remove_gh_artifacts.sh

#!/bin/bash

# Change the date under CUTOFF_DATE to change how far back you want to delete
# Install the GitHub CLI tool by following the instructions in the official documentation: https://cli.github.com/manual/installation
# Make sure you auth first to github with 'gh auth login'

REPO_OWNER="OWNER"
REPO_NAME="REPO_NAME"
CUTOFF_DATE=$(date --date='30 days ago' +'%Y-%m-%dT%H:%M:%SZ')
PAGE=1

while true; do
  # Retrieve a page of artifacts
  ART_EXIST=$(gh api repos/$REPO_OWNER/$REPO_NAME/actions/artifacts?per_page=100\&page=$PAGE | jq -r '.artifacts[]')
  ARTIFACTS=$(gh api repos/$REPO_OWNER/$REPO_NAME/actions/artifacts?per_page=100\&page=$PAGE | jq -r '.artifacts[] | select(.created_at < "'"$CUTOFF_DATE"'") | .id')
  echo $PAGE
  # If there are no more artifacts, exit the loop
  if [[ -z "$ART_EXIST" ]]; then
    break
  fi

  # Loop through the artifacts on this page and delete the old ones
  for ARTIFACT_ID in $ARTIFACTS; do
    ARTIFACT_NAME=$(gh api repos/$REPO_OWNER/$REPO_NAME/actions/artifacts/$ARTIFACT_ID | jq -r '.name')
    echo "Deleting artifact $ARTIFACT_NAME (ID: $ARTIFACT_ID)..."
    gh api repos/$REPO_OWNER/$REPO_NAME/actions/artifacts/$ARTIFACT_ID -X DELETE
  done

  # Increment the page counter
  PAGE=$((PAGE+1))
done

Thanks for sharing this! You might want to add --silent at the end of the delete call so that the script doesn't get interrupted by the response body.

Tweaked the PowerShell option above to support the pagination, different retention for the main branch and include some size estimates in the output:

$repoOwner = "OWNER"
$repoName = "REPO_NAME"
$mainRetentionDate = (Get-Date).AddDays(-30)
$branchRetentionDate = (Get-Date).AddDays(-7)
$pageSize = 100
$page = 1

# Retrieve first page of artifacts
$response = gh api "repos/$repoOwner/$repoName/actions/artifacts?per_page=$pageSize&page=$page" | ConvertFrom-Json
$total_pages = [math]::Ceiling(($response.total_count / $pageSize))

$artifacts = $response.artifacts

# Paginate remainder
for ($page = 2; $page -le $total_pages; $page++) {
  $response = gh api "repos/$repoOwner/$repoName/actions/artifacts?per_page=$pageSize&page=$page" | ConvertFrom-Json
  $artifacts += $response.artifacts
}

Write-Host ('Total artifact count: ' + $artifacts.Length)
Write-Host ('Total artifact size (bytes): ' + ($artifacts | Measure-Object -Property size_in_bytes -Sum).Sum)

$spaceSaved = 0
foreach ($artifact in $artifacts) {
  switch ($artifact.workflow_run_head_branch) {
    'main' { 
      if ( (Get-Date $artifact.created_at) -lt $mainRetentionDate) {
        Write-Host ('Removing artifact with id: ' + $artifact.id + `
            ' name: ' + $artifact.name + `
            ' created at ' + $artifact.created_at + `
            ' for branch ' + $artifact.workflow_run.head_branch)
        
        #Remove
        gh api "repos/$repoOwner/$repoName/actions/artifacts/$($artifact.id)" -X Delete --silent | Out-Null
        
        $spaceSaved += $artifact.size_in_bytes
      }
    }
    Default {
      if ( (Get-Date $artifact.created_at) -lt $branchRetentionDate) {
        Write-Host ('Removing artifact with id: ' + $artifact.id + `
            ' name: ' + $artifact.name + `
            ' created at ' + $artifact.created_at + `
            ' for branch ' + $artifact.workflow_run.head_branch)
        
        #Remove
        gh api "repos/$repoOwner/$repoName/actions/artifacts/$($artifact.id)" -X Delete | Out-Null

        $spaceSaved += $artifact.size_in_bytes
      }
    }
  }
}

Write-Host 'Total space saved (bytes): ' $spaceSaved

e.g.:

Total artifact count: 279
Total artifact size (bytes): 1331854445
...
Removing artifact with id: 1859067075 name: playwright-report created at 08/27/2024 10:50:44 for branch main
Removing artifact with id: 1859064083 name: hugo-public created at 08/27/2024 10:49:57 for branch main
Removing artifact with id: 1846106084 name: playwright-report created at 08/23/2024 08:18:41 for branch main
Removing artifact with id: 1846079142 name: playwright-report created at 08/23/2024 08:11:01 for branch main
Removing artifact with id: 1833212961 name: playwright-report created at 08/20/2024 15:50:48 for branch main
Total space saved (bytes):  1207672413