Add the ability to specify secret name and key

Rather than forcing task users to create a secret with a fixed
name, allow setting the secret name and key as parameter.

The new parameters are optional, in the sense that they default
to the previous hardcoded values.

task/github-set-status/0.2/README.md

@@ -0,0 +1,79 @@
+# GitHub Set Status
+
+GitHub Set Status is part of a collection of GitHub tasks to help working
+with the [GitHub API](https://docs.github.com/en/rest/reference).
+
+## GitHub token
+
+This task expects a secret set in the kubernetes secret `github`
+with a GitHub token in the key `token`; you can easily create it on the
+command line with `kubectl` like this :
+
+```
+kubectl create secret generic github --from-literal token="MY_TOKEN"
+```
+
+## Set Status on a Commit/PR
+
+The `github-set-status` task uses the [status api](https://docs.github.com/en/rest/reference/repos#statuses)
+to mark GitHub commits with an `error`, `failure`, `pending`, or `success`
+state, which is then reflected in pull requests involving those commits.
+
+Statuses include as well a `description` and a `target_url`, to give the user
+informations about the CI statuses or a direct link to the full log.
+
+### Install the Task
+
+```
+kubectl apply -f https://raw.githubusercontent.com/tektoncd/catalog/master/task/github-set-status/0.2/github-set-status.yaml
+```
+
+### Parameters
+
+* **REPO_FULL_NAME**: The GitHub repository full name, _e.g:_ `tektoncd/catalog`
+* **GITHUB_HOST_URL**: The GitHub host domain _default:_ `api.github.com`
+* **API_PATH_PREFIX**: The GitHub Enterprise has a prefix for the API path. _e.g:_ `/api/v3`
+* **SHA**: The commit SHA to set the status for _e.g_: `tektoncd/catalog`
+* **TARGET_URL**: The target URL to associate with this status. This URL will
+  be linked from the GitHub UI to allow users to easily see the source of the
+  status. For example you can link to a
+  [dashboard](https://github.com/tektoncd/dashboard) URL so users can follow a
+  Pipeline/Task run.
+* **DESCRIPTION**: A short description of the status. _e.g:_ `Building your PR`
+* **CONTEXT**: The GitHub context, A string label to differentiate this status
+  from the status of other systems. _e.g:_ `continuous-integration/tekton`
+* **STATE**: The state of the status. Can be one of the following `error`,
+  `failure`, `pending`, or `success`.
+* **GITHUB_TOKEN_SECRET_NAME** \[optional\]: The name of the kubernetes secret that
+  contains the GitHub token. Default value: `github`
+* **GITHUB_TOKEN_SECRET_KEY** \[optional\]: The key within the kubernetes secret that
+  contains the GitHub token. Default value: `token`
+
+## Usage
+
+This TaskRun sets a commit on GitHub to `pending` getting tested by the CI.
+
+```yaml
+---
+apiVersion: tekton.dev/v1beta1
+kind: TaskRun
+metadata:
+  labels:
+    tekton.dev/task: github-set-status
+  name: github-set-status-run-on-commit-bd93
+spec:
+  taskRef:
+    kind: Task
+    name: github-set-status
+  params:
+    - name: REPO_FULL_NAME
+      value: tektoncd/catalog
+     - name: SHA
+      value: bd93869b489258cef567ccf85e7ef6bc0d6949ea
+    - name: DESCRIPTION
+      value: "Build has started"
+    - name: STATE
+      value: pending
+    - name: TARGET_URL
+      value: https://tekton/dashboard/taskrun/log
+```

task/github-set-status/0.2/github-set-status.yaml

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+---
+apiVersion: tekton.dev/v1beta1
+kind: Task
+metadata:
+  name: github-set-status
+  labels:
+    app.kubernetes.io/version: "0.2"
+  annotations:
+    tekton.dev/pipelines.minVersion: "0.12.1"
+    tekton.dev/tags: github
+    tekton.dev/displayName: "set github status"
+spec:
+  description: >-
+    This task will set the status of the CI job to the specified value along
+    witha link to the specified target URL where developers can follow the
+    progress of the CI job.
+
+    The `github-set-status` task allows external services to mark GitHub commits
+    with an `error`, `failure`, `pending`, or `success` state, which is then
+    reflected in pull requests involving those commits. Statuses include as well a
+    `description` and a `target_url`, to give the user informations about the CI
+    statuses or a direct link to the full log.
+
+  params:
+  - name: GITHUB_HOST_URL
+    description: |
+      The GitHub host, adjust this if you run a GitHub enteprise.
+    default: "api.github.com"
+    type: string
+
+  - name: API_PATH_PREFIX
+    description: |
+      The API path prefix, GitHub Enterprise has a prefix e.g. /api/v3
+    default: ""
+    type: string
+
+  - name: REPO_FULL_NAME
+    description: |
+      The GitHub repository full name, e.g.: tektoncd/catalog
+    type: string
+
+  - name: GITHUB_TOKEN_SECRET_NAME
+    description: |
+      The name of the kubernetes secret that contains the GitHub token, default: github
+    type: string
+    default: github
+
+  - name: GITHUB_TOKEN_SECRET_KEY
+    description: |
+      The key within the kubernetes secret that contains the GitHub token, default: token
+    type: string
+    default: token
+
+  - name: SHA
+    description: |
+      Commit SHA to set the status for.
+    type: string
+
+  - name: TARGET_URL
+    description: |
+      The target URL to associate with this status. This URL will be linked
+      from the GitHub UI to allow users to easily see the source of the
+      status.
+    type: string
+
+  - name: DESCRIPTION
+    description: |
+      A short description of the status.
+    type: string
+
+  - name: CONTEXT
+    description: |
+      The GitHub context, A string label to differentiate this status from
+      the status of other systems. ie: "continuous-integration/tekton"
+    default: "continuous-integration/tekton"
+    type: string
+
+  - name: STATE
+    description: |
+      The state of the status. Can be one of the following `error`,
+      `failure`, `pending`, or `success`.
+    type: string
+  steps:
+    - name: set-status
+      env:
+        - name: GITHUBTOKEN
+          valueFrom:
+            secretKeyRef:
+              name: $(params.GITHUB_TOKEN_SECRET_NAME)
+              key: $(params.GITHUB_TOKEN_SECRET_KEY)
+
+      image: registry.access.redhat.com/ubi8/python-38:1-34.1599745032
+      script: |
+        #!/usr/libexec/platform-python
+        import json
+        import os
+        import http.client
+
+        status_url = "$(params.API_PATH_PREFIX)" + "/repos/$(params.REPO_FULL_NAME)/" + \
+            "statuses/$(params.SHA)"
+
+        data = {
+            "state": "$(params.STATE)",
+            "target_url": "$(params.TARGET_URL)",
+            "description": "$(params.DESCRIPTION)",
+            "context": "$(params.CONTEXT)"
+        }
+        print("Sending this data to GitHub: ")
+        print(data)
+
+        conn = http.client.HTTPSConnection("$(params.GITHUB_HOST_URL)")
+        r = conn.request(
+            "POST",
+            status_url,
+            body=json.dumps(data),
+            headers={
+                "User-Agent": "TektonCD, the peaceful cat",
+                "Authorization": "Bearer " + os.environ["GITHUBTOKEN"],
+                "Accept": "application/vnd.github.v3+json ",
+            })
+        resp = conn.getresponse()
+        if not str(resp.status).startswith("2"):
+            print("Error: %d" % (resp.status))
+            print(resp.read())
+        else:
+          print("GitHub status '$(params.STATE)' has been set on "
+                "$(params.REPO_FULL_NAME)#$(params.SHA) ")