Fix evaluation error in Qt/KDE packages

For now, the source hashes will continue to be stored in the Nixpkgs
tree. The package update instructions are updated.

maintainers/scripts/fetch-kde-qt.sh

@@ -0,0 +1,49 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p coreutils findutils gnused nix wget
+
+tmp=$(mktemp -d)
+pushd $tmp >/dev/null
+wget -nH -r -c --no-parent "$@" >/dev/null
+
+csv=$(mktemp)
+find . -type f | while read src; do
+    # Sanitize file name
+    filename=$(basename "$src" | tr '@' '_')
+    nameVersion="${filename%.tar.*}"
+    name=$(echo "$nameVersion" | sed -e 's,-[[:digit:]].*,,' | sed -e 's,-opensource-src$,,')
+    version=$(echo "$nameVersion" | sed -e 's,^\([[:alpha:]][[:alnum:]]*-\)\+,,')
+    echo "$name,$version,$src,$filename" >>$csv
+done
+
+cat <<EOF
+# DO NOT EDIT! This file is generated automatically by fetchsrcs.sh
+{ fetchurl, mirror }:
+
+{
+EOF
+
+gawk -F , "{ print \$1 }" $csv | sort | uniq | while read name; do
+    versions=$(gawk -F , "/^$name,/ { print \$2 }" $csv)
+    latestVersion=$(echo "$versions" | sort -rV | head -n 1)
+    src=$(gawk -F , "/^$name,$latestVersion,/ { print \$3 }" $csv)
+    filename=$(gawk -F , "/^$name,$latestVersion,/ { print \$4 }" $csv)
+    url="${src:2}"
+    sha256=$(nix-hash --type sha256 --base32 --flat "$src")
+    cat <<EOF
+  $name = {
+    version = "$latestVersion";
+    src = fetchurl {
+      url = "\${mirror}/$url";
+      sha256 = "$sha256";
+      name = "$filename";
+    };
+  };
+EOF
+done
+
+echo "}"
+
+popd >/dev/null
+rm -fr $tmp >/dev/null
+
+rm -f $csv >/dev/null

maintainers/scripts/generate-kde-applications.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+./fetch-kde-qt.sh http://download.kde.org/stable/applications/16.04.2/ -A '*.tar.xz'

maintainers/scripts/generate-kde-frameworks.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+./fetch-kde-qt.sh http://download.kde.org/stable/frameworks/5.22/ -A '*.tar.xz'

maintainers/scripts/generate-kde-plasma.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+./fetch-kde-qt.sh http://download.kde.org/stable/plasma/5.6.5/ -A '*.tar.xz'

maintainers/scripts/generate-qt.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+./fetch-kde-qt.sh http://download.qt.io/official_releases/qt/5.6/5.6.1/submodules/ -A '*.tar.xz'