cURL package: add support for building on Windows (#30169)

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

@@ -3,13 +3,17 @@
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
+import glob
+import os
 import re
 import sys
 
+from spack.build_systems.autotools import AutotoolsBuilder
+from spack.build_systems.nmake import NMakeBuilder
 from spack.package import *
 
 
-class Curl(AutotoolsPackage):
+class Curl(NMakePackage, AutotoolsPackage):
     """cURL is an open source command line tool and library for
     transferring data with URL syntax"""
 
@@ -60,6 +64,8 @@ class Curl(AutotoolsPackage):
     default_tls = "openssl"
     if sys.platform == "darwin":
         default_tls = "secure_transport"
+    elif sys.platform == "win32":
+        default_tls = "sspi"
 
     # TODO: add dependencies for other possible TLS backends
     variant(
@@ -78,6 +84,7 @@ class Curl(AutotoolsPackage):
             # 'schannel',
             "secure_transport",
             # 'wolfssl',
+            conditional("sspi", when="platform=windows"),
         ),
         multi=True,
     )
@@ -88,13 +95,17 @@ class Curl(AutotoolsPackage):
     variant("librtmp", default=False, description="enable Rtmp support")
     variant("ldap", default=False, description="enable ldap support")
     variant("libidn2", default=False, description="enable libidn2 support")
-    variant(
-        "libs",
-        default="shared,static",
-        values=("shared", "static"),
-        multi=True,
-        description="Build shared libs, static libs or both",
-    )
+    for plat in ["darwin", "cray", "linux"]:
+        with when("platform=%s" % plat):
+            variant(
+                "libs",
+                default="shared,static",
+                values=("shared", "static"),
+                multi=True,
+                description="Build shared libs, static libs or both",
+            )
+            # curl queries pkgconfig for openssl compilation flags
+            depends_on("pkgconfig", type="build")
 
     conflicts("platform=cray", when="tls=secure_transport", msg="Only supported on macOS")
     conflicts("platform=linux", when="tls=secure_transport", msg="Only supported on macOS")
@@ -117,6 +128,12 @@ class Curl(AutotoolsPackage):
     # https://github.com/curl/curl/pull/9054
     patch("easy-lock-sched-header.patch", when="@7.84.0")
 
+    build_system(
+        "autotools",
+        conditional("nmake", when="platform=windows"),
+        default="autotools",
+    )
+
     @classmethod
     def determine_version(cls, exe):
         curl = Executable(exe)
@@ -150,6 +167,8 @@ def determine_variants(cls, exes, version):
     def command(self):
         return Executable(self.prefix.bin.join("curl-config"))
 
+
+class AutotoolsBuilder(AutotoolsBuilder):
     def configure_args(self):
         spec = self.spec
 
@@ -239,3 +258,54 @@ def with_or_without_secure_transport(self, activated):
                 return "--with-darwinssl"
             else:
                 return "--without-darwinssl"
+
+
+class NMakeBuilder(NMakeBuilder):
+    phases = ["install"]
+
+    def nmake_args(self):
+        args = []
+        mode = "dll" if "libs=dll" in self.spec else "static"
+        args.append("mode=%s" % mode)
+        args.append("WITH_ZLIB=%s" % mode)
+        args.append("ZLIB_PATH=%s" % self.spec["zlib"].prefix)
+        if "+libssh" in self.spec:
+            args.append("WITH_SSH=%s" % mode)
+        if "+libssh2" in self.spec:
+            args.append("WITH_SSH2=%s" % mode)
+            args.append("SSH2_PATH=%s" % self.spec["libssh2"].prefix)
+        if "+nghttp2" in self.spec:
+            args.append("WITH_NGHTTP2=%s" % mode)
+            args.append("NGHTTP2=%s" % self.spec["nghttp2"].prefix)
+        if "tls=openssl" in self.spec:
+            args.append("WITH_SSL=%s" % mode)
+            args.append("SSL_PATH=%s" % self.spec["openssl"].prefix)
+        elif "tls=mbedtls" in self.spec:
+            args.append("WITH_MBEDTLS=%s" % mode)
+            args.append("MBEDTLS_PATH=%s" % self.spec["mbedtls"].prefix)
+        elif "tls=sspi" in self.spec:
+            args.append("ENABLE_SSPI=%s" % mode)
+
+        # The trailing path seperator is REQUIRED for cURL to install
+        # otherwise cURLs build system will interpret the path as a file
+        # and the install will fail with ambiguous errors
+        args.append("WITH_PREFIX=%s" % self.prefix + "\\")
+        return args
+
+    def install(self, spec, prefix):
+        # Spack's env CC and CXX values will cause an error
+        # if there is a path in the space, and escaping with
+        # double quotes raises a syntax issues, instead
+        # cURLs nmake will automatically invoke proper cl.exe if
+        # no env value for CC, CXX is specified
+        # Unset the value to allow for cURLs heuristics (derive via VCVARS)
+        # to derive the proper compiler
+        env = os.environ
+        env["CC"] = ""
+        env["CXX"] = ""
+        winbuild_dir = os.path.join(self.stage.source_path, "winbuild")
+        with working_dir(winbuild_dir):
+            nmake("/f", "Makefile.vc", *self.nmake_args(), ignore_quotes=True)
+        with working_dir(os.path.join(self.stage.source_path, "builds")):
+            install_dir = glob.glob("libcurl-**")[0]
+            install_tree(install_dir, self.prefix)