#!/bin/sh
##
## SCRIPT: 02_extractFromSelf_code_forCat2tarfile_ofXpgDirs.sh
##
## PURPOSE: Extracts all the bytes after the bottom of this script, that is,
##          after the last statement, 'exit'.
##            Puts the bytes into a temp file. Then unzips and untars that '.tgz'
##            file into a specified install directory, in $HOME/apps.
##          Finishes by copying a few files into a $HOME/.freedomenv dir and
##          then making a few links in $HOME/apps/bin.
##
##          Makes directories of $HOME as needed --- $HOME/apps and $HOME/apps/bin.
##
##          To do the extract, this script
##          uses 'tail -n +LINENUM', where LINENUM is the
##          number of lines to the bottom of this script, plus 1.
##
##**********************************************************************************
## ******* NOTE!!! If you edit this script, RESET that LINENUM number, if need be!!!
##**********************************************************************************
## ******* ALSO!!! Set the yyyymmdd DATE, that you want to use, in INSTALLDIR!!!!!!!
##**********************************************************************************
##
##          This script is meant to be concatenated with a
##          gzipped tar file --- making a new script file.
##
##          (Do chmod 755 on that new file, to do the install with that combined
##           script-and-gzipped-tar file.)
##
##       Example of making the self-extracting install script
##       (continued onto a 2nd line):
##
##       1) cat 02_extractFromSelf_code_forCat2tarfile_ofXpgDirs.sh xpg_yyyymmmdd.tar.gz \
##          > extractFromSelf_XpgFiles_yyyymmmdd.sh
##
##     Let's say yyyymmdd is 2010aug27.
##     For the user to do an install, 
##     after download of extractFromSelf_XpgFiles_2010aug27.sh, user does
##     2) chmod 755 extractFromSelf_XpgFiles_2010aug27.sh
##
##     Then, for the user to do an install, from any dir, run
##     3) ./extractFromSelf_XpgFiles_2010aug27.sh
##
##     That self-extracting script file, when run by the user-installer, as
##     indicated by steps 2 and 3 above, is then supposed to extract the bytes
##     of the tar-gzipped file and put it into a temp file in /tmp.
##     Tnen the script untars the temp file into the install directory, in the
##     'apps' directory of the user's home directory --- and makes a soft-link
##     to a few executables (scripts), in the $HOME/apps/bin directory.
##
## Started: 2010may02 For NautilusScriptsFE install build.
## Changed: 2010aug27 Changed to create an 'xpg' 2010aug27 install file.
## Changed: 2010aug30 Changed to create an 'xpg' 2010aug30 install file.
## Changed: 2010sep03 Added statements to cp 'set_FEDIR.shi' file from
##                    'includes_sh' dir to $HOME/.freedomenv/1/, after
##                    making the latter dir. Chgd LINENUM accordingly.
## Changed: 2010sep07 Added statements to cp 'set_feDIR.tki' file from
##                    'includes_tk' dir to $HOME/.freedomenv/1/, after
##                    making the latter dir. Chgd LINENUM accordingly.
## Changed: 2011jan31 Added statements to make $HOME/apps/bin if need be,
##                    and make soft-links to main scripts via 'ln -s'.
## Changed: 2011may19 Chgd $HOME/.freedomenv/1/ to $HOME/.freedomenv/feXpg/. 
## Changed: 2011jul31 Chgd $HOME/.freedomenv/feXpg/ to $HOME/.freedomenv/common/.

## FOR TESTING: (show statements as they execute, during an install-build)
  set -x

##############################################
## Make the $HOME/apps dir for the user,
## if none exists.
##############################################

DIR_HOMEAPPS="$HOME/apps"

if test ! -d "$DIR_HOMEAPPS"
then
   mkdir "$DIR_HOMEAPPS"
   chmod 755 "$DIR_HOMEAPPS"
fi

##############################################
## If the dir $HOME/apps is not writable, exit
## --- something is wrong. Probably the user
## has a $HOME/apps dir with wrong permissions.
##############################################

if test ! -w "$DIR_HOMEAPPS"
then
   echo "
No write permission to directory $DIR_HOMEAPPS.
Exiting.
"
   read ANY_KEY_to_exit
   exit
fi

##*****************************************************
## We set the INSTALLDIR for the particular ******!!!!!
## application being installed. ******************!!!!!
## ****************************************************
## ** CHECK THIS STATEMENT (esp. release ID)  ****!!!!!
## ** before using this script !!!!!!!!!!!!!!!!!!!!!!!!
##*****************************************************

INSTALLDIR="${DIR_HOMEAPPS}/feXpg_2011oct05"


##############################################
## If the $INSTALLDIR already exists,
## exit.
##############################################

if test -d "$INSTALLDIR"
then
   echo "
The install directory $INSTALLDIR already exits.
Aborting the install --- exiting the install script.
Rename or remove the existing directory.
"
   read ANY_KEY_to_exit
   exit
fi

##############################################
## Make the $INSTALLDIR for the user,
## if none exists.
##############################################

if test ! -d "$INSTALLDIR"
then
   mkdir "$INSTALLDIR"
   chmod 755 "$INSTALLDIR"
fi

######################################################
## The following several statements extract the bottom
## of this script (a tar file concatenated to this
## script) --- at user install time ---
## into a file like
##       /tmp/TEMP_[appname]_tarfile.tgz
#################################################

OUTFILE="/tmp/TEMP_Xpg_tarfile.tgz"

##****************************************************
## NOTE!!! After all editing is done to this file,!!!!
## LINENUM var should be set to the number of lines!!!
## in this file, PLUS ONE. ***************************
##   (Maybe someday we will set this automatically,!!!
##    by reading $0 and finding '^exit$'.)         !!!
##****************************************************

LINENUM=247

tail -n +$LINENUM "$0" > "$OUTFILE"


######################################################
## The following several statements help check the
## extracted file, to see that it contains the proper
## data.
######################################################

## Check the file type of the extracted file: 
## Is it recognized as a gzipped tar??
file "$OUTFILE"

## Check the size (bytes) of the extracted file: 
## Is it the same as the original gzipped tar file??
ls -l "$OUTFILE"

## Check the table of contents ('t') of the extracted file.
## Do all directories and files have proper permissions?
## For example, do directories have read-write (5) permissions?
tar ztvf "$OUTFILE"


######################################################
## EXTRACT THE temp 'tar.gz' FILE INTO THE INSTALL DIR.
######################################################

if test -d "$INSTALLDIR"
then
   cd "$INSTALLDIR"
   tar zxvf "$OUTFILE"
fi


##################################################
## Make the $HOME/.freedomenv/common/ and
## $HOME/.freedomenv/feXpg/ dirs for the
## 'set_FEDIR.shi' and 'set_feDIR.tki' files,
## if none exists.
## Copy the '.shi' and '.tki' files into that dir.
##################################################

DIR_DOTFREEDOM="$HOME/.freedomenv"

if test ! -d "$DIR_DOTFREEDOM"
then
   mkdir "$DIR_DOTFREEDOM"
   chmod 755 "$DIR_DOTFREEDOM"
fi

DIR_DOTFREEDOM1="${DIR_DOTFREEDOM}/common"
if test ! -d "$DIR_DOTFREEDOM1"
then
   mkdir "$DIR_DOTFREEDOM1"
   chmod 755 "$DIR_DOTFREEDOM1"
fi

DIR_DOTFREEDOM2="${DIR_DOTFREEDOM}/feXpg"
if test ! -d "$DIR_DOTFREEDOM2"
then
   mkdir "$DIR_DOTFREEDOM2"
   chmod 755 "$DIR_DOTFREEDOM2"
fi

cp "${INSTALLDIR}/includes_sh/set_FEDIR.shi" "$DIR_DOTFREEDOM1"
cp "${INSTALLDIR}/includes_tk/set_feDIR.tki" "$DIR_DOTFREEDOM1"

cp "${INSTALLDIR}/includes_sh/set_FEDIR.shi" "$DIR_DOTFREEDOM2"
cp "${INSTALLDIR}/includes_tk/set_feDIR.tki" "$DIR_DOTFREEDOM2"


#######################################################
## Make the $HOME/apps/bin/ dir, if none exists.
## And make the soft-link(s) to the main executable(s)
## in that 'bin' dir.
######################################################

DIR_APPS_BIN="$HOME/apps/bin"

if test ! -d "$DIR_APPS_BIN"
then
   mkdir "$DIR_APPS_BIN"
   chmod 755 "$DIR_APPS_BIN"
fi

ln -s -f "${INSTALLDIR}/scripts/xpg" "${DIR_APPS_BIN}/xpg"
ln -s -f "${INSTALLDIR}/scripts/fecolorsel" "${DIR_APPS_BIN}/fecolorsel"
ln -s -f "${INSTALLDIR}/scripts/fefontsel" "${DIR_APPS_BIN}/fefontsel"

read ANY_KEY_to_exit

exit