Try to fix

This reverts commit f25816f2d5.

.travis.yml

@@ -87,13 +87,7 @@ jobs:
         - ./check_unused_assets.py
         - gitbook install
         - gitbook build
-        - for i in 1 2 3 4; do gitbook pdf ./ _book/clover.pdf && break || sleep 1; done
+        - gitbook pdf ./ _book/clover.pdf
-        - sudo apt-get install ghostscript
-        - gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/default -dNOPAUSE -dQUIET -dBATCH -dDetectDuplicateImages -dCompressFonts=true -r150 -sOutputFile=_book/clover_ru_compressed.pdf _book/clover_ru.pdf
-        - gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/default -dNOPAUSE -dQUIET -dBATCH -dDetectDuplicateImages -dCompressFonts=true -r150 -sOutputFile=_book/clover_en_compressed.pdf _book/clover_en.pdf
-        - rm _book/clover_ru.pdf && mv _book/clover_ru_compressed.pdf _book/clover_ru.pdf
-        - rm _book/clover_en.pdf && mv _book/clover_en_compressed.pdf _book/clover_en.pdf
-        - ls -lah _book/clover*.pdf
       deploy:
         provider: pages
         local_dir: _book

builder/image-ros.sh

@@ -13,7 +13,7 @@
 # copies or substantial portions of the Software.
 #
 
-set -e # Exit immidiately on non-zero result
+set -ex # Exit immidiately on non-zero result
 
 REPO=$1
 REF=$2
@@ -101,7 +101,6 @@ cd /home/pi/catkin_ws/src/clover
 NPM_CONFIG_UNSAFE_PERM=true npm install gitbook-cli -g
 NPM_CONFIG_UNSAFE_PERM=true gitbook install
 gitbook build
-rm -rf _book/assets/ && ln -s ../docs/assets/ _book/assets # replace assets with a symlink to reduce image size
 touch node_modules/CATKIN_IGNORE docs/CATKIN_IGNORE _book/CATKIN_IGNORE clover/www/CATKIN_IGNORE apps/CATKIN_IGNORE # ignore documentation files by catkin
 
 echo_stamp "Installing additional ROS packages"

builder/image-software.sh

@@ -82,7 +82,9 @@ apt-get update
 
 # Let's retry fetching those packages several times, just in case
 echo_stamp "Software installing"
-my_travis_retry apt-get install --no-install-recommends -y cmake-data=3.13.4-1 cmake=3.13.4-1 # FIXME: using older CMake due to https://travis-ci.org/github/CopterExpress/clover/jobs/764367665#L6984
+apt-cache policy cmake
+apt-cache policy cmake-data
+my_travis_retry apt-get install --no-install-recommends -y cmake-data=3.13.4-1 cmake=3.13.4-1
 my_travis_retry apt-get install --no-install-recommends -y \
 unzip \
 zip \
@@ -127,7 +129,7 @@ curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip2.py
 python3 get-pip.py
 python get-pip2.py
 rm get-pip.py get-pip2.py
-#my_travis_retry pip install --upgrade pip
+my_travis_retry pip install --upgrade pip
 #my_travis_retry pip3 install --upgrade pip
 
 echo_stamp "Make sure both pip and pip3 are installed"