From 834d12226bed90800c0ee7886c0b90e65d070f97 Mon Sep 17 00:00:00 2001
From: Thomas Danckaert <thomas.danckaert@gmail.com>
Date: Tue, 6 Dec 2016 14:55:39 +0100
Subject: gnu: kdbusaddons: Embed kinit store dir, avoid dependency cycles.
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kdbusaddons needs to know the location of the kdeinit5 executable,
provided by kinit. kinit depends on kdbusaddons, so we add bootstrap
versions of all packages in the dependency chain from kinit to
kdbusaddons to avoid cyclic dependencies.

* gnu/packages/kde-frameworks.scm (kinit-bootstrap,
  kdbusaddons-bootstrap): New variables.
  (kdbusaddons)[inputs]: Add kinit-bootstrap.
  [source,arguments]: Add patch and substitution to embed
  kinit-bootstrap's store directory in the code.
* gnu/packages/patches/kdbusaddons-kinit-file-name.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
---
 gnu/local.mk                                       |  1 +
 gnu/packages/kde-frameworks.scm                    | 36 ++++++++++++++++++++--
 .../patches/kdbusaddons-kinit-file-name.patch      | 15 +++++++++
 3 files changed, 49 insertions(+), 3 deletions(-)
 create mode 100644 gnu/packages/patches/kdbusaddons-kinit-file-name.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index c076ab969d..3a56c840bc 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -639,6 +639,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/isl-0.11.1-aarch64-support.patch	\
   %D%/packages/patches/jbig2dec-ignore-testtest.patch		\
   %D%/packages/patches/jq-CVE-2015-8863.patch			\
+  %D%/packages/patches/kdbusaddons-kinit-file-name.patch	\
   %D%/packages/patches/khmer-use-libraries.patch                \
   %D%/packages/patches/kmod-module-directory.patch		\
   %D%/packages/patches/kobodeluxe-paths.patch			\
diff --git a/gnu/packages/kde-frameworks.scm b/gnu/packages/kde-frameworks.scm
index 8b841330b8..94145fb95d 100644
--- a/gnu/packages/kde-frameworks.scm
+++ b/gnu/packages/kde-frameworks.scm
@@ -25,6 +25,7 @@ (define-module (gnu packages kde-frameworks)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
   #:use-module (guix utils)
+  #:use-module (gnu packages)
   #:use-module (gnu packages acl)
   #:use-module (gnu packages admin)
   #:use-module (gnu packages attr)
@@ -50,7 +51,8 @@ (define-module (gnu packages kde-frameworks)
   #:use-module (gnu packages version-control)
   #:use-module (gnu packages web)
   #:use-module (gnu packages xml)
-  #:use-module (gnu packages xorg))
+  #:use-module (gnu packages xorg)
+  #:use-module (srfi srfi-1))
 
 (define-public extra-cmake-modules
   (package
@@ -516,7 +518,8 @@ (define-public kdbusaddons
                     name "-" version ".tar.xz"))
               (sha256
                (base32
-                "07mzb1xr8wyiid25p8kg6mjp6vq8ngvv1ikhq75zvd2cbax530c8"))))
+                "07mzb1xr8wyiid25p8kg6mjp6vq8ngvv1ikhq75zvd2cbax530c8"))
+              (patches (search-patches "kdbusaddons-kinit-file-name.patch"))))
     (build-system cmake-build-system)
     (native-inputs
      `(("extra-cmake-modules" ,extra-cmake-modules)
@@ -524,10 +527,18 @@ (define-public kdbusaddons
        ("qttools" ,qttools)))
     (inputs
      `(("qtbase" ,qtbase)
-       ("qtx11extras" ,qtx11extras)))
+       ("qtx11extras" ,qtx11extras)
+       ("kinit" ,kinit-bootstrap))) ;; kinit-bootstrap: kinit package which does not depend on kdbusaddons.
     (arguments
      `(#:phases
        (modify-phases %standard-phases
+         (add-before
+          'configure 'patch-source
+          (lambda* (#:key inputs #:allow-other-keys)
+            ;; look for the kdeinit5 executable in kinit's store directory,
+            ;; instead of the current application's directory:
+            (substitute* "src/kdeinitinterface.cpp"
+              (("@SUBSTITUTEME@") (assoc-ref inputs "kinit")))))
          (replace 'check
            (lambda _
              (setenv "DBUS_FATAL_WARNINGS" "0")
@@ -2866,3 +2877,22 @@ (define-public plasma-framework
 script engines.")
     ;; dual licensed
     (license (list license:gpl2+ license:lgpl2.1+))))
+
+;; This version of kdbusaddons does not use kinit as an input, and is used to
+;; build kinit-bootstrap, as well as bootstrap versions of all kinit
+;; dependencies which also rely on kdbusaddons.
+(define kdbusaddons-bootstrap
+  (package
+    (inherit kdbusaddons)
+    (source (origin
+              (inherit (package-source kdbusaddons))
+              (patches '())))
+    (inputs (alist-delete "kinit" (package-inputs kdbusaddons)))
+    (arguments
+     (substitute-keyword-arguments (package-arguments kdbusaddons)
+       ((#:phases phases)
+        `(modify-phases ,phases
+           (delete 'patch-source)))))))
+
+(define kinit-bootstrap
+  ((package-input-rewriting `((,kdbusaddons . ,kdbusaddons-bootstrap))) kinit))
diff --git a/gnu/packages/patches/kdbusaddons-kinit-file-name.patch b/gnu/packages/patches/kdbusaddons-kinit-file-name.patch
new file mode 100644
index 0000000000..ffed88e043
--- /dev/null
+++ b/gnu/packages/patches/kdbusaddons-kinit-file-name.patch
@@ -0,0 +1,15 @@
+Add placeholder for kinit's store file name.
+
+diff --git a/src/kdeinitinterface.cpp b/src/kdeinitinterface.cpp
+index 22fa5e5..3d40937 100644
+--- a/src/kdeinitinterface.cpp
++++ b/src/kdeinitinterface.cpp
+@@ -52,7 +52,7 @@ void KDEInitInterface::ensureKdeinitRunning()
+     // If not found in system paths, search other paths
+     if (srv.isEmpty()) {
+         const QStringList searchPaths = QStringList()
+-            << QCoreApplication::applicationDirPath() // then look where our application binary is located
++            << QString::fromUtf8("@SUBSTITUTEME@/bin") // using QStringLiteral would be more efficient, but breaks guix store reference detection.
+             << QLibraryInfo::location(QLibraryInfo::BinariesPath); // look where exec path is (can be set in qt.conf)
+         srv = QStandardPaths::findExecutable(QStringLiteral("kdeinit5"), searchPaths);
+         if (srv.isEmpty()) {
-- 
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