rebase: remove unused code paths from git_rebase__interactive

Since git_rebase__interactive is now never called with
$preserve_merges = t we can remove those code paths.

Signed-off-by: Wink Saville <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: winksaville

git-rebase--interactive.sh

@@ -961,100 +961,13 @@ git_rebase__interactive () {
 	setup_reflog_action
 	init_basic_state
 
-	if test t = "$preserve_merges"
-	then
-		if test -z "$rebase_root"
-		then
-			mkdir "$rewritten" &&
-			for c in $(git merge-base --all $orig_head $upstream)
-			do
-				echo $onto > "$rewritten"/$c ||
-					die "$(gettext "Could not init rewritten commits")"
-			done
-		else
-			mkdir "$rewritten" &&
-			echo $onto > "$rewritten"/root ||
-				die "$(gettext "Could not init rewritten commits")"
-		fi
-		# No cherry-pick because our first pass is to determine
-		# parents to rewrite and skipping dropped commits would
-		# prematurely end our probe
-		merges_option=
-	else
-		merges_option="--no-merges --cherry-pick"
-	fi
+	merges_option="--no-merges --cherry-pick"
 
 	init_revisions_and_shortrevisions
 
-	if test t != "$preserve_merges"
-	then
-		git rebase--helper --make-script ${keep_empty:+--keep-empty} \
-			$revisions ${restrict_revision+^$restrict_revision} >"$todo" ||
-		die "$(gettext "Could not generate todo list")"
-	else
-		format=$(git config --get rebase.instructionFormat)
-		# the 'rev-list .. | sed' requires %m to parse; the instruction requires %H to parse
-		git rev-list $merges_option --format="%m%H ${format:-%s}" \
-			--reverse --left-right --topo-order \
-			$revisions ${restrict_revision+^$restrict_revision} | \
-			sed -n "s/^>//p" |
-		while read -r sha1 rest
-		do
-
-			if test -z "$keep_empty" && is_empty_commit $sha1 && ! is_merge_commit $sha1
-			then
-				comment_out="$comment_char "
-			else
-				comment_out=
-			fi
-
-			if test -z "$rebase_root"
-			then
-				preserve=t
-				for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -s -f2-)
-				do
-					if test -f "$rewritten"/$p
-					then
-						preserve=f
-					fi
-				done
-			else
-				preserve=f
-			fi
-			if test f = "$preserve"
-			then
-				touch "$rewritten"/$sha1
-				printf '%s\n' "${comment_out}pick $sha1 $rest" >>"$todo"
-			fi
-		done
-	fi
-
-	# Watch for commits that been dropped by --cherry-pick
-	if test t = "$preserve_merges"
-	then
-		mkdir "$dropped"
-		# Save all non-cherry-picked changes
-		git rev-list $revisions --left-right --cherry-pick | \
-			sed -n "s/^>//p" > "$state_dir"/not-cherry-picks
-		# Now all commits and note which ones are missing in
-		# not-cherry-picks and hence being dropped
-		git rev-list $revisions |
-		while read rev
-		do
-			if test -f "$rewritten"/$rev &&
-			   ! sane_grep "$rev" "$state_dir"/not-cherry-picks >/dev/null
-			then
-				# Use -f2 because if rev-list is telling us this commit is
-				# not worthwhile, we don't want to track its multiple heads,
-				# 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"/$rev
-				sha1=$(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
-	fi
+	git rebase--helper --make-script ${keep_empty:+--keep-empty} \
+		$revisions ${restrict_revision+^$restrict_revision} >"$todo" ||
+	die "$(gettext "Could not generate todo list")"
 
 	complete_action
 }