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Generate API reference docs for Pipeline
This is the first part of addressing tektoncd#1250 (and tektoncd/website#117). Using https://github.com/ahmetb/gen-crd-api-reference-docs/, the tool Knative uses for this, plus my PR at ahmetb/gen-crd-api-reference-docs#43 for an issue with `pkg/apis/pipeline/pod`, this adds generation of `docs/pipeline-api.md` to `hack/update-codegen.sh`. Signed-off-by: Andrew Bayer <andrew.bayer@gmail.com>
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‎docs/pipeline-api.md‎

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‎hack/reference-docs-gen-config.json‎

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{
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"hideMemberFields": [
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"TypeMeta"
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],
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"hideTypePatterns": [
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"ParseError$",
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"List$"
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],
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"externalPackages": [
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{
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"typeMatchPrefix": "^k8s\\.io/apimachinery/pkg/apis/meta/v1\\.Duration$",
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"docsURLTemplate": "https://godoc.org/k8s.io/apimachinery/pkg/apis/meta/v1#Duration"
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},
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{
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"typeMatchPrefix": "^k8s\\.io/(api|apimachinery/pkg/apis)/",
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"docsURLTemplate": "https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.21/#{{lower .TypeIdentifier}}-{{arrIndex .PackageSegments -1}}-{{arrIndex .PackageSegments -2}}"
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},
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{
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"typeMatchPrefix": "^knative\\.dev/pkg/apis/duck",
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"docsURLTemplate": "https://pkg.go.dev/knative.dev/pkg/apis/duck/{{arrIndex .PackageSegments -1}}#{{.TypeIdentifier}}"
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},
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{
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"typeMatchPrefix": "^knative\\.dev/pkg/apis\\.URL$",
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"docsURLTemplate": "https://pkg.go.dev/knative.dev/pkg/apis#URL"
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},
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{
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"typeMatchPrefix": "^knative\\.dev/networking/pkg/apis/networking",
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"docsURLTemplate": "https://pkg.go.dev/knative.dev/networking/pkg/apis/networking#{{.TypeIdentifier}}"
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},
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{
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"typeMatchPrefix": "^time\\.Duration$",
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"docsURLTemplate": "https://golang.org/pkg/time/#Duration"
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}
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],
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"typeDisplayNamePrefixOverrides": {
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"k8s.io/api/": "Kubernetes ",
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"k8s.io/apimachinery/pkg/apis/": "Kubernetes "
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},
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"markdownDisabled": false,
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"gitCommitDisabled": true
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}
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‎hack/reference-docs-template/members.tpl‎

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{{ define "members" }}
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{{ range .Members }}
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{{ if not (hiddenMember .)}}
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<tr>
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<td>
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<code>{{ fieldName . }}</code><br/>
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<em>
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{{ if linkForType .Type }}
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<a href="{{ linkForType .Type}}">
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{{ typeDisplayName .Type }}
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</a>
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{{ else }}
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{{ typeDisplayName .Type }}
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{{ end }}
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</em>
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</td>
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<td>
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{{ if fieldEmbedded . }}
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<p>
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(Members of <code>{{ fieldName . }}</code> are embedded into this type.)
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</p>
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{{ end}}
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{{ if isOptionalMember .}}
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<em>(Optional)</em>
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{{ end }}
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{{ safe (renderComments .CommentLines) }}
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{{ if and (eq (.Type.Name.Name) "ObjectMeta") }}
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Refer to the Kubernetes API documentation for the fields of the
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<code>metadata</code> field.
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{{ end }}
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{{ if or (eq (fieldName .) "spec") }}
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<br/>
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<br/>
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<table>
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{{ template "members" .Type }}
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</table>
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{{ end }}
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</td>
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</tr>
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{{ end }}
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{{ end }}
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{{ end }}

‎hack/reference-docs-template/pkg.tpl‎

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{{ define "packages" }}
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{{ with .packages}}
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<p>Packages:</p>
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<ul>
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{{ range . }}
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<li>
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<a href="#{{- packageAnchorID . -}}">{{ packageDisplayName . }}</a>
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</li>
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{{ end }}
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</ul>
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{{ end}}
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{{ range .packages }}
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<h2 id="{{- packageAnchorID . -}}">
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{{- packageDisplayName . -}}
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</h2>
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{{ with (index .GoPackages 0 )}}
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{{ with .DocComments }}
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<div>
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{{ safe (renderComments .) }}
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</div>
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{{ end }}
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{{ end }}
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Resource Types:
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<ul>
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{{- range (visibleTypes (sortedTypes .Types)) -}}
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{{ if isExportedType . -}}
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<li>
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<a href="{{ linkForType . }}">{{ typeDisplayName . }}</a>
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</li>
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{{- end }}
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{{- end -}}
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</ul>
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{{ range (visibleTypes (sortedTypes .Types))}}
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{{ template "type" . }}
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{{ end }}
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<hr/>
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{{ end }}
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<p><em>
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Generated with <code>gen-crd-api-reference-docs</code>
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{{ with .gitCommit }} on git commit <code>{{ . }}</code>{{end}}.
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</em></p>
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{{ end }}

‎hack/reference-docs-template/placeholder.go‎

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// Placeholder file to make Go vendor this directory properly.
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package template

‎hack/reference-docs-template/type.tpl‎

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{{ define "type" }}
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<h3 id="{{ anchorIDForType . }}">
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{{- .Name.Name }}
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{{ if eq .Kind "Alias" }}(<code>{{.Underlying}}</code> alias){{ end -}}
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</h3>
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{{ with (typeReferences .) }}
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<p>
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(<em>Appears on:</em>
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{{- $prev := "" -}}
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{{- range . -}}
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{{- if $prev -}}, {{ end -}}
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{{- $prev = . -}}
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<a href="{{ linkForType . }}">{{ typeDisplayName . }}</a>
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{{- end -}}
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)
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</p>
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{{ end }}
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<div>
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{{ safe (renderComments .CommentLines) }}
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</div>
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{{ with (constantsOfType .) }}
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<table>
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<thead>
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<tr>
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<th>Value</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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{{- range . -}}
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<tr>
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{{- /*
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renderComments implicitly creates a <p> element, so we
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add one to the display name as well to make the contents
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of the two cells align evenly.
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*/ -}}
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<td><p>{{ typeDisplayName . }}</p></td>
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<td>{{ safe (renderComments .CommentLines) }}</td>
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</tr>
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{{- end -}}
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</tbody>
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</table>
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{{ end }}
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{{ if .Members }}
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<table>
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<thead>
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<tr>
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<th>Field</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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{{ if isExportedType . }}
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<tr>
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<td>
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<code>apiVersion</code><br/>
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string</td>
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<td>
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<code>
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{{apiGroup .}}
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</code>
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</td>
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</tr>
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<tr>
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<td>
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<code>kind</code><br/>
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string
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</td>
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<td><code>{{.Name.Name}}</code></td>
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</tr>
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{{ end }}
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{{ template "members" .}}
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</tbody>
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</table>
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{{ end }}
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{{ end }}

‎hack/update-codegen.sh‎

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# Make sure the OpenAPI specification and Swagger file are up-to-date
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${REPO_ROOT_DIR}/hack/update-openapigen.sh
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# Make sure the generated API reference docs are up-to-date
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${REPO_ROOT_DIR}/hack/update-reference-docs.sh

‎hack/update-reference-docs.sh‎

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#!/usr/bin/env bash
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# Copyright 2020 The Tekton Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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set -o errexit
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set -o nounset
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PREFIX=${GOBIN:-${GOPATH}/bin}
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(
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# To support running this script from anywhere, we have to first cd into this directory
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# so we can install the tools.
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cd $(dirname "${0}")
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# TODO(abayer): Switch to github.com/ahmetb/gen-crd-api-reference-docs when https://github.com/ahmetb/gen-crd-api-reference-docs/pull/43 is merged
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go install github.com/abayer/gen-crd-api-reference-docs
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)
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echo "Generating API reference docs ..."
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${PREFIX}/gen-crd-api-reference-docs \
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-config "./hack/reference-docs-gen-config.json" \
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-api-dir "github.com/tektoncd/pipeline/pkg/apis" \
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-template-dir "./hack/reference-docs-template" \
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-out-file "./docs/pipeline-api.md"

‎pkg/apis/doc.go‎

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/*
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Copyright 2019 The Tekton Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package apis contains API Schema definitions for the various API groups
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package apis

‎pkg/apis/pipeline/pod/doc.go‎

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limitations under the License.
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*/
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// +k8s:openapi-gen=true
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// Package pod contains non-versioned pod configuration
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// +k8s:openapi-gen=true
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// +gencrdrefdocs:unversionedTypes
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// +groupName=tekton.dev
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package pod

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