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, 63 insertions, 8 deletions

diff --git a/third_party/git/strbuf.c b/third_party/git/strbuf.c
index d30f916858..e3397cc4c7 100644
--- a/third_party/git/strbuf.c
+++ b/third_party/git/strbuf.c
@@ -479,6 +479,23 @@ void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
 	}
 }
 
+#define URL_UNSAFE_CHARS " <>\"%{}|\\^`:?#[]@!$&'()*+,;="
+
+void strbuf_add_percentencode(struct strbuf *dst, const char *src, int flags)
+{
+	size_t i, len = strlen(src);
+
+	for (i = 0; i < len; i++) {
+		unsigned char ch = src[i];
+		if (ch <= 0x1F || ch >= 0x7F ||
+		    (ch == '/' && (flags & STRBUF_ENCODE_SLASH)) ||
+		    strchr(URL_UNSAFE_CHARS, ch))
+			strbuf_addf(dst, "%%%02X", (unsigned char)ch);
+		else
+			strbuf_addch(dst, ch);
+	}
+}
+
 size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
 {
 	size_t res;
@@ -539,7 +556,6 @@ ssize_t strbuf_write(struct strbuf *sb, FILE *f)
 	return sb->len ? fwrite(sb->buf, 1, sb->len, f) : 0;
 }
 
-
 #define STRBUF_MAXLINK (2*PATH_MAX)
 
 int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
@@ -675,6 +691,16 @@ int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
 }
 #endif
 
+int strbuf_appendwholeline(struct strbuf *sb, FILE *fp, int term)
+{
+	struct strbuf line = STRBUF_INIT;
+	if (strbuf_getwholeline(&line, fp, term))
+		return EOF;
+	strbuf_addbuf(sb, &line);
+	strbuf_release(&line);
+	return 0;
+}
+
 static int strbuf_getdelim(struct strbuf *sb, FILE *fp, int term)
 {
 	if (strbuf_getwholeline(sb, fp, term))
@@ -774,8 +800,10 @@ void strbuf_addstr_xml_quoted(struct strbuf *buf, const char *s)
 	}
 }
 
-static int is_rfc3986_reserved(char ch)
+int is_rfc3986_reserved_or_unreserved(char ch)
 {
+	if (is_rfc3986_unreserved(ch))
+		return 1;
 	switch (ch) {
 		case '!': case '*': case '\'': case '(': case ')': case ';':
 		case ':': case '@': case '&': case '=': case '+': case '$':
@@ -785,20 +813,19 @@ static int is_rfc3986_reserved(char ch)
 	return 0;
 }
 
-static int is_rfc3986_unreserved(char ch)
+int is_rfc3986_unreserved(char ch)
 {
 	return isalnum(ch) ||
 		ch == '-' || ch == '_' || ch == '.' || ch == '~';
 }
 
 static void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len,
-				 int reserved)
+				 char_predicate allow_unencoded_fn)
 {
 	strbuf_grow(sb, len);
 	while (len--) {
 		char ch = *s++;
-		if (is_rfc3986_unreserved(ch) ||
-		    (!reserved && is_rfc3986_reserved(ch)))
+		if (allow_unencoded_fn(ch))
 			strbuf_addch(sb, ch);
 		else
 			strbuf_addf(sb, "%%%02x", (unsigned char)ch);
@@ -806,9 +833,9 @@ static void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len,
 }
 
 void strbuf_addstr_urlencode(struct strbuf *sb, const char *s,
-			     int reserved)
+			     char_predicate allow_unencoded_fn)
 {
-	strbuf_add_urlencode(sb, s, strlen(s), reserved);
+	strbuf_add_urlencode(sb, s, strlen(s), allow_unencoded_fn);
 }
 
 static void strbuf_humanise(struct strbuf *buf, off_t bytes,
@@ -1124,3 +1151,31 @@ int strbuf_normalize_path(struct strbuf *src)
 	strbuf_release(&dst);
 	return 0;
 }
+
+int strbuf_edit_interactively(struct strbuf *buffer, const char *path,
+			      const char *const *env)
+{
+	char *path2 = NULL;
+	int fd, res = 0;
+
+	if (!is_absolute_path(path))
+		path = path2 = xstrdup(git_path("%s", path));
+
+	fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+	if (fd < 0)
+		res = error_errno(_("could not open '%s' for writing"), path);
+	else if (write_in_full(fd, buffer->buf, buffer->len) < 0) {
+		res = error_errno(_("could not write to '%s'"), path);
+		close(fd);
+	} else if (close(fd) < 0)
+		res = error_errno(_("could not close '%s'"), path);
+	else {
+		strbuf_reset(buffer);
+		if (launch_editor(path, buffer, env) < 0)
+			res = error_errno(_("could not edit '%s'"), path);
+		unlink(path);
+	}
+
+	free(path2);
+	return res;
+}