linux-kernel - [PATCH 5/8] scripts/sphinx-pre-install: cleanup Gentoo checks

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Date:   Sun, 14 Jul 2019 12:10:10 -0300
From:   Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
To:     Linux Doc Mailing List <linux-doc@...r.kernel.org>
Cc:     Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...radead.org>,
        linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>
Subject: [PATCH 5/8] scripts/sphinx-pre-install: cleanup Gentoo checks

On Gentoo, the portage changes for ImageMagick to work are
always suggested, even if already applied. While the two
extra commands should be harmless, add a check to avoid
reporting it without need.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
---
 scripts/sphinx-pre-install | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/scripts/sphinx-pre-install b/scripts/sphinx-pre-install
index 8dc13fe95ffe..0a5c83aa5f44 100755
--- a/scripts/sphinx-pre-install
+++ b/scripts/sphinx-pre-install
@@ -533,8 +533,19 @@ sub give_gentoo_hints()
 	return if (!$need && !$optional);
 
 	printf("You should run:\n\n");
-	printf("\tsudo su -c 'echo \"media-gfx/imagemagick svg png\" > /etc/portage/package.use/imagemagick'\n");
-	printf("\tsudo su -c 'echo \"media-gfx/graphviz cairo pdf\" > /etc/portage/package.use/graphviz'\n");
+
+	my $imagemagick = "media-gfx/imagemagick svg png";
+	my $cairo = "media-gfx/graphviz cairo pdf";
+	my $portage_imagemagick = "/etc/portage/package.use/imagemagick";
+	my $portage_cairo = "/etc/portage/package.use/graphviz";
+
+	if (qx(cat $portage_imagemagick) ne "$imagemagick\n") {
+		printf("\tsudo su -c 'echo \"$imagemagick\" > $portage_imagemagick'\n")
+	}
+	if (qx(cat $portage_cairo) ne  "$cairo\n") {
+		printf("\tsudo su -c 'echo \"$cairo\" > $portage_cairo'\n");
+	}
+
 	printf("\tsudo emerge --ask $install\n");
 
 }
-- 
2.21.0