Multiple versions of the Python module with the same name - symlink based approach

#!/bin/sh
# This is a shell archive (produced by GNU sharutils 4.15.2).
# To extract the files from this archive, save it to some FILE, remove
# everything before the '#!/bin/sh' line above, then type 'sh FILE'.
#
lock_dir=_sh15625
# Made on 2021-06-28 21:33 CEST by <wzab@wzab>.
# Source directory was '/tmp/demo'.
#
# Existing files will *not* be overwritten, unless '-c' is specified.
#
# This shar contains:
# length mode       name
# ------ ---------- ------------------------------------------
#     40 -rw-r--r-- xt1/very/long/path/agwb/agwb.py
#     15 -rw-r--r-- xt1/very/long/path/agwb/top_const.py
#     79 -rw-r--r-- xt1/very/long/path/agwb/__init__.py
#    210 -rw-r--r-- xt1/very/long/path/agwb/top_v0.py
#   1383 -rw-r--r-- load_demo.py
#     40 -rw-r--r-- xt2/completely/different/path/agwb/agwb.py
#     15 -rw-r--r-- xt2/completely/different/path/agwb/top_const.py
#     79 -rw-r--r-- xt2/completely/different/path/agwb/__init__.py
#    209 -rw-r--r-- xt2/completely/different/path/agwb/top_v0.py
#
MD5SUM=${MD5SUM-md5sum}
f=`${MD5SUM} --version | egrep '^md5sum .*(core|text)utils'`
test -n "${f}" && md5check=true || md5check=false
${md5check} || \
  echo 'Note: not verifying md5sums.  Consider installing GNU coreutils.'
if test "X$1" = "X-c"
then keep_file=''
else keep_file=true
fi
echo=echo
save_IFS="${IFS}"
IFS="${IFS}:"
gettext_dir=
locale_dir=
set_echo=false

for dir in $PATH
do
  if test -f $dir/gettext \
     && ($dir/gettext --version >/dev/null 2>&1)
  then
    case `$dir/gettext --version 2>&1 | sed 1q` in
      *GNU*) gettext_dir=$dir
      set_echo=true
      break ;;
    esac
  fi
done

if ${set_echo}
then
  set_echo=false
  for dir in $PATH
  do
    if test -f $dir/shar \
       && ($dir/shar --print-text-domain-dir >/dev/null 2>&1)
    then
      locale_dir=`$dir/shar --print-text-domain-dir`
      set_echo=true
      break
    fi
  done

  if ${set_echo}
  then
    TEXTDOMAINDIR=$locale_dir
    export TEXTDOMAINDIR
    TEXTDOMAIN=sharutils
    export TEXTDOMAIN
    echo="$gettext_dir/gettext -s"
  fi
fi
IFS="$save_IFS"
if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null
then if (echo -n test; echo 1,2,3) | grep n >/dev/null
     then shar_n= shar_c='
'
     else shar_n=-n shar_c= ; fi
else shar_n= shar_c='\c' ; fi
f=shar-touch.$$
st1=200112312359.59
st2=123123592001.59
st2tr=123123592001.5 # old SysV 14-char limit
st3=1231235901

if   touch -am -t ${st1} ${f} >/dev/null 2>&1 && \
     test ! -f ${st1} && test -f ${f}; then
  shar_touch='touch -am -t $1$2$3$4$5$6.$7 "$8"'

elif touch -am ${st2} ${f} >/dev/null 2>&1 && \
     test ! -f ${st2} && test ! -f ${st2tr} && test -f ${f}; then
  shar_touch='touch -am $3$4$5$6$1$2.$7 "$8"'

elif touch -am ${st3} ${f} >/dev/null 2>&1 && \
     test ! -f ${st3} && test -f ${f}; then
  shar_touch='touch -am $3$4$5$6$2 "$8"'

else
  shar_touch=:
  echo
  ${echo} 'WARNING: not restoring timestamps.  Consider getting and
installing GNU '\''touch'\'', distributed in GNU coreutils...'
  echo
fi
rm -f ${st1} ${st2} ${st2tr} ${st3} ${f}
#
if test ! -d ${lock_dir} ; then :
else ${echo} "lock directory ${lock_dir} exists"
     exit 1
fi
if mkdir ${lock_dir}
then ${echo} "x - created lock directory ${lock_dir}."
else ${echo} "x - failed to create lock directory ${lock_dir}."
     exit 1
fi
# ============= xt1/very/long/path/agwb/agwb.py ==============
if test ! -d 'xt1'; then
  mkdir 'xt1'
if test $? -eq 0
then ${echo} "x - created directory xt1."
else ${echo} "x - failed to create directory xt1."
     exit 1
fi
fi
if test ! -d 'xt1/very'; then
  mkdir 'xt1/very'
if test $? -eq 0
then ${echo} "x - created directory xt1/very."
else ${echo} "x - failed to create directory xt1/very."
     exit 1
fi
fi
if test ! -d 'xt1/very/long'; then
  mkdir 'xt1/very/long'
if test $? -eq 0
then ${echo} "x - created directory xt1/very/long."
else ${echo} "x - failed to create directory xt1/very/long."
     exit 1
fi
fi
if test ! -d 'xt1/very/long/path'; then
  mkdir 'xt1/very/long/path'
if test $? -eq 0
then ${echo} "x - created directory xt1/very/long/path."
else ${echo} "x - failed to create directory xt1/very/long/path."
     exit 1
fi
fi
if test ! -d 'xt1/very/long/path/agwb'; then
  mkdir 'xt1/very/long/path/agwb'
if test $? -eq 0
then ${echo} "x - created directory xt1/very/long/path/agwb."
else ${echo} "x - failed to create directory xt1/very/long/path/agwb."
     exit 1
fi
fi
if test -n "${keep_file}" && test -f 'xt1/very/long/path/agwb/agwb.py'
then
${echo} "x - SKIPPING xt1/very/long/path/agwb/agwb.py (file already exists)"

else
${echo} "x - extracting xt1/very/long/path/agwb/agwb.py (text)"
  sed 's/^X//' << 'SHAR_EOF' > 'xt1/very/long/path/agwb/agwb.py' &&
desc="That's version from directory t1"
SHAR_EOF
  (set 20 21 06 28 00 37 53 'xt1/very/long/path/agwb/agwb.py'
   eval "${shar_touch}") && \
  chmod 0644 'xt1/very/long/path/agwb/agwb.py'
if test $? -ne 0
then ${echo} "restore of xt1/very/long/path/agwb/agwb.py failed"
fi
  if ${md5check}
  then (
       ${MD5SUM} -c >/dev/null 2>&1 || ${echo} 'xt1/very/long/path/agwb/agwb.py': 'MD5 check failed'
       ) << \SHAR_EOF
034b71c5fe1062ac88a80783dbcd9169  xt1/very/long/path/agwb/agwb.py
SHAR_EOF

else
test `LC_ALL=C wc -c < 'xt1/very/long/path/agwb/agwb.py'` -ne 40 && \
  ${echo} "restoration warning:  size of 'xt1/very/long/path/agwb/agwb.py' is not 40"
  fi
fi
# ============= xt1/very/long/path/agwb/top_const.py ==============
if test ! -d 'xt1/very/long/path/agwb'; then
  mkdir 'xt1/very/long/path/agwb'
if test $? -eq 0
then ${echo} "x - created directory xt1/very/long/path/agwb."
else ${echo} "x - failed to create directory xt1/very/long/path/agwb."
     exit 1
fi
fi
if test -n "${keep_file}" && test -f 'xt1/very/long/path/agwb/top_const.py'
then
${echo} "x - SKIPPING xt1/very/long/path/agwb/top_const.py (file already exists)"

else
${echo} "x - extracting xt1/very/long/path/agwb/top_const.py (text)"
  sed 's/^X//' << 'SHAR_EOF' > 'xt1/very/long/path/agwb/top_const.py' &&
C_TYPE_ID=1111
SHAR_EOF
  (set 20 21 06 28 00 38 30 'xt1/very/long/path/agwb/top_const.py'
   eval "${shar_touch}") && \
  chmod 0644 'xt1/very/long/path/agwb/top_const.py'
if test $? -ne 0
then ${echo} "restore of xt1/very/long/path/agwb/top_const.py failed"
fi
  if ${md5check}
  then (
       ${MD5SUM} -c >/dev/null 2>&1 || ${echo} 'xt1/very/long/path/agwb/top_const.py': 'MD5 check failed'
       ) << \SHAR_EOF
0ab74f53f6cd78d10d350d28ac06ecd8  xt1/very/long/path/agwb/top_const.py
SHAR_EOF

else
test `LC_ALL=C wc -c < 'xt1/very/long/path/agwb/top_const.py'` -ne 15 && \
  ${echo} "restoration warning:  size of 'xt1/very/long/path/agwb/top_const.py' is not 15"
  fi
fi
# ============= xt1/very/long/path/agwb/__init__.py ==============
if test -n "${keep_file}" && test -f 'xt1/very/long/path/agwb/__init__.py'
then
${echo} "x - SKIPPING xt1/very/long/path/agwb/__init__.py (file already exists)"

else
${echo} "x - extracting xt1/very/long/path/agwb/__init__.py (text)"
  sed 's/^X//' << 'SHAR_EOF' > 'xt1/very/long/path/agwb/__init__.py' &&
from .agwb import *
from .top_const import *
from .top_v0 import top as top_v0
SHAR_EOF
  (set 20 21 06 28 00 46 37 'xt1/very/long/path/agwb/__init__.py'
   eval "${shar_touch}") && \
  chmod 0644 'xt1/very/long/path/agwb/__init__.py'
if test $? -ne 0
then ${echo} "restore of xt1/very/long/path/agwb/__init__.py failed"
fi
  if ${md5check}
  then (
       ${MD5SUM} -c >/dev/null 2>&1 || ${echo} 'xt1/very/long/path/agwb/__init__.py': 'MD5 check failed'
       ) << \SHAR_EOF
ce4aeea94e7d02e4175bee763e16f351  xt1/very/long/path/agwb/__init__.py
SHAR_EOF

else
test `LC_ALL=C wc -c < 'xt1/very/long/path/agwb/__init__.py'` -ne 79 && \
  ${echo} "restoration warning:  size of 'xt1/very/long/path/agwb/__init__.py' is not 79"
  fi
fi
# ============= xt1/very/long/path/agwb/top_v0.py ==============
if test -n "${keep_file}" && test -f 'xt1/very/long/path/agwb/top_v0.py'
then
${echo} "x - SKIPPING xt1/very/long/path/agwb/top_v0.py (file already exists)"

else
${echo} "x - extracting xt1/very/long/path/agwb/top_v0.py (text)"
  sed 's/^X//' << 'SHAR_EOF' > 'xt1/very/long/path/agwb/top_v0.py' &&
from . import agwb
from .top_const import *
X
class top():
X    def __init__(self):
X       self.rr = agwb.desc
X    def show(self):
X       print("object from t1, desc=",self.rr)
X       print("type ID=",C_TYPE_ID)
SHAR_EOF
  (set 20 21 06 28 00 54 18 'xt1/very/long/path/agwb/top_v0.py'
   eval "${shar_touch}") && \
  chmod 0644 'xt1/very/long/path/agwb/top_v0.py'
if test $? -ne 0
then ${echo} "restore of xt1/very/long/path/agwb/top_v0.py failed"
fi
  if ${md5check}
  then (
       ${MD5SUM} -c >/dev/null 2>&1 || ${echo} 'xt1/very/long/path/agwb/top_v0.py': 'MD5 check failed'
       ) << \SHAR_EOF
87d0a95a860020fdfddee13d383b8149  xt1/very/long/path/agwb/top_v0.py
SHAR_EOF

else
test `LC_ALL=C wc -c < 'xt1/very/long/path/agwb/top_v0.py'` -ne 210 && \
  ${echo} "restoration warning:  size of 'xt1/very/long/path/agwb/top_v0.py' is not 210"
  fi
fi
# ============= load_demo.py ==============
if test -n "${keep_file}" && test -f 'load_demo.py'
then
${echo} "x - SKIPPING load_demo.py (file already exists)"

else
${echo} "x - extracting load_demo.py (text)"
  sed 's/^X//' << 'SHAR_EOF' > 'load_demo.py' &&
import sys
import os
import importlib
import tempfile
X
# Directory with description of the first board
dir1 = './xt1/very/long/path'
# Directory with description of the second board
dir2 = './xt2/completely/different/path'
X
# Name of the top entity in the design
top = 'top_v0'
X
# Create a temporary directory
tmpdir = tempfile.TemporaryDirectory()
X
# Add it to the Python path
sys.path.insert(0,tmpdir.name)
X
# Create symlinks to the directories with descriptions of the boards
os.symlink(os.path.abspath(dir1),tmpdir.name+"/t1")
os.symlink(os.path.abspath(dir2),tmpdir.name+"/t2")
X
# Import description of the first board as agwb
import t1.agwb as agwb
X
# use the imported agwb
at1 = getattr(agwb,top)()
# if the name of the top entity is constant, you can do it easier
bt1 = agwb.top_v0()
X
# Import description of the second board as agwb
import t2.agwb as agwb
X
# use the imported agwb
at2 = getattr(agwb,top)()
# if the name of the top entity is constant, you can do it easier
bt2 = agwb.top_v0()
X
# Now we can remove the temporary directory from the python path
sys.path.remove(tmpdir.name)
# We can even delete it (otherwise it will be deleted when Python session ends)
tmpdir.cleanup()
X
# Check if both versions are loaded and available
print("Call at1.show")
at1.show()
print("Call at2.show")
at2.show()
X
print("Call bt1.show")
bt1.show()
print("Call bt2.show")
bt2.show()
X
SHAR_EOF
  (set 20 21 06 28 21 29 22 'load_demo.py'
   eval "${shar_touch}") && \
  chmod 0644 'load_demo.py'
if test $? -ne 0
then ${echo} "restore of load_demo.py failed"
fi
  if ${md5check}
  then (
       ${MD5SUM} -c >/dev/null 2>&1 || ${echo} 'load_demo.py': 'MD5 check failed'
       ) << \SHAR_EOF
41e758c40c9c3b6ab902b130523e21f7  load_demo.py
SHAR_EOF

else
test `LC_ALL=C wc -c < 'load_demo.py'` -ne 1383 && \
  ${echo} "restoration warning:  size of 'load_demo.py' is not 1383"
  fi
fi
# ============= xt2/completely/different/path/agwb/agwb.py ==============
if test ! -d 'xt2'; then
  mkdir 'xt2'
if test $? -eq 0
then ${echo} "x - created directory xt2."
else ${echo} "x - failed to create directory xt2."
     exit 1
fi
fi
if test ! -d 'xt2/completely'; then
  mkdir 'xt2/completely'
if test $? -eq 0
then ${echo} "x - created directory xt2/completely."
else ${echo} "x - failed to create directory xt2/completely."
     exit 1
fi
fi
if test ! -d 'xt2/completely/different'; then
  mkdir 'xt2/completely/different'
if test $? -eq 0
then ${echo} "x - created directory xt2/completely/different."
else ${echo} "x - failed to create directory xt2/completely/different."
     exit 1
fi
fi
if test ! -d 'xt2/completely/different/path'; then
  mkdir 'xt2/completely/different/path'
if test $? -eq 0
then ${echo} "x - created directory xt2/completely/different/path."
else ${echo} "x - failed to create directory xt2/completely/different/path."
     exit 1
fi
fi
if test ! -d 'xt2/completely/different/path/agwb'; then
  mkdir 'xt2/completely/different/path/agwb'
if test $? -eq 0
then ${echo} "x - created directory xt2/completely/different/path/agwb."
else ${echo} "x - failed to create directory xt2/completely/different/path/agwb."
     exit 1
fi
fi
if test -n "${keep_file}" && test -f 'xt2/completely/different/path/agwb/agwb.py'
then
${echo} "x - SKIPPING xt2/completely/different/path/agwb/agwb.py (file already exists)"

else
${echo} "x - extracting xt2/completely/different/path/agwb/agwb.py (text)"
  sed 's/^X//' << 'SHAR_EOF' > 'xt2/completely/different/path/agwb/agwb.py' &&
desc="That's version from directory t2"
SHAR_EOF
  (set 20 21 06 28 00 42 33 'xt2/completely/different/path/agwb/agwb.py'
   eval "${shar_touch}") && \
  chmod 0644 'xt2/completely/different/path/agwb/agwb.py'
if test $? -ne 0
then ${echo} "restore of xt2/completely/different/path/agwb/agwb.py failed"
fi
  if ${md5check}
  then (
       ${MD5SUM} -c >/dev/null 2>&1 || ${echo} 'xt2/completely/different/path/agwb/agwb.py': 'MD5 check failed'
       ) << \SHAR_EOF
4a1737fdf0a063cb6a40e763fd85245a  xt2/completely/different/path/agwb/agwb.py
SHAR_EOF

else
test `LC_ALL=C wc -c < 'xt2/completely/different/path/agwb/agwb.py'` -ne 40 && \
  ${echo} "restoration warning:  size of 'xt2/completely/different/path/agwb/agwb.py' is not 40"
  fi
fi
# ============= xt2/completely/different/path/agwb/top_const.py ==============
if test ! -d 'xt2/completely/different/path/agwb'; then
  mkdir 'xt2/completely/different/path/agwb'
if test $? -eq 0
then ${echo} "x - created directory xt2/completely/different/path/agwb."
else ${echo} "x - failed to create directory xt2/completely/different/path/agwb."
     exit 1
fi
fi
if test -n "${keep_file}" && test -f 'xt2/completely/different/path/agwb/top_const.py'
then
${echo} "x - SKIPPING xt2/completely/different/path/agwb/top_const.py (file already exists)"

else
${echo} "x - extracting xt2/completely/different/path/agwb/top_const.py (text)"
  sed 's/^X//' << 'SHAR_EOF' > 'xt2/completely/different/path/agwb/top_const.py' &&
C_TYPE_ID=2222
SHAR_EOF
  (set 20 21 06 28 00 42 40 'xt2/completely/different/path/agwb/top_const.py'
   eval "${shar_touch}") && \
  chmod 0644 'xt2/completely/different/path/agwb/top_const.py'
if test $? -ne 0
then ${echo} "restore of xt2/completely/different/path/agwb/top_const.py failed"
fi
  if ${md5check}
  then (
       ${MD5SUM} -c >/dev/null 2>&1 || ${echo} 'xt2/completely/different/path/agwb/top_const.py': 'MD5 check failed'
       ) << \SHAR_EOF
e32dd05b8c4a7f38d1a0f48d0473073c  xt2/completely/different/path/agwb/top_const.py
SHAR_EOF

else
test `LC_ALL=C wc -c < 'xt2/completely/different/path/agwb/top_const.py'` -ne 15 && \
  ${echo} "restoration warning:  size of 'xt2/completely/different/path/agwb/top_const.py' is not 15"
  fi
fi
# ============= xt2/completely/different/path/agwb/__init__.py ==============
if test -n "${keep_file}" && test -f 'xt2/completely/different/path/agwb/__init__.py'
then
${echo} "x - SKIPPING xt2/completely/different/path/agwb/__init__.py (file already exists)"

else
${echo} "x - extracting xt2/completely/different/path/agwb/__init__.py (text)"
  sed 's/^X//' << 'SHAR_EOF' > 'xt2/completely/different/path/agwb/__init__.py' &&
from .agwb import *
from .top_const import *
from .top_v0 import top as top_v0
SHAR_EOF
  (set 20 21 06 28 00 46 48 'xt2/completely/different/path/agwb/__init__.py'
   eval "${shar_touch}") && \
  chmod 0644 'xt2/completely/different/path/agwb/__init__.py'
if test $? -ne 0
then ${echo} "restore of xt2/completely/different/path/agwb/__init__.py failed"
fi
  if ${md5check}
  then (
       ${MD5SUM} -c >/dev/null 2>&1 || ${echo} 'xt2/completely/different/path/agwb/__init__.py': 'MD5 check failed'
       ) << \SHAR_EOF
ce4aeea94e7d02e4175bee763e16f351  xt2/completely/different/path/agwb/__init__.py
SHAR_EOF

else
test `LC_ALL=C wc -c < 'xt2/completely/different/path/agwb/__init__.py'` -ne 79 && \
  ${echo} "restoration warning:  size of 'xt2/completely/different/path/agwb/__init__.py' is not 79"
  fi
fi
# ============= xt2/completely/different/path/agwb/top_v0.py ==============
if test -n "${keep_file}" && test -f 'xt2/completely/different/path/agwb/top_v0.py'
then
${echo} "x - SKIPPING xt2/completely/different/path/agwb/top_v0.py (file already exists)"

else
${echo} "x - extracting xt2/completely/different/path/agwb/top_v0.py (text)"
  sed 's/^X//' << 'SHAR_EOF' > 'xt2/completely/different/path/agwb/top_v0.py' &&
from . import agwb
from .top_const import *
class top():
X    def __init__(self):
X       self.rr = agwb.desc
X    def show(self):
X       print("object from t2, desc=",self.rr)
X       print("type ID=",C_TYPE_ID)
SHAR_EOF
  (set 20 21 06 28 00 53 12 'xt2/completely/different/path/agwb/top_v0.py'
   eval "${shar_touch}") && \
  chmod 0644 'xt2/completely/different/path/agwb/top_v0.py'
if test $? -ne 0
then ${echo} "restore of xt2/completely/different/path/agwb/top_v0.py failed"
fi
  if ${md5check}
  then (
       ${MD5SUM} -c >/dev/null 2>&1 || ${echo} 'xt2/completely/different/path/agwb/top_v0.py': 'MD5 check failed'
       ) << \SHAR_EOF
a9df0ac7641bcbd58ff0bbf61f560e16  xt2/completely/different/path/agwb/top_v0.py
SHAR_EOF

else
test `LC_ALL=C wc -c < 'xt2/completely/different/path/agwb/top_v0.py'` -ne 209 && \
  ${echo} "restoration warning:  size of 'xt2/completely/different/path/agwb/top_v0.py' is not 209"
  fi
fi
if rm -fr ${lock_dir}
then ${echo} "x - removed lock directory ${lock_dir}."
else ${echo} "x - failed to remove lock directory ${lock_dir}."
     exit 1
fi
exit 0