[libvirt] [jenkins-ci PATCH 4/5] guests: Create ccache symlink farm

[Andrea Bolognani]

ccache can detect the name it's been called with and
transparently invoke the compiler if it matches. The Fedora
package uses this trick to enable ccache out of the box, but
other operating systems and distributions leave the task up
to the user.

Replicate the setup in the user's ~/.ccache directory so
that it works across all guests. With the linke farm in
place, setting $CC in the user's shell profile is no longer
necessary.

Signed-off-by: Andrea Bolognani <abologna at redhat.com>
---
 guests/group_vars/all/main.yml |  2 +-
 guests/tasks/users.yml         | 33 ++++++++++++++++++++++++++++++++-
 guests/templates/bashrc        |  3 ---
 3 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/guests/group_vars/all/main.yml b/guests/group_vars/all/main.yml
index b364acf..cd8ef25 100644
--- a/guests/group_vars/all/main.yml
+++ b/guests/group_vars/all/main.yml
@@ -9,7 +9,7 @@ jenkins_url: https://ci.centos.org/computer/{{ inventory_hostname }}/slave-agent
 # Environment variables and paths to commands/files that might be
 # OS-dependent. Can be overridden on a per-host basis
 VIRT_PREFIX: $HOME/build/libvirt
-PATH: $VIRT_PREFIX/bin:$PATH
+PATH: $VIRT_PREFIX/bin:$HOME/.ccache/bin:$PATH
 C_INCLUDE_PATH: $VIRT_PREFIX/include
 LD_LIBRARY_PATH: $VIRT_PREFIX/lib
 PKG_CONFIG_PATH: $VIRT_PREFIX/lib/pkgconfig
diff --git a/guests/tasks/users.yml b/guests/tasks/users.yml
index e691b32..033ca2a 100644
--- a/guests/tasks/users.yml
+++ b/guests/tasks/users.yml
@@ -53,10 +53,13 @@
 
 - name: '{{ flavor }}: Configure ccache'
   file:
-    path: /home/{{ flavor }}/.ccache
+    path: /home/{{ flavor }}/.{{ item }}
     state: directory
     owner: '{{ flavor }}'
     group: '{{ flavor }}'
+  with_items:
+    - ccache
+    - ccache/bin
 
 - name: '{{ flavor }}: Configure ccache'
   copy:
@@ -65,6 +68,34 @@
     owner: '{{ flavor }}'
     group: '{{ flavor }}'
 
+- name: '{{ flavor }}: Create ccache wrappers'
+  file:
+    src: '{{ ccache }}'
+    dest: /home/{{ flavor }}/.ccache/bin/{{ item }}
+    state: link
+    owner: '{{ flavor }}'
+    group: '{{ flavor }}'
+  with_items:
+    - cc
+    - clang
+  when:
+    - ccache != ''
+    - os_name == 'FreeBSD'
+
+- name: '{{ flavor }}: Create ccache wrappers'
+  file:
+    src: '{{ ccache }}'
+    dest: /home/{{ flavor }}/.ccache/bin/{{ item }}
+    state: link
+    owner: '{{ flavor }}'
+    group: '{{ flavor }}'
+  with_items:
+    - cc
+    - gcc
+  when:
+    - ccache != ''
+    - os_name != 'FreeBSD'
+
 - name: '{{ flavor }}: Create shell profile'
   template:
     src: templates/{{ item }}
diff --git a/guests/templates/bashrc b/guests/templates/bashrc
index 65c82cd..866087e 100644
--- a/guests/templates/bashrc
+++ b/guests/templates/bashrc
@@ -11,12 +11,9 @@ export OSINFO_SYSTEM_DIR="{{ OSINFO_SYSTEM_DIR }}"
 export PERL5LIB="{{ PERL5LIB }}"
 export PYTHONPATH="{{ PYTHONPATH }}"
 
-export CCACHE="{{ ccache }}"
 export MAKE="{{ make }}"
 export PYTHON="{{ python }}"
 
-test "$CCACHE" && export CC="$CCACHE cc"
-
 # Enable bash completion. Only needed on FreeBSD, the system-wide
 # shell profile will take care of it for us everywhere else
 bash_completion=/usr/local/share/bash-completion/bash_completion.sh
-- 
2.14.3