#!/bin/bash

tempfile="$(tempfile)"

# how can I get the --graph with only the desired commits?

if [ "$EDITOR" == "emacs" ]; then
    force_color=--color=always
else
    force_color=""
fi

esccolor="\(\|`printf '\033\[[0-9;]*m\)'`"

cat "$1" \
    | sed -n -e '/^pick/ s/pick \([^ ]*\) .*$/\1/ p' \
    | tac \
    | xargs -n 1 git log -1 --oneline --decorate --graph --name-status $force_color \
    | sed -e "s~^\* ~pick ~" \
          > "$tempfile"

# with --graph, if there are actually any pipes, use (+ color handling):
# | sed -e 's~^\([ |\\/*]* \)\([0-9a-f][0-9a-f]* \)~\1pick \2~' \

echo >> "$tempfile"
echo "## Originial git rebase -i data:" >> "$tempfile"
cat "$1" | sed -e 's/^/## /' -e "s/^## $//" -e "s/^## #/#/" >> "$tempfile"

if [ "$EDITOR" == "emacs" ]; then
    emacs --eval "(with-current-buffer (find-file \"$tempfile\") (require 'ansi-color) (ansi-color-apply-on-region (point-min) (point-max)) (save-buffer))"
else
    editor "$tempfile"
fi

# p, pick
# r, reword
# e, edit
# s, squash
# f, fixup
# x, exec
# d, drop

commands='p\|pick\|r\|reword\|e\|edit\|s\|squash\|f\|fixup\|x\|exec\|d\|drop'

cat "$tempfile" \
    | grep -v "^#" \
    | grep -v "^ *[|\\/][ |\\/]*[^|\\/*]" \
    | tac \
    | sed -e 's~^\([ |\\/*]* \)\(\('"$commands"'\)[0-9a-f][0-9a-f]* \)~\2~' \
    | tee "$1" >&2