t/t2021-checkout-last: "checkout -" should work after a rebase finishes

diff --git a/http.c b/http.c
index d9d1aad3be468394e39966c0b45e7e101b387b0c..92aba59082a4ed9aa0c92d8522793abcd332e279 100644 (file)
--- a/http.c
+++ b/http.c
@@ -5,6 +5,7 @@
 #include "url.h"
 #include "credential.h"
 #include "version.h"
+#include "pkt-line.h"
 
 int active_requests;
 int http_is_verbose;
@@ -30,6 +31,7 @@ static CURL *curl_default;
 char curl_errorstr[CURL_ERROR_SIZE];
 
 static int curl_ssl_verify = -1;
+static int curl_ssl_try;
 static const char *ssl_cert;
 #if LIBCURL_VERSION_NUM >= 0x070903
 static const char *ssl_key;
@@ -162,6 +164,10 @@ static int http_options(const char *var, const char *value, void *cb)
                        ssl_cert_password_required = 1;
                return 0;
        }
+       if (!strcmp("http.ssltry", var)) {
+               curl_ssl_try = git_config_bool(var, value);
+               return 0;
+       }
        if (!strcmp("http.minsessions", var)) {
                min_curl_sessions = git_config_int(var, value);
 #ifndef USE_CURL_MULTI
@@ -281,7 +287,6 @@ static CURL *get_curl_handle(void)
 #endif
        if (ssl_cainfo != NULL)
                curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
-       curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
 
        if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
                curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
@@ -306,6 +311,11 @@ static CURL *get_curl_handle(void)
        if (curl_ftp_no_epsv)
                curl_easy_setopt(result, CURLOPT_FTP_USE_EPSV, 0);
 
+#ifdef CURLOPT_USE_SSL
+       if (curl_ssl_try)
+               curl_easy_setopt(result, CURLOPT_USE_SSL, CURLUSESSL_TRY);
+#endif
+
        if (curl_http_proxy) {
                curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
                curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
@@ -505,6 +515,7 @@ struct active_request_slot *get_active_slot(void)
        curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, NULL);
        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
+       curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
        if (http_auth.password)
                init_curl_http_auth(slot->curl);
 
@@ -760,6 +771,25 @@ char *get_remote_object_url(const char *url, const char *hex,
 
 int handle_curl_result(struct slot_results *results)
 {
+       /*
+        * If we see a failing http code with CURLE_OK, we have turned off
+        * FAILONERROR (to keep the server's custom error response), and should
+        * translate the code into failure here.
+        */
+       if (results->curl_result == CURLE_OK &&
+           results->http_code >= 400) {
+               results->curl_result = CURLE_HTTP_RETURNED_ERROR;
+               /*
+                * Normally curl will already have put the "reason phrase"
+                * from the server into curl_errorstr; unfortunately without
+                * FAILONERROR it is lost, so we can give only the numeric
+                * status code.
+                */
+               snprintf(curl_errorstr, sizeof(curl_errorstr),
+                        "The requested URL returned error: %ld",
+                        results->http_code);
+       }
+
        if (results->curl_result == CURLE_OK) {
                credential_approve(&http_auth);
                return HTTP_OK;
@@ -824,6 +854,8 @@ static int http_request(const char *url, struct strbuf *type,
        strbuf_addstr(&buf, "Pragma:");
        if (options & HTTP_NO_CACHE)
                strbuf_addstr(&buf, " no-cache");
+       if (options & HTTP_KEEP_ERROR)
+               curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 0);
 
        headers = curl_slist_append(headers, buf.buf);
 
@@ -835,7 +867,8 @@ static int http_request(const char *url, struct strbuf *type,
                run_active_slot(slot);
                ret = handle_curl_result(&results);
        } else {
-               error("Unable to start HTTP request for %s", url);
+               snprintf(curl_errorstr, sizeof(curl_errorstr),
+                        "failed to start HTTP request");
                ret = HTTP_START_FAILED;
        }
 
@@ -861,6 +894,22 @@ static int http_request_reauth(const char *url,
        int ret = http_request(url, type, result, target, options);
        if (ret != HTTP_REAUTH)
                return ret;
+
+       /*
+        * If we are using KEEP_ERROR, the previous request may have
+        * put cruft into our output stream; we should clear it out before
+        * making our next request. We only know how to do this for
+        * the strbuf case, but that is enough to satisfy current callers.
+        */
+       if (options & HTTP_KEEP_ERROR) {
+               switch (target) {
+               case HTTP_REQUEST_STRBUF:
+                       strbuf_reset(result);
+                       break;
+               default:
+                       die("BUG: HTTP_KEEP_ERROR is only supported with strbufs");
+               }
+       }
        return http_request(url, type, result, target, options);
 }
 
@@ -902,15 +951,6 @@ static int http_get_file(const char *url, const char *filename, int options)
        return ret;
 }
 
-int http_error(const char *url, int ret)
-{
-       /* http_request has already handled HTTP_START_FAILED. */
-       if (ret != HTTP_START_FAILED)
-               error("%s while accessing %s", curl_errorstr, url);
-
-       return ret;
-}
-
 int http_fetch_ref(const char *base, struct ref *ref)
 {
        char *url;