merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 253 insertions, 0 deletions

diff --git a/third_party/git/http.h b/third_party/git/http.h
new file mode 100644
index 000000000000..b429f1cf042b
--- /dev/null
+++ b/third_party/git/http.h
@@ -0,0 +1,253 @@
+#ifndef HTTP_H
+#define HTTP_H
+
+#include "cache.h"
+
+#include <curl/curl.h>
+#include <curl/easy.h>
+
+#include "strbuf.h"
+#include "remote.h"
+#include "url.h"
+
+/*
+ * We detect based on the cURL version if multi-transfer is
+ * usable in this implementation and define this symbol accordingly.
+ * This shouldn't be set by the Makefile or by the user (e.g. via CFLAGS).
+ */
+#undef USE_CURL_MULTI
+
+#if LIBCURL_VERSION_NUM >= 0x071000
+#define USE_CURL_MULTI
+#define DEFAULT_MAX_REQUESTS 5
+#endif
+
+#if LIBCURL_VERSION_NUM < 0x070704
+#define curl_global_cleanup() do { /* nothing */ } while (0)
+#endif
+#if LIBCURL_VERSION_NUM < 0x070800
+#define curl_global_init(a) do { /* nothing */ } while (0)
+#endif
+
+#if (LIBCURL_VERSION_NUM < 0x070c04) || (LIBCURL_VERSION_NUM == 0x071000)
+#define NO_CURL_EASY_DUPHANDLE
+#endif
+
+#if LIBCURL_VERSION_NUM < 0x070a03
+#define CURLE_HTTP_RETURNED_ERROR CURLE_HTTP_NOT_FOUND
+#endif
+
+#if LIBCURL_VERSION_NUM < 0x070c03
+#define NO_CURL_IOCTL
+#endif
+
+/*
+ * CURLOPT_USE_SSL was known as CURLOPT_FTP_SSL up to 7.16.4,
+ * and the constants were known as CURLFTPSSL_*
+*/
+#if !defined(CURLOPT_USE_SSL) && defined(CURLOPT_FTP_SSL)
+#define CURLOPT_USE_SSL CURLOPT_FTP_SSL
+#define CURLUSESSL_TRY CURLFTPSSL_TRY
+#endif
+
+struct slot_results {
+	CURLcode curl_result;
+	long http_code;
+	long auth_avail;
+	long http_connectcode;
+};
+
+struct active_request_slot {
+	CURL *curl;
+	int in_use;
+	CURLcode curl_result;
+	long http_code;
+	int *finished;
+	struct slot_results *results;
+	void *callback_data;
+	void (*callback_func)(void *data);
+	struct active_request_slot *next;
+};
+
+struct buffer {
+	struct strbuf buf;
+	size_t posn;
+};
+
+/* Curl request read/write callbacks */
+size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
+size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
+size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf);
+#ifndef NO_CURL_IOCTL
+curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp);
+#endif
+
+/* Slot lifecycle functions */
+struct active_request_slot *get_active_slot(void);
+int start_active_slot(struct active_request_slot *slot);
+void run_active_slot(struct active_request_slot *slot);
+void finish_all_active_slots(void);
+
+/*
+ * This will run one slot to completion in a blocking manner, similar to how
+ * curl_easy_perform would work (but we don't want to use that, because
+ * we do not want to intermingle calls to curl_multi and curl_easy).
+ *
+ */
+int run_one_slot(struct active_request_slot *slot,
+		 struct slot_results *results);
+
+#ifdef USE_CURL_MULTI
+void fill_active_slots(void);
+void add_fill_function(void *data, int (*fill)(void *));
+void step_active_slots(void);
+#endif
+
+void http_init(struct remote *remote, const char *url,
+	       int proactive_auth);
+void http_cleanup(void);
+struct curl_slist *http_copy_default_headers(void);
+
+extern long int git_curl_ipresolve;
+extern int active_requests;
+extern int http_is_verbose;
+extern ssize_t http_post_buffer;
+extern struct credential http_auth;
+
+extern char curl_errorstr[CURL_ERROR_SIZE];
+
+enum http_follow_config {
+	HTTP_FOLLOW_NONE,
+	HTTP_FOLLOW_ALWAYS,
+	HTTP_FOLLOW_INITIAL
+};
+extern enum http_follow_config http_follow_config;
+
+static inline int missing__target(int code, int result)
+{
+	return	/* file:// URL -- do we ever use one??? */
+		(result == CURLE_FILE_COULDNT_READ_FILE) ||
+		/* http:// and https:// URL */
+		(code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
+		/* ftp:// URL */
+		(code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
+		;
+}
+
+#define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
+
+/*
+ * Normalize curl results to handle CURL_FAILONERROR (or lack thereof). Failing
+ * http codes have their "result" converted to CURLE_HTTP_RETURNED_ERROR, and
+ * an appropriate string placed in the errorstr buffer (pass curl_errorstr if
+ * you don't have a custom buffer).
+ */
+void normalize_curl_result(CURLcode *result, long http_code, char *errorstr,
+			   size_t errorlen);
+
+/* Helpers for modifying and creating URLs */
+void append_remote_object_url(struct strbuf *buf, const char *url,
+			      const char *hex,
+			      int only_two_digit_prefix);
+char *get_remote_object_url(const char *url, const char *hex,
+			    int only_two_digit_prefix);
+
+/* Options for http_get_*() */
+struct http_get_options {
+	unsigned no_cache:1,
+		 initial_request:1;
+
+	/* If non-NULL, returns the content-type of the response. */
+	struct strbuf *content_type;
+
+	/*
+	 * If non-NULL, and content_type above is non-NULL, returns
+	 * the charset parameter from the content-type. If none is
+	 * present, returns an empty string.
+	 */
+	struct strbuf *charset;
+
+	/*
+	 * If non-NULL, returns the URL we ended up at, including any
+	 * redirects we followed.
+	 */
+	struct strbuf *effective_url;
+
+	/*
+	 * If both base_url and effective_url are non-NULL, the base URL will
+	 * be munged to reflect any redirections going from the requested url
+	 * to effective_url. See the definition of update_url_from_redirect
+	 * for details.
+	 */
+	struct strbuf *base_url;
+
+	/*
+	 * If not NULL, contains additional HTTP headers to be sent with the
+	 * request. The strings in the list must not be freed until after the
+	 * request has completed.
+	 */
+	struct string_list *extra_headers;
+};
+
+/* Return values for http_get_*() */
+#define HTTP_OK			0
+#define HTTP_MISSING_TARGET	1
+#define HTTP_ERROR		2
+#define HTTP_START_FAILED	3
+#define HTTP_REAUTH	4
+#define HTTP_NOAUTH	5
+
+/*
+ * Requests a URL and stores the result in a strbuf.
+ *
+ * If the result pointer is NULL, a HTTP HEAD request is made instead of GET.
+ */
+int http_get_strbuf(const char *url, struct strbuf *result, struct http_get_options *options);
+
+int http_fetch_ref(const char *base, struct ref *ref);
+
+/* Helpers for fetching packs */
+int http_get_info_packs(const char *base_url,
+			struct packed_git **packs_head);
+
+struct http_pack_request {
+	char *url;
+	struct packed_git *target;
+	struct packed_git **lst;
+	FILE *packfile;
+	struct strbuf tmpfile;
+	struct active_request_slot *slot;
+};
+
+struct http_pack_request *new_http_pack_request(
+	struct packed_git *target, const char *base_url);
+int finish_http_pack_request(struct http_pack_request *preq);
+void release_http_pack_request(struct http_pack_request *preq);
+
+/* Helpers for fetching object */
+struct http_object_request {
+	char *url;
+	struct strbuf tmpfile;
+	int localfile;
+	CURLcode curl_result;
+	char errorstr[CURL_ERROR_SIZE];
+	long http_code;
+	struct object_id oid;
+	struct object_id real_oid;
+	git_hash_ctx c;
+	git_zstream stream;
+	int zret;
+	int rename;
+	struct active_request_slot *slot;
+};
+
+struct http_object_request *new_http_object_request(
+	const char *base_url, const struct object_id *oid);
+void process_http_object_request(struct http_object_request *freq);
+int finish_http_object_request(struct http_object_request *freq);
+void abort_http_object_request(struct http_object_request *freq);
+void release_http_object_request(struct http_object_request *freq);
+
+/* setup routine for curl_easy_setopt CURLOPT_DEBUGFUNCTION */
+void setup_curl_trace(CURL *handle);
+#endif /* HTTP_H */