up.sh

#!/usr/bin/env sh
# Copyright 2019-2022 (c) all rights reserved by S D Rausty;  Please see LICENSE
# https://shlibs.github.io/shlibs.sh published courtesy https://pages.github.com
# Updates the buildAPKs git repository and git submodules to the newest version.
################################################################################
set -eu
_CSLIST_ () {	# create checksum file RDR/.conf/sha512.sum and compare with RDR/sha512.sum
	! grep "setup.buildAPKs.bash" "$RDR"/sha512.sum 1>/dev/null || sed -i "/setup.buildAPKs.bash/d" "$RDR"/sha512.sum
	FAUTH="DOSO DOSON DRLIM EXTSTDO GAUTH LIBAUTH QUIET RDR" # file list
	cd "$RDR"/.conf/
	sha512sum $FAUTH > sha512.sum	# create checksum file RDR/.conf/sha512.sum
	for QAUTH in $FAUTH	# each element in FAUTH
	do	# find and compare hashes
		CAUTH=$("$COMDGREP" "$QAUTH" "$RDR/.conf/sha512.sum" | awk '{print $1}')
		RAUTH=$("$COMDGREP" "$QAUTH" "$RDR/sha512.sum" | awk '{print $1}')
		if [ "$RAUTH" != "$CAUTH" ]	# hashes differ
		then	# delete line with changed checksum in RDR/sha512.sum
			sed -i "/$QAUTH/d" "$RDR"/sha512.sum
		fi
	done
	rm -f sha512.sum # remove checksum file .conf/sha512.sum and temp file
	cd "$RDR"
	_PRT_  "Checking checksums in directory '~/${RDR##*/}' with sha512sum: " && sha512sum -c --quiet sha512.sum && _PRNT_ "DONE "
}
_DONE_() { _PRNT_ "Script ${0##*/}: DONE " ; }	# print script done message
_PESTRG_ () { _PRNT_ "$WSTRING" ; }	# print WSTRING warning message
_PRCS_ () { _PRT_  "Checking checksums in directory '~/${RDR##*/}/$IMFSTRG' with sha512sum: " && sha512sum -c --quiet sha512.sum 2>/dev/null && _PRNT_ "DONE " ; }	# print checksums message and run sha512sum
_PRNT_ () { printf "%s\\n" "$1" ; }	# print message with one trialing newline
_PRT_ () { printf "%s" "$1" ; }	# print message with no trialing newline
_UP_ () {	# add or update git submodule repository
	_PRT_ "Updating git submodule '~/${RDR##*/}/$IMFSTRG': "
	( ( git submodule update --depth 1 --recursive --remote "$IMFSTRG" || git submodule add --depth 1 "$MRASTRG" "$IMFSTRG" ) && cd "$RDR/$IMFSTRG" && _PRCS_ && cd "$RDR" ) || _PESTRG_	# the command ` git submodule help ` and the book https://git-scm.com/book/en/v2/Git-Tools-Submodules have more information about git submodules.
	sleep 0.$(shuf -i 24-72 -n 1)	# enhance device and network latency support on fast networks;  See ` grep -hC 4 -r sleep ~/buildAPKs/scripts ` for complementary latency applications of ` sleep ` when BuildAPKs is installed.  You can use https://raw.githubusercontent.com/BuildAPKs/buildAPKs/master/setup.buildAPKs.bash to set ~/buildAPKs up on device with ` curl -OL https://raw.githubusercontent.com/BuildAPKs/buildAPKs/master/setup.buildAPKs.bash ; bash setup.buildAPKs.bash `.  It appears that a little sleep can go a long way in reducing network collisions on fast networks.
}

_BGUP_() {	# begin updates
_PRNT_ "Script '${0##*/}':  STARTED..."
WSTRING="WARNING: Could not determine grep command ${0##*/}:  Continuing...  "	# define WSTRING warning message
if command -v /system/bin/grep 1>/dev/null
then
COMDGREP="/system/bin/grep"	# define COMDGREP
elif command -v grep 1>/dev/null
then
COMDGREP="grep"	# define COMDGREP
else
_PESTRG_
COMDGREP="grep"	# define COMDGREP
fi
WSTRING="WARNING ${0##*/}:  Continuing...  "	# define WSTRING warning message
RDR="$HOME/buildAPKs"		# define project root directory
SIAD="https://github.com"	# define site address
SIADS="$SIAD/BuildAPKs"	# define remote login
cd "$RDR"	# change directory to project root directory
_PRNT_ "You can use 'cd ~/${RDR##*/} ; mv sources .. ; ./update.buildAPKs.sh ; mv ../sources .' if you wish to shorten the update commit: Continuing..."
sleep $(shuf -i 3-6 -n 1)
git pull || { _PRNT_ "Please study the output of the first error.  If 'error: Your local changes to the following files would be overwritten by merge:' is found, directory '~/${RDR##*/}/stash' can be used to store files.  Then run '${0##*/}' again to update ~/${RDR##*/} to the most recent version published." ; _DONE_ ; exit 204 ; }	# attempt to update local git repository to the newest version published
_CSLIST_ || _PESTRG_	# run function _PESTRG_ if function _CSLIST_ errs
sleep 0.$(shuf -i 24-72 -n 1)	# add device and network latency support;  Commands like this script can request many read write operations.  The sleep plus shuf commands cause this script to wait for a short pseudo random period of time.  This can ease excessive device latency when running these build scripts.
if "$COMDGREP" gitmodules sha512.sum 1>/dev/null
then
sed -i '/gitmodules/d' sha512.sum && git add sha512.sum && git commit -m "commit $(date)"
fi
rm -f opt/api/github/.git opt/db/.git scripts/bash/shlibs/.git scripts/sh/shlibs/.git || _PESTRG_	# remove automatically generated submodule .git files which were created through the process of cloning and updating git repositories as submodules
IMFSTRG="opt/api/github"	# define install module folder
MRASTRG="$SIADS/buildAPKs.github"	 # define module repository site
_UP_	# add or update git submodule repository
IMFSTRG="opt/db" # redefine install module folder
MRASTRG="$SIADS/db.BUildAPKs"	# redefine module repository site address
_UP_
SIADS="$SIAD/shlibs"	# redefine login
IMFSTRG="scripts/bash/shlibs"
MRASTRG="$SIADS/shlibs.bash"
_UP_
IMFSTRG="scripts/sh/shlibs"
MRASTRG="$SIADS/shlibs.sh"
_UP_
{ _PRT_ "Removing '.git' files;  This permits updating project directories in '~/${RDR##*/}/sources/' to the newest version published automatically when some of the BuildAPKs build scripts are run: " && find "$RDR/sources/" -maxdepth 2 -type f -name .git -delete && _PRNT_ "DONE " ; } || _PESTRG_
_DONE_
}
set +e
PVAR="$(ping -n 1 1.1.1.1 2>&1)"
set -e
if [ -n "${PVAR##*unreachable*}" ]
then
	_BGUP_
else
	_PRT_ "Script '${0##*/}':  STARTED... "
	printf '%s;  Please check your wireless connection and run %s again.  Exiting... ' "$PVAR" "'${0##*/}'"
	_PRNT_ "DONE "
fi
# up.sh EOF