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https://github.com/privatevoid-net/nix-super.git
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d88106df24
Instead of making a complete copy of the repo, fetching the submodules, and writing the result to the store (which is all superexpensive), we now fetch the submodules recursively using the Git fetcher, and return a union accessor that "mounts" the accessors for the submodules on top of the root accessor.
120 lines
5.1 KiB
Bash
120 lines
5.1 KiB
Bash
source common.sh
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set -u
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requireGit
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clearStore
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rootRepo=$TEST_ROOT/gitSubmodulesRoot
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subRepo=$TEST_ROOT/gitSubmodulesSub
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rm -rf ${rootRepo} ${subRepo} $TEST_HOME/.cache/nix
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# Submodules can't be fetched locally by default, which can cause
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# information leakage vulnerabilities, but for these tests our
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# submodule is intentionally local and it's all trusted, so we
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# disable this restriction. Setting it per repo is not sufficient, as
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# the repo-local config does not apply to the commands run from
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# outside the repos by Nix.
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export XDG_CONFIG_HOME=$TEST_HOME/.config
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git config --global protocol.file.allow always
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initGitRepo() {
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git init $1
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git -C $1 config user.email "foobar@example.com"
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git -C $1 config user.name "Foobar"
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}
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addGitContent() {
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echo "lorem ipsum" > $1/content
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git -C $1 add content
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git -C $1 commit -m "Initial commit"
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}
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initGitRepo $subRepo
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addGitContent $subRepo
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initGitRepo $rootRepo
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git -C $rootRepo submodule init
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git -C $rootRepo submodule add $subRepo sub
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git -C $rootRepo add sub
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git -C $rootRepo commit -m "Add submodule"
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rev=$(git -C $rootRepo rev-parse HEAD)
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r1=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; rev = \"$rev\"; }).outPath")
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r2=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; rev = \"$rev\"; submodules = false; }).outPath")
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r3=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; rev = \"$rev\"; submodules = true; }).outPath")
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[[ $r1 == $r2 ]]
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[[ $r2 != $r3 ]]
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r4=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; ref = \"master\"; rev = \"$rev\"; }).outPath")
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r5=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; ref = \"master\"; rev = \"$rev\"; submodules = false; }).outPath")
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r6=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; ref = \"master\"; rev = \"$rev\"; submodules = true; }).outPath")
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r7=$(nix eval --raw --expr "(builtins.fetchGit { url = $rootRepo; ref = \"master\"; rev = \"$rev\"; submodules = true; }).outPath")
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r8=$(nix eval --raw --expr "(builtins.fetchGit { url = $rootRepo; rev = \"$rev\"; submodules = true; }).outPath")
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[[ $r1 == $r4 ]]
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[[ $r4 == $r5 ]]
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[[ $r3 == $r6 ]]
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[[ $r6 == $r7 ]]
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[[ $r7 == $r8 ]]
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have_submodules=$(nix eval --expr "(builtins.fetchGit { url = $rootRepo; rev = \"$rev\"; }).submodules")
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[[ $have_submodules == false ]]
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have_submodules=$(nix eval --expr "(builtins.fetchGit { url = $rootRepo; rev = \"$rev\"; submodules = false; }).submodules")
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[[ $have_submodules == false ]]
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have_submodules=$(nix eval --expr "(builtins.fetchGit { url = $rootRepo; rev = \"$rev\"; submodules = true; }).submodules")
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[[ $have_submodules == true ]]
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pathWithoutSubmodules=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; rev = \"$rev\"; }).outPath")
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pathWithSubmodules=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; rev = \"$rev\"; submodules = true; }).outPath")
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pathWithSubmodulesAgain=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; rev = \"$rev\"; submodules = true; }).outPath")
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pathWithSubmodulesAgainWithRef=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; ref = \"master\"; rev = \"$rev\"; submodules = true; }).outPath")
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# The resulting store path cannot be the same.
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[[ $pathWithoutSubmodules != $pathWithSubmodules ]]
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# Checking out the same repo with submodules returns in the same store path.
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[[ $pathWithSubmodules == $pathWithSubmodulesAgain ]]
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# Checking out the same repo with submodules returns in the same store path.
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[[ $pathWithSubmodulesAgain == $pathWithSubmodulesAgainWithRef ]]
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# The submodules flag is actually honored.
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[[ ! -e $pathWithoutSubmodules/sub/content ]]
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[[ -e $pathWithSubmodules/sub/content ]]
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[[ -e $pathWithSubmodulesAgainWithRef/sub/content ]]
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# No .git directory or submodule reference files must be left
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test "$(find "$pathWithSubmodules" -name .git)" = ""
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# Git repos without submodules can be fetched with submodules = true.
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subRev=$(git -C $subRepo rev-parse HEAD)
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noSubmoduleRepoBaseline=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$subRepo; rev = \"$subRev\"; }).outPath")
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noSubmoduleRepo=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$subRepo; rev = \"$subRev\"; submodules = true; }).outPath")
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[[ $noSubmoduleRepoBaseline == $noSubmoduleRepo ]]
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# Test relative submodule URLs.
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rm $TEST_HOME/.cache/nix/fetcher-cache*
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rm -rf $rootRepo/.git $rootRepo/.gitmodules $rootRepo/sub
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initGitRepo $rootRepo
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git -C $rootRepo submodule add ../gitSubmodulesSub sub
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git -C $rootRepo commit -m "Add submodule"
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rev2=$(git -C $rootRepo rev-parse HEAD)
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pathWithRelative=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$rootRepo; rev = \"$rev2\"; submodules = true; }).outPath")
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diff -r -x .gitmodules $pathWithSubmodules $pathWithRelative
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# Test clones that have an upstream with relative submodule URLs.
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rm $TEST_HOME/.cache/nix/fetcher-cache*
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cloneRepo=$TEST_ROOT/a/b/gitSubmodulesClone # NB /a/b to make the relative path not work relative to $cloneRepo
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git clone $rootRepo $cloneRepo
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pathIndirect=$(nix eval --raw --expr "(builtins.fetchGit { url = file://$cloneRepo; rev = \"$rev2\"; submodules = true; }).outPath")
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[[ $pathIndirect = $pathWithRelative ]]
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