Sorry I forgot to --in-reply-to the previous version [1]
[1]
https://public-inbox.org/git/20180524162504.158394-1-dsto...@microsoft.com/T/#u
On 6/4/2018 12:52 PM, Derrick Stolee wrote:
Thanks for the feedback on v3. There were several small cleanups, but
perhaps the biggest change is the addition of "commit-graph: use
string-list API for input" which makes "commit-graph: add '--reachable'
option" much simpler.
The inter-diff is still reasonably large, but I'll send it in a
follow-up PR.
s/PR/message
Here is that diff:
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 9a3abd87e7..d2eb3c8e9b 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -900,7 +900,8 @@ the `GIT_NOTES_REF` environment variable. See
linkgit:git-notes[1].
core.commitGraph::
Enable git commit graph feature. Allows reading from the
- commit-graph file.
+ commit-graph file. See `gc.commitGraph` for automatically
+ maintaining the file.
core.sparseCheckout::
Enable "sparse checkout" feature. See section "Sparse checkout" in
@@ -1554,10 +1555,11 @@ gc.autoDetach::
if the system supports it. Default is true.
gc.commitGraph::
- If true, then gc will rewrite the commit-graph file after any
- change to the object database. If '--auto' is used, then the
- commit-graph will not be updated unless the threshold is met.
- See linkgit:git-commit-graph[1] for details.
+ If true, then gc will rewrite the commit-graph file when
+ linkgit:git-gc[1] is run. When using linkgit:git-gc[1]
+ '--auto' the commit-graph will be updated if housekeeping is
+ required. Default is false. See linkgit:git-commit-graph[1]
+ for details.
gc.logExpiry::
If the file gc.log exists, then `git gc --auto` won't run
diff --git a/Documentation/git-gc.txt b/Documentation/git-gc.txt
index 17dd654a59..a6526b3592 100644
--- a/Documentation/git-gc.txt
+++ b/Documentation/git-gc.txt
@@ -119,9 +119,9 @@ The optional configuration variable `gc.packRefs`
determines if
it within all non-bare repos or it can be set to a boolean value.
This defaults to true.
-The optional configuration variable 'gc.commitGraph' determines if
-'git gc' runs 'git commit-graph write'. This can be set to a boolean
-value. This defaults to false.
+The optional configuration variable `gc.commitGraph` determines if
+'git gc' should run 'git commit-graph write'. This can be set to a
+boolean value. This defaults to false.
The optional configuration variable `gc.aggressiveWindow` controls how
much time is spent optimizing the delta compression of the objects in
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index 20ce6437ae..76423b3fa5 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -39,7 +39,7 @@ static struct opts_commit_graph {
static int graph_verify(int argc, const char **argv)
{
- struct commit_graph *graph = 0;
+ struct commit_graph *graph = NULL;
char *graph_name;
static struct option builtin_commit_graph_verify_options[] = {
@@ -119,13 +119,9 @@ static int graph_read(int argc, const char **argv)
static int graph_write(int argc, const char **argv)
{
- const char **pack_indexes = NULL;
- int packs_nr = 0;
- const char **commit_hex = NULL;
- int commits_nr = 0;
- const char **lines = NULL;
- int lines_nr = 0;
- int lines_alloc = 0;
+ struct string_list *pack_indexes = NULL;
+ struct string_list *commit_hex = NULL;
+ struct string_list lines;
static struct option builtin_commit_graph_write_options[] = {
OPT_STRING(0, "object-dir", &opts.obj_dir,
@@ -158,32 +154,23 @@ static int graph_write(int argc, const char **argv)
if (opts.stdin_packs || opts.stdin_commits) {
struct strbuf buf = STRBUF_INIT;
- lines_nr = 0;
- lines_alloc = 128;
- ALLOC_ARRAY(lines, lines_alloc);
-
- while (strbuf_getline(&buf, stdin) != EOF) {
- ALLOC_GROW(lines, lines_nr + 1, lines_alloc);
- lines[lines_nr++] = strbuf_detach(&buf, NULL);
- }
-
- if (opts.stdin_packs) {
- pack_indexes = lines;
- packs_nr = lines_nr;
- }
- if (opts.stdin_commits) {
- commit_hex = lines;
- commits_nr = lines_nr;
- }
+ string_list_init(&lines, 0);
+
+ while (strbuf_getline(&buf, stdin) != EOF)
+ string_list_append(&lines, strbuf_detach(&buf,
NULL));
+
+ if (opts.stdin_packs)
+ pack_indexes = &lines;
+ if (opts.stdin_commits)
+ commit_hex = &lines;
}
write_commit_graph(opts.obj_dir,
pack_indexes,
- packs_nr,
commit_hex,
- commits_nr,
opts.append);
+ string_list_clear(&lines, 0);
return 0;
}
@@ -207,10 +194,10 @@ int cmd_commit_graph(int argc, const char **argv,
const char *prefix)
PARSE_OPT_STOP_AT_NON_OPTION);
if (argc > 0) {
- if (!strcmp(argv[0], "verify"))
- return graph_verify(argc, argv);
if (!strcmp(argv[0], "read"))
return graph_read(argc, argv);
+ if (!strcmp(argv[0], "verify"))
+ return graph_verify(argc, argv);
if (!strcmp(argv[0], "write"))
return graph_write(argc, argv);
}
diff --git a/commit-graph.c b/commit-graph.c
index 057d734926..946bcfa98c 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -1,5 +1,6 @@
#include "cache.h"
#include "config.h"
+#include "dir.h"
#include "git-compat-util.h"
#include "lockfile.h"
#include "pack.h"
@@ -652,42 +653,26 @@ static void compute_generation_numbers(struct
packed_commit_list* commits)
}
}
-struct hex_list {
- char **hex_strs;
- int hex_nr;
- int hex_alloc;
-};
-
static int add_ref_to_list(const char *refname,
const struct object_id *oid,
int flags, void *cb_data)
{
- struct hex_list *list = (struct hex_list*)cb_data;
-
- ALLOC_GROW(list->hex_strs, list->hex_nr + 1, list->hex_alloc);
- list->hex_strs[list->hex_nr] = xcalloc(GIT_MAX_HEXSZ + 1, 1);
- strcpy(list->hex_strs[list->hex_nr], oid_to_hex(oid));
- list->hex_nr++;
+ struct string_list *list = (struct string_list*)cb_data;
+ string_list_append(list, oid_to_hex(oid));
return 0;
}
void write_commit_graph_reachable(const char *obj_dir, int append)
{
- struct hex_list list;
- list.hex_nr = 0;
- list.hex_alloc = 128;
- ALLOC_ARRAY(list.hex_strs, list.hex_alloc);
-
+ struct string_list list;
+ string_list_init(&list, 1);
for_each_ref(add_ref_to_list, &list);
-
- write_commit_graph(obj_dir, NULL, 0, (const char
**)list.hex_strs, list.hex_nr, append);
+ write_commit_graph(obj_dir, NULL, &list, append);
}
void write_commit_graph(const char *obj_dir,
- const char **pack_indexes,
- int nr_packs,
- const char **commit_hex,
- int nr_commits,
+ struct string_list *pack_indexes,
+ struct string_list *commit_hex,
int append)
{
struct packed_oid_list oids;
@@ -695,7 +680,6 @@ void write_commit_graph(const char *obj_dir,
struct hashfile *f;
uint32_t i, count_distinct = 0;
char *graph_name;
- int fd;
struct lock_file lk = LOCK_INIT;
uint32_t chunk_ids[5];
uint64_t chunk_offsets[5];
@@ -729,10 +713,10 @@ void write_commit_graph(const char *obj_dir,
int dirlen;
strbuf_addf(&packname, "%s/pack/", obj_dir);
dirlen = packname.len;
- for (i = 0; i < nr_packs; i++) {
+ for (i = 0; i < pack_indexes->nr; i++) {
struct packed_git *p;
strbuf_setlen(&packname, dirlen);
- strbuf_addstr(&packname, pack_indexes[i]);
+ strbuf_addstr(&packname,
pack_indexes->items[i].string);
p = add_packed_git(packname.buf, packname.len, 1);
if (!p)
die("error adding pack %s", packname.buf);
@@ -745,12 +729,13 @@ void write_commit_graph(const char *obj_dir,
}
if (commit_hex) {
- for (i = 0; i < nr_commits; i++) {
+ for (i = 0; i < commit_hex->nr; i++) {
const char *end;
struct object_id oid;
struct commit *result;
- if (commit_hex[i] &&
parse_oid_hex(commit_hex[i], &oid, &end))
+ if (commit_hex->items[i].string &&
+ parse_oid_hex(commit_hex->items[i].string, &oid, &end))
continue;
result = lookup_commit_reference_gently(&oid, 1);
@@ -809,23 +794,11 @@ void write_commit_graph(const char *obj_dir,
compute_generation_numbers(&commits);
graph_name = get_commit_graph_filename(obj_dir);
- fd = hold_lock_file_for_update(&lk, graph_name, 0);
-
- if (fd < 0) {
- struct strbuf folder = STRBUF_INIT;
- strbuf_addstr(&folder, graph_name);
- strbuf_setlen(&folder, strrchr(folder.buf, '/') -
folder.buf);
-
- if (mkdir(folder.buf, 0777) < 0)
- die_errno(_("cannot mkdir %s"), folder.buf);
- strbuf_release(&folder);
-
- fd = hold_lock_file_for_update(&lk, graph_name,
LOCK_DIE_ON_ERROR);
-
- if (fd < 0)
- die_errno("unable to create '%s'", graph_name);
- }
+ if (safe_create_leading_directories(graph_name))
+ die_errno(_("unable to create leading directories of %s"),
+ graph_name);
+ hold_lock_file_for_update(&lk, graph_name, LOCK_DIE_ON_ERROR);
f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf);
hashwrite_be32(f, GRAPH_SIGNATURE);
@@ -879,21 +852,22 @@ static int verify_commit_graph_error;
static void graph_report(const char *fmt, ...)
{
va_list ap;
- struct strbuf sb = STRBUF_INIT;
verify_commit_graph_error = 1;
va_start(ap, fmt);
- strbuf_vaddf(&sb, fmt, ap);
-
- fprintf(stderr, "%s\n", sb.buf);
- strbuf_release(&sb);
+ vfprintf(stderr, fmt, ap);
+ fprintf(stderr, "\n");
va_end(ap);
}
+#define GENERATION_ZERO_EXISTS 1
+#define GENERATION_NUMBER_EXISTS 2
+
int verify_commit_graph(struct commit_graph *g)
{
uint32_t i, cur_fanout_pos = 0;
struct object_id prev_oid, cur_oid, checksum;
+ int generation_zero = 0;
struct hashfile *f;
int devnull;
@@ -1012,6 +986,18 @@ int verify_commit_graph(struct commit_graph *g)
graph_report("commit-graph parent list for
commit %s terminates early",
oid_to_hex(&cur_oid));
+ if (!graph_commit->generation) {
+ if (generation_zero == GENERATION_NUMBER_EXISTS)
+ graph_report("commit-graph has
generation number zero for commit %s, but non-zero elsewhere",
+ oid_to_hex(&cur_oid));
+ generation_zero = GENERATION_ZERO_EXISTS;
+ } else if (generation_zero == GENERATION_ZERO_EXISTS)
+ graph_report("commit-graph has non-zero
generation number for commit %s, but zero elsewhere",
+ oid_to_hex(&cur_oid));
+
+ if (generation_zero == GENERATION_ZERO_EXISTS)
+ continue;
+
/*
* If one of our parents has generation
GENERATION_NUMBER_MAX, then
* our generation is also GENERATION_NUMBER_MAX.
Decrement to avoid
diff --git a/commit-graph.h b/commit-graph.h
index 9a06a5f188..ee20f5e280 100644
--- a/commit-graph.h
+++ b/commit-graph.h
@@ -2,6 +2,7 @@
#define COMMIT_GRAPH_H
#include "git-compat-util.h"
+#include "string-list.h"
char *get_commit_graph_filename(const char *obj_dir);
@@ -48,10 +49,8 @@ struct commit_graph *load_commit_graph_one(const char
*graph_file);
void write_commit_graph_reachable(const char *obj_dir, int append);
void write_commit_graph(const char *obj_dir,
- const char **pack_indexes,
- int nr_packs,
- const char **commit_hex,
- int nr_commits,
+ struct string_list *pack_indexes,
+ struct string_list *commit_hex,
int append);
int verify_commit_graph(struct commit_graph *g);
diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh
index d20b17586f..b24e8b6689 100755
--- a/t/t5318-commit-graph.sh
+++ b/t/t5318-commit-graph.sh
@@ -33,8 +33,8 @@ test_expect_success 'create commits and repack' '
'
graph_git_two_modes() {
- git -c core.graph=true $1 >output
- git -c core.graph=false $1 >expect
+ git -c core.commitGraph=true $1 >output
+ git -c core.commitGraph=false $1 >expect
test_cmp output expect
}
@@ -245,7 +245,7 @@ test_expect_success 'perform fast-forward merge in
full repo' '
test_cmp expect output
'
-test_expect_success 'check that gc clears commit-graph' '
+test_expect_success 'check that gc computes commit-graph' '
cd "$TRASH_DIRECTORY/full" &&
git commit --allow-empty -m "blank" &&
git commit-graph write --reachable &&
@@ -281,29 +281,29 @@ GRAPH_CHUNK_LOOKUP_OFFSET=8
GRAPH_CHUNK_LOOKUP_WIDTH=12
GRAPH_CHUNK_LOOKUP_ROWS=5
GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
-GRAPH_BYTE_OID_LOOKUP_ID=`expr $GRAPH_CHUNK_LOOKUP_OFFSET + \
- 1 \* $GRAPH_CHUNK_LOOKUP_WIDTH`
-GRAPH_BYTE_COMMIT_DATA_ID=`expr $GRAPH_CHUNK_LOOKUP_OFFSET + \
- 2 \* $GRAPH_CHUNK_LOOKUP_WIDTH`
-GRAPH_FANOUT_OFFSET=`expr $GRAPH_CHUNK_LOOKUP_OFFSET + \
- $GRAPH_CHUNK_LOOKUP_WIDTH \*
$GRAPH_CHUNK_LOOKUP_ROWS`
-GRAPH_BYTE_FANOUT1=`expr $GRAPH_FANOUT_OFFSET + 4 \* 4`
-GRAPH_BYTE_FANOUT2=`expr $GRAPH_FANOUT_OFFSET + 4 \* 255`
-GRAPH_OID_LOOKUP_OFFSET=`expr $GRAPH_FANOUT_OFFSET + 4 \* 256`
-GRAPH_BYTE_OID_LOOKUP_ORDER=`expr $GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN
\* 8`
-GRAPH_BYTE_OID_LOOKUP_MISSING=`expr $GRAPH_OID_LOOKUP_OFFSET +
$HASH_LEN \* 4 + 10`
-GRAPH_COMMIT_DATA_OFFSET=`expr $GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN \*
$NUM_COMMITS`
+GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
+ 1 \* $GRAPH_CHUNK_LOOKUP_WIDTH))
+GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
+ 2 \* $GRAPH_CHUNK_LOOKUP_WIDTH))
+GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
+ $GRAPH_CHUNK_LOOKUP_WIDTH \*
$GRAPH_CHUNK_LOOKUP_ROWS))
+GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 \* 4))
+GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 \* 255))
+GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 \* 256))
+GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN \* 8))
+GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN
\* 4 + 10))
+GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN \*
$NUM_COMMITS))
GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
-GRAPH_BYTE_COMMIT_PARENT=`expr $GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN`
-GRAPH_BYTE_COMMIT_EXTRA_PARENT=`expr $GRAPH_COMMIT_DATA_OFFSET +
$HASH_LEN + 4`
-GRAPH_BYTE_COMMIT_WRONG_PARENT=`expr $GRAPH_COMMIT_DATA_OFFSET +
$HASH_LEN + 3`
-GRAPH_BYTE_COMMIT_GENERATION=`expr $GRAPH_COMMIT_DATA_OFFSET +
$HASH_LEN + 8`
-GRAPH_BYTE_COMMIT_DATE=`expr $GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12`
-GRAPH_COMMIT_DATA_WIDTH=`expr $HASH_LEN + 16`
-GRAPH_OCTOPUS_DATA_OFFSET=`expr $GRAPH_COMMIT_DATA_OFFSET + \
- $GRAPH_COMMIT_DATA_WIDTH \* $NUM_COMMITS`
-GRAPH_BYTE_OCTOPUS=`expr $GRAPH_OCTOPUS_DATA_OFFSET + 4`
-GRAPH_BYTE_FOOTER=`expr $GRAPH_OCTOPUS_DATA_OFFSET + 4 \*
$NUM_OCTOPUS_EDGES`
+GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
+GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN
+ 4))
+GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN
+ 3))
+GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN +
11))
+GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
+GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
+GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
+ $GRAPH_COMMIT_DATA_WIDTH \* $NUM_COMMITS))
+GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
+GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 \* $NUM_OCTOPUS_EDGES))
# usage: corrupt_graph_and_verify <position> <data> <string>
# Manipulates the commit-graph file at the position
@@ -320,7 +320,7 @@ corrupt_graph_and_verify() {
printf "$data" | dd of="$objdir/info/commit-graph" bs=1
seek="$pos" conv=notrunc &&
test_must_fail git commit-graph verify 2>test_err &&
grep -v "^+" test_err >err
- grep "$grepstr" err
+ test_i18ngrep "$grepstr" err
}
test_expect_success 'detect bad signature' '
@@ -338,9 +338,9 @@ test_expect_success 'detect bad hash version' '
"hash version"
'
-test_expect_success 'detect bad chunk count' '
+test_expect_success 'detect low chunk count' '
corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
- "missing the Commit Data chunk"
+ "missing the .* chunk"
'
test_expect_success 'detect missing OID fanout chunk' '
@@ -363,7 +363,7 @@ test_expect_success 'detect incorrect fanout' '
"fanout value"
'
-test_expect_success 'detect incorrect fanout' '
+test_expect_success 'detect incorrect fanout final value' '
corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
"fanout value"
'
@@ -393,14 +393,19 @@ test_expect_success 'detect extra parent int-id' '
"is too long"
'
-test_expect_success 'detect incorrect tree OID' '
+test_expect_success 'detect wrong parent' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
"commit-graph parent for"
'
+test_expect_success 'detect incorrect generation number' '
+ corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
+ "generation for commit"
+'
+
test_expect_success 'detect incorrect generation number' '
corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
- "generation"
+ "non-zero generation number"
'
test_expect_success 'detect incorrect commit date' '
