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authorAkira Yokosawa <akiyks@gmail.com>2021-12-29 14:45:29 +0300
committerJonathan Corbet <corbet@lwn.net>2022-02-10 03:00:41 +0300
commitecf5fb58cdcd93b9cf555b95da4ef73b1297de4c (patch)
treea1e7c4db3e69c0f838b881878cff6d7177513f9c /Documentation/sphinx
parentc9edbe1eb98248c290d93aa2ffdc30cab5e2e62c (diff)
downloadlinux-ecf5fb58cdcd93b9cf555b95da4ef73b1297de4c.tar.xz
docs: sphinx/kfigure.py: Add check of 'dot -Tpdf'
To prevent any regression on existing build systems, limit the fallback of converting DOT -> raster PDF only when both of the following conditions are met. o dot(1) doesn't support -Tpdf o rsvg-convert(1) is not found While we are here, add kernellog.verbose messages related to rsvg-convert, 'dot -Tpdf', and 'dot -Tsvg' commands. Suggested-by: Mauro Carvalho Chehab <mchehab@kernel.org> Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Cc: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/e76f61e1-7366-ba00-b119-8ea6a2499861@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/sphinx')
-rw-r--r--Documentation/sphinx/kfigure.py30
1 files changed, 26 insertions, 4 deletions
diff --git a/Documentation/sphinx/kfigure.py b/Documentation/sphinx/kfigure.py
index 955e3ec5de5a..77b0d15dba31 100644
--- a/Documentation/sphinx/kfigure.py
+++ b/Documentation/sphinx/kfigure.py
@@ -51,6 +51,7 @@ import os
from os import path
import subprocess
from hashlib import sha1
+import re
from docutils import nodes
from docutils.statemachine import ViewList
from docutils.parsers.rst import directives
@@ -111,6 +112,8 @@ def pass_handle(self, node): # pylint: disable=W0613
# Graphviz's dot(1) support
dot_cmd = None
+# dot(1) -Tpdf should be used
+dot_Tpdf = False
# ImageMagick' convert(1) support
convert_cmd = None
@@ -165,7 +168,7 @@ def setupTools(app):
This function is called once, when the builder is initiated.
"""
- global dot_cmd, convert_cmd, rsvg_convert_cmd # pylint: disable=W0603
+ global dot_cmd, dot_Tpdf, convert_cmd, rsvg_convert_cmd # pylint: disable=W0603
kernellog.verbose(app, "kfigure: check installed tools ...")
dot_cmd = which('dot')
@@ -174,6 +177,16 @@ def setupTools(app):
if dot_cmd:
kernellog.verbose(app, "use dot(1) from: " + dot_cmd)
+
+ try:
+ dot_Thelp_list = subprocess.check_output([dot_cmd, '-Thelp'],
+ stderr=subprocess.STDOUT)
+ except subprocess.CalledProcessError as err:
+ dot_Thelp_list = err.output
+ pass
+
+ dot_Tpdf_ptn = b'pdf'
+ dot_Tpdf = re.search(dot_Tpdf_ptn, dot_Thelp_list)
else:
kernellog.warn(app, "dot(1) not found, for better output quality install "
"graphviz from https://www.graphviz.org")
@@ -185,9 +198,17 @@ def setupTools(app):
"ImageMagick (https://www.imagemagick.org)")
if rsvg_convert_cmd:
kernellog.verbose(app, "use rsvg-convert(1) from: " + rsvg_convert_cmd)
+ kernellog.verbose(app, "use 'dot -Tsvg' and rsvg-convert(1) for DOT -> PDF conversion")
+ dot_Tpdf = False
else:
- kernellog.verbose(app, "rsvg-convert(1) not found, "
- "falling back to raster image conversion")
+ kernellog.verbose(app,
+ "rsvg-convert(1) not found.\n"
+ " SVG -> PDF conversion by convert() can be poor quality.\n"
+ " Install librsvg (https://gitlab.gnome.org/GNOME/librsvg)")
+ if dot_Tpdf:
+ kernellog.verbose(app, "use 'dot -Tpdf' for DOT -> PDF conversion")
+ else:
+ kernellog.verbose(app, "use 'dot -Tsvg' and convert(1) for DOT -> PDF conversion")
# integrate conversion tools
@@ -277,11 +298,12 @@ def convert_image(img_node, translator, src_fname=None):
if in_ext == '.dot':
kernellog.verbose(app, 'convert DOT to: {out}/' + _name)
- if translator.builder.format == 'latex':
+ if translator.builder.format == 'latex' and not dot_Tpdf:
svg_fname = path.join(translator.builder.outdir, fname + '.svg')
ok1 = dot2format(app, src_fname, svg_fname)
ok2 = svg2pdf_by_rsvg(app, svg_fname, dst_fname)
ok = ok1 and ok2
+
else:
ok = dot2format(app, src_fname, dst_fname)