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#!/bin/sh
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## R_HOME/bin/massage-Examples
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## Given a list of files of the form .../.../<name>.R, produce one large
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## file, i.e. write to stdout, `cat'ting the files together with
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## 1) Putting a HEADER in front
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## 2) Wrapping every file in order to be more order independent
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## 3) appending a FOOTER ...
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## Should work WHEREVER this is called from :
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(cd `dirname $0`/..
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  R_HOME=`pwd`; export R_HOME
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)
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R_HOME=`cd ${R_HOME}; pwd`	# absolute
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PKG=${1}; shift; FILES="${@}"
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## 1) ---- Header ----
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(cat <<_EOF_
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attach(NULL, name = "CheckExEnv")
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assign(".CheckExEnv", pos.to.env(2), pos = length(search()))
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assign("ptime", proc.time(), env = .CheckExEnv)
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postscript("PKG-Examples.ps")
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assign("par.postscript", par(no.readonly = TRUE), env = .CheckExEnv)
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options(contrasts = c(unordered = "contr.treatment", ordered = "contr.poly"))
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_EOF_
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) | sed "s/PKG/${PKG}/"
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if [ "${PKG}" != "base" ]; then echo "library('${PKG}')" ; fi
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## 2) ---- edit a few of these files:
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for file in ${FILES}
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do
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  bf=`basename $file .R`
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  if test -n "`grep '_ Examples _' $file`"; then
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    echo "rm(list = ls(all = TRUE)); .Random.seed <- c(0,rep(7654,3))"
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  fi
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  cat ${file}
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  if test -n "`grep 'par(' ${file}`"; then
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    ## if there were 'par(..)' calls, now reset them:
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    echo 'par(get("par.postscript", env = .CheckExEnv))'
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  fi
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  if test -n "`grep 'options(contrasts' ${file}`"; then
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    ## if contrasts were set, now reset them:
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    echo 'options(contrasts = c(unordered = "contr.treatment", ordered = "contr.poly"))'
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  fi
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done
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## 3) ---- Footer ----
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cat <<_EOF_
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cat("Time elapsed: ", proc.time() - get("ptime", env = .CheckExEnv),"\n")
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dev.off(); quit('no')
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_EOF_