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mjbond-msftmjbond-msft
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Relocate pipeline YAML file from the yaml-templates repo (#27)
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‎backport-bot.yml

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trigger: none
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parameters:
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- name: BackportRepoName
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displayName: Backport Repository Name
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type: string
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- name: BackportRepoOrg
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displayName: Backport Repository Organization
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type: string
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- name: BackportTargetBranch
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displayName: Backport Target Branch
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type: string
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- name: BackportPRNumber
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displayName: Backport Pull Request Number
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type: number
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- name: BackportHeadSHA
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displayName: Tip of the source PR
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type: string
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- name: UseFork
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displayName: Use a fork to create PRs
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type: boolean
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default: false
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variables:
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- name: GitHubEndpoint
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value: ${{ parameters.BackportRepoOrg }}
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- name: SourceRepo
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value: ${{ parameters.BackportRepoOrg }}/${{ parameters.BackportRepoName }}
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- name: TargetBranch
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value: ${{ parameters.BackportTargetBranch }}
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- name: SourceBranch
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value: "backport-pr-${{ parameters.BackportPRNumber }}-to-$(TargetBranch)"
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- group: Xamarin-Secrets
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- name: GitHubApiPrUri
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value: "https://api.github.com/repos/$(SourceRepo)/pulls/${{ parameters.BackportPRNumber }}"
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resources:
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repositories:
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- repository: backportRepo
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type: github
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# TODO: is there a way to not hardcode the endpoint?
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endpoint: xamarin
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name: $(SourceRepo)
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ref: $(TargetBranch)
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jobs:
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- job: BackportBot
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pool:
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vmImage: ubuntu-latest
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variables:
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- name: ChangesPatch
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value: $(Build.ArtifactStagingDirectory)/changes.patch
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- name: WorkingDir
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value: $(Build.SourcesDirectory)/${{ parameters.BackportRepoName }}
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steps:
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- checkout: self
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- checkout: backportRepo
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persistCredentials: true
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- powershell: |
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Write-Host "BackportRepoName: ${{ parameters.BackportRepoName }}"
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Write-Host "BackportRepoOrg: ${{ parameters.BackportRepoOrg }}"
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Write-Host "BackportTargetBranch: ${{ parameters.BackportTargetBranch }}"
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Write-Host "BackportPRNumber: ${{ parameters.BackportPRNumber }}"
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Write-Host "BackportHeadSHA: ${{ parameters.BackportHeadSHA }}"
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Write-Host "UseFork: ${{ parameters.UseFork}}"
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displayName: Debug parameters
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# TODO: redundant, but echo git version
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- powershell: |
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git --version
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git status > $(Build.ArtifactStagingDirectory)/git_status.txt
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Get-Content $(Build.ArtifactStagingDirectory)/git_status.txt
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git diff > $(Build.ArtifactStagingDirectory)/git_diff.txt
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git checkout -b $(SourceBranch)
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workingDirectory: $(WorkingDir)
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displayName: Checkout Backport Branch
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- powershell: |
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$headers = @{ Authorization = "token $(github--pat--vs-mobiletools-engineering-service2)"; Accept = "application/vnd.github.v3.patch" }
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Write-Host "Grabbing PR Patch from ${{ variables.GitHubApiPrUri }}"
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Invoke-Webrequest -UseBasicParsing -OutFile $(ChangesPatch) -Headers $headers -Uri "${{ variables.GitHubApiPrUri }}"
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displayName: Grab Patch File
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# TODO: try and grab PR author
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- powershell: |
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git config --global credential.helper store
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Set-Content -Path "$HOME\.git-credentials" -Value "https://$(github--pat--vs-mobiletools-engineering-service2):x-oauth-basic@github.com`n" -NoNewline
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git config user.email "valco@microsoft.com"
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git config user.name "vs-mobiletools-engineering-service2"
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Write-Host "git am $(ChangesPatch) --3way --ignore-whitespace --keep-non-patch --exclude=`"external/api-snapshot`""
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git am $(ChangesPatch) --3way --ignore-whitespace --keep-non-patch --exclude="external/api-snapshot" > $(Build.ArtifactStagingDirectory)/am_output.txt 2>&1
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$result = $(git status)
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if ($result.Contains("You are in the middle of an am session")) {
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throw "Merge conflict. Please backport manually"
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}
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workingDirectory: $(WorkingDir)
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displayName: Apply Patch
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# - powershell: |
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# Write-Host "git filter-branch --prune-empty -f $(SourceRef)..HEAD"
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# git filter-branch --prune-empty -f $(SourceRef)..HEAD > $(Build.ArtifactStagingDirectory)/filter_status.txt 2>&1
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# workingDirectory: $(WorkingDir)
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# displayName: Filter Branch
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# try to retrieve the repo for the bot, if not present, create it
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- powershell: |
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$headers = @{ Authorization = "token $(github--pat--vs-mobiletools-engineering-service2)"; Accept = "application/vnd.github.v3.patch" }
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try {
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$response = Invoke-Webrequest -UseBasicParsing -Headers $headers -Uri "https://api.github.com/repos/vs-mobiletools-engineering-service2/$Env:RepoName" | ConvertFrom-Json
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} catch {
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Write-Host "Fork was not found, creating one."
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# fork does not exist and has to be created, this is async, we are going to wait some time and then retry until we get that the fork was indeed created.
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$payload= @{
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owner = "vs-mobiletools-engineering-service2"
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repo = $Env:RepoName
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}
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try {
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$reposUri = "https://api.github.com/repos/$Env:RepoOrg/$Env:RepoName/forks"
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Write-Host "Creating fork via $reposUri and $($payload | ConvertTo-json )"
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$response = Invoke-Webrequest -Method POST -UseBasicParsing -Headers $headers -Uri $reposUri -Body ($payload | ConvertTo-json)
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Write-Host "Response was $response"
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$count = 0
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#give some time
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Start-Sleep -Seconds 5
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do {
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try {
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# if we do not have the fork just yet, an exception is thrown, we wait and try again
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$response = Invoke-Webrequest -UseBasicParsing -Headers $headers -Uri "https://api.github.com/repos/vs-mobiletools-engineering-service2/$Env:RepoName" | ConvertFrom-Json
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break
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} catch {
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if ($count -gt 10) {
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# notify and throw
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Write-Host "Could not access fork vs-mobiletools-engineering-service2/$Env:RepoName after 10 attempts."
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throw $_.Exception
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} else {
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$count = $count + 1
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$seconds = 5 * $count
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Write-Host "Error performing request trying in $seconds seconds"
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Start-Sleep -Seconds $seconds
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}
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}
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} while ($true)
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} catch {
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Write-Host "Could not create fork vs-mobiletools-engineering-service2/$Env:RepoName."
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throw $_.Exception
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}
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}
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Write-Host "Adding remote to local git."
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# add remote so that we do push there
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$remoteUrl = "https://github.com/vs-mobiletools-engineering-service2/" + $Env:RepoName + ".git"
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Write-Host "Using remote at '$remoteUrl'"
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git remote add vs-mobiletools-engineering-service2 $remoteUrl
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git remote -v
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workingDirectory: $(WorkingDir)
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displayName: Create fork
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condition: ${{ parameters.UseFork }}
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env:
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RepoName: ${{ parameters.BackportRepoName }}
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RepoOrg: ${{ parameters.BackportRepoOrg }}
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- powershell: |
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git push -f -u vs-mobiletools-engineering-service2 HEAD:$(SourceBranch)
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workingDirectory: $(WorkingDir)
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displayName: Push Branch to Fork
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condition: ${{ parameters.UseFork }}
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- powershell: |
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git push -f -u origin HEAD:$(SourceBranch)
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workingDirectory: $(WorkingDir)
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displayName: Push Branch
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condition: not(${{ parameters.UseFork }})
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# Grab PR details and
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- powershell: |
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Write-Host "Grabbing PR details from ${{ variables.GitHubApiPrUri }}"
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$headers = @{ Authorization = "token $(github--pat--vs-mobiletools-engineering-service2)"; Accept = "application/json" }
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$response = Invoke-WebRequest -Headers $headers -uri "${{ variables.GitHubApiPrUri }}"
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$content = $response.Content | ConvertFrom-Json
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$title = "[$(TargetBranch)] $($content.title)" -replace '[\u00A0]', ' '
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# pws + json does not like /n but append line works
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$msg = [System.Text.StringBuilder]::new()
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$msg.AppendLine("$($content.body)")
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$msg.AppendLine()
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$msg.AppendLine()
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$msg.AppendLine("Backport of #${{ parameters.BackportPRNumber }}")
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Write-Host "Use Fork? $Env:UseFork"
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$head = "$(SourceBranch)"
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if ("$Env:UseFork".ToLower() -eq "true") {
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$head = "vs-mobiletools-engineering-service2:$(SourceBranch)"
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}
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$payload=@{
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title = $title
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body = $msg.ToString()
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head = "$head"
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base = "$(TargetBranch)"
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maintainer_can_modify = $true
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}
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$headers = @{ Authorization = "token $(github--pat--vs-mobiletools-engineering-service2)" }
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# let it throw
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$response = Invoke-WebRequest -UseBasicParsing -Method POST -Headers $headers -Uri "https://api.github.com/repos/$(SourceRepo)/pulls" -Body ($payload | ConvertTo-json)
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$newPr = $response.Content | ConvertFrom-Json
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Write-Host "Response is $newPr"
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# add labels to the new created PR
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[System.Collections.Generic.List[string]]$labels= @()
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$labels.Add("backported")
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# get the labels from the old PR which are stored in $content
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foreach ($labelInfo in $content.labels) {
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$labelName = $labelInfo.name
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Write-Host "Found label $labelName"
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$labels.Add($labelName)
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}
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$payload=@{
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labels = $labels
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}
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Write-Host "https://api.github.com/repos/(SourceRepo)/issues/$($response.number)/labels"
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$response = Invoke-WebRequest -UseBasicParsing -Method PUT -Headers $headers -Uri "https://api.github.com/repos/$(SourceRepo)/issues/$($newPr.number)/labels" -Body ($payload | ConvertTo-json)
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displayName: Open Pull Request
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env:
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UseFork: ${{ parameters.UseFork }}
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BackportRepoOrg: ${{ parameters.BackportRepoOrg }}
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BackportRepoName: ${{ parameters.BackportRepoName }}
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- publish: $(Build.ArtifactStagingDirectory)
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artifact: patch
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condition: always()
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- powershell: |
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if ("$(Agent.JobStatus)".Equals("Succeeded")) {
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$state = "success"
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$desc = "succeeded"
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$message = "Hooray"
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} else {
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$state = "failure"
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$desc = "failed"
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$message = "Oh no"
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}
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$buildUri = "$(System.CollectionUri)$(System.TeamProject)/_build/results?buildId=$(Build.BuildId)"
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$statusJson = @{
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state = $state;
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description = "Backport $desc`.";
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target_url = $buildUri;
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context = "Backport to $(TargetBranch)"
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} | ConvertTo-Json
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$uri = "https://api.github.com/repos/${{ parameters.BackportRepoOrg }}/${{ parameters.BackportRepoName }}/statuses/${{ parameters.BackportHeadSHA }}"
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Write-Host "Reporting to status api at $uri"
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Write-Host $statusJson
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$headers = @{ Authorization = "token $(github--pat--vs-mobiletools-engineering-service2)" }
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Invoke-WebRequest -UseBasicParsing -Method POST -Headers $headers -Uri $uri -Body $statusJson
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# Comment on the original PR
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$commentJson = @{
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body = "$message! Backport $desc`! Please see $buildUri for more details."
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} | ConvertTo-Json
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$commentApi = "https://api.github.com/repos/${{ parameters.BackportRepoOrg }}/${{ parameters.BackportRepoName }}/issues/${{ parameters.BackportPRNumber }}/comments"
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Write-Host "Commenting on original PR via $commentApi"
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Invoke-WebRequest -UseBasicParsing -Method POST -Headers $headers -Uri $commentApi -Body $commentJson
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displayName: Report Status on PR
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condition: always()

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