Update README.md

README.md

@@ -2,3 +2,170 @@
 testing cloud.drone.io
 
 ## Usage
+
+### Run shell commands in a step
+
+```
+kind: pipeline
+name: default
+
+steps:
+  - name: test
+    image: alpine
+    environment:
+      MYUSERNAME:
+        from_secret: myusername
+    commands:
+      - echo "echo secret"
+      - echo $${MYUSERNAME}
+      - echo "run env command"
+      - env
+```
+
+or:
+
+```
+pipeline:
+  docker:
+    image: alpine
+    secrets: [ myusername ]
+    commands:
+      - echo "echo secret"
+      - echo $${MYUSERNAME}
+      - echo "run env command"
+      - env
+```
+
+This will output:
+
+```
++ echo "echo secret"
+echo secret
++ echo ${MYUSERNAME}
+********
++ echo "run env command"
+run env command
++ env
+DRONE_SYSTEM_HOST=cloud.drone.io
+DRONE_COMMIT_AUTHOR_AVATAR=https://avatars0.githubusercontent.com/u/567298?v=4
+DRONE_BRANCH=master
+DRONE_GIT_SSH_URL=git@github.com:ruanbekker/drone-ci-testing.git
+DRONE_JOB_FINISHED=1555573281
+CI=true
+HOSTNAME=7a20b000f25c
+CI_BUILD_STARTED=1555573280
+DRONE_REPO_LINK=https://github.com/ruanbekker/drone-ci-testing
+DRONE_TARGET_BRANCH=master
+DRONE_REPO_NAMESPACE=ruanbekker
+DRONE_STAGE_OS=linux
+DRONE_COMMIT_AUTHOR=ruanbekker
+CI_WORKSPACE=/drone/src
+DRONE_GIT_HTTP_URL=https://github.com/ruanbekker/drone-ci-testing.git
+DRONE_RUNNER_HOSTNAME=15e89c0f84f1
+SHLVL=1
+DRONE_COMMIT_BRANCH=master
+HOME=/root
+DRONE_REPO_SCM=
+DRONE_REPO_PRIVATE=false
+DRONE_SYSTEM_PROTO=https
+DRONE_STEP_NUMBER=2
+DRONE_REPO_VISIBILITY=public
+DRONE_BUILD_STATUS=success
+DRONE_BUILD_ACTION=
+DRONE_RUNNER_PLATFORM=linux/amd64
+DRONE_WORKSPACE_BASE=/drone/src
+DRONE_COMMIT_BEFORE=138bc48338f44be2ef4ad8a57d63d4bf2403da3c
+CI_JOB_STARTED=1555573280
+DRONE_STAGE_ARCH=amd64
+CI_WORKSPACE_PATH=
+DRONE_STAGE_STATUS=success
+DRONE_SOURCE_BRANCH=master
+DRONE_STAGE_NAME=default
+DRONE_REPO_BRANCH=master
+DRONE_COMMIT_MESSAGE=add envvar
+DRONE_DEPLOY_TO=
+CI_BUILD_FINISHED=1555573281
+DRONE_SYSTEM_HOSTNAME=cloud.drone.io
+DRONE_REMOTE_URL=https://github.com/ruanbekker/drone-ci-testing.git
+DRONE_JOB_STATUS=success
+MYUSERNAME=********
+DRONE_REPO_OWNER=ruanbekker
+DRONE_STAGE_KIND=pipeline
+PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+DRONE=true
+DRONE_BUILD_NUMBER=15
+DRONE_BUILD_STARTED=1555573280
+DRONE_BUILD_LINK=https://cloud.drone.io/ruanbekker/drone-ci-testing/15
+CI_JOB_FINISHED=1555573281
+DRONE_WORKSPACE=/drone/src
+DRONE_STAGE_VARIANT=
+DRONE_STAGE_DEPENDS_ON=
+DRONE_COMMIT_AFTER=05818a52403e07b2cab4d980522e7264be4aa18c
+DRONE_STAGE_NUMBER=1
+DRONE_STAGE_STARTED=1555573280
+DRONE_COMMIT=05818a52403e07b2cab4d980522e7264be4aa18c
+DRONE_RUNNER_HOST=15e89c0f84f1
+DRONE_JOB_STARTED=1555573280
+DRONE_WORKSPACE_PATH=
+DRONE_BUILD_EVENT=push
+DRONE_COMMIT_SHA=05818a52403e07b2cab4d980522e7264be4aa18c
+DRONE_BUILD_CREATED=1555573279
+DRONE_COMMIT_AUTHOR_EMAIL=ruan.ru.bekker@gmail.com
+DRONE_REPO_NAME=drone-ci-testing
+DRONE_STAGE_MACHINE=15e89c0f84f1
+DRONE_COMMIT_REF=refs/heads/master
+CI_BUILD_STATUS=success
+DRONE_MACHINE=15e89c0f84f1
+CI_WORKSPACE_BASE=/drone/src
+PWD=/drone/src
+DRONE_BUILD_FINISHED=1555573281
+DRONE_COMMIT_LINK=https://github.com/ruanbekker/drone-ci-testing/compare/138bc48338f4...05818a52403e
+DRONE_REPO=ruanbekker/drone-ci-testing
+DRONE_STEP_NAME=test
+DRONE_SYSTEM_VERSION=1.0.0
+DRONE_COMMIT_AUTHOR_NAME=Ruan Bekker
+CI_JOB_STATUS=success
+DRONE_STAGE_FINISHED=1555573281
+```
+
+### Publish to Dockerhub
+
+- Clone
+- Build Docker Image
+- Publish to Dockerhub with `latest` and `git_commit_id` and use credentials from stored secrets
+
+The `.drone.yml`
+
+```
+kind: pipeline
+name: default
+
+steps:
+  - name: test
+    image: alpine
+    environment:
+      MYUSERNAME:
+        from_secret: myusername
+    commands:
+      - echo "echo secret"
+      - echo $${MYUSERNAME}
+      - echo "run env command"
+      - env
+      - echo $${MYUSERNAME} > /tmp/file
+      - mkdir -p /tmp/foo/dir
+      - touch /tmp/foo/dir/test.txt
+      
+  - name: publish
+    image: plugins/docker
+    settings:
+      repo: ruanbekker/dronetest
+      auto_tag: false
+      auto_tag_suffix: alpine
+      tags:
+        - ${DRONE_COMMIT}
+        - latest
+      username: 
+        from_secret: dockerhub_username
+      password:
+        from_secret: dockerhub_password
+```