All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Rose via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Rose <83477269+AtariDreams@users.noreply.github.com>,
	Seija Kijin <doremylover123@gmail.com>
Subject: [PATCH v3] curl: resolve deprecated curl declarations
Date: Tue, 17 Jan 2023 20:02:05 +0000	[thread overview]
Message-ID: <pull.1435.v3.git.git.1673985725868.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.1435.v2.git.git.1673984591615.gitgitgadget@gmail.com>

From: Seija Kijin <doremylover123@gmail.com>

Fix CI-Alpine build by replacing deprecated
declarations with their suggested replacements

Note that this required changing the
callbacks of functions because the replacement
for these deprecations require a different function
signature for the callback and different parameters.

Every change done was made as to minimize
changed behavior as well as get the CI to pass again.

Signed-off-by: Seija Kijin <doremylover123@gmail.com>
---
    curl: resolve deprecated curl declarations
    
    Fix CI-Alpine build by replacing deprecated declarations with their
    suggested replacements
    
    Signed-off-by: Seija Kijin doremylover123@gmail.com

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1435%2FAtariDreams%2Fcurl-v3
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1435/AtariDreams/curl-v3
Pull-Request: https://github.com/git/git/pull/1435

Range-diff vs v2:

 1:  c40fb2de13d ! 1:  14ca56fe608 curl: resolve deprecated curl declarations
     @@ Commit message
      
          Signed-off-by: Seija Kijin <doremylover123@gmail.com>
      
     + ## INSTALL ##
     +@@ INSTALL: Issues of note:
     + 	  not need that functionality, use NO_CURL to build without
     + 	  it.
     + 
     +-	  Git requires version "7.19.4" or later of "libcurl" to build
     ++	  Git requires version "7.19.5" or later of "libcurl" to build
     + 	  without NO_CURL. This version requirement may be bumped in
     + 	  the future.
     + 
     +
       ## git-curl-compat.h ##
      @@
       #endif
     @@ http-push.c: static void curl_setup_http(CURL *curl, const char *url,
       	curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
      -	curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
      -	curl_easy_setopt(curl, CURLOPT_IOCTLDATA, buffer);
     -+	curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, ioctl_buffer);
     ++	curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, seek_buffer);
      +	curl_easy_setopt(curl, CURLOPT_SEEKDATA, buffer);
       	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
       	curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
       	curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
      
       ## http.c ##
     +@@ http.c: static const char *http_proxy_ssl_ca_info;
     + static struct credential proxy_cert_auth = CREDENTIAL_INIT;
     + static int proxy_ssl_cert_password_required;
     + 
     ++#ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
     ++static char protocol_list[20];
     ++#endif
     ++
     + static struct {
     + 	const char *name;
     + 	long curlauth_param;
      @@ http.c: size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
       	return size / eltsize;
       }
       
      -curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
     -+int ioctl_buffer(void *userp, curl_off_t offset, int origin)
     ++int seek_buffer(void *userp, curl_off_t offset, int origin)
       {
      -	struct buffer *buffer = clientp;
     -+	struct buffer *buffer = userp;
     - 
     +-
      -	switch (cmd) {
      -	case CURLIOCMD_NOP:
      -		return CURLIOE_OK;
     @@ http.c: size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffe
      -	case CURLIOCMD_RESTARTREAD:
      -		buffer->posn = 0;
      -		return CURLIOE_OK;
     --
     ++	struct buffer *buffer = userp;
     + 
      -	default:
      -		return CURLIOE_UNKNOWNCMD;
     --	}
     -+	buffer->posn = 0;
     ++	if (origin != SEEK_SET)
     ++		BUG("seek_buffer only handles SEEK_SET");
     ++	if (offset < 0 || offset >= buffer->buf.len) {
     ++		error("curl seek would be outside of buffer");
     ++		return CURL_SEEKFUNC_FAIL;
     + 	}
     ++
     ++	buffer->posn = offset;
      +	return CURL_SEEKFUNC_OK;
       }
       
     @@ http.c: void setup_curl_trace(CURL *handle)
       	curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
       }
      +#ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
     -+static void get_curl_allowed_protocols(int from_user, char *protocol)
     ++static void get_curl_allowed_protocols(int from_user)
      +{
      +	unsigned int i = 0;
     -+
     + 
      +	if (is_transport_allowed("http", from_user)) {
     -+		protocol[i++] = 'h';
     -+		protocol[i++] = 't';
     -+		protocol[i++] = 't';
     -+		protocol[i++] = 'p';
     ++		protocol_list[i++] = 'h';
     ++		protocol_list[i++] = 't';
     ++		protocol_list[i++] = 't';
     ++		protocol_list[i++] = 'p';
      +	}
      +
      +	if (is_transport_allowed("https", from_user)) {
      +		if (i != 0) {
     -+			protocol[i++] = ',';
     ++			protocol_list[i++] = ',';
      +		}
      +
     -+		protocol[i++] = 'h';
     -+		protocol[i++] = 't';
     -+		protocol[i++] = 't';
     -+		protocol[i++] = 'p';
     -+		protocol[i++] = 's';
     ++		protocol_list[i++] = 'h';
     ++		protocol_list[i++] = 't';
     ++		protocol_list[i++] = 't';
     ++		protocol_list[i++] = 'p';
     ++		protocol_list[i++] = 's';
      +	}
      +	if (is_transport_allowed("ftp", from_user)) {
      +		if (i != 0) {
     -+			protocol[i++] = ',';
     ++			protocol_list[i++] = ',';
      +		}
     - 
     -+		protocol[i++] = 'f';
     -+		protocol[i++] = 't';
     -+		protocol[i++] = 'p';
     ++
     ++		protocol_list[i++] = 'f';
     ++		protocol_list[i++] = 't';
     ++		protocol_list[i++] = 'p';
      +	}
      +	if (is_transport_allowed("ftps", from_user)) {
      +		if (i != 0) {
     -+			protocol[i++] = ',';
     ++			protocol_list[i++] = ',';
      +		}
      +
     -+		protocol[i++] = 'f';
     -+		protocol[i++] = 't';
     -+		protocol[i++] = 'p';
     -+		protocol[i++] = 's';
     ++		protocol_list[i++] = 'f';
     ++		protocol_list[i++] = 't';
     ++		protocol_list[i++] = 'p';
     ++		protocol_list[i++] = 's';
      +	}
      +
     -+	protocol[i] = '\0';
     ++	protocol_list[i] = '\0';
      +}
      +#else
       static long get_curl_allowed_protocols(int from_user)
     @@ http.c: static long get_curl_allowed_protocols(int from_user)
       
       #ifdef GIT_CURL_HAVE_CURL_HTTP_VERSION_2
       static int get_curl_http_version_opt(const char *version_string, long *opt)
     -@@ http.c: static int get_curl_http_version_opt(const char *version_string, long *opt)
     - static CURL *get_curl_handle(void)
     - {
     - 	CURL *result = curl_easy_init();
     -+#ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
     -+	static char protocol[20], redir_protocol[20];
     -+#endif
     - 
     - 	if (!result)
     - 		die("curl_easy_init failed");
      @@ http.c: static CURL *get_curl_handle(void)
       
       	curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
       	curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
      +#ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
     -+	get_curl_allowed_protocols(0, redir_protocol);
     ++	get_curl_allowed_protocols(0);
      +	curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS_STR, redir_protocol);
     -+	get_curl_allowed_protocols(-1, protocol);
     ++	get_curl_allowed_protocols(-1);
      +	curl_easy_setopt(result, CURLOPT_PROTOCOLS_STR, protocol);
      +#else
       	curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
     @@ http.h: struct buffer {
       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);
      -curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp);
     -+int ioctl_buffer(void *userp, curl_off_t offset, int origin);
     ++int seek_buffer(void *userp, curl_off_t offset, int origin);
       
       /* Slot lifecycle functions */
       struct active_request_slot *get_active_slot(void);
     @@ remote-curl.c: static size_t rpc_out(void *ptr, size_t eltsize,
       }
       
      -static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
     -+static int rpc_ioctl(void *userp, curl_off_t offset, int origin)
     ++static int rpc_seek(void *userp, curl_off_t offset, int origin)
       {
      -	struct rpc_state *rpc = clientp;
      +	struct rpc_state *rpc = userp;
     @@ remote-curl.c: static size_t rpc_out(void *ptr, size_t eltsize,
      -	switch (cmd) {
      -	case CURLIOCMD_NOP:
      -		return CURLIOE_OK;
     --
     ++	if (origin != SEEK_SET)
     ++		BUG("rpc_seek only handles SEEK_SET, not %d", origin);
     + 
      -	case CURLIOCMD_RESTARTREAD:
      -		if (rpc->initial_buffer) {
      -			rpc->pos = 0;
      -			return CURLIOE_OK;
     --		}
     ++	if (rpc->initial_buffer) {
     ++		if (offset < 0 || offset > rpc->len) {
     ++			error("curl seek would be outside of rpc buffer");
     ++			return CURL_SEEKFUNC_FAIL;
     + 		}
      -		error(_("unable to rewind rpc post data - try increasing http.postBuffer"));
      -		return CURLIOE_FAILRESTART;
      -
      -	default:
      -		return CURLIOE_UNKNOWNCMD;
     -+	if (rpc->initial_buffer) {
     -+		rpc->pos = 0;
     ++		rpc->pos = offset;
      +		return CURL_SEEKFUNC_OK;
       	}
      +
     @@ remote-curl.c: retry:
       		curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
      -		curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
      -		curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
     -+		curl_easy_setopt(slot->curl, CURLOPT_SEEKFUNCTION, rpc_ioctl);
     ++		curl_easy_setopt(slot->curl, CURLOPT_SEEKFUNCTION, rpc_seek);
      +		curl_easy_setopt(slot->curl, CURLOPT_SEEKDATA, rpc);
       		if (options.verbosity > 1) {
       			fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);


 INSTALL           |  2 +-
 git-curl-compat.h |  8 +++++
 http-push.c       |  6 ++--
 http.c            | 80 ++++++++++++++++++++++++++++++++++++++++-------
 http.h            |  2 +-
 remote-curl.c     | 31 +++++++++---------
 6 files changed, 96 insertions(+), 33 deletions(-)

diff --git a/INSTALL b/INSTALL
index 33447883974..d5694f8c470 100644
--- a/INSTALL
+++ b/INSTALL
@@ -139,7 +139,7 @@ Issues of note:
 	  not need that functionality, use NO_CURL to build without
 	  it.
 
-	  Git requires version "7.19.4" or later of "libcurl" to build
+	  Git requires version "7.19.5" or later of "libcurl" to build
 	  without NO_CURL. This version requirement may be bumped in
 	  the future.
 
diff --git a/git-curl-compat.h b/git-curl-compat.h
index 56a83b6bbd8..38a2237c8fe 100644
--- a/git-curl-compat.h
+++ b/git-curl-compat.h
@@ -127,3 +127,11 @@
 #endif
 
 #endif
+
+/**
+ * CURLOPT_PROTOCOLS_STR was added in 7.83.0, released in August
+ * 2022.
+ */
+#if LIBCURL_VERSION_NUM >= 0x075500
+#define GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR 1
+#endif
diff --git a/http-push.c b/http-push.c
index 5f4340a36e6..7f71316456c 100644
--- a/http-push.c
+++ b/http-push.c
@@ -198,13 +198,13 @@ static void curl_setup_http(CURL *curl, const char *url,
 		const char *custom_req, struct buffer *buffer,
 		curl_write_callback write_fn)
 {
-	curl_easy_setopt(curl, CURLOPT_PUT, 1);
+	curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
 	curl_easy_setopt(curl, CURLOPT_URL, url);
 	curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
 	curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
 	curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
-	curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
-	curl_easy_setopt(curl, CURLOPT_IOCTLDATA, buffer);
+	curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, seek_buffer);
+	curl_easy_setopt(curl, CURLOPT_SEEKDATA, buffer);
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
 	curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
 	curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
diff --git a/http.c b/http.c
index 8a5ba3f4776..671bfd834f3 100644
--- a/http.c
+++ b/http.c
@@ -76,6 +76,10 @@ static const char *http_proxy_ssl_ca_info;
 static struct credential proxy_cert_auth = CREDENTIAL_INIT;
 static int proxy_ssl_cert_password_required;
 
+#ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
+static char protocol_list[20];
+#endif
+
 static struct {
 	const char *name;
 	long curlauth_param;
@@ -157,21 +161,19 @@ size_t fread_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
 	return size / eltsize;
 }
 
-curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp)
+int seek_buffer(void *userp, curl_off_t offset, int origin)
 {
-	struct buffer *buffer = clientp;
-
-	switch (cmd) {
-	case CURLIOCMD_NOP:
-		return CURLIOE_OK;
-
-	case CURLIOCMD_RESTARTREAD:
-		buffer->posn = 0;
-		return CURLIOE_OK;
+	struct buffer *buffer = userp;
 
-	default:
-		return CURLIOE_UNKNOWNCMD;
+	if (origin != SEEK_SET)
+		BUG("seek_buffer only handles SEEK_SET");
+	if (offset < 0 || offset >= buffer->buf.len) {
+		error("curl seek would be outside of buffer");
+		return CURL_SEEKFUNC_FAIL;
 	}
+
+	buffer->posn = offset;
+	return CURL_SEEKFUNC_OK;
 }
 
 size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
@@ -765,7 +767,52 @@ void setup_curl_trace(CURL *handle)
 	curl_easy_setopt(handle, CURLOPT_DEBUGFUNCTION, curl_trace);
 	curl_easy_setopt(handle, CURLOPT_DEBUGDATA, NULL);
 }
+#ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
+static void get_curl_allowed_protocols(int from_user)
+{
+	unsigned int i = 0;
 
+	if (is_transport_allowed("http", from_user)) {
+		protocol_list[i++] = 'h';
+		protocol_list[i++] = 't';
+		protocol_list[i++] = 't';
+		protocol_list[i++] = 'p';
+	}
+
+	if (is_transport_allowed("https", from_user)) {
+		if (i != 0) {
+			protocol_list[i++] = ',';
+		}
+
+		protocol_list[i++] = 'h';
+		protocol_list[i++] = 't';
+		protocol_list[i++] = 't';
+		protocol_list[i++] = 'p';
+		protocol_list[i++] = 's';
+	}
+	if (is_transport_allowed("ftp", from_user)) {
+		if (i != 0) {
+			protocol_list[i++] = ',';
+		}
+
+		protocol_list[i++] = 'f';
+		protocol_list[i++] = 't';
+		protocol_list[i++] = 'p';
+	}
+	if (is_transport_allowed("ftps", from_user)) {
+		if (i != 0) {
+			protocol_list[i++] = ',';
+		}
+
+		protocol_list[i++] = 'f';
+		protocol_list[i++] = 't';
+		protocol_list[i++] = 'p';
+		protocol_list[i++] = 's';
+	}
+
+	protocol_list[i] = '\0';
+}
+#else
 static long get_curl_allowed_protocols(int from_user)
 {
 	long allowed_protocols = 0;
@@ -781,6 +828,7 @@ static long get_curl_allowed_protocols(int from_user)
 
 	return allowed_protocols;
 }
+#endif
 
 #ifdef GIT_CURL_HAVE_CURL_HTTP_VERSION_2
 static int get_curl_http_version_opt(const char *version_string, long *opt)
@@ -923,10 +971,18 @@ static CURL *get_curl_handle(void)
 
 	curl_easy_setopt(result, CURLOPT_MAXREDIRS, 20);
 	curl_easy_setopt(result, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
+#ifdef GIT_CURL_HAVE_CURLOPT_PROTOCOLS_STR
+	get_curl_allowed_protocols(0);
+	curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS_STR, redir_protocol);
+	get_curl_allowed_protocols(-1);
+	curl_easy_setopt(result, CURLOPT_PROTOCOLS_STR, protocol);
+#else
 	curl_easy_setopt(result, CURLOPT_REDIR_PROTOCOLS,
 			 get_curl_allowed_protocols(0));
 	curl_easy_setopt(result, CURLOPT_PROTOCOLS,
 			 get_curl_allowed_protocols(-1));
+#endif
+
 	if (getenv("GIT_CURL_VERBOSE"))
 		http_trace_curl_no_data();
 	setup_curl_trace(result);
diff --git a/http.h b/http.h
index 3c94c479100..0be9400ef53 100644
--- a/http.h
+++ b/http.h
@@ -40,7 +40,7 @@ struct buffer {
 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);
-curlioerr ioctl_buffer(CURL *handle, int cmd, void *clientp);
+int seek_buffer(void *userp, curl_off_t offset, int origin);
 
 /* Slot lifecycle functions */
 struct active_request_slot *get_active_slot(void);
diff --git a/remote-curl.c b/remote-curl.c
index 72dfb8fb86a..540da2b7989 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -717,25 +717,24 @@ static size_t rpc_out(void *ptr, size_t eltsize,
 	return avail;
 }
 
-static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
+static int rpc_seek(void *userp, curl_off_t offset, int origin)
 {
-	struct rpc_state *rpc = clientp;
+	struct rpc_state *rpc = userp;
 
-	switch (cmd) {
-	case CURLIOCMD_NOP:
-		return CURLIOE_OK;
+	if (origin != SEEK_SET)
+		BUG("rpc_seek only handles SEEK_SET, not %d", origin);
 
-	case CURLIOCMD_RESTARTREAD:
-		if (rpc->initial_buffer) {
-			rpc->pos = 0;
-			return CURLIOE_OK;
+	if (rpc->initial_buffer) {
+		if (offset < 0 || offset > rpc->len) {
+			error("curl seek would be outside of rpc buffer");
+			return CURL_SEEKFUNC_FAIL;
 		}
-		error(_("unable to rewind rpc post data - try increasing http.postBuffer"));
-		return CURLIOE_FAILRESTART;
-
-	default:
-		return CURLIOE_UNKNOWNCMD;
+		rpc->pos = offset;
+		return CURL_SEEKFUNC_OK;
 	}
+
+	error(_("unable to rewind rpc post data - try increasing http.postBuffer"));
+	return CURL_SEEKFUNC_FAIL;
 }
 
 struct check_pktline_state {
@@ -959,8 +958,8 @@ retry:
 		rpc->initial_buffer = 1;
 		curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
 		curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
-		curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
-		curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
+		curl_easy_setopt(slot->curl, CURLOPT_SEEKFUNCTION, rpc_seek);
+		curl_easy_setopt(slot->curl, CURLOPT_SEEKDATA, rpc);
 		if (options.verbosity > 1) {
 			fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
 			fflush(stderr);

base-commit: a7caae2729742fc80147bca1c02ae848cb55921a
-- 
gitgitgadget

  reply	other threads:[~2023-01-17 21:39 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-17 19:27 [PATCH] curl: resolve deprecated curl declarations Rose via GitGitGadget
2023-01-17 19:43 ` [PATCH v2] " Rose via GitGitGadget
2023-01-17 20:02   ` Rose via GitGitGadget [this message]
2023-01-17 20:09     ` [PATCH v4] " Rose via GitGitGadget
2023-01-17 20:19       ` [PATCH v5] " Rose via GitGitGadget
2023-01-17 20:22         ` [PATCH v6] " Rose via GitGitGadget
2023-01-17 20:33           ` [PATCH v7] " Rose via GitGitGadget
2023-01-17 21:41             ` [PATCH v8] " Rose via GitGitGadget
2023-01-18  7:30               ` Junio C Hamano

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=pull.1435.v3.git.git.1673985725868.gitgitgadget@gmail.com \
    --to=gitgitgadget@gmail.com \
    --cc=83477269+AtariDreams@users.noreply.github.com \
    --cc=doremylover123@gmail.com \
    --cc=git@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.