Remove travis-ci leftovers

Travis CI stopped providing CI minutes for open-source projects
some time ago and we have migrated to GitHub actions.

Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>

.travis.yml

@@ -1,35 +0,0 @@
-language: c
-os: linux
-dist: bionic
-services:
-  - docker
-jobs:
-  include:
-    - os: linux
-      arch: ppc64le
-      env: TR_ARCH=local
-      dist: bionic
-    - os: linux
-      arch: ppc64le
-      env: TR_ARCH=local CLANG=1
-      dist: bionic
-    - os: linux
-      arch: s390x
-      env: TR_ARCH=local
-      dist: bionic
-    - os: linux
-      arch: arm64-graviton2
-      env: TR_ARCH=local RUN_TESTS=1
-      dist: focal
-      group: edge
-      virt: vm
-    - os: linux
-      arch: arm64-graviton2
-      env: TR_ARCH=local CLANG=1 RUN_TESTS=1
-      group: edge
-      virt: vm
-      dist: bionic
-script:
-  - sudo make -C scripts/ci $TR_ARCH
-after_success:
-  - make -C scripts/ci after_success

CONTRIBUTING.md

@@ -158,11 +158,6 @@ make test
 
 The command runs [ZDTM Test Suite](https://criu.org/ZDTM_Test_Suite). Check for any error messages produced by it.
 
-In case you'd rather have someone else run the tests, you can use travis-ci for your
-own GitHub fork of CRIU. It will check the compilation for various supported platforms,
-as well as run most of the tests from the suite. See https://travis-ci.org/checkpoint-restore/criu
-for more details.
-
 ## Describe your changes
 
 Describe your problem.  Whether your change is a one-line bug fix or
@@ -420,5 +415,3 @@ sometimes a patch may fly around a week before it gets reviewed.
 Wiki article: [Continuous integration](https://criu.org/Continuous_integration)
 
 CRIU tests are run for each series sent to the mailing list. If you get a message from our patchwork that patches failed to pass the tests, you have to investigate what is wrong.
-
-We also recommend you to [enable Travis CI for your repo](https://criu.org/Continuous_integration#Enable_Travis_CI_for_your_repo) to check patches in your git branch, before sending them to the mailing list.

Makefile

@@ -43,7 +43,7 @@ ifeq ($(ARCH),arm)
         endif
 
         ifeq ($(ARMV),8)
-                # Running 'setarch linux32 uname -m' returns armv8l on travis aarch64.
+                # Running 'setarch linux32 uname -m' returns armv8l on aarch64.
                 # This tells CRIU to handle armv8l just as armv7hf. Right now this is
                 # only used for compile testing. No further verification of armv8l exists.
                 ARCHCFLAGS += -march=armv7-a

Makefile.compel

@@ -50,8 +50,8 @@ compel/plugins/%: $(compel-deps) .FORCE
 
 #
 # GNU make 4.x supports targets matching via wide
-# match targeting, where GNU make 3.x series (used on
+# match targeting, where GNU make 3.x series is not,
-# Travis) is not, so we have to write them here explicitly.
+# so we have to write them here explicitly.
 compel/plugins/std.lib.a: $(compel-deps) .FORCE
 	$(Q) $(MAKE) $(build)=compel/plugins $@
 

scripts/ci/Makefile

@@ -30,9 +30,9 @@ endif
 
 export CONTAINER_TERMINAL
 
+# Here we assume that any CPU architecture besides x86_64 is running in containers
+# that may not support running docker with '--privileged'.
 ifeq ($(UNAME),x86_64)
-	# On anything besides x86_64 Travis is running unprivileged LXD
-	# containers which do not support running docker with '--privileged'.
 	CONTAINER_OPTS := --rm $(CONTAINER_TERMINAL) --privileged --userns=host --cgroupns=host -v /lib/modules:/lib/modules --tmpfs /run
 else
 	CONTAINER_OPTS := --rm -v /lib/modules:/lib/modules --tmpfs /run

scripts/ci/run-ci-tests.sh

@@ -11,13 +11,11 @@ IFS=" " read -r -a ZDTM_OPTS <<< "$ZDTM_OPTS"
 UNAME_M=$(uname -m)
 
 if [ "$UNAME_M" != "x86_64" ]; then
-	# For Travis only x86_64 seems to be baremetal. Other
+	# Some tests rely on kernel features that may not be availble
-	# architectures are running in unprivileged LXD containers.
+	# when running in a container. Here we assume that x86_64
-	# That seems to block most of CRIU's interfaces.
+	# systems are baremetal, and skip the tests for all other
-
+	# CPU architectures. We can override this using the RUN_TESTS
-	# But with the introduction of baremetal aarch64 systems in
+	# environment variable (e.g., for aarch64).
-	# Travis (arch: arm64-graviton2) we can override this using
-	# an environment variable
 	[ -n "$RUN_TESTS" ] || SKIP_CI_TEST=1
 fi
 
@@ -31,7 +29,7 @@ ci_prep () {
 	# not run anymore with 'sudo -u \#1000' if the UID does not exist.
 	adduser -u 1000 --disabled-password --gecos "criutest" criutest || :
 
-	# This can fail on aarch64 travis
+	# This can fail on aarch64
 	service apport stop || :
 
 	# Ubuntu has set up AppArmor in 24.04 so that it blocks use of user
@@ -258,7 +256,7 @@ if [ -z "$SKIP_EXT_DEV_TEST" ]; then
 fi
 
 make -C test/others/make/ run CC="$CC"
-if [ -n "$TRAVIS" ] || [ -n "$CIRCLECI" ]; then
+if [ -n "$CIRCLECI" ]; then
        # GitHub Actions (and Cirrus CI) does not provide a real TTY and CRIU will fail with:
        # Error (criu/tty.c:1014): tty: Don't have tty to inherit session from, aborting
        make -C test/others/shell-job/ run

scripts/ci/vagrant.sh

@@ -11,11 +11,6 @@ FEDORA_VERSION=42
 FEDORA_BOX_VERSION=1.1.0
 
 setup() {
-	if [ -n "$TRAVIS" ]; then
-		# Load the kvm modules for vagrant to use qemu
-		modprobe kvm kvm_intel
-	fi
-
 	# Tar up the git checkout to have vagrant rsync it to the VM
 	tar cf /tmp/criu.tar -C ../../../ criu
 	# Cirrus has problems with the following certificate.
@@ -29,7 +24,7 @@ setup() {
 	vagrant init cloud-image/fedora-${FEDORA_VERSION} --box-version ${FEDORA_BOX_VERSION}
 
 	# The default libvirt Vagrant VM uses 512MB.
-	# Travis VMs should have around 7.5GB.
+	# VMs in our CI typically have around 16GB.
 	# Increasing it to 4GB should work.
 	sed -i Vagrantfile -e 's,^end$,  config.vm.provider :libvirt do |libvirt|'"\n"'    libvirt.memory = 4096;end'"\n"'end,g'
 	# Sync /tmp/criu.tar into the VM

test/inhfd/memfd.py.checkskip

@@ -3,5 +3,5 @@
 import ctypes
 libc = ctypes.CDLL(None)
 
-# libc may not have memfd_create (e.g., centos on travis)
+# libc may not have memfd_create (e.g., centos)
 libc.memfd_create("test".encode('utf8'), 0)

test/zdtm/Makefile.inc

@@ -27,7 +27,7 @@ ifeq ($(ARCH),arm)
         else ifeq ($(ARMV),7)
                 ARCHCFLAGS += -march=armv7-a+fp
         else ifeq ($(ARMV),8)
-                # To build aarch32 on armv8 Travis-CI (see criu Makefile)
+                # To build aarch32 on armv8 (see criu Makefile)
                 ARCHCFLAGS += -march=armv7-a
                 ARMV := 7
         endif