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* builtins.filterSource: pass the type of the file ("regular",

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"directory", "symlink") as the second argument to the filter
  predicate.
This commit is contained in:
Eelco Dolstra 2007-01-15 08:54:51 +00:00
parent 63f3ce6d9a
commit e4b0666f8e
3 changed files with 23 additions and 2 deletions
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19
src/libexpr/primops.cc
View file

@ -7,6 +7,10 @@
#include "expr-to-xml.hh"
#include "nixexpr-ast.hh"
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <algorithm>
@ -739,7 +743,20 @@ struct FilterFromExpr : PathFilter
bool operator () (const Path & path)
{
Expr call = makeCall(filter, makePath(toATerm(path)));
struct stat st;
if (lstat(path.c_str(), &st))
throw SysError(format("getting attributes of path `%1%'") % path);
Expr call =
makeCall(
makeCall(filter, makePath(toATerm(path))),
makeStr(
S_ISREG(st.st_mode) ? "regular" :
S_ISDIR(st.st_mode) ? "directory" :
S_ISLNK(st.st_mode) ? "symlink" :
"unknown" /* not supported, will fail! */
));
return evalBool(state, call);
}
};

4
tests/filter-source.nix.in
View file

@ -3,5 +3,7 @@ derivation {
system = "@system@";
builder = "@shell@";
args = ["-e" "-x" (builtins.toFile "builder" "PATH=@testPath@; ln -s $input $out")];
input = builtins.filterSource (path: baseNameOf (toString path) != "foo") ./test-tmp/filterin;
input =
let filter = path: type: type != "symlink" && baseNameOf (toString path) != "foo";
in builtins.filterSource filter ./test-tmp/filterin;
}

2
tests/filter-source.sh
View file

@ -5,9 +5,11 @@ mkdir $TEST_ROOT/filterin
mkdir $TEST_ROOT/filterin/foo
touch $TEST_ROOT/filterin/foo/bar
touch $TEST_ROOT/filterin/xyzzy
ln -s xyzzy $TEST_ROOT/filterin/link
$NIX_BIN_DIR/nix-build ./filter-source.nix -o $TEST_ROOT/filterout
set -x
test ! -e $TEST_ROOT/filterout/foo/bar
test -e $TEST_ROOT/filterout/xyzzy
test ! -L $TEST_ROOT/filterout/link