/
main.go
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/
main.go
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// SPDX-FileCopyrightText: 2022 Sascha Brawer <sascha@brawer.ch>
// SPDX-License-Identifier: MIT
package main
import (
"context"
"encoding/json"
"flag"
"fmt"
"log"
"os"
"path/filepath"
"time"
"github.com/minio/minio-go/v7"
"github.com/minio/minio-go/v7/pkg/credentials"
)
var logger *log.Logger
func main() {
ctx := context.Background()
var dumps = flag.String("dumps", "/public/dumps/public", "path to Wikimedia dumps")
var testRun = flag.Bool("testRun", false, "if true, we process only a small fraction of the data; used for testing")
storagekey := flag.String("", "", "path to key with storage access credentials")
flag.Parse()
// https://wikitech.wikimedia.org/wiki/Help:Toolforge/Build_Service#Using_NFS_shared_storage
if toolDir := os.Getenv("TOOL_DATA_DIR"); toolDir != "" {
if err := os.Chdir(toolDir); err != nil {
log.Fatal(err)
}
}
workdir, _ := os.Getwd()
logPath := filepath.Join("logs", "qrank-builder.log")
fmt.Printf("logs written to %s in workdir=%s", logPath, workdir)
fmt.Fprintf(os.Stderr, "logs written to %s in workdir=%s", logPath, workdir)
logfile, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
log.Fatal(err)
}
defer logfile.Close()
logger = log.New(logfile, "", log.Ldate|log.Ltime|log.LUTC|log.Lshortfile)
logger.Printf("qrank-builder starting up")
storage, err := NewStorageClient(*storagekey)
if err != nil {
logger.Fatal(err)
}
bucketExists, err := storage.BucketExists(ctx, "qrank")
if err != nil {
logger.Fatal(err)
}
if !bucketExists {
logger.Fatal("storage bucket \"qrank\" does not exist")
}
if err := computeQRank(*dumps, *testRun, storage); err != nil {
logger.Printf("ComputeQRank failed: %v", err)
log.Fatal(err)
return
}
logger.Printf("qrank-builder exiting")
}
// NewStorageClient sets up a client for accessing S3-compatible object storage.
func NewStorageClient(keypath string) (*minio.Client, error) {
var config struct{ Endpoint, Key, Secret string }
if keypath == "" {
config.Endpoint = os.Getenv("S3_ENDPOINT")
config.Key = os.Getenv("S3_KEY")
config.Secret = os.Getenv("S3_SECRET")
} else {
data, err := os.ReadFile(keypath)
if err != nil {
return nil, err
}
if err := json.Unmarshal(data, &config); err != nil {
return nil, err
}
}
client, err := minio.New(config.Endpoint, &minio.Options{
Creds: credentials.NewStaticV4(config.Key, config.Secret, ""),
Secure: true,
})
if err != nil {
return nil, err
}
client.SetAppInfo("QRankBuilder", "0.1")
return client, nil
}
func computeQRank(dumpsPath string, testRun bool, storage *minio.Client) error {
ctx := context.Background()
var s3 S3 = storage
// Build pageviews files. We're changing how pageviews get aggregated,
// and this is the new, vastly more efficient approach. But it is not
// fully implemented yet, so we do not yet actually use the output.
// The older approach is done by the call to processPageviews below.
// https://github.com/brawer/wikidata-qrank/issues/23
_, err := buildPageviews(ctx, dumpsPath, 52, s3) // for past 52 weeks
if err != nil {
return err
}
sites, err := ReadWikiSites(dumpsPath)
if err != nil {
return err
}
logger.Printf("found wikimedia dumps for %d sites", len(*sites))
if err := buildPageEntities(ctx, dumpsPath, sites, s3); err != nil {
return err
}
// TOOD: The following is just a benchmark to see how long it takes
// to read all page_entities within the Wikimedia datacenter.
// Once we know it's reasonable to do this, we can remove this code.
logger.Printf("start reading page_entities")
numEntities := 0
scanner := NewPageEntitiesScanner(sites, s3)
for scanner.Scan() {
numEntities += 1
if numEntities < 5 || numEntities%1000000 == 0 {
logger.Printf(" %d: %s\n", numEntities, scanner.Text())
}
}
if err := scanner.Err(); err != nil {
return err
}
logger.Printf("finished reading %d page_entities", numEntities)
// TODO: Old code starts here, remove after new implementation is done.
return nil
outDir := "cache"
if testRun {
outDir = "cache-testrun"
}
if err := os.MkdirAll(outDir, 0755); err != nil {
return err
}
if err := CleanupCache(outDir); err != nil {
return err
}
edate, epath, err := findEntitiesDump(dumpsPath)
if err != nil {
return err
}
pageviews, err := processPageviews(testRun, dumpsPath, edate, outDir, ctx)
if err != nil {
return err
}
sitelinks, err := processEntities(testRun, epath, edate, outDir, ctx)
if err != nil {
return err
}
qviews, err := buildQViews(testRun, edate, sitelinks, pageviews, outDir, ctx)
if err != nil {
return err
}
qrank, err := buildQRank(edate, qviews, outDir, ctx)
if err != nil {
return err
}
stats, err := buildStats(edate, qrank, 50, 1000, outDir)
if err != nil {
return err
}
if storage != nil {
if err := upload(edate, qrank, stats, storage); err != nil {
return err
}
}
return nil
}
// Upload puts the final output files into an S3-compatible object storage.
func upload(date time.Time, qrank, stats string, storage *minio.Client) error {
ymd := date.Format("20060102")
qrankDest := fmt.Sprintf("public/qrank-%s.csv.gz", ymd)
if err := uploadFile(qrankDest, qrank, "text/csv", storage); err != nil {
return err
}
statsDest := fmt.Sprintf("public/qrank-stats-%s.json", ymd)
if err := uploadFile(statsDest, stats, "application/json", storage); err != nil {
return err
}
return nil
}
// UploadFile puts one single file into an S3-compatible object storage.
func uploadFile(dest, src, contentType string, storage *minio.Client) error {
ctx := context.Background()
bucket := "qrank"
// Check if the output file already exists in storage.
_, err := storage.StatObject(ctx, bucket, dest, minio.StatObjectOptions{})
if err == nil {
logmsg := fmt.Sprintf("Already in object storage: %s/%s", bucket, dest)
fmt.Println(logmsg)
if logger != nil {
logger.Println(logmsg)
}
return nil
}
opts := minio.PutObjectOptions{ContentType: contentType}
_, err = storage.FPutObject(ctx, bucket, dest, src, opts)
if err != nil {
return err
}
logmsg := fmt.Sprintf("Uploaded to object storage: %s/%s", bucket, dest)
fmt.Println(logmsg)
if logger != nil {
logger.Println(logmsg)
}
return nil
}