ci: cleans up docs and docker scripts (#37)

This removes references to travis and fixes copyright stanzas so they
can be copy/pastad to other repos. This also future proofs java for a
decade by allowing versions up to 39. Finally, this updates notes to the
current version of qemu-user-static, noting the runner must be x86_64.

Signed-off-by: Adrian Cole <adrian@tetrate.io>

.github/workflows/deploy.yml

@@ -7,7 +7,7 @@ name: deploy
 # See https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-syntax-for-github-actions#filter-pattern-cheat-sheet
 on:
   push:
-    tags: '[0-9]+.[0-9]+.[0-9]+**'  # Ex. 8.272.10 or 15.0.1_p9
+    tags: '[0-9]+.[0-9]+.[0-9]+**'  # e.g. 8.272.10 or 15.0.1_p9
 
 jobs:
   deploy:

build-bin/README.md

@@ -11,7 +11,7 @@ allows easier manual builds of the Dockerfile.
 `build-bin` holds portable scripts used in CI to test and deploy the project.
 
 The scripts here are portable. They do not include any CI provider-specific logic or ENV variables.
-This helps `.travis.yml` and `test.yml` (GitHub Actions) contain nearly the same contents, even if
+This helps `test.yml` (GitHub Actions) and alternatives contain nearly the same contents, even if
 certain OpenZipkin projects need slight adjustments here. Portability has proven necessary, as
 OpenZipkin has had to transition CI providers many times due to feature and quota constraints.
 
@@ -64,7 +64,7 @@ jobs:
   test:
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0  # full git history for license check
       - name: Test
@@ -73,49 +73,6 @@ jobs:
           build-bin/test
 ```
 
-### Example Travis setup
-`.travis.yml` is a monolithic configuration file broken into stages, of which the default is "test".
-A simplest Travis `test` job configures tests in `install` and runs them as `script`, but only on
-relevant event conditions.
-
-The `if:` section obviates job creation and resource usage for irrelevant events. Travis does not
-support file conditions. A `before_install` step to skip documentation-only commits will likely
-complete in less than a minute (10 credit cost).
-
-Here's a partial `.travis.yml` including only the aspects mentioned above.
-```yaml
-git:
-  depth: false  # TRAVIS_COMMIT_RANGE requires full commit history.
-
-jobs:
-  include:
-    - stage: test
-      if: branch = master AND tag IS blank AND type IN (push, pull_request)
-      name: Run unit and integration tests
-      before_install: |  # Prevent test build of a documentation-only change.
-        if [ -n "${TRAVIS_COMMIT_RANGE}" ] && ! git diff --name-only "${TRAVIS_COMMIT_RANGE}" -- | grep -qv '\.md$'; then
-          echo "Stopping job as changes only affect documentation (ex. README.md)"
-          travis_terminate 0
-        fi
-      install: ./build-bin/configure_test
-      script: ./build-bin/test
-```
-
-When Travis only runs tests (something else does deploy), there's no need to use stages:
-```yaml
-git:
-  depth: false  # TRAVIS_COMMIT_RANGE requires full commit history.
-
-if: branch = master AND tag IS blank AND type IN (push, pull_request)
-before_install: |  # Prevent test build of a documentation-only change.
-  if [ -n "${TRAVIS_COMMIT_RANGE}" ] && ! git diff --name-only "${TRAVIS_COMMIT_RANGE}" -- | grep -qv '\.md$'; then
-    echo "Stopping job as changes only affect documentation (ex. README.md)"
-    travis_terminate 0
-  fi
-install: ./build-bin/configure_test
-script: ./build-bin/test
-```
-
 ## Deploy
 
 Deploy builds and pushes artifacts to a remote repository for master and release commits on it. CI
@@ -138,17 +95,18 @@ master will happen even on README change.
 
 Here's a partial `deploy.yml` including only the aspects mentioned above. Notice env variables are
 explicitly defined and `on.tags` is a [glob pattern](https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-syntax-for-github-actions#filter-pattern-cheat-sheet).
+
 ```yaml
 on:
   push:
-    tags: '[0-9]+.[0-9]+.[0-9]+**'  # Ex. 8.272.10 or 15.0.1_p9
+    tags: '[0-9]+.[0-9]+.[0-9]+**'  # e.g. 8.272.10 or 15.0.1_p9
     branches: master
 
 jobs:
   deploy:
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 1  # only needed to get the sha label
       - name: Configure Deploy
@@ -160,51 +118,3 @@ jobs:
         # GITHUB_REF will be refs/heads/master or refs/tags/1.2.3
         run: build-bin/deploy $(echo ${GITHUB_REF} | cut -d/ -f 3)
 ```
-'[0-9]+.[0-9]+.[0-9]+**'
-### Example Travis setup
-`.travis.yml` is a monolithic configuration file broken into stages. This means `test` and `deploy`
-are in the same file. A simplest Travis `deploy` stage has two jobs: one for master pushes and
-another for version tags. These jobs are controlled by event conditions.
-
-The `if:` section obviates job creation and resource usage for irrelevant events. Travis does not
-support file conditions. A `before_install` step to skip documentation-only commits will likely
-complete in less than a minute (10 credit cost).
-
-As billing is by the minute, it is most cost effective to combine test and deploy on master push.
-
-Here's a partial `.travis.yml` including only the aspects mentioned above. Notice YAML anchors work
-in Travis and `tag =~` [condition](https://github.com/travis-ci/travis-conditions) is a regular
-expression.
-```yaml
-git:
-  depth: false  # full git history for license check, and doc-only skipping 
-
-_terminate_if_only_docs: &terminate_if_only_docs |
-  if [ -n "${TRAVIS_COMMIT_RANGE}" ] && ! git diff --name-only "${TRAVIS_COMMIT_RANGE}" -- | grep -qv '\.md$'; then
-    echo "Stopping job as changes only affect documentation (ex. README.md)"
-    travis_terminate 0
-  fi
-
-jobs:
-  include:
-    - stage: test
-      if: branch = master AND tag IS blank AND type IN (push, pull_request)
-      before_install: *terminate_if_only_docs
-      install: |
-        if [ "${TRAVIS_SECURE_ENV_VARS}" = "true" ] && [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then
-          export SHOULD_DEPLOY=true
-          ./build-bin/configure_deploy
-        else
-          export SHOULD_DEPLOY=false
-          ./build-bin/configure_test
-        fi
-      script:
-        - ./build-bin/test || travis_terminate 1
-        - if [ "${SHOULD_DEPLOY}" != "true" ]; then travis_terminate 0; fi
-        - travis_wait ./build-bin/deploy master
-    - stage: deploy
-      # Ex. 8.272.10 or 15.0.1_p9
-      if: tag =~ /^[0-9]+\.[0-9]+\.[0-9]+/ AND type = push AND env(GH_TOKEN) IS present
-      install: ./build-bin/configure_deploy
-      script: ./build-bin/deploy ${TRAVIS_TAG}
-```

build-bin/docker/configure_docker

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Copyright 2020 The OpenZipkin Authors
+# Copyright 2019-2023 The OpenZipkin Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 # in compliance with the License. You may obtain a copy of the License at

build-bin/docker/configure_docker_push

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Copyright 2020 The OpenZipkin Authors
+# Copyright 2019-2023 The OpenZipkin Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 # in compliance with the License. You may obtain a copy of the License at
@@ -50,5 +50,8 @@ fi
 # See https://github.com/multiarch/qemu-user-static
 #
 # Mirrored image use to avoid docker.io pulls:
-# docker tag multiarch/qemu-user-static:5.1.0-7 ghcr.io/openzipkin/multiarch-qemu-user-static:latest
+# docker tag multiarch/qemu-user-static:7.2.0-1 ghcr.io/openzipkin/multiarch-qemu-user-static:latest
+#
+# Note: This image only works on x86_64/amd64 architecture.
+# See: https://github.com/multiarch/qemu-user-static#supported-host-architectures
 docker run --rm --privileged ghcr.io/openzipkin/multiarch-qemu-user-static --reset -p yes

build-bin/docker/docker_arch

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Copyright 2023 The OpenZipkin Authors
+# Copyright 2019-2023 The OpenZipkin Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 # in compliance with the License. You may obtain a copy of the License at

build-bin/docker/docker_args

@@ -46,21 +46,21 @@ if [ -n "${DOCKER_TARGET}" ]; then
 fi
 
 # When non-empty, becomes the base layer including tag appropriate for the image being built.
-# Ex. ghcr.io/openzipkin/java:15.0.1_p9-jre
+# e.g. ghcr.io/openzipkin/java:21.0.1_p12-jre
 #
 # This is not required to be a base (FROM scratch) image like ghcr.io/openzipkin/alpine:3.12.3
 # See https://docs.docker.com/glossary/#parent-image
 if [ -n "${DOCKER_PARENT_IMAGE}" ]; then
   docker_args="${docker_args} --build-arg docker_parent_image=${DOCKER_PARENT_IMAGE}"
 fi
 
-# When non-empty, becomes the build-arg alpine_version. Ex. "3.12.3"
+# When non-empty, becomes the build-arg alpine_version. e.g. "3.12.3"
 # Used to align base layers from https://github.com/orgs/openzipkin/packages/container/package/alpine
 if [ -n "${ALPINE_VERSION}" ]; then
   docker_args="${docker_args} --build-arg alpine_version=${ALPINE_VERSION}"
 fi
 
-# When non-empty, becomes the build-arg java_version. Ex. "15.0.1_p9"
+# When non-empty, becomes the build-arg java_version. e.g. "21.0.1_p12"
 # Used to align base layers from https://github.com/orgs/openzipkin/packages/container/package/java
 if [ -n "${JAVA_VERSION}" ]; then
   docker_args="${docker_args} --build-arg java_version=${JAVA_VERSION}"
@@ -69,13 +69,13 @@ if [ -n "${JAVA_VERSION}" ]; then
   java_major_version=$(echo ${JAVA_VERSION}| cut -f1 -d .)
   case ${java_major_version} in
     8) java_home=/usr/lib/jvm/java-1.8-openjdk;;
-    1?) java_home=/usr/lib/jvm/java-${java_major_version}-openjdk;;
+    1?|2?|3?) java_home=/usr/lib/jvm/java-${java_major_version}-openjdk;;
   esac
 
   if [ -n "${java_home}" ]; then docker_args="${docker_args} --build-arg java_home=${java_home}"; fi
 fi
 
-# When non-empty, becomes the build-arg maven_classifier. Ex. "module" or "exec"
+# When non-empty, becomes the build-arg maven_classifier. e.g. "module" or "exec"
 # Used as the classifier arg to ./build-bin/maven/maven_unjar. Allows building two images with the
 # same Dockerfile, varying on classifier, like openzipkin/zipkin vs openzipkin/zipkin-slim
 if [ -n "${MAVEN_CLASSIFIER}" ]; then

build-bin/docker/docker_build

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Copyright 2020 The OpenZipkin Authors
+# Copyright 2019-2023 The OpenZipkin Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 # in compliance with the License. You may obtain a copy of the License at

build-bin/docker/docker_push

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Copyright 2023 The OpenZipkin Authors
+# Copyright 2019-2023 The OpenZipkin Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 # in compliance with the License. You may obtain a copy of the License at