary,
string const & command_line_system_support_dir)
{
string const chkconfig_ltx = "chkconfig.ltx";
// searched_dirs is used for diagnostic purposes only in the case
// that "chkconfig.ltx" is not found.
list<FileName> searched_dirs;
// 1. Use the -sysdir command line parameter.
FileName path = abs_path_from_command_line(command_line_system_support_dir);
if (!path.empty()) {
searched_dirs.push_back(path);
if (check_command_line_dir(path.absFileName(), chkconfig_ltx, "-sysdir"))
return path;
}
// 2. Use the "LYX_DIR_${major}${minor}x" environment variable.
path = extract_env_var_dir(LYX_DIR_VER);
if (!path.empty()) {
searched_dirs.push_back(path);
if (check_env_var_dir(path, chkconfig_ltx, LYX_DIR_VER))
return path;
}
// 3. Search relative to the lyx binary.
// We're looking for "chkconfig.ltx" in a directory
// OnlyPath(abs_binary) / <relative dir> / PACKAGE /
// PACKAGE is hardcoded in config.h. Eg "lyx" or "lyx-1.3.6cvs".
// <relative dir> is OS-dependent; on Unix, it will be "../share/".
string const relative_lyxdir = relative_system_support_dir();
// One subtlety to be aware of. The name of the lyx binary may be
// a symbolic link. If that is the case, then we follow the links too.
FileName binary = abs_binary;
while (true) {
// Try and find "chkconfig.ltx".
string const binary_dir = onlyPath(binary.absFileName());
FileName const lyxdir(addPath(binary_dir, relative_lyxdir));
searched_dirs.push_back(lyxdir);
if (!fileSearch(lyxdir.absFileName(), chkconfig_ltx).empty()) {
// Success! "chkconfig.ltx" has been found.
return lyxdir;
}
// Check whether binary is a symbolic link.
// If so, resolve it and repeat the exercise.
if (!binary.isSymLink())
break;
FileName link;
if (readLink(binary, link)) {
binary = link;
} else {
// Unable to resolve the link.
break;
}
}
// 4. Repeat the exercise on the directory itself.
FileName binary_dir(onlyPath(abs_binary.absFileName()));
while (true) {
// This time test whether the directory is a symbolic link
// *before* looking for "chkconfig.ltx".
// (We've looked relative to the original already.)
if (!binary.isSymLink())
break;
FileName link;
if (readLink(binary_dir, link)) {
binary_dir = link;
} else {
// Unable to resolve the link.
break;
}
// Try and find "chkconfig.ltx".
FileName const lyxdir(addPath(binary_dir.absFileName(),
relative_lyxdir));
searched_dirs.push_back(lyxdir);
if (!fileSearch(lyxdir.absFileName(), chkconfig_ltx).empty()) {
// Success! "chkconfig.ltx" has been found.
return lyxdir;
}
}
// 5. In desparation, try the hard-coded system support dir.
path = hardcoded_system_support_dir();
if (!fileSearch(path.absFileName(), chkconfig_ltx).empty())
return path;
// Everything has failed :-(
// So inform the user and exit.
string searched_dirs_str;
typedef list<FileName>::const_iterator iterator;
iterator const begin = searched_dirs.begin();
iterator const end = searched_dirs.end();
for (iterator it = begin; it != end; ++it) {
if (it != begin)
searched_dirs_str += "\n\t";
searched_dirs_str += it->absFileName();
}
// FIXME UNICODE
throw ExceptionMessage(ErrorException, _("No system directory"),
bformat(_("Unable to determine the system directory "
"having searched\n"
"\t%1$s\n"
"Use the '-sysdir' command line parameter or "
"set the environment variable\n%2$s "
"to the LyX system directory containing the "
"file `chkconfig.ltx'."),
from_utf8(searched_dirs_str), from_ascii(LYX_DIR_VER)));
// Keep the compiler happy.
return FileName();
}
// Returns the absolute path to the user lyxdir, together with a flag
// indicating whether this directory was specified explicitly (as -userdir
// or through an environment variable) or whether it was deduced.
bool userSupportDir(FileName const & default_user_support_dir,
string const & command_line_user_support_dir, FileName & result)
{
// 1. Use the -userdir command line parameter.
result = abs_path_from_command_line(command_line_user_support_dir);
if (!result.empty())
return true;
// 2. Use the LYX_USERDIR_${major}${minor}x environment variable.
result = extract_env_var_dir(LYX_USERDIR_VER);
if (!result.empty())
return true;
// 3. Use the OS-dependent default_user_support_dir
result = default_user_support_dir;
return false;
}
// $HOME/.lyx on POSIX but on Win32 it will be something like
// "C:/Documents and Settings/USERNAME/Application Data/LyX"
FileName const get_default_user_support_dir(FileName const & home_dir)
{
#if defined (USE_WINDOWS_PACKAGING)
(void)home_dir; // Silence warning about unused variable.
os::GetFolderPath win32_folder_path;
return FileName(addPath(win32_folder_path(os::GetFolderPath::APPDATA), PACKAGE));
#elif defined (USE_MACOSX_PACKAGING)
(void)home_dir; // Silence warning about unused variable.
FSRef fsref;
OSErr const error_code =
FSFindFolder(kUserDomain, kApplicationSupportFolderType,
kDontCreateFolder, &fsref);
if (error_code != 0)
return FileName();
// FSRefMakePath returns the result in utf8
char store[PATH_MAX + 1];
OSStatus const status_code =
FSRefMakePath(&fsref,
reinterpret_cast<UInt8*>(store), PATH_MAX);
if (status_code != 0)
return FileName();
return FileName(addPath(reinterpret_cast<char const *>(store), PACKAGE));
#else // USE_POSIX_PACKAGING
return FileName(addPath(home_dir.absFileName(), string(".") + PACKAGE));
#endif
}
// Check that directory @c dir contains @c file.
// Else emit an error message about an invalid @c command_line_switch.
bool check_command_line_dir(string const & dir,
string const & file,
string const & command_line_switch)
{
FileName const abs_path = fileSearch(dir, file);
if (abs_path.empty()) {
// FIXME UNICODE
throw ExceptionMessage(ErrorException, _("File not found"), bformat(
_("Invalid %1$s switch.\nDirectory %2$s does not contain %3$s."),
from_utf8(command_line_switch), from_utf8(dir),
from_utf8(file)));
}
return !abs_path.empty();
}
// The environment variable @c env_var expands to a (single) file path.
FileName const extract_env_var_dir(string const & env_var)
{
string const dir = fix_dir_name(getEnv(env_var));
return dir.empty() ? FileName() : makeAbsPath(dir);
}
// Check that directory @c dir contains @c file.
// Else emit a warning about an invalid @c env_var.
bool check_env_var_dir(FileName const & dir,
string const & file,
string const & env_var)
{
FileName const abs_path = fileSearch(dir.absFileName(), file);
if (abs_path.empty()) {
// FIXME UNICODE
throw ExceptionMessage(WarningException, _("File not found"), bformat(
_("Invalid %1$s environment variable.\n"
"Directory %2$s does not contain %3$s."),
from_utf8(env_var), from_utf8(dir.absFileName()),
from_utf8(file)));
}
return !abs_path.empty();
}
// Check that directory @c dir is indeed a directory.
// Else emit a warning about an invalid @c env_var.
bool check_env_var_dir(FileName const & dir,
string const & env_var)
{
bool const success = dir.exists() && dir.isDirectory();
if (!success) {
// Put this string on a single line so that the gettext
// search mechanism in po/Makefile.in.in will register
// Package.cpp.in as a file containing strings that need
// translation.
// FIXME UNICODE
docstring const fmt =
_("Invalid %1$s environment variable.\n%2$s is not a directory.");
throw ExceptionMessage(WarningException, _("Directory not found"), bformat(
fmt, from_utf8(env_var), from_utf8(dir.absFileName())));
}
return success;
}
// The locale directory relative to the LyX system directory.
string const relative_locale_dir()
{
#if defined (USE_WINDOWS_PACKAGING) || defined (USE_MACOSX_PACKAGING)
return "locale/";
#else
return "../locale/";
#endif
}
// The system lyxdir is relative to the directory containing the LyX binary.
string const relative_system_support_dir()
{
string result;
#if defined (USE_WINDOWS_PACKAGING) || defined (USE_MACOSX_PACKAGING)
result = "../Resources/";
#else // Posix-like.
result = addPath("../share/", PACKAGE);
#endif
return result;
}
} // namespace anon
} // namespace support
} // namespace lyx