[tailscale] add .github

Updates #47

.github/ISSUE_TEMPLATE/03-gopls.yml

@@ -6,7 +6,7 @@ body:
   - type: markdown
     attributes:
       value: "Please answer these questions before submitting your issue. Thanks!"
-  - type: textarea
+  - type: input
     id: gopls-version
     attributes:
       label: "gopls version"

.github/ISSUE_TEMPLATE/12-telemetry.yml

@@ -1,30 +1,68 @@
 name: Go Telemetry Proposals
-description: Changes to the telemetry upload configuration
+description: New telemetry counter or update on an existing one
 title: "x/telemetry/config: proposal title"
 labels: ["Telemetry-Proposal"]
 projects: ["golang/29"]
 body:
 - type: textarea
   attributes:
-    label: Summary
-    description: >
-      What change are you proposing to the upload configuration, and why?
-      For new upload configuration, which new counters will be collected, what
-      do they measure, and why is it important to collect them?
-      Note that uploaded data must not carry sensitive user information.
-      See [go.dev/doc/telemetry#proposals](https://go.dev/doc/telemetry#proposals)
-      for more details on telemetry proposals.
+    label: Counter names
+    description: Names of counters to add or update.
   validations:
     required: true
-- type: input
+- type: textarea
+  attributes:
+    label: Description
+    description: What do these counters measure?
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Rationale
+    description: |
+      Why is the counter important?
+      For example, what new insights will it provide, and how will that information be used?
+      If this is about updating existing counters, why is the change necessary?
+  validations:
+    required: true
+- type: textarea
   attributes:
-    label: Proposed Config Change
-    description: >
-      A CL containing proposed changes to the
-      [config.txt](https://go.googlesource.com/telemetry/+/master/internal/chartconfig/config.txt)
-      chart configuration.
-      See the [chartconfig](https://pkg.go.dev/golang.org/x/telemetry/internal/chartconfig)
-      package for an explanation of the chart config format.
-      For an example change, see [CL 564619](https://go.dev/cl/564619).
+    label: Do the counters carry sensitive user information?
   validations:
     required: true
+- type: textarea
+  attributes:
+    label: How?
+    description: |
+      How do we plan to compute the info?
+      If available, include the code location or cl that uses the golang.org/x/telemetry/counter API.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Proposed Graph Config
+    description: |
+      Approved telemetry counters are maintained as [Go Telemetry Graph Config](https://golang.org/x/telemetry/internal/graphconfig) records.
+      Please draft the record entry for your proposal here.
+      If multiple records need to be included, separate them with `---` lines.
+      You can check the list of the approved counters and their current configuration in [config.txt](https://go.googlesource.com/telemetry/+/master/internal/configgen/config.txt).
+    render: Text
+    value: |
+      counter: gopls/bug
+      title: Gopls bug reports
+      description: Stacks of bugs encountered on the gopls server.
+      type: partition, histogram, stack # choose only one.
+      program: golang.org/x/tools/gopls
+      counter: gopls/bug
+      depth: 16  # only if type is stack.
+      version: v0.13.0  # the first binary version containing this counter.
+  validations:
+      required: true
+- type: dropdown
+  attributes:
+    label: New or Update
+    description: Is this a new counter? See [config.txt](https://go.googlesource.com/telemetry/+/master/internal/configgen/config.txt) for the list of approved counters.
+    options:
+      - New
+      - Update
+    default: 0

.github/workflows/build.yml

@@ -0,0 +1,122 @@
+name: Build toolchain
+
+permissions:
+  contents: write
+
+on:
+  push:
+    branches:
+      - tailscale
+      - 'tailscale.go1.23'
+  pull_request:
+    branches:
+      - '*'
+  workflow_dispatch:
+    inputs:
+      ref:
+        description: Branch, commit or tag to build from
+        required: true
+        default: 'tailscale.go1.23'
+
+jobs:
+  test:
+    runs-on: ubuntu-20.04
+    steps:
+    - name: checkout
+      uses: actions/checkout@v3
+      with:
+        ref: ${{ inputs.ref || github.ref }}
+    - name: test
+      run: cd src && ./all.bash
+
+  build_release:
+    strategy:
+      matrix:
+        GOOS: ["linux", "darwin"]
+        GOARCH: ["amd64", "arm64"]
+    runs-on: ubuntu-20.04
+    if: contains(fromJSON('["push", "workflow_dispatch"]'), github.event_name)
+    steps:
+    - name: checkout
+      uses: actions/checkout@v3
+      with:
+        ref: ${{ inputs.ref || github.ref }}
+    - name: build
+      run: cd src && ./make.bash
+      env:
+        GOOS: "${{ matrix.GOOS }}"
+        GOARCH: "${{ matrix.GOARCH }}"
+        CGO_ENABLED: "0"
+    - name: trim unnecessary bits
+      run: |
+        rm -rf pkg/*_*
+        mv pkg/tool/${{ matrix.GOOS }}_${{ matrix.GOARCH }} pkg
+        rm -rf pkg/tool/*_*
+        mv -f bin/${{ matrix.GOOS }}_${{ matrix.GOARCH }}/* bin/ || true
+        rm -rf bin/${{ matrix.GOOS }}_${{ matrix.GOARCH }}
+        mv pkg/${{ matrix.GOOS }}_${{ matrix.GOARCH }} pkg/tool
+        find . -type d -name 'testdata' -print0 | xargs -0 rm -rf
+        find . -name '*_test.go' -delete
+    - name: archive
+      run: cd .. && tar --exclude-vcs -zcf ${{ matrix.GOOS }}-${{ matrix.GOARCH }}.tar.gz go
+    - name: save
+      uses: actions/upload-artifact@v1
+      with:
+        name: ${{ matrix.GOOS }}-${{ matrix.GOARCH }}
+        path: ../${{ matrix.GOOS }}-${{ matrix.GOARCH }}.tar.gz
+
+  create_release:
+    runs-on: ubuntu-20.04
+    if: contains(fromJSON('["push", "workflow_dispatch"]'), github.event_name)
+    needs: [test, build_release]
+    outputs:
+      url: ${{ steps.create_release.outputs.upload_url }}
+    steps:
+    - name: create release
+      id: create_release
+      uses: actions/create-release@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        # Release name can't be the same as tag name, sigh
+        tag_name: build-${{ inputs.ref || github.sha }}
+        release_name: ${{ inputs.ref || github.sha }}
+        draft: false
+        prerelease: true
+
+  upload_release:
+    strategy:
+      matrix:
+        GOOS: ["linux", "darwin"]
+        GOARCH: ["amd64", "arm64"]
+    runs-on: ubuntu-20.04
+    if: contains(fromJSON('["push", "workflow_dispatch"]'), github.event_name)
+    needs: [create_release]
+    steps:
+    - name: download artifact
+      uses: actions/download-artifact@v1
+      with:
+        name: ${{ matrix.GOOS }}-${{ matrix.GOARCH }}
+    - name: upload artifact
+      uses: actions/upload-release-asset@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        upload_url: ${{ needs.create_release.outputs.url }}
+        asset_path: ${{ matrix.GOOS }}-${{ matrix.GOARCH }}/${{ matrix.GOOS }}-${{ matrix.GOARCH }}.tar.gz
+        asset_name: ${{ matrix.GOOS }}-${{ matrix.GOARCH }}.tar.gz
+        asset_content_type: application/gzip
+
+  clean_old:
+    runs-on: ubuntu-20.04
+    # Do not clean up old builds on workflow_dispatch to allow temporarily
+    # re-creating old releases for backports.
+    if: github.event_name == 'push'
+    needs: [upload_release]
+    steps:
+    - name: checkout
+      uses: actions/checkout@v3
+      with:
+        ref: ${{ inputs.ref || github.ref }}
+    - name: Delete older builds
+      run: ./.github/workflows/prune_old_builds.sh "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/prune_old_builds.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+set -euo pipefail
+
+KEEP=10
+GITHUB_TOKEN=$1
+
+delete_release() {
+    release_id=$1
+    tag_name=$2
+    set -x
+    curl -X DELETE --header "Authorization: Bearer $GITHUB_TOKEN" "https://api.github.com/repos/tailscale/go/releases/$release_id"
+    curl -X DELETE --header "Authorization: Bearer $GITHUB_TOKEN" "https://api.github.com/repos/tailscale/go/git/refs/tags/$tag_name"
+    set +x
+}
+
+curl https://api.github.com/repos/tailscale/go/releases 2>/dev/null |\
+    jq -r '.[] | "\(.published_at) \(.id) \(.tag_name)"' |\
+    egrep '[^ ]+ [^ ]+ build-[0-9a-f]{40}' |\
+    sort |\
+    head --lines=-${KEEP}|\
+    while read date release_id tag_name; do
+        delete_release "$release_id" "$tag_name"
+    done