git-log-branches-test

#!/bin/bash

d=/tmp/git-test

git init -q -b master "$d"
cd "$d" || exit

for i in $(seq 1000); do
	git commit -q -m commit --allow-empty
done

cd "$d" || exit

echo -e "\n# warm cache"

time git log > /dev/null

echo -e "\n# felipec"

git_log_branches_f() {
	while read -r id; do
		IFS=$'\n' read -r -d '' -a branches < <(git branch --format='%(refname:short)' --contains "$id")
		git --no-pager show --format="commit %H%nAuthor: %an <%ae>%nDate: %ad%nBranches: ${branches[*]}%n%n%w(76,4,4)%B" --quiet "$id"
	done < <(git log --format='%H' "$@")
}

time git_log_branches_f > /dev/null
time git_log_branches_f > /dev/null
time git_log_branches_f > /dev/null

echo -e "\n# felipec original"

git_log_branches_fo() {
	while read -r -d $'\0' commit; do
		id=${commit#commit }
		id=${id%%$'\n'*}
		IFS=$'\n' read -r -d '' -a branches < <(git branch --format='%(refname:short)' --contains "$id")
		echo -e "${commit/BRANCHES/${branches[*]}}\n"
	done < <(git log --format="tformat:commit %H%nAuthor: %an <%ae>%nDate: %ad%nBranches: BRANCHES%n%n%w(76,4,4)%B%w()%x00" "$@")
}

time git_log_branches_fo > /dev/null
time git_log_branches_fo > /dev/null
time git_log_branches_fo > /dev/null

echo -e "\n# kriegaex"

git_log_branches_k() {
	git log --pretty=format:"commit %H%nAuthor:   %an %ae%nDate:     %ad%nBranches:%H%n%n%s%n%n%b%n" "$@" |
		sed -E "s/^(Branches:)(.*)/echo -n '\1'; git branch --contains \2 --format=' %(refname:strip=2)' | tr '\n' ','/e"
}

time git_log_branches_k > /dev/null
time git_log_branches_k > /dev/null
time git_log_branches_k > /dev/null

echo -e "\n# kriegaex new"

git_log_branches_kn() {
	git --no-pager log --quiet --pretty=format:"commit %H%nAuthor:   %an <%ae>%nDate:     %ad%nBranches: %H%n%n%w(76,4,4)%B" "$@" | while read -r LINE; do
		if [ "${LINE:0:10}" = "Branches: " ]; then
			echo "Branches: $(git branch --contains ${LINE:10} --format='%(refname:short)' | tr '\n' ' ')"
		else
			echo "$LINE"
		fi
	done
}

time git_log_branches_kn > /dev/null
time git_log_branches_kn > /dev/null
time git_log_branches_kn > /dev/null