NOWEB(1)NOWEB(1)NAMEnoindex - build external index for noweb document
SYNOPSISnoindex basename[.tex]
DESCRIPTIONnoindex looks through LaTeX .aux files for identifiers that should go
in a noweb external index. It sorts all identifiers and writes the
results on basename.nwi.
NOWEB INDEXING STRATEGIES
A noweb program consists of one or more files. In the simple case,
these files are run through noweave together, to produce a single LaTeX
file. noweave -index suffices to produce an index and cross-referenc‐
ing information; neither nodefs nor noindex is required.
When a noweb program consists of several source files, it is often bet‐
ter to run each source file through noweave to produce its own LaTeX
file, then use noindex to produce an external index. This technique
has several advantages:
The line numbers in the LaTeX files correspond to the line num‐
bers in the source files, so it is easier to diagnose LaTeX
errors.
The LaTeX \includeonly feature can be used, making it possible
to format parts of large programs while retaining complete
cross-reference information.
When used with make(1), the technique avoids running noweave
over source files that have not changed.
Using the external index places fewer demands on LaTeX's memory,
making it read its .aux files much more quickly.
The disadvantages are that nodefs and noindex are needed for full
cross-referencing and a properly sorted index.
EXAMPLE
This example assumes a noweb program of three source files: a.nw , b.nw
, and c.nw. The file doc.tex is assumed to contain LaTeX boilerplate,
including the commands
\noweboptions{externalindex}
\include{a}
\include{b}
\include{c}
The first sequence of steps is to create a file listing all the identi‐
fiers defined anywhere in a, b, or c.
nodefs a.nw > a.defs
nodefs b.nw > b.defs
nodefs c.nw > c.defs
sort -u a.defs b.defs c.defs | cpif all.defs
Using sort -u and cpif(1) avoids changing all.defs unless the set of
identifiers changes. This technique, used in a Makefile, avoids unnec‐
essary rebuilding.
The next series of steps is to create LaTeX files with full cross-ref‐
erence information for all identifiers.
noweave -n -indexfrom all.defs a.nw > a.tex
noweave -n -indexfrom all.defs b.nw > b.tex
noweave -n -indexfrom all.defs c.nw > c.tex
The final steps run LaTeX once to create .aux files, then noindex to
create the index, then LaTeX again to format the complete document.
latex doc
noindex doc
latex doc
In a Makefile, noindex can be run before every invocation of LaTeX.
BUGSnoindex is distributed in awk and Icon versions. The awk version is
slow and does a poorer job sorting.
There is no comparable machinery to make it possible to use multiple
files with the HTML back end.
SEE ALSOnoweave(1), nodefs(1), cpif(1)VERSION
This man page is from noweb version 2.11b.
AUTHOR
Norman Ramsey, Harvard University. Internet address nr@eecs.har‐
vard.edu.
Noweb home page at http://www.eecs.harvard.edu/~nr/noweb.
local 3/28/2001 NOWEB(1)
