posix compliant shell scripts

setup.sh

@@ -1,52 +1,38 @@
-#!/bin/bash -e
+#!/bin/sh -e
 
-SYS_PYTHON=$(which pypy3 || which pypy || which pypy2)
+DEST="${1}"
+DEST="${DEST:=vanguardenv}"
+mkdir -p "${DEST}"
 
-if [ -z $1 ]
-then
-  DEST=vanguardenv
-else
-  DEST=$1
-fi
-
-mkdir -p $DEST
+SYS_PYTHON=$(command -v pypy3 || command -v pypy || command -v pypy2)
 
 # 1. Install python if needed
-if [ -z "$(which $SYS_PYTHON)" ]
-then
-  echo "We need pypy or pypy3 to be in the path."
-  echo
-  echo "If you are on a Debian or Ubuntu system, you can try: "
-  echo " sudo apt-get install pypy virtualenv"
-  echo
-  echo "If there is no pypy for your arch, edit this script to set"
-  echo "SYS_PYTHON=\"python\""
+if [ -z "${SYS_PYTHON}" ]; then
+  printf "We need pypy or pypy3 to be in the path.\n
+  \b\bIf you are on a Debian or Ubuntu system, you can try:
+  \tsudo apt-get install pypy virtualenv\n
+  \b\bIf there is no pypy for your arch, edit this script to set
+  \tSYS_PYTHON=\"python\"\n"
   exit 1
 fi
 
-if [ -z "$(which virtualenv)" ]
-then
-  echo "We need virtualenv to be in the path. If you are on a debian system, try:"
-  echo " sudo apt-get install virtualenv"
+if [ -z "$(command -v virtualenv)" ]; then
+  printf "We need virtualenv to be in the path. If you are on a debian system, try:
+  \tsudo apt-get install virtualenv\n"
   exit 1
 fi
 
 # 2. Initialize virtualenv
-if [ ! -f ${DEST}/bin/activate ]
-then
-  virtualenv --never-download -p $SYS_PYTHON $DEST
-fi
-source ${DEST}/bin/activate
+[ ! -f "${DEST}"/bin/activate ] && virtualenv --never-download -p "${SYS_PYTHON}" "${DEST}"
+. "${DEST}"/bin/activate
 
 # 3. Install stem+setuptools
 pip install --require-hashes -r requirements.txt
 
-$(basename $SYS_PYTHON) setup.py install
+BASE_SYS_PYTHON=${SYS_PYTHON##*/}
+"${BASE_SYS_PYTHON}" setup.py install
 
 # 4. Inform user what to do
-echo
-echo "If we got this far, everything should be ready!"
-echo
-echo "Run 'source ${DEST}/bin/activate' to start the environment."
-echo
-echo "Then run 'vanguards' or './vanguards_parallel.sh'"
+printf %s"\nIf we got this far, everything should be ready!\n
+Run '. ${DEST}/bin/activate' to start the environment.\n
+Then run 'vanguards' or './vanguards_parallel.sh'\n"

vanguards_parallel.sh

@@ -11,27 +11,25 @@
 
 
 # Use pypy or pypy3, if available
-SYS_PY=$(which pypy3 || which pypy || which pypy2 || which python3 || which python2)
+SYS_PY=$(command -v pypy3 || command -v pypy || command -v pypy2 || command -v python3 || command -v python2)
 
-VANGUARDS_LOCATION=$(which vanguards || echo "$SYS_PY ./src/vanguards.py")
+VANGUARDS_LOCATION=$(command -v vanguards || printf %s"${SYS_PY} ./src/vanguards.py\n")
 
-OTHER_OPTIONS="$@"
+OTHER_OPTIONS="$*"
 
 # Vanguards instance
-$VANGUARDS_LOCATION --disable_bandguards --disable_rendguard --logfile :syslog: $OTHER_OPTIONS &
+"${VANGUARDS_LOCATION}" --disable_bandguards --disable_rendguard --logfile :syslog: "${OTHER_OPTIONS}" &
 
 # Bandguards instance
-$VANGUARDS_LOCATION --disable_vanguards --disable_rendguard --logfile :syslog: $OTHER_OPTIONS &
+"${VANGUARDS_LOCATION}" --disable_vanguards --disable_rendguard --logfile :syslog: "${OTHER_OPTIONS}" &
 
 # Rendguards instance
-$VANGUARDS_LOCATION --disable_vanguards --disable_bandguards --logfile :syslog: $OTHER_OPTIONS &
+"${VANGUARDS_LOCATION}" --disable_vanguards --disable_bandguards --logfile :syslog: "${OTHER_OPTIONS}" &
 
 jobs -l
 
-echo
-echo "Vanguards is now running in the background as the above jobs."
-echo "Note that they log to syslog to avoid overwriting eachother's logs"
-echo
-echo "If you still are experiencing high CPU from the vanguards process,"
-echo "remember that it can be run with --one_shot_vanguards, once per hour"
-echo "from cron."
+printf "\nVanguards is now running in the background as the above jobs.
+Note that they log to syslog to avoid overwriting eachother's logs\n
+If you still are experiencing high CPU from the vanguards process,
+remember that it can be run with --one_shot_vanguards, once per hour
+from cron.\n"