markusfisch/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Generate an annual commit report

Prints something like this:
In 2018 you made 2488 commits in 134 projects.
The average length of a commit message was 62 characters.

Commits per weekday
    Monday     334 ******************************************
   Tuesday     440 *******************************************************
 Wednesday     464 ***********************************************************
  Thursday     405 ***************************************************
    Friday     364 **********************************************
  Saturday     201 *************************
    Sunday     280 ***********************************

Commits per month
       Jan     160 **********************************
       Feb     199 ******************************************
       Mar     272 **********************************************************
       Apr     260 *******************************************************
       May     274 ***********************************************************
       Jun     216 **********************************************
       Jul     168 ************************************
       Aug     192 *****************************************
       Sep     132 ****************************
       Oct     194 *****************************************
       Nov     243 ****************************************************
       Dec     178 **************************************

Lines added (+) and removed (-) per weekday
    Monday   29655 ++++++++++++++++++++++++
   Tuesday   71311 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 Wednesday   65859 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
  Thursday   46093 ++++++++++++++++++++++++++++++++++++++
    Friday   14724 ++++++++++++
  Saturday    7019 +++++
    Sunday   17739 ++++++++++++++

Lines added (+) and removed (-) per month
       Jan   11195 +++++++
       Feb    6722 ++++
       Mar    6240 +++
       Apr   11334 +++++++
       May   10263 ++++++
       Jun   22041 +++++++++++++
       Jul   24548 +++++++++++++++
       Aug   10521 ++++++
       Sep   39420 ++++++++++++++++++++++++
       Oct    7028 ++++
       Nov    9254 +++++
       Dec   93834 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Top 3 words in commit messages (ignoring words up to three letters)
      into     282 ***********************************************************
    Update     227 ***********************************************
    branch     198 *****************************************


Configuration

If you keep your sources in ~/src you're all set up.
If you like it different, simply invoke the script with the directories your
sources live in:
$ ./annual.sh path/to/my/projects another/path

If you commit with more than just one eMail address, set an AUTHORS
environment variable before invoking the script:
$ AUTHORS='alice@example.com ali@gmail.com' ./annual.sh

If you like to generate the report for a past year, set up YEAR:
$ YEAR=2010 ./annual.sh

If you want to replace "you" in the first line, set WHO:
$ WHO=Markus ./annual.sh

To exclude certain files or folders from line counting, use LOC_EXTRA_ARGS:
$ LOC_EXTRA_ARGS='-- . :(exclude)*folder_to_exclude*' ./annual.sh

To make your setup permanent, simply use your own wrapper script:
#!/usr/bin/env bash
export AUTHORS='...'
export WHO='...'
export LOC_EXTRA_ARGS='...'
./annual.sh "$@"

Make a Google Chart

Pipe the output of annual.sh into a file, say 2018:
$ ./annual.sh > 2018

And you may visualize one or more of those reports with Google Charts using
the enclosed chart.sh script. For example, if you also generated a report
for 2017 you can do:
$ ./chart.sh 2017 2018 > charts.html


## annual.sh
#!/usr/bin/env bash

# Print a bar chart from NAME VALUE pairs given on STDIN
chart() {
	local TMP MIN=0 MAX=0 NAME VALUE
	TMP=$(mktemp)
	while read -r NAME VALUE
	do
		((VALUE > MAX)) && MAX=$VALUE
		((VALUE < MIN)) && MIN=$VALUE
		echo "$NAME" "$VALUE"
	done > "$TMP"
	local COLS=${COLS:-$(tput cols)}
	((COLS -= 21))
	local BLANK PBAR NBAR
	BLANK=$(printf "%${COLS}s")
	PBAR=${BLANK// /${POSITIVES:-'*'}}
	NBAR=${BLANK// /${NEGATIVES:-'-'}}
	((MIN < 0)) && {
		((MAX -= MIN))
		((MIN = -MIN))
	}
	local F=$(((MAX << 16) / COLS)) BAR FILL
	local BASE=$(((MIN << 16) / F))
	((F < 1)) && F=1
	while read -r NAME VALUE
	do
		if ((VALUE > 0))
		then
			BAR=${BLANK:0:$BASE}
			BAR=$BAR${PBAR:0:$(((VALUE << 16) / F))}
		else
			FILL=$(((-VALUE << 16) / F))
			BAR=${BLANK:0:$((BASE - FILL))}
			BAR=$BAR${NBAR:0:$FILL}
		fi
		printf '%10s %7s %s\n' "$NAME" "$VALUE" "$BAR"
	done < "$TMP"
	rm -rf "$TMP"
}

# Calculate average length of commit messages
commit_message_length() {
	local MESSAGE='' MESSAGES=0 LENGTH=0
	while read -r
	do
		[ -z "$MESSAGE" ] && {
			if [[ "$REPLY" == "{{{"* ]]
			then
				REPLY=${REPLY#* }
			else
				continue
			fi
		}
		MESSAGE=$MESSAGE${REPLY%'}}}'}
		[[ "$REPLY" == *'}}}' ]] && {
			((++MESSAGES))
			((LENGTH += ${#MESSAGE}))
			MESSAGE=
		}
	done
	if ((MESSAGES > 0))
	then
		echo "The average length of a commit message was $((LENGTH / MESSAGES)) characters."
	fi
}

# Filter commits into days of the week
commits_per_weeday() {
	local MON=0 TUE=0 WED=0 THU=0 FRI=0 SAT=0 SUN=0
	while read -r DAY REST
	do
		case "$DAY" in
			Mon*) ((++MON));;
			Tue*) ((++TUE));;
			Wed*) ((++WED));;
			Thu*) ((++THU));;
			Fri*) ((++FRI));;
			Sat*) ((++SAT));;
			Sun*) ((++SUN));;
		esac
	done
	cat << EOF
Monday $MON
Tuesday $TUE
Wednesday $WED
Thursday $THU
Friday $FRI
Saturday $SAT
Sunday $SUN
EOF
}

# Filter commits into months
commits_per_month() {
	local JAN=0 FEB=0 MAR=0 APR=0 MAY=0 JUN=0
	local JUL=0 AUG=0 SEP=0 OCT=0 NOV=0 DEC=0
	while read -r _ _ MONTH _
	do
		case "$MONTH" in
			Jan*) ((++JAN));;
			Feb*) ((++FEB));;
			Mar*) ((++MAR));;
			Apr*) ((++APR));;
			May*) ((++MAY));;
			Jun*) ((++JUN));;
			Jul*) ((++JUL));;
			Aug*) ((++AUG));;
			Sep*) ((++SEP));;
			Oct*) ((++OCT));;
			Nov*) ((++NOV));;
			Dec*) ((++DEC));;
		esac
	done
	cat << EOF
Jan $JAN
Feb $FEB
Mar $MAR
Apr $APR
May $MAY
Jun $JUN
Jul $JUL
Aug $AUG
Sep $SEP
Oct $OCT
Nov $NOV
Dec $DEC
EOF
}

# Filter lines of code into days of the week
loc_per_weeday() {
	local INSERTS=() DELETIONS=() DAY=7
	while read -r FIRST SECOND _
	do
		case "$FIRST" in
			'-') ;;
			[0-9]*)
				((DAY > 6)) && continue
				((FIRST > 0)) && ((INSERTS[DAY] += FIRST))
				((SECOND > 0)) && ((DELETIONS[DAY] += SECOND))
				;;
			Mon*) DAY=0;;
			Tue*) DAY=1;;
			Wed*) DAY=2;;
			Thu*) DAY=3;;
			Fri*) DAY=4;;
			Sat*) DAY=5;;
			Sun*) DAY=6;;
		esac
	done
	cat << EOF
Monday $((INSERTS[0] - DELETIONS[0]))
Tuesday $((INSERTS[1] - DELETIONS[1]))
Wednesday $((INSERTS[2] - DELETIONS[2]))
Thursday $((INSERTS[3] - DELETIONS[3]))
Friday $((INSERTS[4] - DELETIONS[4]))
Saturday $((INSERTS[5] - DELETIONS[5]))
Sunday $((INSERTS[6] - DELETIONS[6]))
EOF
}

# Filter lines of code into months
loc_per_month() {
	local INSERTS=() DELETIONS=() MONTH=12
	while read -r FIRST SECOND REST
	do
		case "$FIRST" in
			'-') ;;
			[0-9]*)
				((MONTH > 11)) && continue
				((FIRST > 0)) && ((INSERTS[MONTH] += FIRST))
				((SECOND > 0)) && ((DELETIONS[MONTH] += SECOND))
				;;
			*)
				case "$REST" in
					Jan*) MONTH=0;;
					Feb*) MONTH=1;;
					Mar*) MONTH=2;;
					Apr*) MONTH=3;;
					May*) MONTH=4;;
					Jun*) MONTH=5;;
					Jul*) MONTH=6;;
					Aug*) MONTH=7;;
					Sep*) MONTH=8;;
					Oct*) MONTH=9;;
					Nov*) MONTH=10;;
					Dec*) MONTH=11;;
				esac
				;;
		esac
	done
	cat << EOF
Jan $((INSERTS[0] - DELETIONS[0]))
Feb $((INSERTS[1] - DELETIONS[1]))
Mar $((INSERTS[2] - DELETIONS[2]))
Apr $((INSERTS[3] - DELETIONS[3]))
May $((INSERTS[4] - DELETIONS[4]))
Jun $((INSERTS[5] - DELETIONS[5]))
Jul $((INSERTS[6] - DELETIONS[6]))
Aug $((INSERTS[7] - DELETIONS[7]))
Sep $((INSERTS[8] - DELETIONS[8]))
Oct $((INSERTS[9] - DELETIONS[9]))
Nov $((INSERTS[10] - DELETIONS[10]))
Dec $((INSERTS[11] - DELETIONS[11]))
EOF
}

# Most used words in commit messages; ignoring words up to three letters
#
# @param 1 - number of words (optional)
top_words() {
	grep -Eoa '[a-zA-Z0-9]+' |
		grep -FvE '(^[a-zA-Z]{1,3}$|^[0-9]+$)' |
		sort |
		uniq -c |
		sort -rn |
		head -n "${1:-3}" | while read -r COUNT WORD
	do
		echo "$WORD $COUNT"
	done
}

# Browse all git repositories and create an annual activity report
#
# ... - source directories (optional)
annual_report() {
	local SINCE UNTIL
	YEAR=${YEAR:-$(date +%Y)}
	SINCE="${YEAR}-01-01"
	UNTIL="$((YEAR + 1))-01-01"

	local AUTHOR AUTHOR_TAGS=''
	for AUTHOR in ${AUTHORS:-$(git config user.email)}
	do
		AUTHOR_TAGS=$AUTHOR_TAGS${AUTHOR_TAGS:+' '}"--author=$AUTHOR"
	done

	local PROJECTS=0
	local COMMITS=0

	local CACHE_PREFIX="$PWD/${0##*/}-$$"
	local CACHE_ALL="${CACHE_PREFIX}-all"
	local CACHE_PROJECT="${CACHE_PREFIX}-project"
	local CACHE_LOC="${CACHE_PREFIX}-loc"
	local CACHE_MESSAGES="${CACHE_PREFIX}-messages"
	rm_cache() {
		rm -f "${CACHE_PREFIX}"*
	}
	rm_cache

	local DIRECTORY
	while read -r DIRECTORY
	do
		DIRECTORY=${DIRECTORY%/.git}

		# $AUTHOR_TAGS and *_EXTRA_ARGS are expanded and cannot be quoted
		# shellcheck disable=SC2086
		(cd "$DIRECTORY" && [ -d '.git' ] &&
			git log \
				--branches \
				--since="$SINCE" \
				--until="$UNTIL" \
				--format='tformat:%aD' \
				$AUTHOR_TAGS \
				$PROJECTS_EXTRA_ARGS > "$CACHE_PROJECT" &&
			git log \
				--numstat \
				--branches \
				--since="$SINCE" \
				--until="$UNTIL" \
				--format='tformat:%aD' \
				$AUTHOR_TAGS \
				$LOC_EXTRA_ARGS >> "$CACHE_LOC" &&
			git log \
				--branches \
				--since="$SINCE" \
				--until="$UNTIL" \
				--format='tformat:{{{%B}}}' \
				$AUTHOR_TAGS \
				$MESSAGES_EXTRA_ARGS >> "$CACHE_MESSAGES"
		) || {
			echo "error: failed to process $DIRECTORY" >&2
			continue
		}

		local N
		N=$(wc -l < "$CACHE_PROJECT")
		((N > 0)) && {
			cat "$CACHE_PROJECT" >> "$CACHE_ALL"
			((++PROJECTS))
			((COMMITS += N))
		}
	done

	echo "In $YEAR ${WHO:-you} made $COMMITS commits in $PROJECTS projects."
	((COMMITS > 0)) && {
		commit_message_length < "$CACHE_MESSAGES"
		echo

		echo 'Commits per weekday'
		commits_per_weeday < "$CACHE_ALL" | chart
		echo

		echo 'Commits per month'
		commits_per_month < "$CACHE_ALL" | chart
		echo

		echo 'Lines added (+) and removed (-) per weekday'
		loc_per_weeday < "$CACHE_LOC" | POSITIVES='+' chart
		echo

		echo 'Lines added (+) and removed (-) per month'
		loc_per_month < "$CACHE_LOC" | POSITIVES='+' chart
		echo

		echo 'Top 3 words in commit messages (ignoring words up to three letters)'
		top_words 3 < "$CACHE_MESSAGES" | chart
		echo
	}

	rm_cache
	unset rm_cache
}

# Create annual reports
#
# @param ... - list file of directories or parent directory
process() {
	local QUEUE="$PWD/${0##*/}-$$-queue"
	for F
	do
		if [ -d "$F" ]
		then
			find "$F" -type d -name '.git' >> "$QUEUE"
		else
			cat "$F" >> "$QUEUE"
		fi
	done
	annual_report < "$QUEUE"
	rm -f "$QUEUE"
}

if [ "${BASH_SOURCE[0]}" == "$0" ]
then
	process "$@"
fi

## chart.sh
#!/usr/bin/env bash

readonly MONTHS='Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec'
readonly DAYS='Monday,Tuesday,Wednesday,Thursday,Friday,Saturday,Sunday'

# Extract commit totals from given annual reports
#
# @param ... - annual reports
extract_total() {
	echo "['Name', 'Commits', 'Projects', 'Length of average commit message'],"
	local F REPORTS=
	for F
	do
		COMMITS=$(grep -o 'made [0-9]* commits' < "$F" | cut -d ' ' -f 2)
		PROJECTS=$(grep -o 'in [0-9]* projects' < "$F" | cut -d ' ' -f 2)
		AVERAGE=$(grep -o 'was [0-9]* characters.' < "$F" | cut -d ' ' -f 2)
		echo "['${F##*/}', $((COMMITS)), $((PROJECTS)), $((AVERAGE))],"
	done
}

# Extract a certain stat from given annual reports
#
# @param 1 - pattern
# @param 2 - comma separated list of names
# @param ... - annual reports
extract() {
	local PATTERN=$1
	shift
	local NAMES=$1
	shift
	local F REPORTS=
	for F in "$@"
	do
		[ "$(awk "/$PATTERN/" "$F")" ] || continue
		REPORTS=$REPORTS${REPORTS:+', '}"'""${F##*/}""'"
		local NAME COUNT
		awk 'BEGIN { p = 0 };
			/^$/{ p = 0 };
			{ if (p) print $1, $2 };
			/'"$PATTERN"'/{ p = 1 }' "$F" | while read -r NAME COUNT
		do
			echo "$COUNT" >> "$0_$$_$NAME"
		done
	done
	echo "['Name', $REPORTS],"
	local NAME
	for NAME in ${NAMES//,/ }
	do
		local F="$0_$$_$NAME" COUNTS=
		while read -r
		do
			COUNTS=$COUNTS${COUNTS:+', '}$REPLY
		done < "$F"
		echo "['$NAME', $COUNTS],"
		rm -f "$F"
	done
}

# Generate line charts for given annual reports
#
# @param ... - annual reports
generate_charts() {
	cat << EOF
<!doctype html>
<html>
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0"/>
<style>
.Chart {
	width: 100%;
	height: 500px;
}
</style>
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript">
google.charts.load('current', {'packages':['corechart']})
google.charts.setOnLoadCallback(drawCharts)
function drawCharts() {
	drawBarChart('commits_total', 'Total', [
$(extract_total "$@")
	])
	drawChart('commits_per_day', 'Commits per weekday', [
$(extract 'Commits.*per weekday' "$DAYS" "$@")
	])
	drawChart('commits_per_month', 'Commits per month', [
$(extract 'Commits.*per month' "$MONTHS" "$@")
	])
	drawChart('lines_per_day', 'Lines per weekday', [
$(extract 'Lines.*per weekday' "$DAYS" "$@")
	])
	drawChart('lines_per_month', 'Lines per month', [
$(extract 'Lines.*per month' "$MONTHS" "$@")
	])
}
function drawBarChart(name, title, table) {
	var data = google.visualization.arrayToDataTable(table)

	var options = {
		title: title,
		legend: { position: 'bottom' }
	}

	var chart = new google.visualization.BarChart(
		document.getElementById(name))

	chart.draw(data, options)
}
function drawChart(name, title, table) {
	var data = google.visualization.arrayToDataTable(table)

	var options = {
		title: title,
		curveType: 'none',
		legend: { position: 'bottom' }
	}

	var chart = new google.visualization.LineChart(
		document.getElementById(name))

	chart.draw(data, options)
}
</script>
</head>
<body>
<div id="commits_total" class="Chart"></div>
<div id="commits_per_day" class="Chart"></div>
<div id="commits_per_month" class="Chart"></div>
<div id="lines_per_day" class="Chart"></div>
<div id="lines_per_month" class="Chart"></div>
</body>
</html>
EOF
}

if [ "${BASH_SOURCE[0]}" == "$0" ]
then
	generate_charts "$@"
fi
	#!/usr/bin/env bash

	# Print a bar chart from NAME VALUE pairs given on STDIN
	chart() {
	local TMP MIN=0 MAX=0 NAME VALUE
	TMP=$(mktemp)
	while read -r NAME VALUE
	do
	((VALUE > MAX)) && MAX=$VALUE
	((VALUE < MIN)) && MIN=$VALUE
	echo "$NAME" "$VALUE"
	done > "$TMP"
	local COLS=${COLS:-$(tput cols)}
	((COLS -= 21))
	local BLANK PBAR NBAR
	BLANK=$(printf "%${COLS}s")
	PBAR=${BLANK// /${POSITIVES:-'*'}}
	NBAR=${BLANK// /${NEGATIVES:-'-'}}
	((MIN < 0)) && {
	((MAX -= MIN))
	((MIN = -MIN))
	}
	local F=$(((MAX << 16) / COLS)) BAR FILL
	local BASE=$(((MIN << 16) / F))
	((F < 1)) && F=1
	while read -r NAME VALUE
	do
	if ((VALUE > 0))
	then
	BAR=${BLANK:0:$BASE}
	BAR=$BAR${PBAR:0:$(((VALUE << 16) / F))}
	else
	FILL=$(((-VALUE << 16) / F))
	BAR=${BLANK:0:$((BASE - FILL))}
	BAR=$BAR${NBAR:0:$FILL}
	fi
	printf '%10s %7s %s\n' "$NAME" "$VALUE" "$BAR"
	done < "$TMP"
	rm -rf "$TMP"
	}

	# Calculate average length of commit messages
	commit_message_length() {
	local MESSAGE='' MESSAGES=0 LENGTH=0
	while read -r
	do
	[ -z "$MESSAGE" ] && {
	if [[ "$REPLY" == "{{{"* ]]
	then
	REPLY=${REPLY#* }
	else
	continue
	fi
	}
	MESSAGE=$MESSAGE${REPLY%'}}}'}
	[[ "$REPLY" == *'}}}' ]] && {
	((++MESSAGES))
	((LENGTH += ${#MESSAGE}))
	MESSAGE=
	}
	done
	if ((MESSAGES > 0))
	then
	echo "The average length of a commit message was $((LENGTH / MESSAGES)) characters."
	fi
	}

	# Filter commits into days of the week
	commits_per_weeday() {
	local MON=0 TUE=0 WED=0 THU=0 FRI=0 SAT=0 SUN=0
	while read -r DAY REST
	do
	case "$DAY" in
	Mon*) ((++MON));;
	Tue*) ((++TUE));;
	Wed*) ((++WED));;
	Thu*) ((++THU));;
	Fri*) ((++FRI));;
	Sat*) ((++SAT));;
	Sun*) ((++SUN));;
	esac
	done
	cat << EOF
	Monday $MON
	Tuesday $TUE
	Wednesday $WED
	Thursday $THU
	Friday $FRI
	Saturday $SAT
	Sunday $SUN
	EOF
	}

	# Filter commits into months
	commits_per_month() {
	local JAN=0 FEB=0 MAR=0 APR=0 MAY=0 JUN=0
	local JUL=0 AUG=0 SEP=0 OCT=0 NOV=0 DEC=0
	while read -r _ _ MONTH _
	do
	case "$MONTH" in
	Jan*) ((++JAN));;
	Feb*) ((++FEB));;
	Mar*) ((++MAR));;
	Apr*) ((++APR));;
	May*) ((++MAY));;
	Jun*) ((++JUN));;
	Jul*) ((++JUL));;
	Aug*) ((++AUG));;
	Sep*) ((++SEP));;
	Oct*) ((++OCT));;
	Nov*) ((++NOV));;
	Dec*) ((++DEC));;
	esac
	done
	cat << EOF
	Jan $JAN
	Feb $FEB
	Mar $MAR
	Apr $APR
	May $MAY
	Jun $JUN
	Jul $JUL
	Aug $AUG
	Sep $SEP
	Oct $OCT
	Nov $NOV
	Dec $DEC
	EOF
	}

	# Filter lines of code into days of the week
	loc_per_weeday() {
	local INSERTS=() DELETIONS=() DAY=7
	while read -r FIRST SECOND _
	do
	case "$FIRST" in
	'-') ;;
	[0-9]*)
	((DAY > 6)) && continue
	((FIRST > 0)) && ((INSERTS[DAY] += FIRST))
	((SECOND > 0)) && ((DELETIONS[DAY] += SECOND))
	;;
	Mon*) DAY=0;;
	Tue*) DAY=1;;
	Wed*) DAY=2;;
	Thu*) DAY=3;;
	Fri*) DAY=4;;
	Sat*) DAY=5;;
	Sun*) DAY=6;;
	esac
	done
	cat << EOF
	Monday $((INSERTS[0] - DELETIONS[0]))
	Tuesday $((INSERTS[1] - DELETIONS[1]))
	Wednesday $((INSERTS[2] - DELETIONS[2]))
	Thursday $((INSERTS[3] - DELETIONS[3]))
	Friday $((INSERTS[4] - DELETIONS[4]))
	Saturday $((INSERTS[5] - DELETIONS[5]))
	Sunday $((INSERTS[6] - DELETIONS[6]))
	EOF
	}

	# Filter lines of code into months
	loc_per_month() {
	local INSERTS=() DELETIONS=() MONTH=12
	while read -r FIRST SECOND REST
	do
	case "$FIRST" in
	'-') ;;
	[0-9]*)
	((MONTH > 11)) && continue
	((FIRST > 0)) && ((INSERTS[MONTH] += FIRST))
	((SECOND > 0)) && ((DELETIONS[MONTH] += SECOND))
	;;
	*)
	case "$REST" in
	Jan*) MONTH=0;;
	Feb*) MONTH=1;;
	Mar*) MONTH=2;;
	Apr*) MONTH=3;;
	May*) MONTH=4;;
	Jun*) MONTH=5;;
	Jul*) MONTH=6;;
	Aug*) MONTH=7;;
	Sep*) MONTH=8;;
	Oct*) MONTH=9;;
	Nov*) MONTH=10;;
	Dec*) MONTH=11;;
	esac
	;;
	esac
	done
	cat << EOF
	Jan $((INSERTS[0] - DELETIONS[0]))
	Feb $((INSERTS[1] - DELETIONS[1]))
	Mar $((INSERTS[2] - DELETIONS[2]))
	Apr $((INSERTS[3] - DELETIONS[3]))
	May $((INSERTS[4] - DELETIONS[4]))
	Jun $((INSERTS[5] - DELETIONS[5]))
	Jul $((INSERTS[6] - DELETIONS[6]))
	Aug $((INSERTS[7] - DELETIONS[7]))
	Sep $((INSERTS[8] - DELETIONS[8]))
	Oct $((INSERTS[9] - DELETIONS[9]))
	Nov $((INSERTS[10] - DELETIONS[10]))
	Dec $((INSERTS[11] - DELETIONS[11]))
	EOF
	}

	# Most used words in commit messages; ignoring words up to three letters
	#
	# @param 1 - number of words (optional)
	top_words() {
	grep -Eoa '[a-zA-Z0-9]+' \|
	grep -FvE '(^[a-zA-Z]{1,3}$\|^[0-9]+$)' \|
	sort \|
	uniq -c \|
	sort -rn \|
	head -n "${1:-3}" \| while read -r COUNT WORD
	do
	echo "$WORD $COUNT"
	done
	}

	# Browse all git repositories and create an annual activity report
	#
	# ... - source directories (optional)
	annual_report() {
	local SINCE UNTIL
	YEAR=${YEAR:-$(date +%Y)}
	SINCE="${YEAR}-01-01"
	UNTIL="$((YEAR + 1))-01-01"

	local AUTHOR AUTHOR_TAGS=''
	for AUTHOR in ${AUTHORS:-$(git config user.email)}
	do
	AUTHOR_TAGS=$AUTHOR_TAGS${AUTHOR_TAGS:+' '}"--author=$AUTHOR"
	done

	local PROJECTS=0
	local COMMITS=0

	local CACHE_PREFIX="$PWD/${0##*/}-$$"
	local CACHE_ALL="${CACHE_PREFIX}-all"
	local CACHE_PROJECT="${CACHE_PREFIX}-project"
	local CACHE_LOC="${CACHE_PREFIX}-loc"
	local CACHE_MESSAGES="${CACHE_PREFIX}-messages"
	rm_cache() {
	rm -f "${CACHE_PREFIX}"*
	}
	rm_cache

	local DIRECTORY
	while read -r DIRECTORY
	do
	DIRECTORY=${DIRECTORY%/.git}

	# $AUTHOR_TAGS and *_EXTRA_ARGS are expanded and cannot be quoted
	# shellcheck disable=SC2086
	(cd "$DIRECTORY" && [ -d '.git' ] &&
	git log \
	--branches \
	--since="$SINCE" \
	--until="$UNTIL" \
	--format='tformat:%aD' \
	$AUTHOR_TAGS \
	$PROJECTS_EXTRA_ARGS > "$CACHE_PROJECT" &&
	git log \
	--numstat \
	--branches \
	--since="$SINCE" \
	--until="$UNTIL" \
	--format='tformat:%aD' \
	$AUTHOR_TAGS \
	$LOC_EXTRA_ARGS >> "$CACHE_LOC" &&
	git log \
	--branches \
	--since="$SINCE" \
	--until="$UNTIL" \
	--format='tformat:{{{%B}}}' \
	$AUTHOR_TAGS \
	$MESSAGES_EXTRA_ARGS >> "$CACHE_MESSAGES"
	) \|\| {
	echo "error: failed to process $DIRECTORY" >&2
	continue
	}

	local N
	N=$(wc -l < "$CACHE_PROJECT")
	((N > 0)) && {
	cat "$CACHE_PROJECT" >> "$CACHE_ALL"
	((++PROJECTS))
	((COMMITS += N))
	}
	done

	echo "In $YEAR ${WHO:-you} made $COMMITS commits in $PROJECTS projects."
	((COMMITS > 0)) && {
	commit_message_length < "$CACHE_MESSAGES"
	echo

	echo 'Commits per weekday'
	commits_per_weeday < "$CACHE_ALL" \| chart
	echo

	echo 'Commits per month'
	commits_per_month < "$CACHE_ALL" \| chart
	echo

	echo 'Lines added (+) and removed (-) per weekday'
	loc_per_weeday < "$CACHE_LOC" \| POSITIVES='+' chart
	echo

	echo 'Lines added (+) and removed (-) per month'
	loc_per_month < "$CACHE_LOC" \| POSITIVES='+' chart
	echo

	echo 'Top 3 words in commit messages (ignoring words up to three letters)'
	top_words 3 < "$CACHE_MESSAGES" \| chart
	echo
	}

	rm_cache
	unset rm_cache
	}

	# Create annual reports
	#
	# @param ... - list file of directories or parent directory
	process() {
	local QUEUE="$PWD/${0##*/}-$$-queue"
	for F
	do
	if [ -d "$F" ]
	then
	find "$F" -type d -name '.git' >> "$QUEUE"
	else
	cat "$F" >> "$QUEUE"
	fi
	done
	annual_report < "$QUEUE"
	rm -f "$QUEUE"
	}

	if [ "${BASH_SOURCE[0]}" == "$0" ]
	then
	process "$@"
	fi
	#!/usr/bin/env bash

	readonly MONTHS='Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec'
	readonly DAYS='Monday,Tuesday,Wednesday,Thursday,Friday,Saturday,Sunday'

	# Extract commit totals from given annual reports
	#
	# @param ... - annual reports
	extract_total() {
	echo "['Name', 'Commits', 'Projects', 'Length of average commit message'],"
	local F REPORTS=
	for F
	do
	COMMITS=$(grep -o 'made [0-9]* commits' < "$F" \| cut -d ' ' -f 2)
	PROJECTS=$(grep -o 'in [0-9]* projects' < "$F" \| cut -d ' ' -f 2)
	AVERAGE=$(grep -o 'was [0-9]* characters.' < "$F" \| cut -d ' ' -f 2)
	echo "['${F##*/}', $((COMMITS)), $((PROJECTS)), $((AVERAGE))],"
	done
	}

	# Extract a certain stat from given annual reports
	#
	# @param 1 - pattern
	# @param 2 - comma separated list of names
	# @param ... - annual reports
	extract() {
	local PATTERN=$1
	shift
	local NAMES=$1
	shift
	local F REPORTS=
	for F in "$@"
	do
	[ "$(awk "/$PATTERN/" "$F")" ] \|\| continue
	REPORTS=$REPORTS${REPORTS:+', '}"'""${F##*/}""'"
	local NAME COUNT
	awk 'BEGIN { p = 0 };
	/^$/{ p = 0 };
	{ if (p) print $1, $2 };
	/'"$PATTERN"'/{ p = 1 }' "$F" \| while read -r NAME COUNT
	do
	echo "$COUNT" >> "$0_$$_$NAME"
	done
	done
	echo "['Name', $REPORTS],"
	local NAME
	for NAME in ${NAMES//,/ }
	do
	local F="$0_$$_$NAME" COUNTS=
	while read -r
	do
	COUNTS=$COUNTS${COUNTS:+', '}$REPLY
	done < "$F"
	echo "['$NAME', $COUNTS],"
	rm -f "$F"
	done
	}

	# Generate line charts for given annual reports
	#
	# @param ... - annual reports
	generate_charts() {
	cat << EOF
	<!doctype html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0"/>
	<style>
	.Chart {
	width: 100%;
	height: 500px;
	}
	</style>
	<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
	<script type="text/javascript">
	google.charts.load('current', {'packages':['corechart']})
	google.charts.setOnLoadCallback(drawCharts)
	function drawCharts() {
	drawBarChart('commits_total', 'Total', [
	$(extract_total "$@")
	])
	drawChart('commits_per_day', 'Commits per weekday', [
	$(extract 'Commits.*per weekday' "$DAYS" "$@")
	])
	drawChart('commits_per_month', 'Commits per month', [
	$(extract 'Commits.*per month' "$MONTHS" "$@")
	])
	drawChart('lines_per_day', 'Lines per weekday', [
	$(extract 'Lines.*per weekday' "$DAYS" "$@")
	])
	drawChart('lines_per_month', 'Lines per month', [
	$(extract 'Lines.*per month' "$MONTHS" "$@")
	])
	}
	function drawBarChart(name, title, table) {
	var data = google.visualization.arrayToDataTable(table)

	var options = {
	title: title,
	legend: { position: 'bottom' }
	}

	var chart = new google.visualization.BarChart(
	document.getElementById(name))

	chart.draw(data, options)
	}
	function drawChart(name, title, table) {
	var data = google.visualization.arrayToDataTable(table)

	var options = {
	title: title,
	curveType: 'none',
	legend: { position: 'bottom' }
	}

	var chart = new google.visualization.LineChart(
	document.getElementById(name))

	chart.draw(data, options)
	}
	</script>
	</head>
	<body>
	<div id="commits_total" class="Chart"></div>
	<div id="commits_per_day" class="Chart"></div>
	<div id="commits_per_month" class="Chart"></div>
	<div id="lines_per_day" class="Chart"></div>
	<div id="lines_per_month" class="Chart"></div>
	</body>
	</html>
	EOF
	}

	if [ "${BASH_SOURCE[0]}" == "$0" ]
	then
	generate_charts "$@"
	fi