sci-libs/libsigrok: Fix build with IUSE=ruby

Closes: https://bugs.gentoo.org/705074
Package-Manager: Portage-2.3.103, Repoman-2.3.23
Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>

2 files changed, 69 insertions, 2 deletions

diff --git a/sci-libs/libsigrok/files/libsigrok-0.5.2-ruby-swig-docs.patch b/sci-libs/libsigrok/files/libsigrok-0.5.2-ruby-swig-docs.patch
new file mode 100644
index 000000000000..808227a2fffb
--- /dev/null
+++ b/sci-libs/libsigrok/files/libsigrok-0.5.2-ruby-swig-docs.patch
@@ -0,0 +1,63 @@
+From bae9308ec157378bd22ce4f4a0226f1e7ef23594 Mon Sep 17 00:00:00 2001
+From: Anatol Pomozov <anatol.pomozov@gmail.com>
+Date: Mon, 8 Jun 2020 20:46:44 -0700
+Subject: [PATCH] Fix ruby SWIG bindings generation
+
+bindings/swig/doc.py generates a swig interface file for ruby bindings
+that includes docstrings with comments braces ( /* and */ ) like this:
+
+  %feature("docstring") sigrok::Channel::type "/* Type of this channel. */\n";
+  %feature("docstring") sigrok::Channel::enabled "/* Enabled status of this channel. */\n";
+
+SWIG generates *.cxx and adds its own braces to the docstring:
+
+/*/* Document-class: Sigrok::Error
+Exception thrown when an error code is returned by any libsigrok call. */
+*/
+
+this causes compilation error for Ruby bindings.
+
+To fix the error we should not add extra braces to the docstring.
+With this patch libsigrok compiles fine with with ruby 2.7 and swig 4.0.2.
+
+Fixes bug #1526
+
+Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
+---
+ bindings/swig/doc.py | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/bindings/swig/doc.py b/bindings/swig/doc.py
+index e8767af8..182f5477 100644
+--- a/bindings/swig/doc.py
++++ b/bindings/swig/doc.py
+@@ -46,7 +46,7 @@ for compound in index.findall('compound'):
+         if language == 'python':
+             print('%%feature("docstring") %s "%s";' % (class_name, brief))
+         elif language == 'ruby':
+-            print('%%feature("docstring") %s "/* Document-class: %s\\n%s */\\n";' % (class_name, class_name.replace("sigrok", "Sigrok", 1), brief))
++            print('%%feature("docstring") %s "Document-class: %s\\n%s\\n";' % (class_name, class_name.replace("sigrok", "Sigrok", 1), brief))
+         elif language == 'java':
+             print('%%typemap(javaclassmodifiers) %s "/** %s */\npublic class"' % (
+             class_name, brief))
+@@ -77,10 +77,10 @@ for compound in index.findall('compound'):
+                             for name, desc in parameters.items()]) + '";')
+                 if language == 'ruby' and kind == 'public-func':
+                     print(str.join('\n', [
+-                        '%%feature("docstring") %s::%s "/* %s' % (
++                        '%%feature("docstring") %s::%s "%s' % (
+                             class_name, member_name, brief)] + [
+                         '@param %s %s' % (name, desc)
+-                            for name, desc in parameters.items()]) + ' */\\n";')
++                            for name, desc in parameters.items()]) + '\\n";')
+                 elif language == 'java' and kind == 'public-func':
+                         print(str.join('\n', [
+                             '%%javamethodmodifiers %s::%s "/** %s' % (
+@@ -111,4 +111,4 @@ for compound in index.findall('compound'):
+             print('%}')
+     elif language == 'ruby' and constants:
+         for member_name, brief in constants:
+-            print('%%feature("docstring") %s::%s "/* %s */\\n";' % (class_name, member_name, brief))
++            print('%%feature("docstring") %s::%s "%s\\n";' % (class_name, member_name, brief))
+-- 
+2.27.0
diff --git a/sci-libs/libsigrok/libsigrok-0.5.2.ebuild b/sci-libs/libsigrok/libsigrok-0.5.2.ebuild
index 03ae49481eda..7e3111fc54d1 100644
--- a/sci-libs/libsigrok/libsigrok-0.5.2.ebuild
+++ b/sci-libs/libsigrok/libsigrok-0.5.2.ebuild
@@ -67,8 +67,12 @@ DEPEND="${LIB_DEPEND//\[static-libs(+)]}
 
 S="${WORKDIR}"/${P}
 
-# https://sigrok.org/bugzilla/show_bug.cgi?id=1527
-PATCHES=( "${FILESDIR}/${P}-swig-4.patch" )
+PATCHES=(
+	# https://sigrok.org/bugzilla/show_bug.cgi?id=1527
+	"${FILESDIR}/${P}-swig-4.patch"
+	# https://sigrok.org/bugzilla/show_bug.cgi?id=1526
+	"${FILESDIR}/${P}-ruby-swig-docs.patch" # bug 705074
+)
 
 pkg_setup() {
 	use python && python_setup