nixpkgs/pkgs/development/libraries/libssh2/default.nix

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{ stdenv, fetchurl
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# Optional Dependencies
, zlib ? null
# Crypto Dependencies
, openssl ? null, libgcrypt ? null
}:
let
mkFlag = trueStr: falseStr: cond: name: val:
if cond == null then null else
"--${if cond != false then trueStr else falseStr}${name}${if val != null && cond != false then "=${val}" else ""}";
mkEnable = mkFlag "enable-" "disable-";
mkWith = mkFlag "with-" "without-";
mkOther = mkFlag "" "" true;
shouldUsePkg = pkg: if pkg != null && stdenv.lib.any (x: x == stdenv.system) pkg.meta.platforms then pkg else null;
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# Prefer openssl
cryptoStr = if shouldUsePkg openssl != null then "openssl"
else if shouldUsePkg libgcrypt != null then "libgcrypt"
else "none";
crypto = {
openssl = openssl;
libgcrypt = libgcrypt;
none = null;
}.${cryptoStr};
optZlib = shouldUsePkg zlib;
in
assert crypto != null;
with stdenv.lib;
stdenv.mkDerivation rec {
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name = "libssh2-1.5.0";
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src = fetchurl {
url = "${meta.homepage}/download/${name}.tar.gz";
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sha256 = "1z6hfgak00yz0azx6lk6n688mywhdxx03j6sdf95p3w6ssnnn6c3";
};
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buildInputs = [ crypto optZlib ];
configureFlags = [
(mkWith (cryptoStr == "openssl") "openssl" null)
(mkWith (cryptoStr == "libgcrypt") "libgcrypt" null)
(mkWith false "wicng" null)
(mkWith optZlib "libz" null)
(mkEnable false "crypt-none" null)
(mkEnable false "mac-none" null)
(mkEnable true "gex-new" null)
(mkEnable false "debug" null)
(mkEnable false "examples-build" null)
];
postInstall = optionalString (optZlib != null) ''
sed -i 's,\(-lz\),-L${optZlib}/lib \1,' $out/lib/libssh2.la
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'' + optionalString (cryptoStr == "openssl") ''
sed -i 's,\(-lssl\|-lcrypto\),-L${openssl}/lib \1,' $out/lib/libssh2.la
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'' + optionalString (cryptoStr == "libgcrypt") ''
sed -i 's,\(-lgcrypt\),-L${libgcrypt}/lib \1,' $out/lib/libssh2.la
'';
meta = {
description = "A client-side C library implementing the SSH2 protocol";
homepage = http://www.libssh2.org;
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license = licenses.gpl2;
platforms = platforms.all;
maintainers = with maintainers; [ urkud wkennington ];
};
}