ncurses: adding external support. (#18609)

* ncurses: adding external support.

* Update var/spack/repos/builtin/packages/ncurses/package.py

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* Update var/spack/repos/builtin/packages/ncurses/package.py

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* Update var/spack/repos/builtin/packages/ncurses/package.py

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* Fixing includes.

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

1 files changed, 39 insertions, 7 deletions

diff --git a/var/spack/repos/builtin/packages/ncurses/package.py b/var/spack/repos/builtin/packages/ncurses/package.py
index abb05284f3..0fe28c1f4e 100644
--- a/var/spack/repos/builtin/packages/ncurses/package.py
+++ b/var/spack/repos/builtin/packages/ncurses/package.py
@@ -4,9 +4,8 @@
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
 from spack import *
-from glob import glob
-from os.path import exists, join
-from os import makedirs
+import glob
+import os
 
 
 class Ncurses(AutotoolsPackage, GNUMirrorPackage):
@@ -20,6 +19,8 @@ class Ncurses(AutotoolsPackage, GNUMirrorPackage):
     # URL must remain http:// so Spack can bootstrap curl
     gnu_mirror_path = "ncurses/ncurses-6.1.tar.gz"
 
+    executables = [r'^ncursesw?\d*-config$']
+
     version('6.2', sha256='30306e0c76e0f9f1f0de987cf1c82a5c21e1ce6568b9227f7da5b71cbea86c9d')
     version('6.1', sha256='aa057eeeb4a14d470101eff4597d5833dcef5965331be3528c08d99cebaa0d17')
     version('6.0', sha256='f551c24b30ce8bfb6e96d9f59b42fbea30fa3a6123384172f9e7284bcf647260')
@@ -36,6 +37,37 @@ class Ncurses(AutotoolsPackage, GNUMirrorPackage):
     patch('patch_gcc_5.txt', when='@6.0%gcc@5.0:')
     patch('sed_pgi.patch',   when='@:6.0')
 
+    @classmethod
+    def determine_version(cls, exe):
+        return Executable(exe)('--version', output=str, error=str).rstrip()
+
+    @classmethod
+    def determine_variants(cls, exes, version):
+        results = []
+        for exe in exes:
+            variants = ''
+            output = Executable(exe)('--libs', output=str, error=str)
+
+            if '-ltinfo' in output:
+                variants += "+termlib"
+
+            output = Executable(exe)('--terminfo-dirs', output=str, error=str)
+            usingSymlinks = False
+            for termDir in output.split(':'):
+                for top, dirs, files in os.walk(termDir):
+                    for filename in files:
+                        if os.path.islink(os.path.join(top, filename)):
+                            usingSymlinks = True
+                            break
+                    if usingSymlinks:
+                        break
+                if usingSymlinks:
+                    break
+            if usingSymlinks:
+                variants += '+symlinks'
+            results.append(variants)
+        return results
+
     def setup_build_environment(self, env):
         env.unset('TERMINFO')
 
@@ -99,11 +131,11 @@ class Ncurses(AutotoolsPackage, GNUMirrorPackage):
             make('install')
 
         # fix for packages like hstr that use "#include <ncurses/ncurses.h>"
-        headers = glob(join(prefix.include, '*'))
+        headers = glob.glob(os.path.join(prefix.include, '*'))
         for p_dir in ['ncurses', 'ncursesw']:
-            path = join(prefix.include, p_dir)
-            if not exists(path):
-                makedirs(path)
+            path = os.path.join(prefix.include, p_dir)
+            if not os.path.exists(path):
+                os.makedirs(path)
             for header in headers:
                 install(header, path)