[PATCH v2 0/3] builtin/commit-graph.c: new split/merge options
- From
Taylor Blau <me@ttaylorr.com>
- Date
- Feb 5, 2020, 00:28 UTC
- Message-ID
- <cover.1580862307.git.me@ttaylorr.com>
- In-Reply-To
- <cover.1580430057.git.me@ttaylorr.com>
Hi,
Here is an updated 'v2' of my series to introduce new splitting and merging options to the 'commit-graph write' builtin.
These patches are updated to be based on the latest changes in the series upon which this is based (tb/commit-graph-use-odb), and contain some other fixes that I picked up during the last round of review. For convenience, I included a range-diff against 'v1' below.
Thanks as always for your review.
Taylor
Taylor Blau (3): builtin/commit-graph.c: support '--split[=<strategy>]' builtin/commit-graph.c: introduce '--input=<source>' builtin/commit-graph.c: support '--input=none'
Documentation/git-commit-graph.txt | 50 ++++++++----- builtin/commit-graph.c | 115 +++++++++++++++++++++++------ commit-graph.c | 28 ++++--- commit-graph.h | 10 ++- t/t5318-commit-graph.sh | 4 +- t/t5324-split-commit-graph.sh | 53 ++++++++++++- 6 files changed, 204 insertions(+), 56 deletions(-)
Range-diff against v1:
1: 470bbe3cef ! 1: 3e19d50148 builtin/commit-graph.c: support '--split[=<strategy>]'
@@ Commit message
With '--split', the commit-graph machinery writes new commits in another
incremental commit-graph which is part of the existing chain, and
optionally decides to condense the chain into a single commit-graph.
- This is done to ensure that the aysmptotic behavior of looking up a
+ This is done to ensure that the asymptotic behavior of looking up a
commit in an incremental chain is dominated by the number of
incrementals in that chain. It can be controlled by the '--max-commits'
and '--size-multiple' options.
@@ Documentation/git-commit-graph.txt: or `--stdin-packs`.)
+conducted, and the remaining options are ignored. Conversely, if
+`--split=no-merge` is specified, a merge is never performed, and the
+remaining options are ignored. A bare `--split` defers to the remaining
-+options. (Note that merging a chain of commit graphs replaces the
-+existing chain with a length-1 chain where the first and only
-+incremental holds the entire graph).
++options.
+
* If `--size-multiple=<X>` is not specified, let `X` equal 2. If the new
tip file would have `N` commits and the previous tip has `M` commits and
@@ builtin/commit-graph.c: static int graph_verify(int argc, const char **argv)
+ enum commit_graph_split_flags *flags = opt->value;
+
+ opts.split = 1;
-+ if (!arg)
++ if (!arg) {
++ *flags = COMMIT_GRAPH_SPLIT_MERGE_AUTO;
+ return 0;
++ }
+
+ if (!strcmp(arg, "merge-all"))
+ *flags = COMMIT_GRAPH_SPLIT_MERGE_REQUIRED;
@@ builtin/commit-graph.c: static int graph_write(int argc, const char **argv) ## commit-graph.c ##
@@ commit-graph.c: static void split_graph_merge_strategy(struct write_commit_graph_context *ctx)
+
+ int max_commits = 0;
+ int size_mult = 2;
++ enum commit_graph_split_flags flags = COMMIT_GRAPH_SPLIT_MERGE_AUTO;
+
+ if (ctx->split_opts) {
+ max_commits = ctx->split_opts->max_commits;
+
+ if (ctx->split_opts->size_multiple)
+ size_mult = ctx->split_opts->size_multiple;
++
++ flags = ctx->split_opts->flags;
+ }
+
+ g = ctx->r->objects->commit_graph;
num_commits = ctx->commits.nr;
ctx->num_commit_graphs_after = ctx->num_commit_graphs_before + 1; @@ commit-graph.c: static void split_graph_merge_strategy(struct write_commit_graph
- (max_commits && num_commits > max_commits))) {
- if (g->odb != ctx->odb)
- break;
-+ if (ctx->split_opts->flags != COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED) {
++ if (flags != COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED) {
+ while (g && (g->num_commits <= size_mult * num_commits ||
+ (max_commits && num_commits > max_commits) ||
-+ (ctx->split_opts->flags == COMMIT_GRAPH_SPLIT_MERGE_REQUIRED))) {
++ (flags == COMMIT_GRAPH_SPLIT_MERGE_REQUIRED))) {
+ if (g->odb != ctx->odb)
+ break; @@ commit-graph.c: int write_commit_graph(struct object_directory *odb,
} - if (!ctx->commits.nr)
-+ if (!ctx->commits.nr && (!ctx->split || ctx->split_opts->flags != COMMIT_GRAPH_SPLIT_MERGE_REQUIRED))
++ if (!ctx->commits.nr && (!ctx->split_opts || ctx->split_opts->flags != COMMIT_GRAPH_SPLIT_MERGE_REQUIRED))
goto cleanup; if (ctx->split) {
@@ commit-graph.h: enum commit_graph_write_flags {
}; +enum commit_graph_split_flags {
-+ COMMIT_GRAPH_SPLIT_UNSPECIFIED = 0,
++ COMMIT_GRAPH_SPLIT_MERGE_AUTO = 0,
+ COMMIT_GRAPH_SPLIT_MERGE_REQUIRED = 1,
+ COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED = 2
+};
2: 1b585fe4e7 ! 2: 1589bc1d69 builtin/commit-graph.c: introduce '--input=<source>'
@@ Documentation/git-commit-graph.txt: $ git commit-graph write ## builtin/commit-graph.c ##
@@
+
static char const * const builtin_commit_graph_usage[] = {
N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]"),
- N_("git commit-graph write [--object-dir <objdir>] [--append] "
+- N_("git commit-graph write [--object-dir <objdir>] [--append] "
- "[--split[=<strategy>]] [--reachable|--stdin-packs|--stdin-commits] "
-+ "[--split[=<strategy>]] [--input=<reachable|stdin-packs|stdin-commits>] "
++ N_("git commit-graph write [--object-dir <objdir>] "
++ "[--split[=<strategy>]] "
++ "[--input=<reachable|stdin-packs|stdin-commits|append>] "
"[--[no-]progress] <split options>"),
NULL
};
@@ builtin/commit-graph.c: static const char * const builtin_commit_graph_verify_usage[] = {
+ }; static const char * const builtin_commit_graph_write_usage[] = {
- N_("git commit-graph write [--object-dir <objdir>] [--append] "
+- N_("git commit-graph write [--object-dir <objdir>] [--append] "
- "[--split[=<strategy>]] [--reachable|--stdin-packs|--stdin-commits] "
-+ "[--split[=<strategy>]] [--input=<reachable|stdin-packs|stdin-commits>] "
++ N_("git commit-graph write [--object-dir <objdir>] "
++ "[--split[=<strategy>]] "
++ "[--input=<reachable|stdin-packs|stdin-commits|append>] "
"[--[no-]progress] <split options>"),
NULL
};
@@ builtin/commit-graph.c: static int graph_write(int argc, const char **argv)
} ## t/t5318-commit-graph.sh ##
-@@ t/t5318-commit-graph.sh: test_expect_success 'write graph with no packs' '
- test_path_is_missing $objdir/info/commit-graph
- '
-
--test_expect_success 'exit with correct error on bad input to --stdin-packs' '
-+test_expect_success 'exit with correct error on bad input to --input=stdin-packs' '
- cd "$TRASH_DIRECTORY/full" &&
- echo doesnotexist >in &&
-- test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
-+ test_expect_code 1 git commit-graph write --input=stdin-packs <in 2>stderr &&
- test_i18ngrep "error adding pack" stderr
- '
-
-@@ t/t5318-commit-graph.sh: test_expect_success 'create commits and repack' '
- git repack
- '
-
--test_expect_success 'exit with correct error on bad input to --stdin-commits' '
-+test_expect_success 'exit with correct error on bad input to --input=stdin-commits' '
- cd "$TRASH_DIRECTORY/full" &&
-- echo HEAD | test_expect_code 1 git commit-graph write --stdin-commits 2>stderr &&
-+ echo HEAD | test_expect_code 1 git commit-graph write --input=stdin-commits 2>stderr &&
- test_i18ngrep "invalid commit object id" stderr &&
- # valid tree OID, but not a commit OID
-- git rev-parse HEAD^{tree} | test_expect_code 1 git commit-graph write --stdin-commits 2>stderr &&
-+ git rev-parse HEAD^{tree} | test_expect_code 1 git commit-graph write --input=stdin-commits 2>stderr &&
- test_i18ngrep "invalid commit object id" stderr
- '
-
@@ t/t5318-commit-graph.sh: graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2 test_expect_success 'build graph from latest pack with closure' '
@@ t/t5318-commit-graph.sh: test_expect_success 'build graph from commits with clos
test_path_is_file $objdir/info/commit-graph &&
graph_read_expect "6"
'
-@@ t/t5318-commit-graph.sh: graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merg
-
- test_expect_success 'build graph from commits with append' '
- cd "$TRASH_DIRECTORY/full" &&
-- git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
-+ git rev-parse merge/3 | git commit-graph write --input=stdin-commits --input=append &&
- test_path_is_file $objdir/info/commit-graph &&
- graph_read_expect "10" "extra_edges"
- '
-@@ t/t5318-commit-graph.sh: graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
-
- test_expect_success 'build graph using --reachable' '
- cd "$TRASH_DIRECTORY/full" &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- test_path_is_file $objdir/info/commit-graph &&
- graph_read_expect "11" "extra_edges"
- '
-@@ t/t5318-commit-graph.sh: test_expect_success 'perform fast-forward merge in full repo' '
- test_expect_success 'check that gc computes commit-graph' '
- cd "$TRASH_DIRECTORY/full" &&
- git commit --allow-empty -m "blank" &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- cp $objdir/info/commit-graph commit-graph-before-gc &&
- git reset --hard HEAD~1 &&
- git config gc.writeCommitGraph true &&
- git gc &&
- cp $objdir/info/commit-graph commit-graph-after-gc &&
- ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
- '
-
-@@ t/t5318-commit-graph.sh: test_expect_success 'replace-objects invalidates commit-graph' '
- git clone full replace &&
- (
- cd replace &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- test_path_is_file .git/objects/info/commit-graph &&
- git replace HEAD~1 HEAD~2 &&
- git -c core.commitGraph=false log >expect &&
- git -c core.commitGraph=true log >actual &&
- test_cmp expect actual &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- git -c core.commitGraph=false --no-replace-objects log >expect &&
- git -c core.commitGraph=true --no-replace-objects log >actual &&
- test_cmp expect actual &&
- rm -rf .git/objects/info/commit-graph &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- test_path_is_file .git/objects/info/commit-graph
- )
- '
-@@ t/t5318-commit-graph.sh: test_expect_success 'commit grafts invalidate commit-graph' '
- git clone full graft &&
- (
- cd graft &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- test_path_is_file .git/objects/info/commit-graph &&
- H1=$(git rev-parse --verify HEAD~1) &&
- H3=$(git rev-parse --verify HEAD~3) &&
-@@ t/t5318-commit-graph.sh: test_expect_success 'commit grafts invalidate commit-graph' '
- git -c core.commitGraph=false log >expect &&
- git -c core.commitGraph=true log >actual &&
- test_cmp expect actual &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- git -c core.commitGraph=false --no-replace-objects log >expect &&
- git -c core.commitGraph=true --no-replace-objects log >actual &&
- test_cmp expect actual &&
- rm -rf .git/objects/info/commit-graph &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- test_path_is_missing .git/objects/info/commit-graph
- )
- '
-@@ t/t5318-commit-graph.sh: test_expect_success 'replace-objects invalidates commit-graph' '
- git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
- (
- cd shallow &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- test_path_is_missing .git/objects/info/commit-graph &&
- git fetch origin --unshallow &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- test_path_is_file .git/objects/info/commit-graph
- )
- '
-@@ t/t5318-commit-graph.sh: test_expect_success 'replace-objects invalidates commit-graph' '
-
- test_expect_success 'git commit-graph verify' '
- cd "$TRASH_DIRECTORY/full" &&
-- git rev-parse commits/8 | git commit-graph write --stdin-commits &&
-+ git rev-parse commits/8 | git commit-graph write --input=stdin-commits &&
- git commit-graph verify >output
- '
-
-@@ t/t5318-commit-graph.sh: test_expect_success 'setup non-the_repository tests' '
- test_commit -C repo two &&
- git -C repo config core.commitGraph true &&
- git -C repo rev-parse two | \
-- git -C repo commit-graph write --stdin-commits
-+ git -C repo commit-graph write --input=stdin-commits
- '
-
- test_expect_success 'parse_commit_in_graph works for non-the_repository' '
-@@ t/t5318-commit-graph.sh: test_expect_success 'corrupt commit-graph write (broken parent)' '
- EOF
- broken="$(git hash-object -w -t commit --literally broken)" &&
- git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
-- test_must_fail git commit-graph write --stdin-commits \
-+ test_must_fail git commit-graph write --input=stdin-commits \
- <good 2>test_err &&
- test_i18ngrep "unable to parse commit" test_err
- )
-@@ t/t5318-commit-graph.sh: test_expect_success 'corrupt commit-graph write (missing tree)' '
- EOF
- broken="$(git hash-object -w -t commit --literally broken)" &&
- git commit-tree -p "$broken" -m "good" "$tree" >good &&
-- test_must_fail git commit-graph write --stdin-commits \
-+ test_must_fail git commit-graph write --input=stdin-commits \
- <good 2>test_err &&
- test_i18ngrep "unable to parse commit" test_err
- ) ## t/t5324-split-commit-graph.sh ##
@@ t/t5324-split-commit-graph.sh: test_expect_success 'create commits and write commit-graph' '
@@ t/t5324-split-commit-graph.sh: test_expect_success 'create commits and write com
test_path_is_file $infodir/commit-graph &&
graph_read_expect 3
'
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'add more commits, and write a new base graph' '
- git reset --hard commits/4 &&
- git merge commits/6 &&
- git branch merge/2 &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- graph_read_expect 12
- '
-
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'fork and fail to base a chain on a commit-graph file' '
- rm .git/objects/info/commit-graph &&
- echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
- test_commit new-commit &&
-- git commit-graph write --reachable --split &&
-+ git commit-graph write --input=reachable --split &&
- test_path_is_file $graphdir/commit-graph-chain &&
- test_line_count = 1 $graphdir/commit-graph-chain &&
- verify_chain_files_exist $graphdir
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'add three more commits, write a tip graph' '
- git merge commits/5 &&
- git merge merge/2 &&
- git branch merge/3 &&
-- git commit-graph write --reachable --split &&
-+ git commit-graph write --input=reachable --split &&
- test_path_is_missing $infodir/commit-graph &&
- test_path_is_file $graphdir/commit-graph-chain &&
- ls $graphdir/graph-*.graph >graph-files &&
-@@ t/t5324-split-commit-graph.sh: graph_git_behavior 'split commit-graph: merge 3 vs 2' merge/3 merge/2
- test_expect_success 'add one commit, write a tip graph' '
- test_commit 11 &&
- git branch commits/11 &&
-- git commit-graph write --reachable --split &&
-+ git commit-graph write --input=reachable --split &&
- test_path_is_missing $infodir/commit-graph &&
- test_path_is_file $graphdir/commit-graph-chain &&
- ls $graphdir/graph-*.graph >graph-files &&
-@@ t/t5324-split-commit-graph.sh: graph_git_behavior 'three-layer commit-graph: commit 11 vs 6' commits/11 commits
- test_expect_success 'add one commit, write a merged graph' '
- test_commit 12 &&
- git branch commits/12 &&
-- git commit-graph write --reachable --split &&
-+ git commit-graph write --input=reachable --split &&
- test_path_is_file $graphdir/commit-graph-chain &&
- test_line_count = 2 $graphdir/commit-graph-chain &&
- ls $graphdir/graph-*.graph >graph-files &&
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'create fork and chain across alternate' '
- echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
- test_commit 13 &&
- git branch commits/13 &&
-- git commit-graph write --reachable --split &&
-+ git commit-graph write --input=reachable --split &&
- test_path_is_file $graphdir/commit-graph-chain &&
- test_line_count = 3 $graphdir/commit-graph-chain &&
- ls $graphdir/graph-*.graph >graph-files &&
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'create fork and chain across alternate' '
- git -c core.commitGraph=false rev-list HEAD >actual &&
- test_cmp expect actual &&
- test_commit 14 &&
-- git commit-graph write --reachable --split --object-dir=.git/objects/ &&
-+ git commit-graph write --input=reachable --split --object-dir=.git/objects/ &&
- test_line_count = 3 $graphdir/commit-graph-chain &&
- ls $graphdir/graph-*.graph >graph-files &&
- test_line_count = 1 graph-files
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'test merge stragety constants' '
- git config core.commitGraph true &&
- test_line_count = 2 $graphdir/commit-graph-chain &&
- test_commit 14 &&
-- git commit-graph write --reachable --split --size-multiple=2 &&
-+ git commit-graph write --input=reachable --split --size-multiple=2 &&
- test_line_count = 3 $graphdir/commit-graph-chain
-
- ) &&
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'test merge stragety constants' '
- git config core.commitGraph true &&
- test_line_count = 2 $graphdir/commit-graph-chain &&
- test_commit 14 &&
-- git commit-graph write --reachable --split --size-multiple=10 &&
-+ git commit-graph write --input=reachable --split --size-multiple=10 &&
- test_line_count = 1 $graphdir/commit-graph-chain &&
- ls $graphdir/graph-*.graph >graph-files &&
- test_line_count = 1 graph-files
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'test merge stragety constants' '
- git config core.commitGraph true &&
- test_line_count = 2 $graphdir/commit-graph-chain &&
- test_commit 15 &&
-- git commit-graph write --reachable --split --size-multiple=10 --expire-time=1980-01-01 &&
-+ git commit-graph write --input=reachable --split --size-multiple=10 --expire-time=1980-01-01 &&
- test_line_count = 1 $graphdir/commit-graph-chain &&
- ls $graphdir/graph-*.graph >graph-files &&
- test_line_count = 3 graph-files
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'test merge stragety constants' '
- test_line_count = 2 $graphdir/commit-graph-chain &&
- test_commit 16 &&
- test_commit 17 &&
-- git commit-graph write --reachable --split --max-commits=1 &&
-+ git commit-graph write --input=reachable --split --max-commits=1 &&
- test_line_count = 1 $graphdir/commit-graph-chain &&
- ls $graphdir/graph-*.graph >graph-files &&
- test_line_count = 1 graph-files
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'remove commit-graph-chain file after flattening' '
- (
- cd flatten &&
- test_line_count = 2 $graphdir/commit-graph-chain &&
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- test_path_is_missing $graphdir/commit-graph-chain &&
- ls $graphdir >graph-files &&
- test_line_count = 0 graph-files
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'verify across alternates' '
- echo "$altdir" >.git/objects/info/alternates &&
- git commit-graph verify --object-dir="$altdir/" &&
- test_commit extra &&
-- git commit-graph write --reachable --split &&
-+ git commit-graph write --input=reachable --split &&
- tip_file=$graphdir/graph-$(tail -n 1 $graphdir/commit-graph-chain).graph &&
- corrupt_file "$tip_file" 100 "\01" &&
- test_must_fail git commit-graph verify --shallow 2>test_err &&
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'add octopus merge' '
- git reset --hard commits/10 &&
- git merge commits/3 commits/4 &&
- git branch merge/octopus &&
-- git commit-graph write --reachable --split &&
-+ git commit-graph write --input=reachable --split &&
- git commit-graph verify --progress 2>err &&
- test_line_count = 3 err &&
- test_i18ngrep ! warning err &&
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'add octopus merge' '
- graph_git_behavior 'graph exists' merge/octopus commits/12
-
- test_expect_success 'split across alternate where alternate is not split' '
-- git commit-graph write --reachable &&
-+ git commit-graph write --input=reachable &&
- test_path_is_file .git/objects/info/commit-graph &&
- cp .git/objects/info/commit-graph . &&
- git clone --no-hardlinks . alt-split &&
-@@ t/t5324-split-commit-graph.sh: test_expect_success 'split across alternate where alternate is not split' '
- rm -f .git/objects/info/commit-graph &&
- echo "$(pwd)"/../.git/objects >.git/objects/info/alternates &&
- test_commit 18 &&
-- git commit-graph write --reachable --split &&
-+ git commit-graph write --input=reachable --split &&
- test_line_count = 1 $graphdir/commit-graph-chain
- ) &&
- test_cmp commit-graph .git/objects/info/commit-graph
-@@ t/t5324-split-commit-graph.sh: test_expect_success '--split=merge-all always merges incrementals' '
- git rev-list -3 HEAD~4 >a &&
- git rev-list -2 HEAD~2 >b &&
- git rev-list -2 HEAD >c &&
-- git commit-graph write --split=no-merge --stdin-commits <a &&
-- git commit-graph write --split=no-merge --stdin-commits <b &&
-+ git commit-graph write --split=no-merge --input=stdin-commits <a &&
-+ git commit-graph write --split=no-merge --input=stdin-commits <b &&
- test_line_count = 2 $graphdir/commit-graph-chain &&
-- git commit-graph write --split=merge-all --stdin-commits <c &&
-+ git commit-graph write --split=merge-all --input=stdin-commits <c &&
- test_line_count = 1 $graphdir/commit-graph-chain
- '
-
-@@ t/t5324-split-commit-graph.sh: test_expect_success '--split=no-merge always writes an incremental' '
- git reset --hard commits/2 &&
- git rev-list HEAD~1 >a &&
- git rev-list HEAD >b &&
-- git commit-graph write --split --stdin-commits <a &&
-- git commit-graph write --split=no-merge --stdin-commits <b &&
-+ git commit-graph write --split --input=stdin-commits <a &&
-+ git commit-graph write --split=no-merge --input=stdin-commits <b &&
- test_line_count = 2 $graphdir/commit-graph-chain
- '
-
3: a5d3367788 ! 3: 4c6425f0da builtin/commit-graph.c: support '--input=none'
@@ Metadata
## Commit message ##
builtin/commit-graph.c: support '--input=none' - In the previous commit, we introduced '--[no-]merge', and alluded to the
- fact that '--merge' would be useful for callers who wish to always
- trigger a merge of an incremental chain.
+ In the previous commit, we introduced '--split=<no-merge|merge-all>',
+ and alluded to the fact that '--split=merge-all' would be useful for
+ callers who wish to always trigger a merge of an incremental chain. There is a problem with the above approach, which is that there is no
way to specify to the commit-graph builtin that a caller only wants to
@@ Documentation/git-commit-graph.txt: COMMANDS
'write':: -Write a commit-graph file based on the commits found in packfiles.
-+Write a commit-graph file based on the commits specified:
-+* With the `--input=stdin-packs` option, generate the new commit graph
-+by walking objects only in the specified pack-indexes. (Cannot be
-+combined with `--input=stdin-commits` or `--input=reachable`.)
++Write a commit-graph file based on the specified sources of input:
+
--With the `--input=stdin-packs` option, generate the new commit graph by
--walking objects only in the specified pack-indexes. (Cannot be combined
--with `--input=stdin-commits` or `--input=reachable`.)
--+
--With the `--input=stdin-commits` option, generate the new commit graph
-+* With the `--input=stdin-commits` option, generate the new commit graph
- by walking commits starting at the commits specified in stdin as a list
- of OIDs in hex, one OID per line. (Cannot be combined with
- `--input=stdin-packs` or `--input=reachable`.)
- +
--With the `--input=reachable` option, generate the new commit graph by
-+* With the `--input=reachable` option, generate the new commit graph by
- walking commits starting at all refs. (Cannot be combined with
- `--input=stdin-commits` or `--input=stdin-packs`.)
- +
--With the `--input=append` option, include all commits that are present
-+* With the `--input=append` option, include all commits that are present
+ With the `--input=stdin-packs` option, generate the new commit graph by
+ walking objects only in the specified pack-indexes. (Cannot be combined
+@@ Documentation/git-commit-graph.txt: walking commits starting at all refs. (Cannot be combined with
+ With the `--input=append` option, include all commits that are present
in the existing commit-graph file.
+
-+* With the `--input=none` option, behave as if `input=append` were
++With the `--input=none` option, behave as if `--input=append` were
+given, but do not walk other packs to find additional commits.
+
-+If none of the above options are given, then commits found in
-+packfiles are specified.
++If none of the above options are given, then generate the new
++commit-graph by walking over all pack-indexes.
++
With the `--split[=<strategy>]` option, write the commit-graph as a
chain of multiple commit-graph files stored in
`<dir>/info/commit-graphs`. Commit-graph layers are merged based on the ## builtin/commit-graph.c ##
-@@
- static char const * const builtin_commit_graph_usage[] = {
+@@ builtin/commit-graph.c: static char const * const builtin_commit_graph_usage[] = {
N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]"),
- N_("git commit-graph write [--object-dir <objdir>] [--append] "
-- "[--split[=<strategy>]] [--input=<reachable|stdin-packs|stdin-commits>] "
-+ "[--split[=<strategy>]] "
-+ "[--input=<reachable|stdin-packs|stdin-commits|none>] "
+ N_("git commit-graph write [--object-dir <objdir>] "
+ "[--split[=<strategy>]] "
+- "[--input=<reachable|stdin-packs|stdin-commits|append>] "
++ "[--input=<reachable|stdin-packs|stdin-commits|append|none>] "
"[--[no-]progress] <split options>"),
NULL
};
@@ builtin/commit-graph.c: static const char * const builtin_commit_graph_verify_usage[] = {
-
static const char * const builtin_commit_graph_write_usage[] = {
- N_("git commit-graph write [--object-dir <objdir>] [--append] "
-- "[--split[=<strategy>]] [--input=<reachable|stdin-packs|stdin-commits>] "
-+ "[--split[=<strategy>]] "
-+ "[--input=<reachable|stdin-packs|stdin-commits|none>] "
+ N_("git commit-graph write [--object-dir <objdir>] "
+ "[--split[=<strategy>]] "
+- "[--input=<reachable|stdin-packs|stdin-commits|append>] "
++ "[--input=<reachable|stdin-packs|stdin-commits|append|none>] "
"[--[no-]progress] <split options>"),
NULL
};
--
2.25.0.119.gaa12b7378b