sphinx-pre-install: use a requirements file

Instead of using 3 commands to install a virtualenv, use
a single one, reading the requirements from this file:

	Documentation/sphinx/requirements.txt

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

2 files changed, 5 insertions, 3 deletions

diff --git a/Documentation/sphinx/requirements.txt b/Documentation/sphinx/requirements.txt
new file mode 100644
index 000000000000..742be3e12619
--- /dev/null
+++ b/Documentation/sphinx/requirements.txt
@@ -0,0 +1,3 @@
+docutils==0.12
+Sphinx==1.4.9
+sphinx_rtd_theme
diff --git a/scripts/sphinx-pre-install b/scripts/sphinx-pre-install
index bcd6f7978f8d..230d9cc7ee1d 100755
--- a/scripts/sphinx-pre-install
+++ b/scripts/sphinx-pre-install
@@ -14,6 +14,7 @@ use strict;
 # GNU General Public License for more details.
 
 my $virtenv_dir = "sphinx_1.4";
+my $requirement_file = "Documentation/sphinx/requirements.txt";
 
 #
 # Static vars
@@ -467,9 +468,7 @@ sub check_needs()
 
 			printf "\t$virtualenv $virtenv_dir\n";
 			printf "\t. $activate\n";
-			printf "\tpip install 'docutils==0.12'\n";
-			printf "\tpip install 'Sphinx==1.4.9'\n";
-			printf "\tpip install sphinx_rtd_theme\n";
+			printf "\tpip install -r $requirement_file\n";
 			$need++;
 		}
 	}