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Code Activity

* Maintain integrity of the substitute and successor mappings when

Browse source 
deleting a path in the store.
* Allow absolute paths in Nix expressions.
* Get nix-prefetch-url to work again.
* Various other fixes.
This commit is contained in:
Eelco Dolstra 2003-11-22 18:45:56 +00:00
parent 40d9eb14df
commit ab0bc4999a
15 changed files with 152 additions and 199 deletions
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28
scripts/nix-prefetch-url.in
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@ -22,27 +22,29 @@ print "file has hash $hash\n";
my $out2 = "@prefix@/store/nix-prefetch-url-$hash";
rename $out, $out2;
# Create a Fix expression.
my $fixexpr =
"App(IncludeFix(\"fetchurl/fetchurl.fix\"), " .
"[(\"url\", \"$url\"), (\"md5\", \"$hash\")])";
# Create a Nix expression.
my $nixexpr =
"(import @datadir@/nix/corepkgs/fetchurl) " .
"{url = $url; md5 = \"$hash\"; system = \"@host@\"}";
print "expr: $nixexpr\n";
# Instantiate a Nix expression.
print STDERR "running fix...\n";
my $pid = open2(\*READ, \*WRITE, "fix -") or die "cannot run fix";
print STDERR "instantiating Nix expression...\n";
my $pid = open2(\*READ, \*WRITE, "nix-instantiate -") or die "cannot run nix-instantiate";
print WRITE $fixexpr;
print WRITE $nixexpr;
close WRITE;
my $id = <READ>;
chomp $id;
my $drvpath = <READ>;
chomp $drvpath;
waitpid $pid, 0;
$? == 0 or die "fix failed";
$? == 0 or die "nix-instantiate failed";
# Run Nix.
print STDERR "running nix...\n";
system "nix --install $id > /dev/null";
$? == 0 or die "`nix --install' failed";
print STDERR "realising store expression $drvpath...\n";
system "nix-store --realise $drvpath > /dev/null";
$? == 0 or die "realisation failed";
unlink $out2;