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variable. This is done in the preferences, much like as the PATH prefix. A single '.' in the paths will get replaced with the current document dir and also non-absolute paths will be prefixed with that dir. The default semantics of TEXINPUTS apply, such that, for example, if a path is terminated with a double slash, all subdirectories will be also searched by both the TeX engine and ancillary programs such as dvi previewers or dvips. As an example, if the prefix is set to ".:figs", the TEXINPUTS variable will be set as ".:<docdir>:<docdir>/figs:$ORIGTEXINPUTS", where <docdir> is the document directory. The initial '.' is necessary to address the actual current dir (this will be the temp dir at preview time), while if TEXINPUTS was initially unset, such that $ORIGTEXINPUTS is empty, a colon (or semicolon on Windows) will end the path list. This is very important, because we don't want to replace the system directories but to complement them and, in order to do that, an empty element has to be present in the list. Indeed, according to the TEXINPUTS semantics, an empty element means the standard search path. This works whether TEXINPUTS is originally set or not, because if the original TEXINPUTS starts with a colon (meaning that the standard search path is wanted there) we will have an empty element at that point, otherwise the final colon will simply serve as a path separator. Of course, on Windows a ';' has to be used as a path separator. LyX will take care of transforming the platform path list into one understandable by the TeX engine. For example, this will be the case for a Cygwin version of LyX using a native Windows TeX engine or viceversa. I tested all of this and it works for me. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@38681 a592a061-630c-0410-9148-cb99ea01b6c8
56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
// -*- C++ -*-
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/**
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* \file Systemcall.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Asger Alstrup
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*
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* Interface cleaned up by
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* \author Angus Leeming
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef SYSTEMCALL_H
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#define SYSTEMCALL_H
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#include <string>
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namespace lyx {
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namespace support {
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/**
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* An instance of Class Systemcall represents a single child process.
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*
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* Class Systemcall uses system() to launch the child process.
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* The user can choose to wait or not wait for the process to complete, but no
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* callback is invoked upon completion of the child.
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*
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* The child process is not killed when the Systemcall instance goes out of
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* scope.
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*/
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class Systemcall {
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public:
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/// whether to wait for completion
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enum Starttype {
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Wait, //< wait for completion before returning from startscript()
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DontWait //< don't wait for completion
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};
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/** Start child process.
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* The string "what" contains a commandline with arguments separated
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* by spaces. The string "path" contains the path to be prepended to
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* the TEXINPUTS environment variable. Unset "process_events" in
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* case UI should be blocked while processing the external command.
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*/
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int startscript(Starttype how, std::string const & what,
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std::string const & path = empty_string(),
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bool process_events = false);
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};
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} // namespace support
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} // namespace lyx
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#endif // SYSTEMCALL_H
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