Re: [PATCH 3/3] rebase: new convenient option to edit a single commit

[Eric Sunshine <sunshine@sunshineco.com>]

On Sat, Mar 1, 2014 at 9:53 PM, Nguyễn Thái Ngọc Duy <pclouds@gmail.com> wrote:
> "git rebase -e XYZ" is basically the same as
>
> EDITOR="sed -i '1s/pick XYZ/edit XYZ/' $@" \
> git rebase -i XYZ^
>
> In English, it prepares the todo list for you to edit only commit XYZ
> to save your time. The time saving is only significant when you edit a
> lot of commits separately.

Should this accept multiple -e arguments? Based upon the above
justification, it sounds like it should, and I think that would be the
intuitive expectation (at least for me).

The current implementation, however, is broken with multiple -e arguments. With:

    git rebase -i -e older -e newer

'newer' is ignored entirely. However, with:

    git rebase -i -e newer -e older

it errors out when rewriting the todo list:

    "expected to find 'edit older' line but did not"

An implementation supporting multiple -e arguments would need to
ensure that the todo list extends to the "oldest" rev specified by any
-e argument.

> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
> ---
>  Documentation/git-rebase.txt |  4 ++++
>  git-rebase--interactive.sh   | 17 ++++++++++++++---
>  git-rebase.sh                | 10 ++++++++++
>  3 files changed, 28 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
> index 52c3561..b8c263d 100644
> --- a/Documentation/git-rebase.txt
> +++ b/Documentation/git-rebase.txt
> @@ -359,6 +359,10 @@ unless the `--fork-point` option is specified.
>         user edit that list before rebasing.  This mode can also be used to
>         split commits (see SPLITTING COMMITS below).
>
> +-e::
> +--edit-one::
> +       Prepare the todo list to edit only the commit at <upstream>
> +
>  -p::
>  --preserve-merges::
>         Instead of ignoring merges, try to recreate them.
> diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
> index a1adae8..4762d57 100644
> --- a/git-rebase--interactive.sh
> +++ b/git-rebase--interactive.sh
> @@ -1040,9 +1040,20 @@ fi
>  has_action "$todo" ||
>         die_abort "Nothing to do"
>
> -cp "$todo" "$todo".backup
> -git_sequence_editor "$todo" ||
> -       die_abort "Could not execute editor"
> +if test -n "$edit_one"
> +then
> +       edit_one="`git rev-parse --short $edit_one`"
> +       sed "1s/pick $edit_one /edit $edit_one /" "$todo" > "$todo.new" ||
> +               die_abort "failed to update todo list"
> +       grep "^edit $edit_one " "$todo.new" >/dev/null ||
> +               die_abort "expected to find 'edit $edit_one' line but did not"
> +       mv "$todo.new" "$todo" ||
> +               die_abort "failed to update todo list"
> +else
> +       cp "$todo" "$todo".backup
> +       git_sequence_editor "$todo" ||
> +               die_abort "Could not execute editor"
> +fi
>
>  has_action "$todo" ||
>         die_abort "Nothing to do"
> diff --git a/git-rebase.sh b/git-rebase.sh
> index 33face1..b8b6aa9 100755
> --- a/git-rebase.sh
> +++ b/git-rebase.sh
> @@ -32,6 +32,7 @@ verify             allow pre-rebase hook to run
>  rerere-autoupdate  allow rerere to update index with resolved conflicts
>  root!              rebase all reachable commits up to the root(s)
>  autosquash         move commits that begin with squash!/fixup! under -i
> +e,edit-one!        generate todo list to edit this commit
>  committer-date-is-author-date! passed to 'git am'
>  ignore-date!       passed to 'git am'
>  whitespace=!       passed to 'git apply'
> @@ -339,6 +340,10 @@ do
>         -NUM=*)
>                 NUM="${1#-NUM=}"
>                 ;;
> +       --edit-one)
> +               interactive_rebase=explicit
> +               edit_one=t
> +               ;;
>         --)
>                 shift
>                 break
> @@ -463,6 +468,11 @@ then
>                 ;;
>         *)      upstream_name="$1"
>                 shift
> +               if test -n "$edit_one"
> +               then
> +                       edit_one="$upstream_name"
> +                       upstream_name="$upstream_name^"
> +               fi
>                 ;;
>         esac
>         upstream=$(peel_committish "${upstream_name}") ||
> --
> 1.9.0.40.gaa8c3ea
>
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