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checkout/__test__/verify-sparse-checkout-non-cone-mode.sh
Johannes Schindelin d106d4669b
Add support for sparse checkouts (#1369)
* Add support for sparse checkouts

* sparse-checkout: optionally turn off cone mode

While it _is_ true that cone mode is the default nowadays (mainly for
performance reasons: code mode is much faster than non-cone mode), there
_are_ legitimate use cases where non-cone mode is really useful.

Let's add a flag to optionally disable cone mode.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

* Verify minimum Git version for sparse checkout

The `git sparse-checkout` command is available only since Git version
v2.25.0. The `actions/checkout` Action actually supports older Git
versions than that; As of time of writing, the minimum version is
v2.18.0.

Instead of raising this minimum version even for users who do not
require a sparse checkout, only check for this minimum version
specifically when a sparse checkout was asked for.

Suggested-by: Tingluo Huang <tingluohuang@github.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

* Support sparse checkout/LFS better

Instead of fetching all the LFS objects present in the current revision
in a sparse checkout, whether they are needed inside the sparse cone or
not, let's instead only pull the ones that are actually needed.

To do that, let's avoid running that preemptive `git lfs fetch` call in
case of a sparse checkout.

An alternative that was considered during the development of this patch
(and ultimately rejected) was to use `git lfs pull --include <path>...`,
but it turned out to be too inflexible because it requires exact paths,
not the patterns that are available via the sparse checkout definition,
and that risks running into command-line length limitations.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

---------

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Co-authored-by: Daniel <daniel.fernandez@feverup.com>
2023-06-09 09:08:21 -04:00

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#!/bin/sh
# Verify .git folder
if [ ! -d "./sparse-checkout-non-cone-mode/.git" ]; then
echo "Expected ./sparse-checkout-non-cone-mode/.git folder to exist"
exit 1
fi
# Verify sparse-checkout (non-cone-mode)
cd sparse-checkout-non-cone-mode
ENABLED=$(git config --local --get-all core.sparseCheckout)
if [ "$?" != "0" ]; then
echo "Failed to verify that sparse-checkout is enabled"
exit 1
fi
# Check that sparse-checkout is enabled
if [ "$ENABLED" != "true" ]; then
echo "Expected sparse-checkout to be enabled (is: $ENABLED)"
exit 1
fi
SPARSE_CHECKOUT_FILE=$(git rev-parse --git-path info/sparse-checkout)
if [ "$?" != "0" ]; then
echo "Failed to validate sparse-checkout"
exit 1
fi
# Check that sparse-checkout list is not empty
if [ ! -f "$SPARSE_CHECKOUT_FILE" ]; then
echo "Expected sparse-checkout file to exist"
exit 1
fi
# Check that all folders from sparse-checkout exists
for pattern in $(cat "$SPARSE_CHECKOUT_FILE")
do
if [ ! -d "${pattern#/}" ]; then
echo "Expected directory '${pattern#/}' to exist"
exit 1
fi
done
# Verify that the root directory is not checked out
if [ -f README.md ]; then
echo "Expected top-level files not to exist"
exit 1
fi