the purpose of this project is quality ensurance for variants of cweb.
cweb is a major representative of the literate programming paradigm. its creator, donald ervin knuth, used it mainly for two large sets of well-documented software systems:
in addition, don knuth uses cweb for many more smaller programs that are used as exemplary implementations of algorithms, mostly from TAOCP.
cweb itself is 'frozen' (unless catastrophic bugs are found), but developers are encouraged to work with the sources and improve or extend them. however, don knuth requests that such modified versions of cweb "don't screw up [these example programs] any more than they would screw up today!"
and some of these example programs are "really OLD indeed. [...] they should be read but not executed!"
start with git clone https://github.com/ascherer/cwebtest. the default branch
master is used to set up the environment by extracting the full set of
knuthian example programs. if you want to cross-check with stanford, use the
local ./downloadable-programs.sh --get and gzip -d on all gzipped master
sources.
now invoke ./runall.sh -p <PATH TO YOUR CWEB> -v <VERSION OF YOUR CWEB>.
this will create a new branch with this commandline as its name by applying
ctangle and cweave on all .w sources (ca. 250 commits at the time
of writing). to see the differences just compare the heads of such branches.
if you care about modified versions of some of the example programs, you can
add the -c option to the ./runall.sh commandline, which applies (most of)
the changefiles available and adds -changes to the created test branch name.
there is an accompanying option -e that applies some "extra" change files
(and activates -c as well).
if you want to run tests with a subset of one (on systems with "classic"
getopt) or more (on systems with enhanced linux-getopt) cweb source files,
you can use option -f with a single file name or a stringified list of
several file names.