[TopGit PATCH 02/10] pretty_tree: globalize and respect -i/-w options

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Signed-off-by: Bert Wesarg <bert.wesarg@xxxxxxxxxxxxxx>
---
 tg-export.sh |   13 ++-----------
 tg.sh        |   47 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 11 deletions(-)

diff --git a/tg-export.sh b/tg-export.sh
index 6d82d55..5c707ce 100644 tg-export.sh
--- a/tg-export.sh
+++ b/tg-export.sh
@@ -63,15 +63,6 @@ trap 'rm -rf "$playground"' EXIT
 
 ## Collapse driver
 
-# pretty_tree NAME
-# Output tree ID of a cleaned-up tree without tg's artifacts.
-pretty_tree()
-{
-	git ls-tree --full-tree "$1" \
-	| awk -F '	' '$2 !~ /^.top/' \
-	| git mktree
-}
-
 create_tg_commit()
 {
 	name="$1"
@@ -112,7 +103,7 @@ collapsed_commit()
 			echo "TopGit-driven merge of branches:"
 			echo
 			cut -f 2 "$playground/$name^parents"
-		} | git commit-tree "$(pretty_tree "refs/top-bases/$name")" \
+		} | git commit-tree "$(pretty_tree "$name" -b)" \
 			$(for p in $parent; do echo -p $p; done))"
 	fi
 
@@ -227,7 +218,7 @@ linearize()
 	else
 		retmerge=0;
 
-		git merge-recursive "$(pretty_tree "refs/top-bases/$_dep")" -- HEAD "$(pretty_tree "refs/heads/$_dep")" || retmerge="$?";
+		git merge-recursive "$(pretty_tree "$_dep" -b)" -- HEAD "$(pretty_tree "refs/heads/$_dep")" || retmerge="$?";
 
 		if test "x$retmerge" != "x0"; then
 			git rerere;
diff --git a/tg.sh b/tg.sh
index 4d7d4ef..308ed28 100644 tg.sh
--- a/tg.sh
+++ b/tg.sh
@@ -42,6 +42,53 @@ cat_file()
 	esac
 }
 
+# get tree for the committed topic
+get_tree_()
+{
+	echo "$1"
+}
+
+# get tree for the base
+get_tree_b()
+{
+	echo "refs/top-bases/$1"
+}
+
+# get tree for the index
+get_tree_i()
+{
+	git write-tree
+}
+
+# get tree for the worktree
+get_tree_w()
+{
+	i_tree=$(git write-tree)
+	(
+		# the file for --index-output needs to sit next to the
+		# current index file
+		: ${GIT_INDEX_FILE:="$git_dir/index"}
+		TMP_INDEX="$(mktemp "${GIT_INDEX_FILE}-tg.XXXXXX")"
+		git read-tree -m $i_tree --index-output="$TMP_INDEX" &&
+		GIT_INDEX_FILE="$TMP_INDEX" &&
+		export GIT_INDEX_FILE &&
+		git diff --name-only -z HEAD |
+			git update-index -z --add --remove --stdin &&
+		git write-tree &&
+		rm -f "$TMP_INDEX"
+	)
+}
+
+# pretty_tree NAME [-b | -i | -w]
+# Output tree ID of a cleaned-up tree without tg's artifacts.
+# NAME will be ignored for -i and -w, but needs to be present
+pretty_tree()
+{
+	git ls-tree --full-tree "$(get_tree_${2#-} "$1")" |
+		awk -F '	' '$2 !~ /^.top/' |
+		git mktree
+}
+
 # setup_hook NAME
 setup_hook()
 {
-- 
1.7.1.1067.g5aeb7

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