sphinx-pre-install: detect an existing virtualenv

Detect if the script runs after creating the virtualenv,
printing the command line commands to enable the virtualenv.

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

1 files changed, 18 insertions, 10 deletions

diff --git a/scripts/sphinx-pre-install b/scripts/sphinx-pre-install
index 5fe3b4a86174..bcd6f7978f8d 100755
--- a/scripts/sphinx-pre-install
+++ b/scripts/sphinx-pre-install
@@ -13,6 +13,8 @@ use strict;
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 
+my $virtenv_dir = "sphinx_1.4";
+
 #
 # Static vars
 #
@@ -454,16 +456,22 @@ sub check_needs()
                        which("sphinx-build-3");
         }
         if ($need_sphinx) {
-                my $virtualenv = findprog("virtualenv-3");
-                $virtualenv = findprog("virtualenv") if (!$virtualenv);
-                $virtualenv = "virtualenv" if (!$virtualenv);
-
-                printf "\t$virtualenv sphinx_1.4\n";
-                printf "\t. sphinx_1.4/bin/activate\n";
-                printf "\tpip install 'docutils==0.12'\n";
-                printf "\tpip install 'Sphinx==1.4.9'\n";
-                printf "\tpip install sphinx_rtd_theme\n";
-                $need++;
+                my $activate = "$virtenv_dir/bin/activate";
+                if (-e "$ENV{'PWD'}/$activate") {
+                        printf "\nNeed to activate virtualenv with:\n";
+                        printf "\t. $activate\n";
+                } else {
+                        my $virtualenv = findprog("virtualenv-3");
+                        $virtualenv = findprog("virtualenv") if (!$virtualenv);
+                        $virtualenv = "virtualenv" if (!$virtualenv);
+
+                        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";
+                        $need++;
+                }
         }
         printf "\n";