Merge branch 'develop' of github.com:DiegoMagdaleno/spack into develop

Fix linking libgit2 on Darwin

var/spack/repos/builtin/packages/libgit2/package.py

@@ -4,6 +4,7 @@
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
 from spack import *
+import sys
 
 
 class Libgit2(CMakePackage):
@@ -16,7 +17,7 @@ class Libgit2(CMakePackage):
     homepage = "https://libgit2.github.com/"
     url      = "https://github.com/libgit2/libgit2/archive/v0.26.0.tar.gz"
 
-    maintainers = ["AndrewGaspar"]
+    maintainers = ["AndrewGaspar", "DiegoMagdaleno"]
 
     version('1.0.0',   sha256='6a1fa16a7f6335ce8b2630fbdbb5e57c4027929ebc56fcd1ac55edb141b409b4')
     version('0.99.0',  sha256='174024310c1563097a6613a0d3f7539d11a9a86517cd67ce533849065de08a11')
@@ -96,3 +97,22 @@ def cmake_args(self):
             '-DBUILD_CLAR={0}'.format('ON' if self.run_tests else 'OFF'))
 
         return args
+
+    # This fixes a linking error on Darwin based operating systems
+    # as far as i know this issue happened on Darwin 19, in macOS versions
+    # macOS catalina, this should link the symbol to its correct place.
+
+    # I dont know if the issue
+    # is present on other operating systems, so for now
+    # we only execute this if is platform is Darwin, also install_name_tool is
+    # a mach tool only.
+    @run_after('install')
+    def fix_linking(self):
+        if sys.platform == 'darwin':
+            install_name_tool = which('install_name_tool')
+            install_name_tool('-change', 'libssh2.1.dylib',
+                              '{0}'.format(
+                                  self.spec['libssh2'].prefix.lib
+                                  + '/libssh2.1.0.1.dylib'),
+                              '{0}'.format(
+                                  prefix.lib + '/libgit2.1.0.0.dylib'))