Make LaTeX fonts more stateless and work with `su`

* LaTeXfonts' tasks only run if necessary
* They run with 'sudo su -c ' so the problem with sudo and su is worked
around.
*

roles/latex/tasks/LaTeXfonts.yml

 ---
-# should be more stateless...
+- name: Check for getnonfreefonts
+  command: /usr/local/bin/getnonfreefonts-sys --version
+  register: gnff_available
+  changed_when: gnff_available.rc != 0
+  ignore_errors: yes
+
 - name: Download common MS fonts
-  get_url: dest=/tmp/ url=https://www.tug.org/fonts/getnonfreefonts/install-getnonfreefonts mode=777
+  get_url:
+    dest: /tmp/
+    url: "https://www.tug.org/fonts/getnonfreefonts/install-getnonfreefonts"
+    mode: 777
   register: tex_fonts_dl_ok
+  when: gnff_available.changed
 
 - name: Install getnonfreefonts
   environment:
     PATH: "{{ lookup('env', 'PATH') }}"
   become: yes
   command: /tmp/install-getnonfreefonts
+  when: gnff_available.changed
+  register: gnff_downloaded
+
+- name: Check installed fonts
+  become: yes
+  command: sudo su -c "/usr/local/bin/getnonfreefonts-sys -l | grep 'not installed'"
+  register: all_fonts
+  changed_when: all_fonts.rc == 0
+  ignore_errors: yes
 
 - name: Install all TeX fonts
   environment:
     PATH: "{{ lookup('env', 'PATH') }}"
   become: yes
-  command: getnonfreefonts-sys -a
+  command: sudo su -c "/usr/local/bin/getnonfreefonts-sys -a"
+  when: all_fonts.changed
 
 - name: Register all TeX fonts
   environment:
     PATH: "{{ lookup('env', 'PATH') }}"
   become: yes
-  command: getnonfreefonts-sys -r
+  command: sudo su -c "/usr/local/bin/getnonfreefonts-sys -r"
+  when: all_fonts.changed
 
 - name: cleanup
   file:
@@ -28,3 +48,4 @@
     dest: "/tmp/{{ item }}"
   with_items:
   - install-getnonfreefonts
+  when: gnff_downloaded.changed

roles/latex/tasks/LateX.yml

@@ -3,15 +3,17 @@
 # not tested yet
 
 - name: Install Fedora's LaTeX
-  dnf: name=texlive state=installed
   become: yes
+  dnf:
+    name: texlive
+    state: installed
   tags: latex
 
 - name: Install LaTeX subpackages
+  become: yes
   dnf:
     name: "{{ item }}"
-    state: latest
-  become: yes
+    state: installed
   with_items: "{{ texlivepackages }}"
   when: ansible_distribution == "Fedora"
 

roles/latex/tasks/neo2.yml

 ---
+- name: create destination directories
+  become: yes
+  file:
+    path: "/usr/share/texlive/texmf-local/{{ item }}/latex/uniinput"
+    state: directory
+    mode: 0755
+  with_items:
+  - tex
+  - doc
+  register: uniinputdir
+
 - name: download uniinput
   get_url:
     url: "{{ item }}"
@@ -6,11 +17,13 @@
   with_items:
   - "http://wiki.neo-layout.org/export/HEAD/latex/Standard-LaTeX/uniinput.dtx"
   - "http://wiki.neo-layout.org/export/HEAD/latex/Standard-LaTeX/uniinput.ins"
+  when: uniinputdir.changed
 
 - name: compile package docu
   command: pdflatex -interaction=nonstopmode uniinput.dtx
   args:
     chdir: /tmp
+    creates: /tmp/uniinput.pdf
   ignore_errors: yes
 
 - name: compile package
@@ -19,16 +32,6 @@
     chdir: /tmp
     creates: /tmp/uniinput.sty
 
-- name: create destination directories
-  file:
-    path: "/usr/share/texlive/texmf-local/{{ item }}/latex/uniinput"
-    state: directory
-    mode: 0755
-  with_items:
-  - tex
-  - doc
-  become: yes
-
 - name: move style to LaTeX dir
   become: yes
   copy:
@@ -39,7 +42,7 @@
 
 - name: move docu to LaTeX dir
   become: yes
-  copy: 
+  copy:
     src: /tmp/uniinput.pdf
     dest: "/usr/share/texlive/texmf-local/doc/latex/uniinput/"
     remote_src: yes