sys-apps/usbguard: [QA] unconditionally install completion files

QA policy [0] says that we don't conditionalise installation of
small files. It's a wasteful rebuild and inconsistent across packages
for when users desire completions to be available.

[0] https://projects.gentoo.org/qa/policy-guide/installed-files.html#pg0301
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 109 insertions, 3 deletions

diff --git a/sys-apps/usbguard/files/usbguard-1.0.0-bash-completion-configure.patch b/sys-apps/usbguard/files/usbguard-1.0.0-bash-completion-configure.patch
new file mode 100644
index 000000000000..c63a85f23a50
--- /dev/null
+++ b/sys-apps/usbguard/files/usbguard-1.0.0-bash-completion-configure.patch
@@ -0,0 +1,105 @@
+https://github.com/USBGuard/usbguard/pull/483
+
+From b3bb39e0e5de61e1c713cb98ebca5e4c6529e2b9 Mon Sep 17 00:00:00 2001
+From: Sam James <sam@gentoo.org>
+Date: Sun, 18 Jul 2021 03:42:21 +0100
+Subject: [PATCH] configure.ac: Use standard --with-bash-completion-dir option
+
+Rationale:
+This makes it a lot easier to enable/disable installation
+of bash completion files rather than it being based on
+a certain package being installed (or not). It's useful
+in Gentoo Linux for example where we may want to always
+install Bash completion files to the right location, even
+if the user isn't using it yet, to save rebuilds.
+
+This makes a few changes to the current Bash completion logic, mainly:
+* Falls back gracefully to a standard directory if bash-completion
+  itself is not installed (in that case, we can't ask it via pkgconfig
+  where to place files).
+
+* So the behaviour is now:
+  * no argument / --with-bash-completion-dir=yes:
+
+    Asks pkgconfig, but falls back to standard directory.
+
+  * --with-bash-completion-dir=dir:
+
+    Use the given directory with no detection.
+
+  * --without-bash-completion-dir:
+
+    No installation of Bash completion files.
+
+Signed-off-by: Sam James <sam@gentoo.org>
+---
+ Makefile.am  |  2 +-
+ configure.ac | 32 ++++++++++++++------------------
+ 2 files changed, 15 insertions(+), 19 deletions(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index 34a2e96..910c3c5 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -438,7 +438,7 @@ usbguard_LDADD=\
+ 	$(top_builddir)/libusbguard.la \
+ 	${PTHREAD_LIBS}
+ 
+-if BASH_COMPLETION_ENABLED
++if ENABLE_BASH_COMPLETION
+ bashcompletiondir = $(BASH_COMPLETION_DIR)
+ dist_bashcompletion_DATA = $(top_srcdir)/scripts/bash_completion/usbguard
+ endif
+diff --git a/configure.ac b/configure.ac
+index 73021b6..4207ae2 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -663,11 +663,18 @@ AC_ARG_ENABLE([systemd],
+        *) AC_MSG_ERROR([bad value ${enableval} for --enable-systemd]) ;;
+      esac], [systemd=no])
+ 
+-
+-PKG_CHECK_MODULES([BASH_COMPLETION], [bash-completion >= 2.0],
+-  [bash_completion_dir="`$PKG_CONFIG --variable=completionsdir bash-completion`"
+-   bash_completion=yes],
+-  [bash_completion=no])
++AC_ARG_WITH([bash-completion-dir],
++	AS_HELP_STRING([--with-bash-completion-dir[=PATH]],
++		[Enable bash auto-completion. Uses pkgconfig if no path given. @<:@default=yes@:>@]),
++	[], [with_bash_completion_dir=yes])
++
++if test "x$with_bash_completion_dir" = "xyes"; then
++	PKG_CHECK_MODULES([BASH_COMPLETION], [bash-completion >= 2.0],
++		[BASH_COMPLETION_DIR=$($PKG_CONFIG --variable=completionsdir bash-completion)],
++		[BASH_COMPLETION_DIR="$datadir/bash-completion/completions"])
++else
++	BASH_COMPLETION_DIR="$with_bash_completion_dir"
++fi
+ 
+ if test "x$debug" = xyes; then
+    CXXFLAGS="$CXXFLAGS $CXXFLAGS_DEBUG_ENABLED"
+@@ -706,19 +713,8 @@ fi
+ 
+ AC_SUBST([ANALYZE_CONFIGURE_ARGS], $ac_configure_args)
+ 
+-case "$bash_completion_dir" in
+-  /usr/share/*|/usr/local/share/*)
+-    bash_completion_dir=$(echo "$bash_completion_dir" | sed -r 's,^(/usr/share|/usr/local/share),${datadir},')
+-    ;;
+-  /usr/*|/usr/local/*)
+-    bash_completion_dir=$(echo "$bash_completion_dir" | sed -r 's,^(/usr|/usr/local),${prefix},')
+-    ;;
+-  /*)
+-    bash_completion_dir='${prefix}'"$bash_completion_dir"
+-    ;;
+-esac
+-
+-AC_SUBST([BASH_COMPLETION_DIR], $bash_completion_dir)
++AC_SUBST([BASH_COMPLETION_DIR])
++AM_CONDITIONAL([ENABLE_BASH_COMPLETION], [test "x$with_bash_completion_dir" != "xno"])
+ 
+ AM_CONDITIONAL([SYSTEMD_SUPPORT_ENABLED], [test "x$systemd" = xyes ])
+ AM_CONDITIONAL([DBUS_ENABLED], [test "x$with_dbus" = xyes ])
+-- 
+2.32.0
+
diff --git a/sys-apps/usbguard/usbguard-1.0.0-r1.ebuild b/sys-apps/usbguard/usbguard-1.0.0-r2.ebuild
index 45cb81c1a51a..cf0a6c5a14dd 100644
--- a/sys-apps/usbguard/usbguard-1.0.0-r1.ebuild
+++ b/sys-apps/usbguard/usbguard-1.0.0-r2.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=7
 
-inherit autotools
+inherit autotools bash-completion-r1
 
 DESCRIPTION="Daemon protecting your computer against BadUSB"
 HOMEPAGE="https://github.com/USBGuard/usbguard"
@@ -12,7 +12,7 @@ SRC_URI="https://github.com/USBGuard/usbguard/releases/download/${P}/${P}.tar.gz
 LICENSE="GPL-2+"
 SLOT="0/1"  # due to libusbguard.so.<1>.0.0
 KEYWORDS="~amd64 ~x86"
-IUSE="bash-completion dbus ldap policykit static-libs systemd test umockdev"
+IUSE="dbus ldap policykit static-libs systemd test umockdev"
 
 REQUIRED_USE="policykit? ( dbus )"
 
@@ -29,7 +29,6 @@ CDEPEND="
 	>=sys-libs/libcap-ng-0.7.0
 	>=sys-libs/libseccomp-2.0.0
 	>=sys-process/audit-2.7.7
-	bash-completion? ( >=app-shells/bash-completion-2.0 )
 	dbus? (
 		dev-libs/glib:2
 		sys-apps/dbus
@@ -56,6 +55,7 @@ RESTRICT="!test? ( test )"
 
 PATCHES=(
 	"${FILESDIR}"/${PN}-1.0.0-pthreads-link.patch
+	"${FILESDIR}"/${PN}-1.0.0-bash-completion-configure.patch
 )
 
 src_prepare() {
@@ -65,6 +65,7 @@ src_prepare() {
 
 src_configure() {
 	local myargs=(
+		--with-bash-completion-dir=$(get_bashcompdir)
 		$(use_with dbus)
 		$(use_with ldap)
 		$(use_with policykit polkit)