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From: "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: jrnieder@gmail.com, Derrick Stolee <derrickstolee@github.com>,
	Derrick Stolee <derrickstolee@github.com>
Subject: [PATCH 14/30] packed-backend: extract iterator/updates merge
Date: Mon, 07 Nov 2022 18:35:48 +0000	[thread overview]
Message-ID: <cca445cd7d8ae0ab891fcbe1e2087b3552ac3576.1667846165.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.1408.git.1667846164.gitgitgadget@gmail.com>

From: Derrick Stolee <derrickstolee@github.com>

TBD

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
---
 refs/packed-backend.c | 117 +++++++++++++++++++++++-------------------
 1 file changed, 64 insertions(+), 53 deletions(-)

diff --git a/refs/packed-backend.c b/refs/packed-backend.c
index ef8060f2e08..0dff78f02c8 100644
--- a/refs/packed-backend.c
+++ b/refs/packed-backend.c
@@ -535,58 +535,13 @@ static void add_write_error(struct packed_ref_store *refs, struct strbuf *err)
 		    get_tempfile_path(refs->tempfile), strerror(errno));
 }
 
-/*
- * Write the packed refs from the current snapshot to the packed-refs
- * tempfile, incorporating any changes from `updates`. `updates` must
- * be a sorted string list whose keys are the refnames and whose util
- * values are `struct ref_update *`. On error, rollback the tempfile,
- * write an error message to `err`, and return a nonzero value.
- *
- * The packfile must be locked before calling this function and will
- * remain locked when it is done.
- */
-static int write_with_updates(struct packed_ref_store *refs,
-			      struct string_list *updates,
-			      struct strbuf *err)
+static int merge_iterator_and_updates(struct packed_ref_store *refs,
+				      struct string_list *updates,
+				      struct strbuf *err,
+				      FILE *out)
 {
 	struct ref_iterator *iter = NULL;
-	size_t i;
-	int ok;
-	FILE *out;
-	struct strbuf sb = STRBUF_INIT;
-	char *packed_refs_path;
-
-	if (!is_lock_file_locked(&refs->lock))
-		BUG("write_with_updates() called while unlocked");
-
-	/*
-	 * If packed-refs is a symlink, we want to overwrite the
-	 * symlinked-to file, not the symlink itself. Also, put the
-	 * staging file next to it:
-	 */
-	packed_refs_path = get_locked_file_path(&refs->lock);
-	strbuf_addf(&sb, "%s.new", packed_refs_path);
-	free(packed_refs_path);
-	refs->tempfile = create_tempfile(sb.buf);
-	if (!refs->tempfile) {
-		strbuf_addf(err, "unable to create file %s: %s",
-			    sb.buf, strerror(errno));
-		strbuf_release(&sb);
-		return -1;
-	}
-	strbuf_release(&sb);
-
-	out = fdopen_tempfile(refs->tempfile, "w");
-	if (!out) {
-		strbuf_addf(err, "unable to fdopen packed-refs tempfile: %s",
-			    strerror(errno));
-		goto error;
-	}
-
-	if (write_packed_file_header_v1(out) < 0) {
-		add_write_error(refs, err);
-		goto error;
-	}
+	int ok, i;
 
 	/*
 	 * We iterate in parallel through the current list of refs and
@@ -713,6 +668,65 @@ static int write_with_updates(struct packed_ref_store *refs,
 		}
 	}
 
+error:
+	if (iter)
+		ref_iterator_abort(iter);
+	return ok;
+}
+
+/*
+ * Write the packed refs from the current snapshot to the packed-refs
+ * tempfile, incorporating any changes from `updates`. `updates` must
+ * be a sorted string list whose keys are the refnames and whose util
+ * values are `struct ref_update *`. On error, rollback the tempfile,
+ * write an error message to `err`, and return a nonzero value.
+ *
+ * The packfile must be locked before calling this function and will
+ * remain locked when it is done.
+ */
+static int write_with_updates(struct packed_ref_store *refs,
+			      struct string_list *updates,
+			      struct strbuf *err)
+{
+	int ok;
+	FILE *out;
+	struct strbuf sb = STRBUF_INIT;
+	char *packed_refs_path;
+
+	if (!is_lock_file_locked(&refs->lock))
+		BUG("write_with_updates() called while unlocked");
+
+	/*
+	 * If packed-refs is a symlink, we want to overwrite the
+	 * symlinked-to file, not the symlink itself. Also, put the
+	 * staging file next to it:
+	 */
+	packed_refs_path = get_locked_file_path(&refs->lock);
+	strbuf_addf(&sb, "%s.new", packed_refs_path);
+	free(packed_refs_path);
+	refs->tempfile = create_tempfile(sb.buf);
+	if (!refs->tempfile) {
+		strbuf_addf(err, "unable to create file %s: %s",
+			    sb.buf, strerror(errno));
+		strbuf_release(&sb);
+		return -1;
+	}
+	strbuf_release(&sb);
+
+	out = fdopen_tempfile(refs->tempfile, "w");
+	if (!out) {
+		strbuf_addf(err, "unable to fdopen packed-refs tempfile: %s",
+			    strerror(errno));
+		goto error;
+	}
+
+	if (write_packed_file_header_v1(out) < 0) {
+		add_write_error(refs, err);
+		goto error;
+	}
+
+	ok = merge_iterator_and_updates(refs, updates, err, out);
+
 	if (ok != ITER_DONE) {
 		strbuf_addstr(err, "unable to write packed-refs file: "
 			      "error iterating over old contents");
@@ -732,9 +746,6 @@ static int write_with_updates(struct packed_ref_store *refs,
 	return 0;
 
 error:
-	if (iter)
-		ref_iterator_abort(iter);
-
 	delete_tempfile(&refs->tempfile);
 	return -1;
 }
-- 
gitgitgadget


  parent reply	other threads:[~2022-11-07 18:37 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-07 18:35 [PATCH 00/30] [RFC] extensions.refFormat and packed-refs v2 file format Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 01/30] hashfile: allow skipping the hash function Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 02/30] read-cache: add index.computeHash config option Derrick Stolee via GitGitGadget
2022-11-11 23:31   ` Elijah Newren
2022-11-14 16:30     ` Derrick Stolee
2022-11-17 16:13   ` Ævar Arnfjörð Bjarmason
2022-11-07 18:35 ` [PATCH 03/30] extensions: add refFormat extension Derrick Stolee via GitGitGadget
2022-11-11 23:39   ` Elijah Newren
2022-11-16 14:37     ` Derrick Stolee
2022-11-07 18:35 ` [PATCH 04/30] config: fix multi-level bulleted list Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 05/30] repository: wire ref extensions to ref backends Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 06/30] refs: allow loose files without packed-refs Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 07/30] chunk-format: number of chunks is optional Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 08/30] chunk-format: document trailing table of contents Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 09/30] chunk-format: store chunk offset during write Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 10/30] chunk-format: allow trailing table of contents Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 11/30] chunk-format: parse " Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 12/30] refs: extract packfile format to new file Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 13/30] packed-backend: extract add_write_error() Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` Derrick Stolee via GitGitGadget [this message]
2022-11-07 18:35 ` [PATCH 15/30] packed-backend: create abstraction for writing refs Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 16/30] config: add config values for packed-refs v2 Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 17/30] packed-backend: create shell of v2 writes Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 18/30] packed-refs: write file format version 2 Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 19/30] packed-refs: read file format v2 Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 20/30] packed-refs: read optional prefix chunks Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 21/30] packed-refs: write " Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 22/30] packed-backend: create GIT_TEST_PACKED_REFS_VERSION Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 23/30] t1409: test with packed-refs v2 Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 24/30] t5312: allow packed-refs v2 format Derrick Stolee via GitGitGadget
2022-11-07 18:35 ` [PATCH 25/30] t5502: add PACKED_REFS_V1 prerequisite Derrick Stolee via GitGitGadget
2022-11-07 18:36 ` [PATCH 26/30] t3210: require packed-refs v1 for some tests Derrick Stolee via GitGitGadget
2022-11-07 18:36 ` [PATCH 27/30] t*: skip packed-refs v2 over http tests Derrick Stolee via GitGitGadget
2022-11-07 18:36 ` [PATCH 28/30] ci: run GIT_TEST_PACKED_REFS_VERSION=2 in some builds Derrick Stolee via GitGitGadget
2022-11-07 18:36 ` [PATCH 29/30] p1401: create performance test for ref operations Derrick Stolee via GitGitGadget
2022-11-07 18:36 ` [PATCH 30/30] refs: skip hashing when writing packed-refs v2 Derrick Stolee via GitGitGadget
2022-11-09 15:15 ` [PATCH 00/30] [RFC] extensions.refFormat and packed-refs v2 file format Derrick Stolee
2022-11-11 23:28 ` Elijah Newren
2022-11-14  0:07   ` Derrick Stolee
2022-11-15  2:47     ` Elijah Newren
2022-11-16 14:45       ` Derrick Stolee
2022-11-17  4:28         ` Elijah Newren
2022-11-18 23:31     ` Junio C Hamano
2022-11-19  0:41       ` Elijah Newren
2022-11-19  3:00         ` Taylor Blau
2022-11-30 15:31       ` Derrick Stolee
2022-11-28 18:56 ` Han-Wen Nienhuys
2022-11-30 15:16   ` Derrick Stolee
2022-11-30 15:38     ` Phillip Wood
2022-11-30 16:37     ` Taylor Blau
2022-11-30 18:30     ` Han-Wen Nienhuys
2022-11-30 18:37       ` Sean Allred
2022-12-01 20:18       ` Derrick Stolee
2022-12-02 16:46         ` Han-Wen Nienhuys
2022-12-02 18:24           ` Ævar Arnfjörð Bjarmason
2022-11-30 22:55     ` Junio C Hamano

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