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clone: add --shallow-submodules flag
When creating a shallow clone of a repository with submodules, the depth argument does not influence the submodules, i.e. the submodules are done as non-shallow clones. It is unclear what the best default is for the depth of submodules of a shallow clone, so we need to have the possibility to do all kinds of combinations: * shallow super project with shallow submodules e.g. build bots starting always from scratch. They want to transmit the least amount of network data as well as using the least amount of space on their hard drive. * shallow super project with unshallow submodules e.g. The superproject is just there to track a collection of repositories and it is not important to have the relationship between the repositories intact. However the history of the individual submodules matter. * unshallow super project with shallow submodules e.g. The superproject is the actual project and the submodule is a library which is rarely touched. The new switch to select submodules to be shallow or unshallow supports all of these three cases. It is easy to transition from the first to the second case by just unshallowing the submodules (`git submodule foreach git fetch --unshallow`), but it is not possible to transition from the second to the first case (as we would have already transmitted the non shallow over the network). That is why we want to make the first case the default in case of a shallow super project. This leads to the inconvenience in the second case with the shallow super project and unshallow submodules, as you need to pass `--no-shallow-submodules`. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Stefan Beller
Junio C Hamano
parent
72290d6a1d
commit
d22eb04475
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@ -14,8 +14,8 @@ SYNOPSIS
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[-o <name>] [-b <name>] [-u <upload-pack>] [--reference <repository>]
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[--dissociate] [--separate-git-dir <git dir>]
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[--depth <depth>] [--[no-]single-branch]
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[--recursive | --recurse-submodules] [--jobs <n>] [--] <repository>
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[<directory>]
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[--recursive | --recurse-submodules] [--[no-]shallow-submodules]
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[--jobs <n>] [--] <repository> [<directory>]
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DESCRIPTION
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-----------
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@ -190,7 +190,11 @@ objects from the source repository into a pack in the cloned repository.
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--depth <depth>::
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Create a 'shallow' clone with a history truncated to the
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specified number of revisions.
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specified number of revisions. Implies `--single-branch` unless
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`--no-single-branch` is given to fetch the histories near the
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tips of all branches. This implies `--shallow-submodules`. If
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you want to have a shallow superproject clone, but full submodules,
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also pass `--no-shallow-submodules`.
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--[no-]single-branch::
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Clone only the history leading to the tip of a single branch,
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@ -214,6 +218,9 @@ objects from the source repository into a pack in the cloned repository.
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repository does not have a worktree/checkout (i.e. if any of
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`--no-checkout`/`-n`, `--bare`, or `--mirror` is given)
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--[no-]shallow-submodules::
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All submodules which are cloned will be shallow with a depth of 1.
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--separate-git-dir=<git dir>::
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Instead of placing the cloned repository where it is supposed
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to be, place the cloned repository at the specified directory,
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@ -40,6 +40,7 @@ static const char * const builtin_clone_usage[] = {
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static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1;
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static int option_local = -1, option_no_hardlinks, option_shared, option_recursive;
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static int option_shallow_submodules = -1;
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static char *option_template, *option_depth;
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static char *option_origin = NULL;
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static char *option_branch = NULL;
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@ -91,6 +92,8 @@ static struct option builtin_clone_options[] = {
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N_("create a shallow clone of that depth")),
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OPT_BOOL(0, "single-branch", &option_single_branch,
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N_("clone only one branch, HEAD or --branch")),
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OPT_BOOL(0, "shallow-submodules", &option_shallow_submodules,
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N_("any cloned submodules will be shallow")),
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OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
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N_("separate git dir from working tree")),
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OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
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@ -727,6 +730,10 @@ static int checkout(void)
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struct argv_array args = ARGV_ARRAY_INIT;
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argv_array_pushl(&args, "submodule", "update", "--init", "--recursive", NULL);
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if (option_shallow_submodules == 1
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|| (option_shallow_submodules == -1 && option_depth))
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argv_array_push(&args, "--depth=1");
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if (max_jobs != -1)
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argv_array_pushf(&args, "--jobs=%d", max_jobs);
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85
t/t5614-clone-submodules.sh
Executable file
85
t/t5614-clone-submodules.sh
Executable file
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@ -0,0 +1,85 @@
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#!/bin/sh
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test_description='Test shallow cloning of repos with submodules'
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. ./test-lib.sh
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pwd=$(pwd)
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test_expect_success 'setup' '
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git checkout -b master &&
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test_commit commit1 &&
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test_commit commit2 &&
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mkdir sub &&
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(
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cd sub &&
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git init &&
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test_commit subcommit1 &&
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test_commit subcommit2 &&
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test_commit subcommit3
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) &&
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git submodule add "file://$pwd/sub" sub &&
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git commit -m "add submodule"
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'
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test_expect_success 'nonshallow clone implies nonshallow submodule' '
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test_when_finished "rm -rf super_clone" &&
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git clone --recurse-submodules "file://$pwd/." super_clone &&
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(
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cd super_clone &&
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git log --oneline >lines &&
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test_line_count = 3 lines
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) &&
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(
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cd super_clone/sub &&
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git log --oneline >lines &&
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test_line_count = 3 lines
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)
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'
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test_expect_success 'shallow clone implies shallow submodule' '
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test_when_finished "rm -rf super_clone" &&
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git clone --recurse-submodules --depth 2 "file://$pwd/." super_clone &&
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(
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cd super_clone &&
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git log --oneline >lines &&
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test_line_count = 2 lines
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) &&
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(
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cd super_clone/sub &&
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git log --oneline >lines &&
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test_line_count = 1 lines
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)
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'
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test_expect_success 'shallow clone with non shallow submodule' '
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test_when_finished "rm -rf super_clone" &&
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git clone --recurse-submodules --depth 2 --no-shallow-submodules "file://$pwd/." super_clone &&
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(
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cd super_clone &&
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git log --oneline >lines &&
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test_line_count = 2 lines
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) &&
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(
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cd super_clone/sub &&
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git log --oneline >lines &&
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test_line_count = 3 lines
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)
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'
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test_expect_success 'non shallow clone with shallow submodule' '
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test_when_finished "rm -rf super_clone" &&
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git clone --recurse-submodules --no-local --shallow-submodules "file://$pwd/." super_clone &&
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(
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cd super_clone &&
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git log --oneline >lines &&
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test_line_count = 3 lines
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) &&
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(
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cd super_clone/sub &&
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git log --oneline >lines &&
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test_line_count = 1 lines
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)
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'
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test_done
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