git-branch-description

#!/bin/bash
#
# Show a bunch of information about a given branch.
#

if [ -t 1 ]; then
    readonly BOLD=`tput bold`
    readonly YELLOW=`tput setaf 3`
    readonly RESET=`tput sgr0`
    readonly COLS=`tput cols`
else
    readonly COLS=80
fi

if [ "$1" = "--help" ]; then
    echo "Usage: `basename $0` <branch> <upstream>"
    exit 0
fi

branch=$1
if [ -z "$branch" ]; then
    branch=`git symbolic-ref --short HEAD`
fi

set -e
git log -n1 $branch > /dev/null
set +e

readonly first_date=`git reflog --format=format:%cd $branch | tail -n 2 | head -n 1`
readonly last_date=`git reflog -n 1 --format=format:%cd $branch`

echo "Branch       $BOLD$branch$RESET"
echo "Branched:    $YELLOW$first_date$RESET"
echo "Last commit: $YELLOW$last_date$RESET"
readonly description=`git config branch.$branch.description`
if [ -z "$description" ]; then
    echo ""
    echo "This branch has no description. Use:"
    echo "    git branch --edit-description <branch>"
else
    echo ""
    echo $description | fold -s
fi
echo ""

upstream=$2
if [ -z "$upstream" ]; then
    upstream=`git symbolic-ref --short HEAD`
fi
if [ "$upstream" != "$branch" ]; then
    printf '%*s' "${C:-$(($COLS/2-9))}" | tr ' ' =
    printf "$YELLOW Unmerged commits$RESET "
    printf '%*s\n' "${C:-$(($COLS/2-9))}" | tr ' ' =

    readonly mergebase=`git merge-base $branch $upstream`
    readonly branchsha=`git rev-list -n1 $branch`
    readonly upstreamsha=`git rev-list -n1 $upstream`

    if [ "$mergebase" = "$upstreamsha" ] || [ "$mergebase" = "$branchsha" ]; then
        echo ""
        echo "Branch $branch already merged into $upstream"
        echo ""
    else
        echo "Commits on $RESET$BOLD$branch$RESET not in $BOLD$upstream$RESET:"
        git cherry -v $upstream $branch | grep "^+" | sed -e "s/^+ /$YELLOW/" | sed -e "s/ /$RESET /"
        echo ""

        echo "Commits on $BOLD$branch$RESET already merged to $BOLD$upstream$RESET:"
        git cherry -v $upstream $branch | grep "^-" | sed -e "s/^- /$YELLOW/" | sed -e "s/ /$RESET /"
        echo ""
    fi
fi

printf '%*s' "${C:-$(($COLS/2-5))}" | tr ' ' =
printf "${YELLOW} Activity $RESET"
printf '%*s\n' "${C:-$(($COLS/2-5))}" | tr ' ' =

git --no-pager reflog -v -n40 --date=relative --grep-reflog="from $branch" --grep-reflog="to $branch" HEAD


#git --no-pager reflog show --pretty --no-abbrev-commit $branch