From c5d71a1889ee1edfb648903bcee561c5fbadd82d Mon Sep 17 00:00:00 2001
From: Simon McVittie <smcv@collabora.com>
Date: Thu, 4 Oct 2018 10:50:37 +0100
Subject: ci: Use ccache to speed up repeated builds

Signed-off-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit d0728fd06e5a2302e7596e3df56b68b0a0834fd7)
---
 .gitignore          |  1 +
 .gitlab-ci.yml      | 10 ++++++++++
 tools/ci-install.sh |  1 +
 3 files changed, 12 insertions(+)

diff --git a/.gitignore b/.gitignore
index 6398e77c..04c276c1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 *.rej
 *.o
 *~
+/.ccache/
 /build-aux/
 compile
 config.cache
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2c042aa2..96d632d6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -27,6 +27,16 @@ stages:
 
 before_script:
   - ./tools/ci-install.sh
+  - mkdir -p .ccache
+  - export CCACHE_BASEDIR="$(pwd)"
+  - export CCACHE_DIR="$CCACHE_BASEDIR/.ccache"
+  # Debian's ccache package creates symlinks here for all supported
+  # compilers
+  - export PATH="/usr/lib/ccache:$PATH"
+
+cache:
+  paths:
+    - .ccache/
 
 variables:
   ci_in_docker: "yes"
diff --git a/tools/ci-install.sh b/tools/ci-install.sh
index 2e2946fc..30d4abe0 100755
--- a/tools/ci-install.sh
+++ b/tools/ci-install.sh
@@ -126,6 +126,7 @@ case "$ci_distro" in
             autoconf-archive \
             automake \
             autotools-dev \
+            ccache \
             cmake \
             debhelper \
             dh-autoreconf \
-- 
cgit v1.2.1