[gimp/wip/Jehan/CI-test-caching] gitlab-ci: adding caching for dependency packages.

[Jehan <jehanp src gnome org>]

commit 963c771e519f0c9b339d46c19c97bc04294eb2f7
Author: Jehan <jehan girinstud io>
Date:   Sat Jan 4 02:09:54 2020 +0100

    gitlab-ci: adding caching for dependency packages.
    
    So far the caching on GNOME's Gitlab does not seem to be working, or I'm
    doing something wrong. But let's still implement it, at least as a demo
    of what doesn't work for reporting a bug and asking to update the Gitlab
    instance settings.

 .gitlab-ci.yml | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c33030cdb4..02b33e7acb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -15,8 +15,9 @@ variables:
 deps-debian/testing:
   stage: dependencies
   cache:
+    key: "${CI_COMMIT_REF_SLUG}-apt"
     paths:
-    - _pacman_cache
+    - apt/
   artifacts:
     expire_in: 1 week
     when: always
@@ -25,6 +26,8 @@ deps-debian/testing:
     - _babl/_build
     - _gegl/_build
   before_script:
+    - ls apt/* || true
+    - echo "Dir::Cache ${CI_PROJECT_DIR}/apt/;" > /etc/apt/apt.conf.d/99gitlab-cache
     - apt-get update
     - apt-get install -y --no-install-recommends
         build-essential
@@ -46,6 +49,7 @@ deps-debian/testing:
         meson
         python3
     - apt-get install -y --reinstall ca-certificates
+    - ls apt/* || true
     - git clone --depth=${GIT_DEPTH} https://gitlab.gnome.org/GNOME/babl.git _babl
     - git clone --depth=${GIT_DEPTH} https://gitlab.gnome.org/GNOME/gegl.git _gegl
     - export PKG_CONFIG_PATH="${INSTALL_PREFIX}/lib/pkgconfig"
@@ -67,6 +71,10 @@ deps-debian/testing:
   stage: gimp
   dependencies:
     - deps-debian/testing
+  cache:
+    key: "${CI_COMMIT_REF_SLUG}-apt"
+    paths:
+    - apt/
   artifacts:
     expire_in: 1 week
     when: always
@@ -75,6 +83,8 @@ deps-debian/testing:
     - _build
     #- "${INSTALL_DIR}"
   before_script:
+    - ls apt/* || true
+    - echo "Dir::Cache ${CI_PROJECT_DIR}/apt/;" > /etc/apt/apt.conf.d/99gitlab-cache
     - apt-get update
     - apt-get install -y --no-install-recommends
         at-spi2-core
@@ -116,6 +126,7 @@ deps-debian/testing:
         mypaint-brushes
         poppler-data
         xvfb
+    - ls apt/* || true
     - export PKG_CONFIG_PATH="${INSTALL_PREFIX}/lib/pkgconfig:${INSTALL_PREFIX}/share/pkgconfig"
     - export PKG_CONFIG_PATH="${INSTALL_PREFIX}/lib/`gcc -print-multiarch`/pkgconfig/:$PKG_CONFIG_PATH"
     - export PKG_CONFIG_PATH="${INSTALL_PREFIX}/share/`gcc -print-multiarch`/pkgconfig/:$PKG_CONFIG_PATH"
@@ -175,10 +186,13 @@ deps-win64:
     XDG_CACHE_HOME: "$CI_PROJECT_DIR/.cache/"
     XDG_DATA_HOME:  "$CI_PROJECT_DIR/.local/share/"
   cache:
+    key: "${CI_COMMIT_REF_SLUG}-dnf"
     paths:
     - .cache/crossroad/
     - dnf_cache
   before_script:
+    - ls .cache/crossroad || true
+    - ls dnf_cache || true
     - dnf install --assumeyes --setopt=cachedir=`pwd`/dnf_cache --verbose
         automake
         autoconf
@@ -207,6 +221,7 @@ deps-win64:
         gdk-pixbuf2
         gdk-pixbuf2-devel
         glib2-devel
+    - ls dnf_cache || true
     #- pip3 install wheel
     #- pip3 install crossroad
     - git clone git://git.tuxfamily.org/gitroot/crossroad/crossroad.git
@@ -217,6 +232,7 @@ deps-win64:
   script:
     - export PATH="`pwd`/.local/bin:$PATH"
     - crossroad w64 gimp --run="build/windows/crossbuild-gitlab-ci/build-deps.sh"
+    - ls .cache/crossroad || true
   artifacts:
     name: "${CI_JOB_NAME}-${CI_COMMIT_REF_NAME}"
     when: always
@@ -234,10 +250,12 @@ gimp-win64:
     XDG_CACHE_HOME: "$CI_PROJECT_DIR/.cache/"
     XDG_DATA_HOME:  "$CI_PROJECT_DIR/.local/share/"
   cache:
+    key: "${CI_COMMIT_REF_SLUG}-dnf"
     paths:
-    - .cache/crossroad/
     - dnf_cache
+    policy: pull
   before_script:
+    - ls dnf_cache || true
     - dnf install --assumeyes --setopt=cachedir=`pwd`/dnf_cache --verbose
         automake
         autoconf
@@ -262,6 +280,7 @@ gimp-win64:
         gdk-pixbuf2
         gdk-pixbuf2-devel
         glib2-devel
+    - ls dnf_cache || true
   script:
     - export PATH="`pwd`/.local/bin:$PATH"
     - mkdir _build && cd _build
@@ -291,10 +310,13 @@ deps-win32:
     XDG_CACHE_HOME: "$CI_PROJECT_DIR/.cache/"
     XDG_DATA_HOME:  "$CI_PROJECT_DIR/.local/share/"
   cache:
+    key: "${CI_COMMIT_REF_SLUG}-dnf"
     paths:
     - .cache/crossroad/
     - dnf_cache
   before_script:
+    - ls .cache/crossroad || true
+    - ls dnf_cache || true
     - dnf install --assumeyes --setopt=cachedir=`pwd`/dnf_cache --verbose
         automake
         autoconf
@@ -350,10 +372,12 @@ gimp-win32:
     XDG_CACHE_HOME: "$CI_PROJECT_DIR/.cache/"
     XDG_DATA_HOME:  "$CI_PROJECT_DIR/.local/share/"
   cache:
+    key: "${CI_COMMIT_REF_SLUG}-dnf"
     paths:
-    - .cache/crossroad/
     - dnf_cache
+    policy: pull
   before_script:
+    - ls dnf_cache || true
     - dnf install --assumeyes --setopt=cachedir=`pwd`/dnf_cache --verbose
         automake
         autoconf