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<nix/fetchurl.nix>: Support downloading and unpacking NARs
This removes the need to have multiple downloads in the stdenv bootstrap process (like a separate busybox binary for Linux, or curl/mkdir/sh/bzip2 for Darwin). Now all those files can be combined into a single NAR.
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commit
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4 changed files with 46 additions and 16 deletions
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@ -1,12 +1,19 @@
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with import <nix/config.nix>;
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with import <nix/config.nix>;
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{system ? builtins.currentSystem, url, outputHash ? "", outputHashAlgo ? "", md5 ? "", sha1 ? "", sha256 ? "", executable ? false}:
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{ system ? builtins.currentSystem
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, url
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, outputHash ? ""
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, outputHashAlgo ? ""
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, md5 ? "", sha1 ? "", sha256 ? ""
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, executable ? false
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, unpack ? false
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, name ? baseNameOf (toString url)
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}:
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assert (outputHash != "" && outputHashAlgo != "")
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assert (outputHash != "" && outputHashAlgo != "")
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|| md5 != "" || sha1 != "" || sha256 != "";
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|| md5 != "" || sha1 != "" || sha256 != "";
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derivation {
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derivation {
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name = baseNameOf (toString url);
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builder = "builtin:fetchurl";
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builder = "builtin:fetchurl";
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# New-style output content requirements.
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# New-style output content requirements.
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@ -14,9 +21,9 @@ derivation {
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if sha256 != "" then "sha256" else if sha1 != "" then "sha1" else "md5";
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if sha256 != "" then "sha256" else if sha1 != "" then "sha1" else "md5";
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outputHash = if outputHash != "" then outputHash else
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outputHash = if outputHash != "" then outputHash else
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if sha256 != "" then sha256 else if sha1 != "" then sha1 else md5;
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if sha256 != "" then sha256 else if sha1 != "" then sha1 else md5;
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outputHashMode = if executable then "recursive" else "flat";
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outputHashMode = if unpack || executable then "recursive" else "flat";
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inherit system url executable;
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inherit name system url executable unpack;
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# No need to double the amount of network traffic
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# No need to double the amount of network traffic
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preferLocalBuild = true;
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preferLocalBuild = true;
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@ -1,5 +1,7 @@
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#include "builtins.hh"
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#include "builtins.hh"
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#include "download.hh"
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#include "download.hh"
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#include "store-api.hh"
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#include "archive.hh"
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namespace nix {
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namespace nix {
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@ -20,12 +22,21 @@ void builtinFetchurl(const BasicDerivation & drv)
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auto out = drv.env.find("out");
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auto out = drv.env.find("out");
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if (out == drv.env.end()) throw Error("attribute ‘url’ missing");
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if (out == drv.env.end()) throw Error("attribute ‘url’ missing");
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writeFile(out->second, data.data);
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Path storePath = out->second;
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assertStorePath(storePath);
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auto unpack = drv.env.find("unpack");
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if (unpack != drv.env.end() && unpack->second == "1") {
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StringSource source(data.data);
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restorePath(storePath, source);
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} else
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writeFile(storePath, data.data);
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auto executable = drv.env.find("executable");
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auto executable = drv.env.find("executable");
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if (executable != drv.env.end() && executable->second == "1") {
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if (executable != drv.env.end() && executable->second == "1") {
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if (chmod(out->second.c_str(), 0755) == -1)
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if (chmod(storePath.c_str(), 0755) == -1)
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throw SysError(format("making ‘%1%’ executable") % out->second);
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throw SysError(format("making ‘%1%’ executable") % storePath);
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}
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}
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}
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}
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@ -1,6 +0,0 @@
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{ filename, sha256 }:
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import <nix/fetchurl.nix> {
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url = "file://${filename}";
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inherit sha256;
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}
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@ -2,8 +2,26 @@ source common.sh
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clearStore
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clearStore
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hash=$(nix-hash --flat --type sha256 ./fetchurl.nix)
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hash=$(nix-hash --flat --type sha256 ./fetchurl.sh)
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outPath=$(nix-build ./fetchurl.nix --argstr filename $(pwd)/fetchurl.nix --argstr sha256 $hash --no-out-link)
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outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$(pwd)/fetchurl.sh --argstr sha256 $hash --no-out-link)
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cmp $outPath fetchurl.nix
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cmp $outPath fetchurl.sh
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rm -rf $TEST_ROOT/archive
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mkdir -p $TEST_ROOT/archive
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cp ./fetchurl.sh $TEST_ROOT/archive
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chmod +x $TEST_ROOT/archive/fetchurl.sh
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ln -s foo $TEST_ROOT/archive/symlink
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nar=$TEST_ROOT/archive.nar
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nix-store --dump $TEST_ROOT/archive > $nar
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hash=$(nix-hash --flat --type sha256 $nar)
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outPath=$(nix-build '<nix/fetchurl.nix>' --argstr url file://$nar --argstr sha256 $hash \
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--arg unpack true --argstr name xyzzy --no-out-link)
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echo $outPath | grep -q 'xyzzy'
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test -x $outPath/fetchurl.sh
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test -L $outPath/symlink
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