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path: root/debian/_buildscripts/local/update_repositories.sh
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#!/bin/bash

# Check command line arguments and set options
# Run before loading configuration, to allow branch overriding
bool_INCREMENTAL="n"
bool_VERBOSE_LOG="n"
bool_SWITCH_ONLY="n"
OVERRIDE_DEFAULT_REPO_BRANCH=""
for ((idx=1; idx<=$#; idx++)); do
  arg="${!idx}"
	if [ "$arg" = "-i" ]; then 		    		# continue from last updated module (Incremental)
		bool_INCREMENTAL="y"
	elif [ "$arg" = "-v" ]; then 		    	# display and log git command output (Verbose)
		bool_VERBOSE_LOG="y"
	elif [ "$arg" = "-ub" ]; then 	   		# branches to update (Update Branches)
		((idx++))
		OVERRIDE_UPDATE_BRANCHES="${!idx}"
		[[ -z "$OVERRIDE_DEFAULT_REPO_BRANCH" ]] && OVERRIDE_DEFAULT_REPO_BRANCH="${!idx}"
	elif [ "$arg" = "-db" ]; then 	    	# default branch after update (Default Branch)
		((idx++))
		if [[ "$bool_SWITCH_ONLY" != 'y' ]]; then
		  # '-db' is only used if no '-so' argument is specified. If '-so <branch>'
		  # is given, '-db <branch> is ignored
			OVERRIDE_DEFAULT_REPO_BRANCH="${!idx}"
		fi
	elif [ "$arg" = "-so" ]; then 	   		# switch branch only (Switch Only)
		bool_SWITCH_ONLY="y" && ((idx++))
		OVERRIDE_DEFAULT_REPO_BRANCH="${!idx}"
	fi
done

# Load common code
. ./internals/_build_common.sh
init_common

UPDATE_LOCK_FILENAME="/var/lock/TDE_update_repo_lock"  	# Lock file for incremental update

#----------------------------
# Update a given module from the upstream repo
# Parameters:
#  $1 - module folder
#  $2 - operation type
#  $3 - branch to update
#  $4 - new branch flag (only for reporting)
function _do_update()
{
	local MOD_PATH=$1
	local OP_TYPE=$2
	local BRANCH=$3
	local NEW_BRANCH=$4
	local RESULT=""
	
	case "$OP_TYPE" in 
		"update")
			if [[ -z `grep "^$BRANCH - $MOD_PATH$" "$UPDATE_LOCK_FILENAME"` ]]; then
				cd "$MOD_PATH" &>/dev/null
				if [ $? -eq 0 ]; then
					# Clean up any possible uncommitted changes
					if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
						git reset --hard HEAD &>/dev/null
						git clean -dxff &>/dev/null
					fi
					# Make sure the local branch exists
					if [[ -z `git branch | grep -E "\b$BRANCH\b"` ]]; then
					  NEW_BRANCH="y"
						eval git checkout -b \"$BRANCH\" \"origin/$BRANCH\" $OPT_VERBOSE_LOG
					else	
						eval git checkout \"$BRANCH\" $OPT_VERBOSE_LOG
					fi
					# Make sure the local branch is a tracking branch
					if [[ -z `git config branch."$BRANCH".remote` ]]; then
						NEW_BRANCH="y"
						git branch -u "origin/$BRANCH" &>/dev/null #$
						git reset --hard "origin/$BRANCH" &>/dev/null
					fi
					# Update
					eval git reset --hard HEAD $OPT_VERBOSE_LOG
					eval git clean -dxff $OPT_VERBOSE_LOG
					eval git fetch $OPT_VERBOSE_LOG
					for _remote in `git remote`; do
						eval git remote prune $_remote $OPT_VERBOSE_LOG
					done
					if [[ $(git rev-parse HEAD) != $(git rev-parse "origin/$BRANCH") ]]; then
						eval git pull --rebase $GIT_NO_RECURSE_SUBMODULES $OPT_VERBOSE_LOG
						if [[ `git rev-parse HEAD` == `git rev-parse "origin/$BRANCH"` ]]; then
							RESULT="${CLightGreen}[ UPDATE ]"
						else
							RESULT="${CLightRed}[  FAIL  ]"
						fi
					else
						if [[ "$NEW_BRANCH" = "y" ]]; then
							RESULT="${CLightGreen}[ UPDATE ]"
						else
							RESULT="[   OK   ]"
						fi
					fi
				else
					RESULT="${CLightRed}[  FAIL  ]"
				fi
				echo "$BRANCH - $MOD_PATH" >> "$UPDATE_LOCK_FILENAME"
			else
				RESULT="${CBrown}[  SKIP  ]"
			fi
			;;
		
		"switch-to")
			cd "$MOD_PATH" &>/dev/null
			eval git checkout \"$BRANCH\" $OPT_VERBOSE_LOG
			eval git reset --hard HEAD $OPT_VERBOSE_LOG
			eval git clean -dxff $OPT_VERBOSE_LOG
			if [[ ! -z `git branch -v | grep -E "^\*\s+$BRANCH"` ]]; then
				RESULT="[   OK   ]"
			else
				RESULT="${CLightRed}[  FAIL  ]"
			fi
			;;
	
		*)
			RESULT="[ INV-OP ]"
			;;
	esac
	
	echo_and_tee "$RESULT  $MOD_PATH${CNone}" "$LOG_UPDATE_REPO_FILENAME"
}

#----------------------------
# Update a given module and all submodules from the upstream repo
# Parameters:
#  $1 - module folder
#  $2 - operation type 
#  $3 - branch to update
#  $4 - new branch flag (only for reporting)
function _update_module()
{
	local MOD_PATH=$1
	local OP_TYPE=$2
	local BRANCH=$3
	
	# Current module
	_do_update "$@"
  # Submodules
	local NEW_BRANCH="n"
  local SUBMOD_LIST="$MOD_PATH/.gitmodules"
	if [[ -e "$SUBMOD_LIST" ]]; then
		sed -n "s|^\[submodule \"\([^\"]*\)\"\]$|\1|p" <$SUBMOD_LIST |\
		while read -r SUBMOD_PATH; do
			NEW_BRANCH="n"
			cd "$MOD_PATH" &>/dev/null
			if [[ -z "`git config --get submodule.$SUBMOD_PATH.url`" ]]; then
			  NEW_BRANCH="y"  # if a submodule is missing, need to report "update" status
				eval git submodule init -- \"$SUBMOD_PATH\" $OPT_VERBOSE_LOG
			fi
			if [[ ! -e "$MOD_PATH/$SUBMOD_PATH/.git" ]]; then
			  NEW_BRANCH="y"  # if a submodule is incomplete, need to report "update" status
				eval git submodule update -- \"$SUBMOD_PATH\" $OPT_VERBOSE_LOG
			fi
			_update_module "$MOD_PATH/$SUBMOD_PATH" "$OP_TYPE" "$BRANCH" "$NEW_BRANCH"
		done
	fi
}

#----------------------------
if [ "$bool_INCREMENTAL" = "y" ]; then
  [ ! -f "$UPDATE_LOCK_FILENAME" ] && bool_INCREMENTAL="n"
else
	[ -f "$UPDATE_LOCK_FILENAME" ] && rm "$UPDATE_LOCK_FILENAME"
fi

OPT_VERBOSE_LOG="&>/dev/null"
if [[ "$bool_VERBOSE_LOG" = "y" ]]; then
	OPT_VERBOSE_LOG=" |& tee -a \"$LOG_UPDATE_REPO_FILENAME\""
fi

#----------------------------
# Check git abilities
GIT_IGNORE_SUBMODULES=""
if [[ -n "`git status --help 2>/dev/null|grep -- '--ignore-submodules'`" ]]; then
  GIT_IGNORE_SUBMODULES="--ignore-submodules"
fi
GIT_NO_RECURSE_SUBMODULES=""
if [[ -n "`git pull --help |grep -- '--\[no-\]recurse-submodules'`" ]]; then
  GIT_NO_RECURSE_SUBMODULES="--no-recurse-submodules"
fi

# Start update
if [ "$bool_INCREMENTAL" != "y" ]; then
	echo "TDE repositories update started" > "$UPDATE_LOCK_FILENAME"
fi

_LAST_BRANCH=""
if [[ "$bool_SWITCH_ONLY" != 'y' ]]; then
	# Branch update
	for branch in "${BRANCHES[@]}"; do
		_LAST_BRANCH="$branch"
		echo_and_tee "${CLightCyan}---------------------------------------${CNone}" "$LOG_UPDATE_REPO_FILENAME" "y"
		echo_and_tee "${CLightCyan}        Updating branch ${CYellow}$branch        ${CNone}" "$LOG_UPDATE_REPO_FILENAME"
		echo_and_tee "${CLightCyan}---------------------------------------${CNone}" "$LOG_UPDATE_REPO_FILENAME"
			
		# Update TDE main repository
		_update_module "$REPO_TDE" "update" "$branch" "n"
		
		# Update TDE packaging repository
		_update_module "$TDE_DIR/$CFG_GIT_DIR/tde-packaging" "update" "$branch" "n"

		echo_and_tee "" "$LOG_UPDATE_REPO_FILENAME"
	done
fi

# Switch to specified branch if necessary
if [[ "$DEFAULT_REPO_BRANCH" != "$_LAST_BRANCH" ]]; then
	echo_and_tee "${CLightCyan}---------------------------------------${CNone}" "$LOG_UPDATE_REPO_FILENAME" "y"
	echo_and_tee "${CLightCyan}      Switching to branch ${CYellow}$DEFAULT_REPO_BRANCH      ${CNone}" "$LOG_UPDATE_REPO_FILENAME"
	echo_and_tee "${CLightCyan}---------------------------------------${CNone}" "$LOG_UPDATE_REPO_FILENAME"
		
	# Switch TDE main repository
	_update_module "$REPO_TDE" "switch-to" "$DEFAULT_REPO_BRANCH" "n"
	
	# Switch TDE packaging repository
	_update_module "$TDE_DIR/$CFG_GIT_DIR/tde-packaging" "switch-to" "$DEFAULT_REPO_BRANCH" "n"

	echo_and_tee "" "$LOG_UPDATE_REPO_FILENAME"
fi

# Update completed
[ -f "$UPDATE_LOCK_FILENAME" ] && rm "$UPDATE_LOCK_FILENAME"
cd $SCRIPT_DIR