Fix 2 common Travis failures which happen when Travis has network issues (#3003)

* Retry downloading of depends sources 3 times

* Manually invoke apt-get update and install instead of using addon

This allows us to use travis_retry on these operations.

* Add exception for depends/Makefile in .gitignore

* Remove --retry from curl call

This avoids future confusion as we don't rely on curl anymore to properly
retry downloads. curls does only retry on transient errors, while Travis
might cause all kinds of errors which circumvent the retry logic of curl.

.gitignore

@@ -83,6 +83,7 @@ libconftest.dylib*
 Makefile
 dash-qt
 Dash-Qt.app
+!/depends/Makefile
 
 # Unit-tests
 Makefile.test

.travis.yml

@@ -8,19 +8,10 @@ dist: trusty
 os: linux
 language: generic
 
-addons:
-  apt:
-    packages:
-      # Use more recent docker version
-      - docker-ce
-      # Can be removed if Travis ever upgrades to Bionic
-      - realpath
-
 services:
   - docker
 
 cache:
-  apt: true
   ccache: true
   directories:
     - $HOME/cache
@@ -122,6 +113,10 @@ before_cache:
   # Save builder image
   - docker save dash-builder-$BUILD_TARGET-$TRAVIS_JOB_NUMBER $(docker history -q dash-builder-$BUILD_TARGET-$TRAVIS_JOB_NUMBER | grep -v \<missing\>) | gzip -2 > $HOME/cache/docker/dash-builder-$BUILD_TARGET.tar.gz
 
+before_install:
+  - travis_retry travis_apt_get_update
+  - travis_retry sudo apt-get -yq --no-install-suggests --no-install-recommends install docker-ce realpath
+
 install:
     # Our scripts try to be Travis agnostic
     - export PULL_REQUEST="$TRAVIS_PULL_REQUEST"

depends/Makefile

@@ -14,7 +14,6 @@ PATCHES_PATH = $(BASEDIR)/patches
 BASEDIR = $(CURDIR)
 HASH_LENGTH:=11
 DOWNLOAD_CONNECT_TIMEOUT:=10
-DOWNLOAD_RETRIES:=3
 HOST_ID_SALT ?= salt
 BUILD_ID_SALT ?= salt
 

depends/builders/darwin.mk

@@ -7,7 +7,7 @@ build_darwin_OTOOL: = $(shell xcrun -f otool)
 build_darwin_NM: = $(shell xcrun -f nm)
 build_darwin_INSTALL_NAME_TOOL:=$(shell xcrun -f install_name_tool)
 build_darwin_SHA256SUM = shasum -a 256
-build_darwin_DOWNLOAD = curl --location --fail --connect-timeout $(DOWNLOAD_CONNECT_TIMEOUT) --retry $(DOWNLOAD_RETRIES) -o
+build_darwin_DOWNLOAD = curl --location --fail --connect-timeout $(DOWNLOAD_CONNECT_TIMEOUT) -o
 
 #darwin host on darwin builder. overrides darwin host preferences.
 darwin_CC=$(shell xcrun -f clang) -mmacosx-version-min=$(OSX_MIN_VERSION)

depends/builders/linux.mk

@@ -1,2 +1,2 @@
 build_linux_SHA256SUM = sha256sum
-build_linux_DOWNLOAD = curl --location --fail --connect-timeout $(DOWNLOAD_CONNECT_TIMEOUT) --retry $(DOWNLOAD_RETRIES) -o
+build_linux_DOWNLOAD = curl --location --fail --connect-timeout $(DOWNLOAD_CONNECT_TIMEOUT) -o

depends/funcs.mk

@@ -31,6 +31,8 @@ endef
 define fetch_file
     ( test -f $$($(1)_source_dir)/$(4) || \
     ( $(call fetch_file_inner,$(1),$(2),$(3),$(4),$(5)) || \
+      (sleep 5 && $(call fetch_file_inner,$(1),$(2),$(3),$(4),$(5))) || \
+      (sleep 10 && $(call fetch_file_inner,$(1),$(2),$(3),$(4),$(5))) || \
       $(call fetch_file_inner,$(1),$(FALLBACK_DOWNLOAD_PATH),$(3),$(4),$(5))))
 endef