% This is README The PATCHWORK system consists of two programs KNIT a version of TANGLE that can handle multiple changefiles TWIST a version of WEAVE that can handle multiple changefile and PATHCHMAC.TEX a modified version of WEBMAC.TEX which must be used for TeX'ing the output of TWIST. To install the system you should proceed as follows. (The description is for SUN UNIX but an implementation on other UNIX systems or even non-UNIX systems should be possible without major problems.) 1. Make a new directory with the files knit.ch twist.ch patchmac.tex demo.web demo.ch1 demo.ch2 demo.ch3 and copy (temporarily) also tangle.web weave.web which you will surely have already. 2. Tangle tangle.web with knit.ch giving you tangle.p: tangle tangle.web knit.ch 3. Rename tangle.p to knit.p and compile it. mv tangle.p. knit.p; pc -o knit knit.p 4. If your compiler complains you should modify knit.ch (after you have saved the original version). All the necessary modifications should be found in your local tangle.ch. Then start at step 2 again. (You should record all changes to knit.ch in a separate changefile which you might call knit.ch.local. If you have successfully installed knit and twist later on, you can reproduce knit from tangle with the original (system-independent) knit.ch and your (system-dependent) knit.ch.local, e.g., knit tangle.web knit.ch knit.ch.local For obvious reasons, the orinal knit.ch is not completely system- independent, but it is a version with works for SUN UNIX. However, the system-dependencies are rather small.) 5. Repeat steps 2 to 4 correspondingly for weave and twist: tangle weave.web twist.ch mv weave.p twist.p; pc -o twist twist.p 6. You now have a first version of the PATCHMAC system and might want to test how it works: ln demo.web webfile ln demo.ch1 chfile1 ln demo.ch2 chfile2 ln demo.ch3 chfile3 knit mv Pascalfile demo.p; pc -o demo demo.p demo and you should see on your terminal I am line1 from changefile1 I am line2 from changefile1 I am line3 from changefile1 I am line4 from changefile1 I am line3 I am line2 from changefile3 I am line3 from changefile3 I am line7 I am line8 I am line9 I am line2 from changefile2 I am line3 from changefile2 I am line4 from changefile3 I am line12 Afterwards you could run twist and TeX it's output: twist mv texfile demo.tex; tex demo [print or preview it] 7. As you will have noticed in step 6, these versions of twist and knit are rather simple and do not allow the usual parsing of the command line as your tangle and weave will probably do, i.e., the file names for twist and knit have to be webfile chfile1 chfile2 chfile3 Since you will probably not like this you could write, as a first exercise, two changefiles, say knit.ch.args twist.ch.args which implement the parsing of the arguments in the command line. With ln tangle.web webfile ln knit.ch chfile1 ln knit.ch.args chfile2 knit mv Pascalfile knit.p pc -o knit knit.p (and a similar procedure for twist) you then will get a version of knit (and twist) which allows the usual usuage: knit name_of_webfile name_of_first_cf name_of_second_cf ... Wolfgang Appelt GMD Schlo\ss Birlinghoven Postfach 1240 D-5205 Sankt Augustin Germany FR 19 October 1988
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knit – Tangle and weave with multiple change files
Knit and twist are represented as change files from tangle and weave (respectively). In each case, they act in the same way as the parent program, but can process more than one change file at the same time.