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, 45 insertions, 2 deletions

diff --git a/third_party/git/pathspec.c b/third_party/git/pathspec.c
index 12c2b322b3..7a229d8d22 100644
--- a/third_party/git/pathspec.c
+++ b/third_party/git/pathspec.c
@@ -3,6 +3,8 @@
 #include "dir.h"
 #include "pathspec.h"
 #include "attr.h"
+#include "strvec.h"
+#include "quote.h"
 
 /*
  * Finds which of the given pathspecs match items in the index.
@@ -436,8 +438,13 @@ static void init_pathspec_item(struct pathspec_item *item, unsigned flags,
 	} else {
 		match = prefix_path_gently(prefix, prefixlen,
 					   &prefixlen, copyfrom);
-		if (!match)
-			die(_("%s: '%s' is outside repository"), elt, copyfrom);
+		if (!match) {
+			const char *hint_path = get_git_work_tree();
+			if (!hint_path)
+				hint_path = get_git_dir();
+			die(_("%s: '%s' is outside repository at '%s'"), elt,
+			    copyfrom, absolute_path(hint_path));
+		}
 	}
 
 	item->match = match;
@@ -613,6 +620,42 @@ void parse_pathspec(struct pathspec *pathspec,
 	}
 }
 
+void parse_pathspec_file(struct pathspec *pathspec, unsigned magic_mask,
+			 unsigned flags, const char *prefix,
+			 const char *file, int nul_term_line)
+{
+	struct strvec parsed_file = STRVEC_INIT;
+	strbuf_getline_fn getline_fn = nul_term_line ? strbuf_getline_nul :
+						       strbuf_getline;
+	struct strbuf buf = STRBUF_INIT;
+	struct strbuf unquoted = STRBUF_INIT;
+	FILE *in;
+
+	if (!strcmp(file, "-"))
+		in = stdin;
+	else
+		in = xfopen(file, "r");
+
+	while (getline_fn(&buf, in) != EOF) {
+		if (!nul_term_line && buf.buf[0] == '"') {
+			strbuf_reset(&unquoted);
+			if (unquote_c_style(&unquoted, buf.buf, NULL))
+				die(_("line is badly quoted: %s"), buf.buf);
+			strbuf_swap(&buf, &unquoted);
+		}
+		strvec_push(&parsed_file, buf.buf);
+		strbuf_reset(&buf);
+	}
+
+	strbuf_release(&unquoted);
+	strbuf_release(&buf);
+	if (in != stdin)
+		fclose(in);
+
+	parse_pathspec(pathspec, magic_mask, flags, prefix, parsed_file.v);
+	strvec_clear(&parsed_file);
+}
+
 void copy_pathspec(struct pathspec *dst, const struct pathspec *src)
 {
 	int i, j;