111 lines
3.8 KiB
Nix
111 lines
3.8 KiB
Nix
{lib, stdenvNoCC, git, git-lfs, cacert}: let
|
|
urlToName = url: rev: let
|
|
inherit (lib) removeSuffix splitString last;
|
|
base = last (splitString ":" (baseNameOf (removeSuffix "/" url)));
|
|
|
|
matched = builtins.match "(.*)\\.git" base;
|
|
|
|
short = builtins.substring 0 7 rev;
|
|
|
|
appendShort = lib.optionalString ((builtins.match "[a-f0-9]*" rev) != null) "-${short}";
|
|
in "${if matched == null then base else builtins.head matched}${appendShort}";
|
|
in
|
|
lib.makeOverridable (
|
|
{ url, rev ? "HEAD", md5 ? "", sha256 ? "", hash ? "", leaveDotGit ? deepClone
|
|
, fetchSubmodules ? true, deepClone ? false
|
|
, branchName ? null
|
|
, sparseCheckout ? []
|
|
, nonConeMode ? false
|
|
, name ? urlToName url rev
|
|
, # Shell code executed after the file has been fetched
|
|
# successfully. This can do things like check or transform the file.
|
|
postFetch ? ""
|
|
, preferLocalBuild ? true
|
|
, fetchLFS ? false
|
|
, # Shell code to build a netrc file for BASIC auth
|
|
netrcPhase ? null
|
|
, # Impure env vars (https://nixos.org/nix/manual/#sec-advanced-attributes)
|
|
# needed for netrcPhase
|
|
netrcImpureEnvVars ? []
|
|
, meta ? {}
|
|
, allowedRequisites ? null
|
|
}:
|
|
|
|
/* NOTE:
|
|
fetchgit has one problem: git fetch only works for refs.
|
|
This is because fetching arbitrary (maybe dangling) commits creates garbage collection risks
|
|
and checking whether a commit belongs to a ref is expensive. This may
|
|
change in the future when some caching is added to git (?)
|
|
Usually refs are either tags (refs/tags/*) or branches (refs/heads/*)
|
|
Cloning branches will make the hash check fail when there is an update.
|
|
But not all patches we want can be accessed by tags.
|
|
|
|
The workaround is getting the last n commits so that it's likely that they
|
|
still contain the hash we want.
|
|
|
|
for now : increase depth iteratively (TODO)
|
|
|
|
real fix: ask git folks to add a
|
|
git fetch $HASH contained in $BRANCH
|
|
facility because checking that $HASH is contained in $BRANCH is less
|
|
expensive than fetching --depth $N.
|
|
Even if git folks implemented this feature soon it may take years until
|
|
server admins start using the new version?
|
|
*/
|
|
|
|
assert deepClone -> leaveDotGit;
|
|
assert nonConeMode -> !(sparseCheckout == "" || sparseCheckout == []);
|
|
|
|
if md5 != "" then
|
|
throw "fetchgit does not support md5 anymore, please use sha256"
|
|
else if hash != "" && sha256 != "" then
|
|
throw "Only one of sha256 or hash can be set"
|
|
else
|
|
# Added 2022-11-12
|
|
lib.warnIf (builtins.isString sparseCheckout)
|
|
"Please provide directories/patterns for sparse checkout as a list of strings. Support for passing a (multi-line) string is deprecated and will be removed in the next release."
|
|
stdenvNoCC.mkDerivation {
|
|
inherit name;
|
|
builder = ./builder.sh;
|
|
fetcher = ./nix-prefetch-git;
|
|
|
|
nativeBuildInputs = [ git ]
|
|
++ lib.optionals fetchLFS [ git-lfs ];
|
|
|
|
outputHashAlgo = if hash != "" then null else "sha256";
|
|
outputHashMode = "recursive";
|
|
outputHash = if hash != "" then
|
|
hash
|
|
else if sha256 != "" then
|
|
sha256
|
|
else
|
|
lib.fakeSha256;
|
|
|
|
# git-sparse-checkout(1) says:
|
|
# > When the --stdin option is provided, the directories or patterns are read
|
|
# > from standard in as a newline-delimited list instead of from the arguments.
|
|
sparseCheckout = if builtins.isString sparseCheckout then sparseCheckout else builtins.concatStringsSep "\n" sparseCheckout;
|
|
|
|
inherit url rev leaveDotGit fetchLFS fetchSubmodules deepClone branchName nonConeMode postFetch;
|
|
|
|
postHook = if netrcPhase == null then null else ''
|
|
${netrcPhase}
|
|
# required that git uses the netrc file
|
|
mv {,.}netrc
|
|
export HOME=$PWD
|
|
'';
|
|
|
|
GIT_SSL_CAINFO = "${cacert}/etc/ssl/certs/ca-bundle.crt";
|
|
|
|
impureEnvVars = lib.fetchers.proxyImpureEnvVars ++ netrcImpureEnvVars ++ [
|
|
"GIT_PROXY_COMMAND" "NIX_GIT_SSL_CAINFO" "SOCKS_SERVER"
|
|
];
|
|
|
|
|
|
inherit preferLocalBuild meta allowedRequisites;
|
|
|
|
passthru = {
|
|
gitRepoUrl = url;
|
|
};
|
|
}
|
|
)
|