Move all licensing support to pre/post_install hooks

lib/spack/docs/packaging_guide.rst

@@ -813,7 +813,7 @@ points to a license server called licman1:
     USE_SERVER
 
 If your package requires the license to install, you can reference the
-location of this global license using ``Package.global_license_file()``.
+location of this global license using ``self.global_license_file``.
 After installation, symlinks for all of the files given in
 ``license_files`` will be created, pointing to this global license.
 If you install a different version or variant of the package, Spack

lib/spack/spack/hooks/licensing.py

@@ -0,0 +1,135 @@
+import os
+
+import spack
+import llnl.util.tty as tty
+from llnl.util.filesystem import join_path
+
+
+def pre_install(pkg):
+    """This hook handles global license setup for licensed software."""
+    if pkg.license_required:
+        set_up_license(pkg)
+
+
+def set_up_license(pkg):
+    """Prompt the user, letting them know that a license is required.
+
+    For packages that rely on license files, a global license file is
+    created and opened for editing.
+
+    For packages that rely on environment variables to point to a
+    license, a warning message is printed.
+
+    For all other packages, documentation on how to set up a license
+    is printed."""
+
+    # If the license can be stored in a file, create one
+    if pkg.license_files:
+        license_path = pkg.global_license_file
+        if not os.path.exists(license_path):
+            # Create a new license file
+            write_license_file(pkg, license_path)
+            # Open up file in user's favorite $EDITOR for editing
+            spack.editor(license_path)
+            tty.msg("Added global license file %s" % license_path)
+        else:
+            # Use already existing license file
+            tty.msg("Found already existing license %s" % license_path)
+
+    # If not a file, what about an environment variable?
+    elif pkg.license_vars:
+        tty.warn("A license is required to use %s. Please set %s to the "
+                 "full pathname to the license file, or port@host if you"
+                 " store your license keys on a dedicated license server" %
+                 (pkg.name, ' or '.join(pkg.license_vars)))
+
+    # If not a file or variable, suggest a website for further info
+    elif pkg.license_url:
+        tty.warn("A license is required to use %s. See %s for details" %
+                (pkg.name, pkg.license_url))
+
+    # If all else fails, you're on your own
+    else:
+        tty.warn("A license is required to use %s" % pkg.name)
+
+
+def write_license_file(pkg, license_path):
+    """Writes empty license file.
+
+    Comments give suggestions on alternative methods of
+    installing a license."""
+
+    comment = pkg.license_comment
+
+    # Global license directory may not already exist
+    if not os.path.exists(os.path.dirname(license_path)):
+        os.makedirs(os.path.dirname(license_path))
+    license = open(license_path, 'w')
+
+    # License files
+    license.write("""\
+{0} A license is required to use {1}.
+{0}
+{0} The recommended solution is to store your license key in this global
+{0} license file. After installation, the following symlink(s) will be
+{0} added to point to this file (relative to the installation prefix):
+{0}
+""".format(comment, pkg.name))
+
+    for filename in pkg.license_files:
+        license.write("{0}\t{1}\n".format(comment, filename))
+
+    license.write("{0}\n".format(comment))
+
+    # Environment variables
+    if pkg.license_vars:
+        license.write("""\
+{0} Alternatively, use one of the following environment variable(s):
+{0}
+""".format(comment))
+
+        for var in pkg.license_vars:
+            license.write("{0}\t{1}\n".format(comment, var))
+
+        license.write("""\
+{0}
+{0} If you choose to store your license in a non-standard location, you may
+{0} set one of these variable(s) to the full pathname to the license file, or
+{0} port@host if you store your license keys on a dedicated license server.
+{0} You will likely want to set this variable in a module file so that it
+{0} gets loaded every time someone tries to use {1}.
+{0}
+""".format(comment, pkg.name))
+
+    # Documentation
+    if pkg.license_url:
+        license.write("""\
+{0} For further information on how to acquire a license, please refer to:
+{0}
+{0}\t{1}
+{0}
+""".format(comment, pkg.license_url))
+
+    license.write("""\
+{0} You may enter your license below.
+
+""".format(comment))
+
+    license.close()
+
+
+def post_install(pkg):
+    """This hook symlinks local licenses to the global license for
+    licensed software."""
+    if pkg.license_required:
+        symlink_license(pkg)
+
+
+def symlink_license(pkg):
+    """Create local symlinks that point to the global license file."""
+    target = pkg.global_license_file
+    for filename in pkg.license_files:
+        link_name = join_path(pkg.prefix, filename)
+        if os.path.exists(target):
+            os.symlink(target, link_name)
+            tty.msg("Added local symlink %s to global license file" % link_name)

lib/spack/spack/package.py

@@ -397,6 +397,17 @@ def __init__(self, spec):
         if self.is_extension:
             spack.repo.get(self.extendee_spec)._check_extendable()
 
+    @property
+    def global_license_file(self):
+        """Returns the path where a global license file should be stored."""
+        if not self.license_files:
+            return
+        spack_root = ancestor(__file__, 4)
+        global_license_dir = join_path(spack_root, 'etc', 'spack', 'licenses')
+        return join_path(global_license_dir, self.name,
+                         os.path.basename(self.license_files[0]))
+
+
     @property
     def version(self):
         if not self.spec.versions.concrete:
@@ -899,10 +910,6 @@ def build_process():
             """Forked for each build. Has its own process and python
                module space set up by build_environment.fork()."""
 
-            # Set up a global license if one is required
-            if self.license_required:
-                self.set_up_license()
-
             start_time = time.time()
             if not fake:
                 if not skip_patch:
@@ -965,10 +972,6 @@ def build_process():
             self._total_time = time.time() - start_time
             build_time = self._total_time - self._fetch_time
 
-            # Symlink local license to global license if one is required
-            if self.license_required and self.license_files:
-                self.symlink_license()
-
             tty.msg("Successfully installed %s" % self.name,
                     "Fetch: %s.  Build: %s.  Total: %s." %
                     (_hms(self._fetch_time), _hms(build_time),
@@ -1019,124 +1022,6 @@ def check_paths(path_list, filetype, predicate):
                 "Install failed for %s.  Nothing was installed!" % self.name)
 
 
-    def global_license_file(self):
-        """Returns the path where a global license file should be stored."""
-        if not self.license_files:
-            return
-        spack_root = ancestor(__file__, 4)
-        global_license_dir = join_path(spack_root, 'etc', 'spack', 'licenses')
-        return join_path(global_license_dir, self.name,
-                         os.path.basename(self.license_files[0]))
-
-
-    def set_up_license(self):
-        """Prompt the user, letting them know that a license is required."""
-
-        # If the license can be stored in a file, create one
-        if self.license_files:
-            license_path = self.global_license_file()
-            if not os.path.exists(license_path):
-                # Create a new license file
-                self.write_license_file(license_path)
-                # Open up file in user's favorite $EDITOR for editing
-                spack.editor(license_path)
-                tty.msg("Added global license file %s" % license_path)
-            else:
-                # Use already existing license file
-                tty.msg("Found already existing license %s" % license_path)
-
-        # If not a file, what about an environment variable?
-        elif self.license_vars:
-            tty.warn("A license is required to use %s. Please set %s to the "
-                     "full pathname to the license file, or port@host if you"
-                     " store your license keys on a dedicated license server" %
-                     (self.name, ' or '.join(self.license_vars)))
-
-        # If not a file or variable, suggest a website for further info
-        elif self.license_url:
-            tty.warn("A license is required to use %s. See %s for details" %
-                    (self.name, self.license_url))
-
-        # If all else fails, you're on your own
-        else:
-            tty.warn("A license is required to use %s" % self.name)
-
-
-    def write_license_file(self, license_path):
-        """Writes empty license file.
-
-        Comments give suggestions on alternative methods of
-        installing a license."""
-
-        comment = self.license_comment
-
-        # Global license directory may not already exist
-        if not os.path.exists(os.path.dirname(license_path)):
-            os.makedirs(os.path.dirname(license_path))
-        license = open(license_path, 'w')
-
-        # License files
-        license.write("""\
-{0} A license is required to use {1}.
-{0}
-{0} The recommended solution is to store your license key in this global
-{0} license file. After installation, the following symlink(s) will be
-{0} added to point to this file (relative to the installation prefix):
-{0}
-""".format(comment, self.name))
-
-        for filename in self.license_files:
-            license.write("{0}\t{1}\n".format(comment, filename))
-
-        license.write("{0}\n".format(comment))
-
-        # Environment variables
-        if self.license_vars:
-            license.write("""\
-{0} Alternatively, use one of the following environment variable(s):
-{0}
-""".format(comment))
-
-            for var in self.license_vars:
-                license.write("{0}\t{1}\n".format(comment, var))
-
-            license.write("""\
-{0}
-{0} If you choose to store your license in a non-standard location, you may
-{0} set one of these variable(s) to the full pathname to the license file, or
-{0} port@host if you store your license keys on a dedicated license server.
-{0} You will likely want to set this variable in a module file so that it
-{0} gets loaded every time someone tries to use {1}.
-{0}
-""".format(comment, self.name))
-
-        # Documentation
-        if self.license_url:
-            license.write("""\
-{0} For further information on how to acquire a license, please refer to:
-{0}
-{0}\t{1}
-{0}
-""".format(comment, self.license_url))
-
-        license.write("""\
-{0} You may enter your license below.
-
-""".format(comment))
-
-        license.close()
-
-
-    def symlink_license(self):
-        """Create local symlinks that point to the global license file."""
-        target = self.global_license_file()
-        for filename in self.license_files:
-            link_name = join_path(self.prefix, filename)
-            if os.path.exists(target):
-                os.symlink(target, link_name)
-                tty.msg("Added local symlink %s to global license file" % link_name)
-
-
     def do_install_dependencies(self, **kwargs):
         # Pass along paths of dependencies here
         for dep in self.spec.dependencies.values():