mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-25 03:17:13 +00:00
19d3cf81d3
We need to make sure that `$revs` ends with a space, since files must always end with newlines. The previous code ignored the last entry in `$revs`, because read already returns non-zero exit code for the last entry, as it does not end with a space.
210 lines
7.1 KiB
Plaintext
Executable file
210 lines
7.1 KiB
Plaintext
Executable file
# copied from libgit2 source code 'repo-template.h'
|
|
makeGitTemplate() {
|
|
local target="$1"
|
|
mkdir -p -m777 "$target/info" "$target/pack" "$target/objects" "$target/refs"
|
|
mkdir -p -m777 "$target/refs/heads" "$target/refs/tags" "$target/objects/info" "$target/objects/pack"
|
|
cat <<'EOF' > "$target/description"
|
|
Unnamed repository; edit this file 'description' to name the repository.
|
|
EOF
|
|
chmod 666 "$target/description"
|
|
cat <<'EOF' > "$target/info/exclude"
|
|
# File patterns to ignore; see `git help ignore` for more information.
|
|
# Lines that start with '#' are comments.
|
|
EOF
|
|
}
|
|
|
|
fetchCargoDeps() {
|
|
src=$(realpath $1)
|
|
out=$(realpath $2)
|
|
|
|
echo "Fetching $src to $out"
|
|
|
|
mkdir $out
|
|
|
|
# Configure git template dir to make libgit2 more deterministic
|
|
#
|
|
# Without a template dir, libgit2 defaults to /usr/share/git-core/templates,
|
|
# which can vary between systems if sandboxed builds aren't used.
|
|
#
|
|
# Note: we explictly set --tmpdir for mktemp here to make it more friendly
|
|
# for nix-shell users, where $TMPDIR is not necessarily set to NIX_BUILD_TOP
|
|
echo "Setting up git templatedir"
|
|
export GIT_TEMPLATE_DIR="$(mktemp -d --tmpdir=$NIX_BUILD_TOP git-template.XXX)"
|
|
makeGitTemplate "$GIT_TEMPLATE_DIR"
|
|
export XDG_CONFIG_HOME="$(mktemp -d --tmpdir=$NIX_BUILD_TOP home.XXX)"
|
|
mkdir -p $XDG_CONFIG_HOME/git
|
|
cat <<EOF > $XDG_CONFIG_HOME/git/config
|
|
[init]
|
|
templatedir = $GIT_TEMPLATE_DIR
|
|
EOF
|
|
|
|
# Configure cargo to fetch from a local copy of the crates.io registry
|
|
|
|
echo "Using rust registry from $rustRegistry"
|
|
|
|
cat <<EOF > $out/config
|
|
[registry]
|
|
index = "file://$rustRegistry"
|
|
EOF
|
|
|
|
export CARGO_HOME=$out
|
|
cd $src
|
|
|
|
if [[ ! -f Cargo.lock ]]; then
|
|
echo
|
|
echo "ERROR: The Cargo.lock file doesn't exist"
|
|
echo
|
|
echo "Cargo.lock is needed to make sure that depsSha256 doesn't change"
|
|
echo "when the registry is updated."
|
|
echo
|
|
|
|
exit 1
|
|
fi
|
|
|
|
# We need to do the following string replacement so that 'cargo fetch'
|
|
# doesn't ignore the versions specified in Cargo.lock
|
|
substituteInPlace Cargo.lock \
|
|
--replace "registry+https://github.com/rust-lang/crates.io-index" \
|
|
"registry+file://$rustRegistry"
|
|
|
|
# Do any possible 'cargo update -p <pkgName> --precise <version>' ad-hoc updates
|
|
eval "$cargoUpdateHook"
|
|
|
|
# Do the fetch
|
|
cargo fetch --verbose
|
|
|
|
# Now that we have fetched everything, let's make the output deterministic
|
|
|
|
# Cargo uses the following directory structure for fetched data, where
|
|
# $indexHash is a hash of the registry index URL:
|
|
#
|
|
#
|
|
# /config:
|
|
#
|
|
# Cargo config file. We'll delete this because it's not deterministic,
|
|
# and instead recreate it just before running 'cargo build'.
|
|
#
|
|
# /registry/cache/$indexHash/:
|
|
#
|
|
# This is where tarballs of registry package dependencies are kept
|
|
# We'll need to keep this, but make sure $indexHash is a fixed name.
|
|
#
|
|
# /registry/index/$indexHash/:
|
|
#
|
|
# A copy of the registry index is kept here. We can delete this, and
|
|
# instead, just before running 'cargo build', we'll symlink this
|
|
# directory to our static copy of the registry in the Nix store.
|
|
#
|
|
# /registry/src/$indexHash/{pkgName-pkgVersion}/:
|
|
#
|
|
# Here cargo keeps extracted sources of the cached tarballs.
|
|
# We'll just delete this because cargo will re-populate them from the
|
|
# tarballs.
|
|
#
|
|
# /git/db/{domain-hash}/:
|
|
#
|
|
# Here cargo keeps the `.git` directories of git dependencies.
|
|
# We'll need to keep these, but make them deterministic.
|
|
#
|
|
# /git/checkouts/{domain-hash}/{branchName}/:
|
|
#
|
|
# Here cargo keeps checked-out sources of the git dependencies.
|
|
# We can delete this, because cargo will re-populate them from the above
|
|
# `.git` directories.
|
|
#
|
|
# Let's start
|
|
|
|
# Remove cargo config file, which points to the ever-changing registry
|
|
rm $out/config
|
|
|
|
# Save the Cargo.lock file into the output, so that we don't have to do another
|
|
# 'cargo update' during the build (which would try to access the network) for
|
|
# any ad-hoc package updates (through $cargoUpdateHook).
|
|
#
|
|
# We need to replace the rustRegistry URL with something deterministic.
|
|
# Since the URL won't actually be accessed anymore, it's fine to use /dev/null.
|
|
|
|
substituteInPlace Cargo.lock \
|
|
--replace "registry+file://$rustRegistry" \
|
|
"registry+file:///dev/null"
|
|
mv Cargo.lock $out/
|
|
|
|
|
|
# Let's replace $indexHash with something more deterministic
|
|
mv $out/registry/cache/* $out/registry/cache/HASH
|
|
|
|
# The registry index changes all the time, so it's not deterministic
|
|
# We'll symlink it before running 'cargo build'
|
|
rm -rf $out/registry/index/*
|
|
|
|
# Make git DBs deterministic
|
|
# TODO: test with git submodules
|
|
[[ ! -d $out/git/checkouts ]] || (cd $out/git/checkouts && for name in *; do
|
|
revs=""
|
|
cd "$out/git/checkouts/$name"
|
|
while read dir; do
|
|
# extract substring: [dir = "./xxx/yyy/.git"] => [branch = "xxx/yyy"]
|
|
branch="${dir:2:$((${#dir}-7))}"
|
|
|
|
cd "$out/git/checkouts/$name/$branch"
|
|
rev="$(git rev-parse HEAD)"
|
|
revs="$rev $revs"
|
|
done < <(find . -type d -name .git -print)
|
|
|
|
echo "List of revs to keep for git db $name: $revs"
|
|
|
|
(
|
|
# The following code was adapted from nix-prefetch-git
|
|
|
|
cd "$out/git/db/$name"
|
|
|
|
export GIT_DIR=.
|
|
|
|
# Remove all remote branches
|
|
git branch -r | while read branch; do
|
|
git branch -rD "$branch" >&2
|
|
done
|
|
|
|
# Remove all tags
|
|
git tag | while read tag; do
|
|
git tag -d "$tag" >&2
|
|
done
|
|
|
|
# Remove all local branches
|
|
branchrefs=()
|
|
eval "$(git for-each-ref --shell --format='branchrefs+=(%(refname))' refs/heads/)"
|
|
|
|
for branchref in "${branchrefs[@]}"; do
|
|
git update-ref -d "$branchref" >&2
|
|
done
|
|
|
|
# Create ad-hoc branches for the revs we need
|
|
echo "$revs" | while read -d " " rev; do
|
|
echo "Creating git branch b_$rev $rev"
|
|
git branch b_$rev $rev
|
|
done
|
|
|
|
# Remove files that have timestamps or otherwise have non-deterministic
|
|
# properties.
|
|
rm -rf logs/ hooks/ index FETCH_HEAD ORIG_HEAD refs/remotes/origin/HEAD config
|
|
|
|
# Do a full repack. Must run single-threaded, or else we lose determinism.
|
|
git config pack.threads 1
|
|
git repack -A -d -f
|
|
rm -f config
|
|
|
|
# Garbage collect unreferenced objects.
|
|
git gc --prune=all
|
|
)
|
|
done)
|
|
|
|
# Remove unneeded outputs
|
|
[[ ! -d $out/registry/src ]] || rm -rf $out/registry/src
|
|
[[ ! -d $out/git/checkouts ]] || rm -rf $out/git/checkouts
|
|
|
|
# XXX: provide some debugging output to see find out why we are seeing
|
|
# sporadic hash mismatches
|
|
find $out ! -type f
|
|
find $out -type f -exec sha256sum {} +
|
|
}
|