grads: add versions and variants (#40017)

* Add grads versions, variants, and dependency
* Bugfix for hdf4 libs and style fixes
* Switch boolean variant checking syntax

var/spack/repos/builtin/packages/gadap/cxx-updates.patch

@@ -0,0 +1,62 @@
+--- a/src/gaBaseTypes.cc	2008-07-25 14:43:25.000000000 -0600
++++ b/src/gaBaseTypes.cc	2023-09-13 14:59:50.000000000 -0600
+@@ -31,6 +31,7 @@
+ #include "gaBaseTypes.h"
+ #include "gaTypeFactory.h"
+ 
++
+ /** class declarations for gaStr and gaUrl are in gaBaseTypes.h so we
+  * can't declare them again, we have to define each function
+  * individually
+--- a/src/gaBaseTypes.h	2008-07-25 14:43:25.000000000 -0600
++++ b/src/gaBaseTypes.h	2023-09-13 14:44:39.000000000 -0600
+@@ -31,6 +31,7 @@
+  * 
+  */
+ 
++using namespace libdap;
+ 
+ class gaStr: public Str {
+ public:
+--- a/src/gaReports.cc	2008-07-25 14:43:25.000000000 -0600
++++ b/src/gaReports.cc	2023-09-13 14:50:28.000000000 -0600
+@@ -12,6 +12,7 @@
+  */
+ 
+ #include <iostream>
++#include <cstring>
+ #include "gaReports.h"
+ #include "gaUtils.h"
+ #include "Grid.h"
+--- a/src/gaTypeFactory.h	2008-07-25 14:43:25.000000000 -0600
++++ b/src/gaTypeFactory.h	2023-09-13 14:44:43.000000000 -0600
+@@ -28,6 +28,8 @@
+ 
+ #include <string>
+ 
++using namespace libdap;
++
+ // Class declarations; Make sure to include the corresponding headers in the
+ // implementation file.
+ 
+--- a/src/gaUtils.h	2008-07-25 14:43:25.000000000 -0600
++++ b/src/gaUtils.h	2023-09-13 14:46:27.000000000 -0600
+@@ -23,6 +23,8 @@
+ #include "Sequence.h"
+ #include "gadap.h"
+ 
++using namespace libdap;
++
+ typedef struct varinfo {
+   string name;
+   string longname;
+--- a/test/test.cc	2008-07-30 06:35:43.000000000 -0600
++++ b/test/test.cc	2023-09-13 15:12:48.000000000 -0600
+@@ -9,6 +9,7 @@
+ #include "gadap.h"
+ #include <iostream>
+ #include <string>
++#include <cstring>
+ 
+ using namespace std;
+ 

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

@@ -0,0 +1,28 @@
+# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class Gadap(AutotoolsPackage):
+    """Enables OPeNDAP access of in situ data."""
+
+    homepage = "http://cola.gmu.edu/grads/gadoc/supplibs.html"
+    url = "http://cola.gmu.edu/grads/Supplibs/2.1/src/gadap-2.0.tar.gz"
+
+    maintainers("vanderwb")
+
+    version("2.0", sha256="ae9a989ca00ec29fb40616383d170883f07c022456db338399982a8a94ec0100")
+
+    depends_on("curl@7.18.0:")
+    depends_on("libdap4")
+    depends_on("libxml2")
+
+    # libdap uses namespacing in recent versions, so we need to patch this source
+    patch("cxx-updates.patch")
+
+    def setup_build_environment(self, env):
+        env.set("CFLAGS", "-fPIC")
+        env.set("CXXFLAGS", "-fPIC")

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

@@ -15,25 +15,35 @@ class Grads(AutotoolsPackage):
     HDF (version 4 and 5), and BUFR (for station data)."""
 
     homepage = "http://cola.gmu.edu/grads/grads.php"
-    url = "ftp://cola.gmu.edu/grads/2.2/grads-2.2.1-src.tar.gz"
 
+    maintainers("vanderwb")
+
+    version("2.2.3", sha256="2cbb67284fe64763c589ecaf08d5bd31144554dfd82a1fccf71e1cc424695a9e")
+    version("2.2.2", sha256="1b5a600d4d407ffcf2fbbbba42037a6e1ebfdb8246ba56b93c628e3c472b4ded")
     version("2.2.1", sha256="695e2066d7d131720d598bac0beb61ac3ae5578240a5437401dc0ffbbe516206")
 
     variant("geotiff", default=True, description="Enable GeoTIFF support")
     variant("shapefile", default=True, description="Enable Shapefile support")
+    variant("grib2", default=True, description="Enable GRIB2 support")
+    variant("dap", default=False, description="Enable DAP support")
 
-    """
-    # FIXME: Fails with undeclared functions (tdefi, tdef, ...) in gauser.c
-    variant('hdf5', default=False, description="Enable HDF5 support")
-    variant('hdf4', default=False, description="Enable HDF4 support")
-    variant('netcdf', default=False, description="Enable NetCDF support")
-    depends_on('hdf5', when='+hdf5')
-    depends_on('hdf', when='+hdf4')
-    depends_on('netcdf-c', when='+netcdf')
-    """
+    # TODO: This variant depends on the "simple X" library, which is no longer available
+    # from any trusted source. Revisit if this changes.
+    # variant("gui", default=False, description="Enable graphical user interface")
 
+    # These variants are broken in 2.2.1
+    # See https://github.com/j-m-adams/GrADS/issues/2
+    variant("hdf5", default=True, when="@2.2.2:", description="Enable HDF5 support")
+    variant("hdf4", default=True, when="@2.2.2:", description="Enable HDF4 support")
+    variant("netcdf", default=True, when="@2.2.2:", description="Enable NetCDF support")
+
+    depends_on("hdf5@:1.10", when="+hdf5")
+    depends_on("hdf", when="+hdf4")
+    depends_on("netcdf-c", when="+netcdf")
+    depends_on("g2c", when="+grib2")
     depends_on("libgeotiff", when="+geotiff")
     depends_on("shapelib", when="+shapefile")
+    depends_on("gadap", when="+dap")
     depends_on("udunits")
     depends_on("libgd")
     depends_on("libxmu")
@@ -41,9 +51,30 @@ class Grads(AutotoolsPackage):
     depends_on("readline")
     depends_on("pkgconfig", type="build")
 
+    # The project is hosted on GitHub for versions 2.2.2 and later
+    def url_for_version(self, version):
+        if version >= Version("2.2.2"):
+            url = "https://github.com/j-m-adams/GrADS/archive/refs/tags/v{}.tar.gz"
+            return url.format(version)
+        else:
+            url = "ftp://cola.gmu.edu/grads/{}/grads-{}-src.tar.gz"
+            return url.format(version.up_to(2), version)
+
+    # Name of grib2 C library has changed in recent versions
+    with when("+grib2"):
+
+        def patch(self):
+            filter_file("grib2c", "g2c", "configure")
+
     def setup_build_environment(self, env):
         env.set("SUPPLIBS", "/")
 
+        # Recent versions configure scripts break without PKG_CONFIG set
+        env.set("PKG_CONFIG", self.spec["pkgconfig"].prefix.bin.join("pkg-config"))
+
+        if "+hdf4" in self.spec and "~shared" in self.spec["hdf"]:
+            env.set("LIBS", self.spec["hdf:transitive"].libs)
+
     def setup_run_environment(self, env):
         env.set("GADDIR", self.prefix.data)
 
@@ -58,4 +89,9 @@ def copy_data(self):
     def configure_args(self):
         args = []
         args.extend(self.with_or_without("geotiff"))
+        args.extend(self.with_or_without("hdf4"))
+        args.extend(self.with_or_without("hdf5"))
+        args.extend(self.with_or_without("netcdf"))
+        args.extend(self.with_or_without("gadap", variant="dap"))
+
         return args