# 1  Running TeX2page

TeX2page is invoked in much the same way as plain TeX or LaTeX.1 Recall how these programs are called: Given a TeX source file with the relative or full pathname wherever-it-is/jobname.ext, where jobname is the basename of the file and .ext is its extension, you type either

tex wherever-it-is/jobname.ext


or

latex wherever-it-is/jobname.ext


at the operating-system command line. You do not need to mention the extension .ext if it is .tex. This creates the output DVI file, jobname.dvi, in the working directory.

TeX2page is called analogously. To create the HTML version of the same file wherever-it-is/jobname.ext, type

tex2page wherever-it-is/jobname.ext


Again, the .ext is optional if it is .tex. This creates jobname.html in the working directory.

To try this out, copy into your working directory the example file story.tex provided in all TeX distributions. Call TeX2page on it:

tex2page story


TeX2page will get cracking on story.tex, providing the following commentary, or log, on your console:

This is TeX2page, Version 4p4k3 (MzScheme 200, unix)
(story.tex)
[0]
Output written on story.html (1 page).


TeX2page is now done, and the result of its labors is the HTML file story.html (click to see).

The log file story.hlog contains a copy of the above log, and is useful if you didn't or couldn't keep track of the console (perhaps because the log was too long). The log says that story.tex lacked a document-ending command such as \end (or \bye) and that TeX2page assumed one anyway. Also, only one HTML page was created, and its name is story.html. TeX2page could in some cases produce auxiliary HTML pages in addition to the main HTML page jobname.html (especially for larger documents). The auxiliary HTML pages are reachable from jobname.html by navigation links (sec 3.1). As each auxiliary HTML page is completed, the log will show the bracketed numbers [1], [2], etc. The [0] in this log refers to the only HTML file created, viz, story.html.

All this is of course almost exactly analogous to the way you type tex story to get story.dvi from story.tex, with the log going into story.log.

This is TeX, Version 3.14159 (Web2C 7.3.1) (format=tex 2001.9.7)  24 FEB 2002 15:50
**story
(story.tex [1])
*\bye
Output written on story.dvi (1 page, 668 bytes).


The only real difference is that TeX will not add the missing \end on its own, but instead waits for the user to supply it explicitly from the console.2 Note that the bracketed numbers now refer to physical pages.

Thus, from one TeX source file, you can get both a printable .dvi and a browsable .html document, using the same calling conventions.

As with TeX, the filenames encountered by TeX2page in the document are first looked for relative to the working directory. If not found there, they are looked for in the directories listed in the environment variable TIIPINPUTS. This is analogous to TeX looking for files in TEXINPUTS.3

Error recovery in TeX2page is also exactly analogous to TeX, but we will postpone that discussion to sec 10.

## 1.1  Non-file arguments

Like most recent versions of TeX, TeX2page also supports the standard self-identification arguments --help and --version. These arguments elicit help only if there isn't an input file (eg, --help.tex) that could match them.

TeX2page called without an argument displays a help message and exits. Unlike TeX, TeX2page will not try to conjure up an input document based purely on console chitchat with an increasingly befuddled user.

In all these cases, the help displayed on the console is also saved in the specially named log file texput.hlog.

## 1.2  Calling TeX2page from Scheme

You may load the library tex2page.ss into Scheme and call the procedure tex2page with the name of the TeX file as argument:

(require (lib "tex2page.ss" "tex2page"))

(tex2page filename)


You can call the procedure tex2page several times from the same Scheme session, on the same file or on different files.

## 1.3  Specifying a target directory

By default, TeX2page generates the output HTML files and other auxiliary files (sec A) in the current working directory. You can tell TeX2page to place its output and auxiliary files in a different directory and thus avoid cluttering up your working directory.

The files used for specifying the target directory are: jobname.hdir in the working directory, .tex2page.hdir in the working directory, and .tex2page.hdir in the user's HOME directory. The first line of the first of these files that exists is taken to be the name of the target directory. If none of the files exists, the current working directory is the target directory.

For example, if story.hdir contains the filename story as its first line, the HTML and aux files are created in a subdirectory story of the current directory.

The filename may contain the TeX control sequence \jobname, which expands to the basename of the TeX document. To always use an auxiliary subdirectory with the same name as the basename of the TeX document, have ~/.tex2page.hdir contain the line \jobname'' (without quotes).

1 Hereafter, we will use TeX to mean any format of TeX, and plain TeX when we specifically mean the plain'' format.

2 The file story.tex lacks an \end only to demonstrate some interactive capabilities of TeX, which are not relevant for TeX2page.

3 The TEXINPUTS value can use a quite complicated syntax, which is why TeX2page uses its own environment variable instead of simply reusing TeX's TEXINPUTS. However, to make a virtue out of a necessity, it is quite unnecessary for TeX2page to attempt parsing most of the TeX files that are accessible via TEXINPUTS. Furthermore, you can have files in TIIPINPUTS usefully shadow files from TEXINPUTS.