depot/third_party/nixpkgs/pkgs/build-support/fetchsvn/default.nix

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{ lib, stdenvNoCC, buildPackages
, subversion, glibcLocales, sshSupport ? true, openssh ? null
}:
{ url, rev ? "HEAD", sha256 ? "", hash ? ""
, ignoreExternals ? false, ignoreKeywords ? false, name ? null
, preferLocalBuild ? true
}:
assert sshSupport -> openssh != null;
let
repoName = with lib;
let
fst = head;
snd = l: head (tail l);
trd = l: head (tail (tail l));
path_ =
(p: if head p == "" then tail p else p) # ~ drop final slash if any
(reverseList (splitString "/" url));
path = [ (removeSuffix "/" (head path_)) ] ++ (tail path_);
in
# ../repo/trunk -> repo
if fst path == "trunk" then snd path
# ../repo/branches/branch -> repo-branch
else if snd path == "branches" then "${trd path}-${fst path}"
# ../repo/tags/tag -> repo-tag
else if snd path == "tags" then "${trd path}-${fst path}"
# ../repo (no trunk) -> repo
else fst path;
name_ = if name == null then "${repoName}-r${toString rev}" else name;
in
if hash != "" && sha256 != "" then
throw "Only one of sha256 or hash can be set"
else
stdenvNoCC.mkDerivation {
name = name_;
builder = ./builder.sh;
nativeBuildInputs = [ subversion glibcLocales ]
++ lib.optional sshSupport openssh;
SVN_SSH = if sshSupport then "${buildPackages.openssh}/bin/ssh" else null;
outputHashAlgo = if hash != "" then null else "sha256";
outputHashMode = "recursive";
outputHash = if hash != "" then
hash
else if sha256 != "" then
sha256
else
lib.fakeSha256;
inherit url rev ignoreExternals ignoreKeywords;
impureEnvVars = lib.fetchers.proxyImpureEnvVars;
inherit preferLocalBuild;
}