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improve compatibility and portability #8

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98 changes: 81 additions & 17 deletions git-activity
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ function usage() {
cat <<EOF
Usage: $0 [-h] [-n] [-s style]

Display an activity graph (like the contribution graph on GitHub) for the
Display an activity graph (like the contribution graph on GitHub) for the
current git repository and branch

Available options:
Expand Down Expand Up @@ -62,30 +62,89 @@ esac
# Use GNU date if available
if date --version >/dev/null 2>&1 ; then
function _date { date "$@" ;}
elif gdate >/dev/null 2>&1 ; then
elif command -v gdate >/dev/null 2>&1 ; then
function _date { gdate "$@" ;}
else
echo "You need to install coreutils to run this script (command 'gdate' is not available).";
exit 1;
# Try to use system date (BSD/macOS)
function _date {
# For BSD date on macOS
if [[ "$1" == "--date" ]] || [[ "$1" == "-d" ]]; then
shift
# Try to parse the date - this is a simplified version
if [[ "$1" =~ ^[0-9]+\ year ]]; then
# Handle relative dates like "1 year ago"
python3 -c "
import datetime, sys, re
from dateutil.relativedelta import relativedelta
try:
from dateutil import parser
now = datetime.datetime.now()
text = sys.argv[1]
if 'year ago' in text:
years = int(text.split()[0])
dt = now - relativedelta(years=years)
print(dt.strftime('%Y-%m-%d'))
except ImportError:
# Fallback if dateutil not installed
import subprocess
subprocess.run(['date', '-v', '-1y', '+%Y-%m-%d'])
" "$1" 2>/dev/null || date -v-1y "+%Y-%m-%d"
else
# Try to parse absolute date
date -jf "%Y-%m-%d" "$1" "+%s" 2>/dev/null || date "$@"
fi
else
date "$@"
fi
}
fi

# Process commits per day
declare -A commits_per_day
# Using a more compatible approach instead of associative arrays
declare -a commits_per_day
for i in {0..371}; do
commits_per_day[i]=0
done

commits_max=0
since=$(_date -d "$(_date -d '1 year ago + 1 day' +"%F -%u day")" +"%s")
while read -r commits_n commits_date; do
# Get since date - 1 year ago
since_str=$(_date -d "1 year ago" "+%Y-%m-%d" 2>/dev/null || _date -v-1y "+%Y-%m-%d")
since=$(_date -d "${since_str}" "+%s" 2>/dev/null || _date -jf "%Y-%m-%d" "${since_str}" "+%s")

# Process git log output
while IFS= read -r line; do
if [[ -z "$line" ]]; then continue; fi

# Parse uniq -c output (leading whitespace, count, date)
commits_n=$(echo "$line" | awk '{print $1}')
commits_date=$(echo "$line" | awk '{print $2}')

if [[ -z "$commits_date" ]]; then continue; fi

(( commits_n > commits_max )) && commits_max=$commits_n
date_diff=$(( ($(_date --date="${commits_date} 13:00 UTC" "+%s") - since) / (60*60*24) ))
commits_per_day["${date_diff}"]=$commits_n
done <<< $(git log --since="${since}" --date=short --pretty=format:'%ad' | uniq -c)

# Calculate days difference
date_ts=$(_date -d "${commits_date} 13:00 UTC" "+%s" 2>/dev/null || _date -jf "%Y-%m-%d" "${commits_date}" "+%s")
date_diff=$(( (date_ts - since) / (60*60*24) ))

# Store if within range
if (( date_diff >= 0 && date_diff < 372 )); then
commits_per_day[date_diff]=$commits_n
fi
done < <(git log --since="${since_str}" --date=short --pretty=format:'%ad' 2>/dev/null | sort | uniq -c)

# If no commits found, set a default max to avoid division by zero
if (( commits_max == 0 )); then
commits_max=1
fi

# Print name of months
current_month=$(_date "+%b")
limit_columns=$(( 2 - ${#space} ))
weeks_in_month=$(( limit_columns + 1 ))
printf "\e[m "
for week_n in $(seq 0 52); do
month_week=$(_date -d "1 year ago + ${week_n} weeks" "+%b")
month_week=$(_date -d "1 year ago + ${week_n} weeks" "+%b" 2>/dev/null || _date -v-1y -v+"${week_n}w" "+%b")
if [[ "${current_month}" != "${month_week}" ]]; then
current_month=$month_week
weeks_in_month=0
Expand All @@ -104,24 +163,29 @@ for day_n in $(seq 0 6); do
printf '\e[m%-4s' "${name_of_days[day_n]}"
for week_n in $(seq 0 52); do
key=$(( week_n * 7 + day_n ))
if [[ -v commits_per_day["${key}"] ]]; then
value=$(( ${commits_per_day["${key}"]}00 / commits_max))
if (( value <= 25 )); then
value=${commits_per_day[key]:-0}

if (( value > 0 )); then
scaled_value=$(( value * 100 / commits_max ))
if (( scaled_value <= 25 )); then
# Low activity
printf "\x1b[38;5;22m%s%s" "$char_full" "$space"
elif (( value <= 50 )); then
elif (( scaled_value <= 50 )); then
# Mid-low activity
printf "\x1b[38;5;28m%s%s" "$char_full" "$space"
elif (( value <= 75 )); then
elif (( scaled_value <= 75 )); then
# Mid-high activity
printf "\x1b[38;5;34m%s%s" "$char_full" "$space"
else
# High activity
printf "\x1b[38;5;40m%s%s" "$char_full" "$space"
fi
elif [ $key -lt $last_day ]; then
elif (( key < last_day )); then
# No activity
printf "\x1b[38;5;250m%s%s" "$char_void" "$space"
else
# Future or no data
printf " "
fi
done
printf "\n"
Expand Down