gitlab-ci, build: Move appimage code out of gitlab-ci and reduce verbosity

This should be enough to not "annoy" developers with repetitive ninja and
not too relevant appimagetool output. This makes easier to devs to look at
the runner log without needing to revert 9653e50e (the revert/split would
make us lose .appimage in some custom Deb pipelines and 50% of ccache hits).

.gitlab-ci.yml

@@ -292,20 +292,8 @@ gimp-debian-x64:
     - if [ "$VARIANT" != "-gcc" ] && [ "$VARIANT" != "-raster" ] && [ "$CI_PIPELINE_SOURCE" != "merge_request_event" ]; then
         ninja dist;
       fi
-    # Make sure that GIMP is testable locally on Debian
-    # We apply these patches otherwise appstream-cli get confused
-    # with (non-reverse) DNS naming and fails. That's not a GIMP bug, see: #6798
-    - cd ..
-    - git apply -v build/linux/appimage/patches/0001-desktop-po-Use-reverse-DNS-naming.patch
-    - cd gimp-data
-    - git apply -v ../build/linux/appimage/patches/0001-images-logo-Use-reverse-DNS-naming.patch
-    - cd ..
-    - meson configure _build -Drelocatable-bundle=yes -Dvector-icons=true
-    - cd _build
-    - ninja
-    - ninja install
-    - ccache --show-stats
     - cd ..
+    # Make sure that any Debian pipeline is easily testable locally on Debian
     - bash build/linux/appimage/2_bundle-gimp-appimage.sh
   artifacts:
     expose_as: 'Linux appimage'

build/linux/appimage/2_bundle-gimp-appimage.sh

@@ -6,6 +6,49 @@
 
 set -e
 
+if [ -z "$GITLAB_CI" ]; then
+  # Make the script work locally
+  if [ "$0" != 'build/linux/appimage/2_bundle-gimp-appimage.sh' ] && [ ${PWD/*\//} != 'appimage' ]; then
+    echo -e '\033[31m(ERROR)\033[0m: Script called from wrong dir. Please, call this script from the root of gimp git dir'
+    exit 1
+  elif [ ${PWD/*\//} = 'appimage' ]; then
+    cd ../../..
+  fi
+fi
+
+
+# SPECIAL BUILDING
+
+## We apply these patches otherwise appstream-cli get confused with
+## (non-reverse) DNS naming and fails. That's NOT a GIMP bug, see: #6798
+echo '(INFO): patching GIMP with reverse DNS naming'
+git apply -v build/linux/appimage/patches/0001-desktop-po-Use-reverse-DNS-naming.patch >/dev/null 2>&1
+cd gimp-data
+git apply -v ../build/linux/appimage/patches/0001-images-logo-Use-reverse-DNS-naming.patch >/dev/null 2>&1
+cd ..
+
+## Prepare env. Universal variables from .gitlab-ci.yml
+IFS=$'\n' VAR_ARRAY=($(cat .gitlab-ci.yml | sed -n '/export PATH=/,/GI_TYPELIB_PATH}\"/p' | sed 's/    - //'))
+IFS=$' \t\n'
+for VAR in "${VAR_ARRAY[@]}"; do
+  eval "$VAR" || continue
+done
+
+## Rebuild GIMP
+echo '(INFO): rebuilding GIMP as relocatable'
+meson configure _build -Drelocatable-bundle=yes -Dvector-icons=true >/dev/null 2>&1
+mkdir -p build/linux/appimage/_Output
+cd _build
+ninja &> ../build/linux/appimage/_Output/ninja.log
+if [ $? -ne 0 ]; then
+  cat ../build/linux/appimage/_Output/ninja.log
+else
+  rm ../build/linux/appimage/_Output/ninja.log
+fi
+ninja install >/dev/null 2>&1
+ccache --show-stats
+cd ..
+
 
 # AGNOSTIC VARIABLES (only touch them to make even more portable, without casuistry)
 
@@ -21,18 +64,10 @@ elif [ "$1" = "AppDir" ]; then
   OPT_PREFIX="${GIMP_DISTRIB}"
 fi
 
-## This script is distro-agnostic too. We take universal variables from .gitlab-ci.yml
-IFS=$'\n' VAR_ARRAY=($(cat .gitlab-ci.yml | sed -n '/export PATH=/,/GI_TYPELIB_PATH}\"/p' | sed 's/    - //'))
-IFS=$' \t\n'
-for VAR in "${VAR_ARRAY[@]}"; do
-  eval "$VAR" || continue
-done
-
-
 #(MOSTLY) AGNOSTIC FUNCTIONS
 prep_pkg ()
 {
-  apt-get install -y --no-install-recommends $1
+  apt-get install -y --no-install-recommends $1 >/dev/null 2>&1
 }
 
 find_bin ()
@@ -43,6 +78,7 @@ find_bin ()
 
 find_lib ()
 {
+  mkdir -p $OPT_PREFIX/${LIB_DIR}/${LIB_SUBDIR}
   find /usr/${LIB_DIR}/${LIB_SUBDIR} -maxdepth 1 -name ${1} -execdir cp -r '{}' $OPT_PREFIX/${LIB_DIR}/${LIB_SUBDIR} \;
   find /usr/${LIB_DIR} -maxdepth 1 -name ${1} -execdir cp -r '{}' $OPT_PREFIX/${LIB_DIR}/${LIB_SUBDIR} \;
   find /${LIB_DIR}/${LIB_SUBDIR} -maxdepth 1 -name ${1} -execdir cp -r '{}' $OPT_PREFIX/${LIB_DIR}/${LIB_SUBDIR} \;
@@ -64,21 +100,22 @@ conf_app ()
 
 
 # PREPARE ENVIRONMENT
-apt-get install -y --no-install-recommends wget
+apt-get install -y --no-install-recommends wget >/dev/null 2>&1
 
 ## For now, we always use the latest version of go-appimagetool
-wget -c https://github.com/$(wget -q https://github.com/probonopd/go-appimage/releases/expanded_assets/continuous -O - | grep "appimagetool-.*-x86_64.AppImage" | head -n 1 | cut -d '"' -f 2)
+wget -c https://github.com/$(wget -q https://github.com/probonopd/go-appimage/releases/expanded_assets/continuous -O - | grep "appimagetool-.*-x86_64.AppImage" | head -n 1 | cut -d '"' -f 2) >/dev/null 2>&1
 mv *.AppImage appimagetool.appimage
 go_appimagetool=appimagetool.appimage
 chmod +x "$go_appimagetool"
 
 ## go-appimagetool have buggy appstreamcli so we need to use the legacy one
 legacy_appimagetool="appimagetool-x86_64.AppImage"
-wget "https://github.com/AppImage/AppImageKit/releases/download/continuous/$legacy_appimagetool"
+wget "https://github.com/AppImage/AppImageKit/releases/download/continuous/$legacy_appimagetool" >/dev/null 2>&1
 chmod +x "$legacy_appimagetool"
 
 
 # BUNDLE FILES
+echo '(INFO): making .appimage bundle'
 
 ## System base (needed to use GIMP or to avoid polluting the terminal output)
 conf_app LD_LINUX "/usr" "lib64/ld-*.so.*"
@@ -135,7 +172,7 @@ conf_app PYTHONPATH "/usr" "${LIB_DIR}/${LIB_SUBDIR}python3.11"
 
 ## Final adjustments
 ### Auto detect and copy deps of binaries copied above
-"./$go_appimagetool" --appimage-extract-and-run -s deploy $OPT_PREFIX/share/applications/org.gimp.GIMP.desktop
+"./$go_appimagetool" --appimage-extract-and-run -s deploy $OPT_PREFIX/share/applications/org.gimp.GIMP.desktop >/dev/null 2>&1
 ### Rearranje babl, GEGL and GIMP (only the needed files)
 if [ -z "$2" ] || [ "$2" = "usr" ]; then
   cp -r $GIMP_DISTRIB/etc $GIMP_PREFIX
@@ -193,7 +230,6 @@ fi
 
 
 # MAKE APPIMAGE
-"./$legacy_appimagetool" --appimage-extract-and-run $GIMP_DISTRIB # -u "zsync|https://download.gimp.org/gimp/v${GIMP_APP_VERSION}/GIMP-latest-$(uname -m).AppImage.zsync"
+"./$legacy_appimagetool" --appimage-extract-and-run $GIMP_DISTRIB &> build/linux/appimage/_Output/appimagetool.log # -u "zsync|https://download.gimp.org/gimp/v${GIMP_APP_VERSION}/GIMP-latest-$(uname -m).AppImage.zsync"
-mkdir build/linux/appimage/_Output
 GIMP_VERSION=$(grep GIMP_VERSION _build/config.h | head -1 | sed 's/^.*"\([^"]*\)"$/\1/')
 mv GNU*.AppImage build/linux/appimage/_Output/GIMP-${GIMP_VERSION}-$(uname -m).AppImage