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|
{ lib
, writeShellApplication
, coreutils
, git
, nix
, common-updater-scripts
}:
# This is an updater for unstable packages that should always use the latest
# commit.
{ url ? null # The git url, if empty it will be set to src.gitRepoUrl
, branch ? null
, hardcodeZeroVersion ? false # Use a made-up version "0" instead of latest tag. Use when there is no previous release, or the project's tagging system is incompatible with what we expect from versions
, tagFormat ? "*" # A `git describe --tags --match '<format>'` pattern that tags must match to be considered
, tagPrefix ? null # strip this prefix from a tag name
, tagConverter ? null # A command to convert more complex tag formats. It receives the git tag via stdin and should convert it into x.y.z format to stdout
, shallowClone ? true
}:
assert lib.asserts.assertMsg (tagPrefix == null || tagConverter == null) "Can only use either tagPrefix or tagConverter!";
let
updateScript = writeShellApplication {
name = "unstable-update-script";
runtimeInputs = [
common-updater-scripts
coreutils
git
nix
];
text = ''
set -ex
url=""
branch=""
hardcode_zero_version=""
tag_format=""
tag_prefix=""
tag_converter=""
shallow_clone=""
: "''${systemArg:=}"
while (( $# > 0 )); do
flag="$1"
shift 1
case "$flag" in
--url=*)
url="''${flag#*=}"
;;
--branch=*)
branch="''${flag#*=}"
;;
--hardcode-zero-version)
hardcode_zero_version=1
;;
--tag-format=*)
tag_format="''${flag#*=}"
;;
--tag-prefix=*)
tag_prefix="''${flag#*=}"
;;
--tag-converter=*)
tag_converter="''${flag#*=}"
;;
--shallow-clone)
shallow_clone=1
;;
*)
echo "$0: unknown option ‘''${flag}’"
exit 1
;;
esac
done
# By default we set url to src.gitRepoUrl
if [[ -z "$url" ]]; then
# system argument cannot be passed as 1 argument
# shellcheck disable=SC2086
url="$(nix-instantiate $systemArg --eval -E \
"with import ./. {}; $UPDATE_NIX_ATTR_PATH.src.gitRepoUrl" \
| tr -d '"')"
fi
# Get info about HEAD from a shallow git clone
tmpdir="$(mktemp -d)"
cloneArgs=()
if [[ "$shallow_clone" == "1" ]]; then
cloneArgs+=(--depth=1)
fi
if [[ -n "$branch" ]]; then
cloneArgs+=(--branch="$branch")
fi
git clone "''${cloneArgs[@]}" "$url" "$tmpdir"
getLatestVersion() {
git describe --tags --abbrev=0 --match "''${tag_format}" 2> /dev/null || true
}
pushd "$tmpdir"
commit_date="$(git show -s --pretty='format:%cs')"
commit_sha="$(git show -s --pretty='format:%H')"
last_tag=""
if [[ -z "$hardcode_zero_version" ]]; then
if [[ "$shallow_clone" == "1" ]]; then
depth=100
while (( depth < 10000 )); do
last_tag="$(getLatestVersion)"
if [[ -n "$last_tag" ]]; then
break
fi
git fetch --depth="$depth" --tags
depth=$(( depth * 2 ))
done
if [[ -z "$last_tag" ]]; then
# To be extra sure, check if full history helps with finding a tag
git fetch --tags
last_tag="$(getLatestVersion)"
fi
else
last_tag="$(getLatestVersion)"
fi
if [[ -z "$last_tag" ]]; then
last_tag="0"
fi
if [[ -n "$tag_prefix" ]]; then
echo "Stripping prefix '$tag_prefix' from tag '$last_tag'"
last_tag="''${last_tag#"''${tag_prefix}"}"
fi
if [[ -n "$tag_converter" ]]; then
echo "Running '$last_tag' through: $tag_converter"
last_tag="$(echo "''${last_tag}" | ''${tag_converter})"
fi
else
last_tag="0"
fi
if [[ ! "$last_tag" =~ ^[[:digit:]] ]]; then
echo "Last tag '$last_tag' does not start with a digit" > /dev/stderr
exit 1
fi
new_version="$last_tag-unstable-$commit_date"
popd
# rm -rf "$tmpdir"
# update the nix expression
update-source-version \
"$UPDATE_NIX_ATTR_PATH" \
"$new_version" \
--rev="$commit_sha"
'';
};
in
[
(lib.getExe updateScript)
"--url=${builtins.toString url}"
"--tag-format=${tagFormat}"
] ++ lib.optionals (branch != null) [
"--branch=${branch}"
] ++ lib.optionals (tagPrefix != null) [
"--tag-prefix=${tagPrefix}"
] ++ lib.optionals (tagConverter != null) [
"--tag-converter=${tagConverter}"
] ++ lib.optionals hardcodeZeroVersion [
"--hardcode-zero-version"
] ++ lib.optionals shallowClone [
"--shallow-clone"
]
|
