I have tried to fix this before: see 568950388be2, but it doesn't
really work.

I don't know how it happend, but that commit makes interactive rebase to
respect core.abbrev only during --edit-todo, but not the initial todo
list edit.

For this time I've included a test-case to avoid this frustration again.

The patch change code to use full 40-hex revision ids for todo actions
everywhere and collapse them only to show to user.

Signed-off-by: Kirill A. Shutemov <[email protected]>
---
 v3:
    - use full 40-hex revision ids for todo actions everywhere and collapse them
      only to show to user;
 v2:
    - fix &&-chain in the test-case
---
 git-rebase--interactive.sh    | 17 ++++++++---------
 t/t3404-rebase-interactive.sh |  7 +++++++
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index c6a4629cbc2b..c96b9847e9fc 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -961,14 +961,13 @@ else
        revisions=$onto...$orig_head
        shortrevisions=$shorthead
 fi
-git rev-list $merges_option --pretty=oneline --abbrev-commit \
-       --abbrev=7 --reverse --left-right --topo-order \
+git rev-list $merges_option --pretty=oneline --reverse --left-right 
--topo-order \
        $revisions ${restrict_revision+^$restrict_revision} | \
        sed -n "s/^>//p" |
-while read -r shortsha1 rest
+while read -r sha1 rest
 do
 
-       if test -z "$keep_empty" && is_empty_commit $shortsha1 && ! 
is_merge_commit $shortsha1
+       if test -z "$keep_empty" && is_empty_commit $sha1 && ! is_merge_commit 
$sha1
        then
                comment_out="$comment_char "
        else
@@ -977,9 +976,8 @@ do
 
        if test t != "$preserve_merges"
        then
-               printf '%s\n' "${comment_out}pick $shortsha1 $rest" >>"$todo"
+               printf '%s\n' "${comment_out}pick $sha1 $rest" >>"$todo"
        else
-               sha1=$(git rev-parse $shortsha1)
                if test -z "$rebase_root"
                then
                        preserve=t
@@ -996,7 +994,7 @@ do
                if test f = "$preserve"
                then
                        touch "$rewritten"/$sha1
-                       printf '%s\n' "${comment_out}pick $shortsha1 $rest" 
>>"$todo"
+                       printf '%s\n' "${comment_out}pick $sha1 $rest" >>"$todo"
                fi
        fi
 done
@@ -1020,8 +1018,8 @@ then
                        # just the history of its first-parent for others that 
will
                        # be rebasing on top of it
                        git rev-list --parents -1 $rev | cut -d' ' -s -f2 > 
"$dropped"/$rev
-                       short=$(git rev-list -1 --abbrev-commit --abbrev=7 $rev)
-                       sane_grep -v "^[a-z][a-z]* $short" <"$todo" > 
"${todo}2" ; mv "${todo}2" "$todo"
+                       sha1=$(git rev-list -1 $rev)
+                       sane_grep -v "^[a-z][a-z]* $sha1" <"$todo" > "${todo}2" 
; mv "${todo}2" "$todo"
                        rm "$rewritten"/$rev
                fi
        done
@@ -1054,6 +1052,7 @@ has_action "$todo" ||
        return 2
 
 cp "$todo" "$todo".backup
+collapse_todo_ids
 git_sequence_editor "$todo" ||
        die_abort "Could not execute editor"
 
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index 8197ed29a9ec..a31f7e0430e1 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -1039,4 +1039,11 @@ test_expect_success 'short SHA-1 collide' '
        )
 '
 
+test_expect_success 'respect core.abbrev' '
+       git config core.abbrev 12 &&
+       set_cat_todo_editor &&
+       test_must_fail git rebase -i HEAD~4 >todo-list &&
+       test 4 = $(grep -c "pick [0-9a-f]\{12,\}" todo-list)
+'
+
 test_done
-- 
2.1.4

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