#!/usr/bin/env bash

# vim:ts=4:sts=4:sw=4:et

#

# Author: Hari Sekhon

# Date: 2024-10-03 10:41:23 +0300 (Thu, 03 Oct 2024)

#

# https///github.com/HariSekhon/DevOps-Bash-tools

#

# License: see accompanying Hari Sekhon LICENSE file

#

# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish

#

# https://www.linkedin.com/in/HariSekhon

#

set -euo pipefail

[ -n "${DEBUG:-}" ] && set -x

srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# shellcheck disable=SC1090,SC1091

. "$srcdir/lib/git.sh"

repolist="$(readlink -f "$srcdir/../setup/repos.txt")"

code="git_commit_times.gnuplot"

data="data/git_commit_times.dat"

image="images/git_commit_times.png"

# shellcheck disable=SC2034,SC2154

usage_description="

Generates a GNUplot graph of Git commit times from all adjacent Git repos listed in:

$repolist

Generates the following files:

$code - Code

$data - Data

$image - Image

A MermaidJS version of this script is adjacent at:

git_graph_commit_times_mermaidjs.sh

These adjacent scripts perform a similar function but using GitHub API commit data:

../github/github_graph_commit_times_gnuplot.sh

../github/github_graph_commit_times_mermaidjs.sh

A Golang version of this program which uses the GitHub API can be found here:

https://github.com/HariSekhon/GitHub-Graph-Commit-Times

Requires Git and GNUplot to be installed to generate the graph

"

# used by usage() in lib/utils.sh

# shellcheck disable=SC2034

usage_args=""

help_usage "$@"

num_args 0 "$@"

for x in $code \

$data \

$image; do

mkdir -p -v "$(dirname "$x")"

done

if ! [ -f "$data" ]; then

timestamp "Getting list of Git repo checkout directories from: $repolist"

repo_dirs="$(sed 's/#.*//; s/.*://; /^[[:space:]]*$/d' "$repolist")"

timestamp "Found repos: $(wc -l <<< "$repo_dirs" | sed 's/[[:space:]]/g')"

echo

while read -r repo_dir; do

repo_dir="$(readlink -f "$srcdir/../../$repo_dir")"

timestamp "Entering repo dir: $repo_dir"

pushd "$repo_dir" &>/dev/null || die "Failed to pushd to: $repo_dir"

timestamp "Fetching Hour of all commits from Git log"

git log --date=format:'%H' --pretty=format:'%ad'

popd &>/dev/null || die "Failed to popd from: $repo_dir"

echo

done <<< "$repo_dirs" |

sort |

uniq -c |

awk '{print $2" "$1}' > "$data"

echo

fi

timestamp "Generating GNUplot code for Commits per Hour"

sed '/^[[:space:]]*$/d' > "$code" <<EOF

#

# Generated by ${0##*/}

#

# from https://github.com/HariSekhon/DevOps-Bash-tools

#

set terminal pngcairo size 1280,720 enhanced font "Arial,14"

set ylabel "Number of Commits"

set grid

#set xtics rotate by -45

set boxwidth 0.8 relative

set style fill solid

set datafile separator " "

set title "Git Commits by Hour"

set xlabel "Hour of Day"

# results in X axis labels every 2 years

#set xdata time

#set timefmt "%H"

#set format x "%H"

# trick to get X axis labels for every year

stats "$data" using 1 nooutput

set xrange [STATS_min:STATS_max]

set xtics 1

set output "$image"

plot "$data" using 1:2 with boxes title 'Commits'

EOF

timestamp "Generated GNUplot code: $code"

timestamp "Generating bar chart for Commits per Hour"

gnuplot "$code"

timestamp "Generated bar chart image: $image"

echo

if is_CI; then

exit 0

fi

timestamp "Opening: $image"

"$srcdir/../bin/imageopen.sh" "$image"