merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 24 insertions, 2 deletions

diff --git a/third_party/git/wt-status.h b/third_party/git/wt-status.h
index 77dad5b92048..35b44c388edf 100644
--- a/third_party/git/wt-status.h
+++ b/third_party/git/wt-status.h
@@ -38,9 +38,22 @@ enum show_ignored_type {
 enum commit_whence {
 	FROM_COMMIT,     /* normal */
 	FROM_MERGE,      /* commit came from merge */
-	FROM_CHERRY_PICK /* commit came from cherry-pick */
+	FROM_CHERRY_PICK_SINGLE, /* commit came from cherry-pick */
+	FROM_CHERRY_PICK_MULTI, /* commit came from a sequence of cherry-picks */
+	FROM_REBASE_PICK /* commit came from a pick/reword/edit */
 };
 
+static inline int is_from_cherry_pick(enum commit_whence whence)
+{
+	return whence == FROM_CHERRY_PICK_SINGLE ||
+		whence == FROM_CHERRY_PICK_MULTI;
+}
+
+static inline int is_from_rebase(enum commit_whence whence)
+{
+	return whence == FROM_REBASE_PICK;
+}
+
 struct wt_status_change_data {
 	int worktree_status;
 	int index_status;
@@ -66,6 +79,7 @@ enum wt_status_format {
 
 #define HEAD_DETACHED_AT _("HEAD detached at ")
 #define HEAD_DETACHED_FROM _("HEAD detached from ")
+#define SPARSE_CHECKOUT_DISABLED -1
 
 struct wt_status_state {
 	int merge_in_progress;
@@ -77,6 +91,7 @@ struct wt_status_state {
 	int bisect_in_progress;
 	int revert_in_progress;
 	int detached_at;
+	int sparse_checkout_percentage; /* SPARSE_CHECKOUT_DISABLED if not sparse */
 	char *branch;
 	char *onto;
 	char *detached_from;
@@ -116,7 +131,7 @@ struct wt_status {
 	int rename_limit;
 	enum wt_status_format status_format;
 	struct wt_status_state state;
-	unsigned char sha1_commit[GIT_MAX_RAWSZ]; /* when not Initial */
+	struct object_id oid_commit; /* when not Initial */
 
 	/* These are computed during processing of the individual sections */
 	int committable;
@@ -136,7 +151,14 @@ void wt_status_add_cut_line(FILE *fp);
 void wt_status_prepare(struct repository *r, struct wt_status *s);
 void wt_status_print(struct wt_status *s);
 void wt_status_collect(struct wt_status *s);
+/*
+ * Frees the buffers allocated by wt_status_collect.
+ */
 void wt_status_collect_free_buffers(struct wt_status *s);
+/*
+ * Frees the buffers of the wt_status_state.
+ */
+void wt_status_state_free_buffers(struct wt_status_state *s);
 void wt_status_get_state(struct repository *repo,
 			 struct wt_status_state *state,
 			 int get_detached_from);