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From: "Rohit Ashiwal via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>,
	Rohit Ashiwal <rohit.ashiwal265@gmail.com>
Subject: [PATCH 1/2] archive: replace write_or_die() calls with write_block_or_die()
Date: Fri, 12 Apr 2019 16:04:39 -0700 (PDT)	[thread overview]
Message-ID: <7a9525a78a7b7b237150b9264cf675a4a0b37267.1555110278.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.145.git.gitgitgadget@gmail.com>

From: Rohit Ashiwal <rohit.ashiwal265@gmail.com>

MinGit for Windows comes without `gzip` bundled inside, git-archive uses
`gzip -cn` to compress tar files but for this to work, gzip needs to be
present on the host system.

In the next commit, we will change the gzip compression so that we no
longer spawn `gzip` but let zlib perform the compression in the same
process instead.

In preparation for this, we consolidate all the block writes into a
single function.

This closes https://github.com/git-for-windows/git/issues/1970

Signed-off-by: Rohit Ashiwal <rohit.ashiwal265@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 archive-tar.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/archive-tar.c b/archive-tar.c
index 4aabd566fb..ba37dad27c 100644
--- a/archive-tar.c
+++ b/archive-tar.c
@@ -17,6 +17,8 @@ static unsigned long offset;
 
 static int tar_umask = 002;
 
+static gzFile gzip;
+
 static int write_tar_filter_archive(const struct archiver *ar,
 				    struct archiver_args *args);
 
@@ -38,11 +40,21 @@ static int write_tar_filter_archive(const struct archiver *ar,
 #define USTAR_MAX_MTIME 077777777777ULL
 #endif
 
+/* writes out the whole block, or dies if fails */
+static void write_block_or_die(const char *block) {
+	if (gzip) {
+		if (gzwrite(gzip, block, (unsigned) BLOCKSIZE) != BLOCKSIZE)
+			die(_("gzwrite failed"));
+	} else {
+		write_or_die(1, block, BLOCKSIZE);
+	}
+}
+
 /* writes out the whole block, but only if it is full */
 static void write_if_needed(void)
 {
 	if (offset == BLOCKSIZE) {
-		write_or_die(1, block, BLOCKSIZE);
+		write_block_or_die(block);
 		offset = 0;
 	}
 }
@@ -66,7 +78,7 @@ static void do_write_blocked(const void *data, unsigned long size)
 		write_if_needed();
 	}
 	while (size >= BLOCKSIZE) {
-		write_or_die(1, buf, BLOCKSIZE);
+		write_block_or_die(buf);
 		size -= BLOCKSIZE;
 		buf += BLOCKSIZE;
 	}
@@ -101,10 +113,10 @@ static void write_trailer(void)
 {
 	int tail = BLOCKSIZE - offset;
 	memset(block + offset, 0, tail);
-	write_or_die(1, block, BLOCKSIZE);
+	write_block_or_die(block);
 	if (tail < 2 * RECORDSIZE) {
 		memset(block, 0, offset);
-		write_or_die(1, block, BLOCKSIZE);
+		write_block_or_die(block);
 	}
 }
 
-- 
gitgitgadget


  reply	other threads:[~2019-04-12 23:04 UTC|newest]

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-12 23:04 [PATCH 0/2] Avoid spawning gzip in git archive Johannes Schindelin via GitGitGadget
2019-04-12 23:04 ` Rohit Ashiwal via GitGitGadget [this message]
2019-04-13  1:34   ` [PATCH 1/2] archive: replace write_or_die() calls with write_block_or_die() Jeff King
2019-04-13  5:51     ` Junio C Hamano
2019-04-14  4:36       ` Rohit Ashiwal
2019-04-26 14:29       ` Johannes Schindelin
2019-04-26 23:44         ` Junio C Hamano
2019-04-29 21:32           ` Johannes Schindelin
2019-05-01 18:09             ` Jeff King
2019-05-02 20:29               ` René Scharfe
2019-05-05  5:25               ` Junio C Hamano
2019-05-06  5:07                 ` Jeff King
2019-04-14  4:34     ` Rohit Ashiwal
2019-04-14 10:33       ` Junio C Hamano
2019-04-26 14:28     ` Johannes Schindelin
2019-05-01 18:07       ` Jeff King
2019-04-12 23:04 ` [PATCH 2/2] archive: avoid spawning `gzip` Rohit Ashiwal via GitGitGadget
2019-04-13  1:51   ` Jeff King
2019-04-13 22:01     ` René Scharfe
2019-04-15 21:35       ` Jeff King
2019-04-26 14:51         ` Johannes Schindelin
2019-04-27  9:59           ` René Scharfe
2019-04-27 17:39             ` René Scharfe
2019-04-29 21:25               ` Johannes Schindelin
2019-05-01 17:45                 ` René Scharfe
2019-05-01 18:18                   ` Jeff King
2019-06-10 10:44                     ` René Scharfe
2019-06-13 19:16                       ` Jeff King
2019-04-13 22:16     ` brian m. carlson
2019-04-15 21:36       ` Jeff King
2019-04-26 14:54       ` Johannes Schindelin
2019-05-02 20:20         ` Ævar Arnfjörð Bjarmason
2019-05-03 20:49           ` Johannes Schindelin
2019-05-03 20:52             ` Jeff King
2019-04-26 14:47     ` Johannes Schindelin
     [not found] ` <pull.145.v2.git.gitgitgadget@gmail.com>
     [not found]   ` <4ea94a8784876c3a19e387537edd81a957fc692c.1556321244.git.gitgitgadget@gmail.com>
2019-05-02 20:29     ` [PATCH v2 3/4] archive: optionally use zlib directly for gzip compression René Scharfe
     [not found]   ` <ac2b2488a1b42b3caf8a84594c48eca796748e59.1556321244.git.gitgitgadget@gmail.com>
2019-05-02 20:30     ` [PATCH v2 2/4] archive-tar: mark RECORDSIZE/BLOCKSIZE as unsigned René Scharfe
2019-05-08 11:45       ` Johannes Schindelin
2019-05-08 23:04         ` Jeff King
2019-05-09 14:06           ` Johannes Schindelin
2019-05-09 18:38             ` Jeff King
2019-05-10 17:18               ` René Scharfe
2019-05-10 21:20                 ` Jeff King
2022-06-12  6:00 ` [PATCH v3 0/5] Avoid spawning gzip in git archive René Scharfe
2022-06-12  6:03   ` [PATCH v3 1/5] archive: rename archiver data field to filter_command René Scharfe
2022-06-12  6:05   ` [PATCH v3 2/5] archive-tar: factor out write_block() René Scharfe
2022-06-12  6:08   ` [PATCH v3 3/5] archive-tar: add internal gzip implementation René Scharfe
2022-06-13 19:10     ` Junio C Hamano
2022-06-12  6:18   ` [PATCH v3 4/5] archive-tar: use OS_CODE 3 (Unix) for internal gzip René Scharfe
2022-06-12  6:19   ` [PATCH v3 5/5] archive-tar: use internal gzip by default René Scharfe
2022-06-13 21:55     ` Junio C Hamano
2022-06-14 11:27       ` Johannes Schindelin
2022-06-14 15:47         ` René Scharfe
2022-06-14 15:56           ` René Scharfe
2022-06-14 16:29           ` Johannes Schindelin
2022-06-14 20:04             ` René Scharfe
2022-06-15 16:41               ` Junio C Hamano
2022-06-14 11:28   ` [PATCH v3 0/5] Avoid spawning gzip in git archive Johannes Schindelin
2022-06-14 20:05     ` René Scharfe
2022-06-30 18:55       ` Johannes Schindelin
2022-07-01 16:05         ` Johannes Schindelin
2022-07-01 16:27           ` Jeff King
2022-07-01 17:47             ` Junio C Hamano
2022-06-15 16:53 ` [PATCH v4 0/6] " René Scharfe
2022-06-15 16:58   ` [PATCH v4 1/6] archive: update format documentation René Scharfe
2022-06-15 16:59   ` [PATCH v4 2/6] archive: rename archiver data field to filter_command René Scharfe
2022-06-15 17:01   ` [PATCH v4 3/6] archive-tar: factor out write_block() René Scharfe
2022-06-15 17:02   ` [PATCH v4 4/6] archive-tar: add internal gzip implementation René Scharfe
2022-06-15 20:32     ` Ævar Arnfjörð Bjarmason
2022-06-16 18:55       ` René Scharfe
2022-06-24 11:13         ` Ævar Arnfjörð Bjarmason
2022-06-24 20:24           ` René Scharfe
2022-06-15 17:04   ` [PATCH v4 5/6] archive-tar: use OS_CODE 3 (Unix) for internal gzip René Scharfe
2022-06-15 17:05   ` [PATCH v4 6/6] archive-tar: use internal gzip by default René Scharfe

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