* Give unpacked channels more sensible names than 0, 1, ... They now

get the basename of the channel URL (e.g., nixpkgs-unstable).  The
  top-level Nix expression of the channel is now an attribute set, the
  attributes of which are the individual channels (e.g.,
  {nixpkgs_unstable = ...; strategoxt_unstable = ...}).  This makes
  attribute paths ("nix-env -qaA" and "nix-env -iA") more sensible,
  e.g., "nix-env -iA nixpkgs_unstable.subversion".
This commit is contained in:
Eelco Dolstra 2007-05-01 23:16:38 +00:00
parent a9d15d4f43
commit 93aefd9fc0
5 changed files with 43 additions and 20 deletions

View file

@ -139,6 +139,7 @@ fi
AC_MSG_RESULT(yes)
NEED_PROG(cat, cat)
NEED_PROG(tr, tr)
AC_ARG_WITH(coreutils-bin, AC_HELP_STRING([--with-coreutils-bin=PATH],
[path of cat, mkdir, etc.]),
coreutils=$withval, coreutils=$(dirname $cat))

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@ -5,18 +5,29 @@
cd $out/tmp
expr=$out/default.nix
echo '[' > $expr
echo '{' > $expr
nr=0
for i in $inputs; do
echo "unpacking $i"
@bunzip2@ < $i | @tar@ xf -
@coreutils@/mv * ../$nr # !!! hacky
echo "(import ./$nr)" >> $expr
nr=$(($nr + 1))
inputs=($inputs)
for ((n = 0; n < ${#inputs[*]}; n += 2)); do
channelName=${inputs[n]}
channelTarball=${inputs[n+1]}
echo "unpacking channel $channelName"
@bunzip2@ < $channelTarball | @tar@ xf -
nr=1
dirName=$channelName
while test -e ../$dirName; do
nr=$((nr+1))
dirName=$channelName-$nr
done
@coreutils@/mv * ../$dirName # !!! hacky
attrName=$(echo $dirName | @tr@ -- '- ' '__')
echo "$attrName = import ./$dirName {};" >> $expr
done
echo ']' >> $expr
echo '} // {_combineChannels = true;}' >> $expr
cd ..
@coreutils@/rmdir tmp

View file

@ -89,21 +89,22 @@ sub update {
# Create a Nix expression that fetches and unpacks the channel Nix
# expressions.
my $nixExpr = "[";
my $inputs = "[";
foreach my $url (@channels) {
$url =~ /\/([^\/]+)\/?$/;
my $channelName = $1;
$channelName = "unnamed" unless defined $channelName;
print "$channelName\n";
my $fullURL = "$url/nixexprs.tar.bz2";
print "downloading Nix expressions from `$fullURL'...\n";
$ENV{"PRINT_PATH"} = 1;
my ($hash, $path) = `@bindir@/nix-prefetch-url '$fullURL' 2> /dev/null`;
die "cannot fetch `$fullURL'" if $? != 0;
chomp $path;
$nixExpr .= $path . " ";
$inputs .= '"' . $channelName . '"' . " " . $path . " ";
}
$nixExpr .= "]";
$nixExpr =
"(import @datadir@/nix/corepkgs/channels/unpack.nix) " .
"{inputs = $nixExpr; system = \"@system@\";}";
$inputs .= "]";
# Figure out a name for the GC root.
my $userName = getpwuid($<);
@ -113,7 +114,7 @@ sub update {
# Instantiate the Nix expression.
print "unpacking channel Nix expressions...\n";
my $storeExpr = `echo '$nixExpr' | @bindir@/nix-instantiate --add-root '$rootFile'.tmp -`
my $storeExpr = `@bindir@/nix-instantiate --add-root '$rootFile'.tmp @datadir@/nix/corepkgs/channels/unpack.nix --argstr system @system@ --arg inputs '$inputs'`
or die "cannot instantiate Nix expression";
chomp $storeExpr;

View file

@ -170,12 +170,21 @@ static void getDerivations(EvalState & state, Expr e,
if (matchAttrs(e, es)) {
ATermMap drvMap(ATgetLength(es));
queryAllAttrs(e, drvMap);
/* !!! undocumented hackery to support
corepkgs/channels/unpack.sh. */
Expr e2 = drvMap.get(toATerm("_combineChannels"));
bool combineChannels = e2 && evalBool(state, e2);
for (ATermMap::const_iterator i = drvMap.begin(); i != drvMap.end(); ++i) {
startNest(nest, lvlDebug,
format("evaluating attribute `%1%'") % aterm2String(i->key));
string pathPrefix2 = addToPath(pathPrefix, aterm2String(i->key));
if (getDerivation(state, i->value, pathPrefix2, drvs, doneExprs)) {
if (combineChannels) {
if (((string) aterm2String(i->key)) != "_combineChannels")
getDerivations(state, i->value, pathPrefix2, autoArgs, drvs, doneExprs);
}
else if (getDerivation(state, i->value, pathPrefix2, drvs, doneExprs)) {
/* If the value of this attribute is itself an
attribute set, should we recurse into it? => Only
if it has a `recurseForDerivations = true'
@ -185,8 +194,8 @@ static void getDerivations(EvalState & state, Expr e,
if (matchAttrs(e, es)) {
ATermMap attrs(ATgetLength(es));
queryAllAttrs(e, attrs, false);
Expr e2 = attrs.get(toATerm("recurseForDerivations"));
if (e2 && evalBool(state, e2))
if (((e2 = attrs.get(toATerm("recurseForDerivations")))
&& evalBool(state, e2)))
getDerivations(state, e, pathPrefix2, autoArgs, drvs, doneExprs);
}
}

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@ -17,6 +17,7 @@
-e "s^@perl\@^$(perl)^g" \
-e "s^@coreutils\@^$(coreutils)^g" \
-e "s^@tar\@^$(tar)^g" \
-e "s^@tr\@^$(tr)^g" \
-e "s^@dot\@^$(dot)^g" \
-e "s^@xmllint\@^$(xmllint)^g" \
-e "s^@xmlflags\@^$(xmlflags)^g" \