lhapdfsets: fix an error by avoiding the lhapdf command (#35997)

Co-authored-by: Wouter Deconinck <wdconinc@gmail.com>

var/spack/repos/builtin/packages/lhapdf/package.py

@@ -19,6 +19,8 @@ class Lhapdf(AutotoolsPackage):
 
     tags = ["hep"]
 
+    maintainers("vvolkl", "wdconinc")
+
     version("6.5.4", sha256="ace8913781044ad542e378697fcd95a8535d510818bb74a6665f9fd2b132ac0f")
     version("6.5.3", sha256="90fe7254d5a48a9b2d424fcbac1bf9708b0e54690efec4c78e9ad28b9203bfcd")
     version("6.5.2", sha256="23972ec46289c82a63df60b55b62f219418b4d80f94b8d570feb2b5e48014054")

var/spack/repos/builtin/packages/lhapdfsets/package.py

@@ -16,11 +16,13 @@ class Lhapdfsets(BundlePackage):
 
     tags = ["hep"]
 
-    maintainers("vvolkl")
+    maintainers("vvolkl", "wdconinc")
 
     version("6.3.0")
 
     depends_on("lhapdf", type="build")
+    depends_on("tar", type="build")
+    depends_on("curl", type="build")
 
     phases = ["install"]
 
@@ -36,7 +38,8 @@ class Lhapdfsets(BundlePackage):
 
     def install(self, spec, prefix):
         mkdirp(self.prefix.share.lhapdfsets)
-        lhapdf = which("lhapdf")
+        tar = which("tar")
+        curl = which("curl")
         sets = self.spec.variants["sets"].value
         if sets == "all":
             # parse set names from index file
@@ -50,7 +53,17 @@ def install(self, spec, prefix):
         elif sets == "default":
             default_sets = ["MMHT2014lo68cl", "MMHT2014nlo68cl", "CT14lo", "CT14nlo"]
             sets = default_sets
-        lhapdf("--pdfdir=" + self.prefix.share.lhapdfsets, "install", *sets)
+        with working_dir(self.prefix.share.lhapdfsets):
+            for s in sets:
+                _filename = "%s.tar.gz" % s
+                curl(
+                    "-L",
+                    "-o",
+                    _filename,
+                    "http://lhapdfsets.web.cern.ch/lhapdfsets/current/%s" % _filename,
+                )
+                tar("xfz", _filename)
+                os.remove(_filename)
 
     def setup_dependent_build_environment(self, env, dependent_spec):
         env.set("LHAPDF_DATA_PATH", self.prefix.share.lhapdfsets)