462421d345
This provides a pluggable mechanism for defining new fetchers. It adds
a builtin function 'fetchTree' that generalizes existing fetchers like
'fetchGit', 'fetchMercurial' and 'fetchTarball'. 'fetchTree' takes a
set of attributes, e.g.
fetchTree {
type = "git";
url = "https://example.org/repo.git";
ref = "some-branch";
rev = "abcdef...";
}
The existing fetchers are just wrappers around this. Note that the
input attributes to fetchTree are the same as flake input
specifications and flake lock file entries.
All fetchers share a common cache stored in
~/.cache/nix/fetcher-cache-v1.sqlite. This replaces the ad hoc caching
mechanisms in fetchGit and download.cc (e.g. ~/.cache/nix/{tarballs,git-revs*}).
This also adds support for Git worktrees (c169ea5904).
160 lines
5.5 KiB
Bash
160 lines
5.5 KiB
Bash
source common.sh
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if [[ -z $(type -p git) ]]; then
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echo "Git not installed; skipping Git tests"
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exit 99
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fi
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clearStore
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repo=$TEST_ROOT/git
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export _NIX_FORCE_HTTP=1
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rm -rf $repo ${repo}-tmp $TEST_HOME/.cache/nix $TEST_ROOT/worktree $TEST_ROOT/shallow
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git init $repo
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git -C $repo config user.email "foobar@example.com"
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git -C $repo config user.name "Foobar"
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echo utrecht > $repo/hello
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touch $repo/.gitignore
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git -C $repo add hello .gitignore
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git -C $repo commit -m 'Bla1'
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rev1=$(git -C $repo rev-parse HEAD)
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echo world > $repo/hello
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git -C $repo commit -m 'Bla2' -a
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git -C $repo worktree add $TEST_ROOT/worktree
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echo hello >> $TEST_ROOT/worktree/hello
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rev2=$(git -C $repo rev-parse HEAD)
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# Fetch a worktree
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unset _NIX_FORCE_HTTP
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path0=$(nix eval --raw "(builtins.fetchGit file://$TEST_ROOT/worktree).outPath")
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export _NIX_FORCE_HTTP=1
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[[ $(tail -n 1 $path0/hello) = "hello" ]]
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# Fetch the default branch.
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path=$(nix eval --raw "(builtins.fetchGit file://$repo).outPath")
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[[ $(cat $path/hello) = world ]]
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# In pure eval mode, fetchGit without a revision should fail.
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[[ $(nix eval --raw "(builtins.readFile (fetchGit file://$repo + \"/hello\"))") = world ]]
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(! nix eval --pure-eval --raw "(builtins.readFile (fetchGit file://$repo + \"/hello\"))")
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# Fetch using an explicit revision hash.
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path2=$(nix eval --raw "(builtins.fetchGit { url = file://$repo; rev = \"$rev2\"; }).outPath")
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[[ $path = $path2 ]]
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# In pure eval mode, fetchGit with a revision should succeed.
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[[ $(nix eval --pure-eval --raw "(builtins.readFile (fetchGit { url = file://$repo; rev = \"$rev2\"; } + \"/hello\"))") = world ]]
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# Fetch again. This should be cached.
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mv $repo ${repo}-tmp
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path2=$(nix eval --raw "(builtins.fetchGit file://$repo).outPath")
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[[ $path = $path2 ]]
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[[ $(nix eval "(builtins.fetchGit file://$repo).revCount") = 2 ]]
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[[ $(nix eval --raw "(builtins.fetchGit file://$repo).rev") = $rev2 ]]
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# Fetching with a explicit hash should succeed.
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path2=$(nix eval --tarball-ttl 0 --raw "(builtins.fetchGit { url = file://$repo; rev = \"$rev2\"; }).outPath")
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[[ $path = $path2 ]]
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path2=$(nix eval --tarball-ttl 0 --raw "(builtins.fetchGit { url = file://$repo; rev = \"$rev1\"; }).outPath")
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[[ $(cat $path2/hello) = utrecht ]]
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mv ${repo}-tmp $repo
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# Using a clean working tree should produce the same result.
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path2=$(nix eval --raw "(builtins.fetchGit $repo).outPath")
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[[ $path = $path2 ]]
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# Using an unclean tree should yield the tracked but uncommitted changes.
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mkdir $repo/dir1 $repo/dir2
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echo foo > $repo/dir1/foo
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echo bar > $repo/bar
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echo bar > $repo/dir2/bar
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git -C $repo add dir1/foo
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git -C $repo rm hello
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unset _NIX_FORCE_HTTP
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path2=$(nix eval --raw "(builtins.fetchGit $repo).outPath")
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[ ! -e $path2/hello ]
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[ ! -e $path2/bar ]
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[ ! -e $path2/dir2/bar ]
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[ ! -e $path2/.git ]
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[[ $(cat $path2/dir1/foo) = foo ]]
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[[ $(nix eval --raw "(builtins.fetchGit $repo).rev") = 0000000000000000000000000000000000000000 ]]
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# ... unless we're using an explicit ref or rev.
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path3=$(nix eval --raw "(builtins.fetchGit { url = $repo; ref = \"master\"; }).outPath")
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[[ $path = $path3 ]]
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path3=$(nix eval --raw "(builtins.fetchGit { url = $repo; rev = \"$rev2\"; }).outPath")
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[[ $path = $path3 ]]
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# Committing should not affect the store path.
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git -C $repo commit -m 'Bla3' -a
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path4=$(nix eval --tarball-ttl 0 --raw "(builtins.fetchGit file://$repo).outPath")
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[[ $path2 = $path4 ]]
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# tarball-ttl should be ignored if we specify a rev
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echo delft > $repo/hello
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git -C $repo add hello
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git -C $repo commit -m 'Bla4'
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rev3=$(git -C $repo rev-parse HEAD)
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nix eval --tarball-ttl 3600 "(builtins.fetchGit { url = $repo; rev = \"$rev3\"; })" >/dev/null
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# Update 'path' to reflect latest master
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path=$(nix eval --raw "(builtins.fetchGit file://$repo).outPath")
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# Check behavior when non-master branch is used
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git -C $repo checkout $rev2 -b dev
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echo dev > $repo/hello
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# File URI uses dirty tree unless specified otherwise
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path2=$(nix eval --raw "(builtins.fetchGit file://$repo).outPath")
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[ $(cat $path2/hello) = dev ]
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# Using local path with branch other than 'master' should work when clean or dirty
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path3=$(nix eval --raw "(builtins.fetchGit $repo).outPath")
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# (check dirty-tree handling was used)
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[[ $(nix eval --raw "(builtins.fetchGit $repo).rev") = 0000000000000000000000000000000000000000 ]]
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# Committing shouldn't change store path, or switch to using 'master'
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git -C $repo commit -m 'Bla5' -a
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path4=$(nix eval --raw "(builtins.fetchGit $repo).outPath")
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[[ $(cat $path4/hello) = dev ]]
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[[ $path3 = $path4 ]]
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# Confirm same as 'dev' branch
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path5=$(nix eval --raw "(builtins.fetchGit { url = $repo; ref = \"dev\"; }).outPath")
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[[ $path3 = $path5 ]]
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# Nuke the cache
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rm -rf $TEST_HOME/.cache/nix
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# Try again, but without 'git' on PATH. This should fail.
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NIX=$(command -v nix)
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# This should fail
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(! PATH= $NIX eval --raw "(builtins.fetchGit { url = $repo; ref = \"dev\"; }).outPath" )
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# Try again, with 'git' available. This should work.
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path5=$(nix eval --raw "(builtins.fetchGit { url = $repo; ref = \"dev\"; }).outPath")
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[[ $path3 = $path5 ]]
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# Fetching a shallow repo shouldn't work by default, because we can't
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# return a revCount.
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git clone --depth 1 file://$repo $TEST_ROOT/shallow
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(! nix eval --raw "(builtins.fetchGit { url = $TEST_ROOT/shallow; ref = \"dev\"; }).outPath")
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# But you can request a shallow clone, which won't return a revCount.
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path6=$(nix eval --raw "(builtins.fetchTree { type = \"git\"; url = \"file://$TEST_ROOT/shallow\"; ref = \"dev\"; shallow = true; }).outPath")
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[[ $path3 = $path6 ]]
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[[ $(nix eval "(builtins.fetchTree { type = \"git\"; url = \"file://$TEST_ROOT/shallow\"; ref = \"dev\"; shallow = true; }).revCount or 123") == 123 ]]
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