1 files changed, 58 insertions, 0 deletions
diff --git a/skate/cmd/skate-map/main.go b/skate/cmd/skate-map/main.go
new file mode 100644
index 0000000..c5fb798
--- /dev/null
+++ b/skate/cmd/skate-map/main.go
@@ -0,0 +1,58 @@
+// skate-map runs a given map function over input data. We mostly want to
+// extract a key from a json document.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"runtime"
+	"text/tabwriter"
+
+	"git.archive.org/martin/cgraph/skate"
+	"git.archive.org/martin/cgraph/skate/parallel"
+)
+
+var (
+	mapperName = flag.String("m", "", "mapper to run")
+	numWorkers = flag.Int("w", runtime.NumCPU(), "number of workers")
+	batchSize  = flag.Int("b", 50000, "batch size")
+	verbose    = flag.Bool("verbose", false, "show progress")
+	extraValue = flag.String("x", "", "extra value to pass to configurable mappers")
+)
+
+func main() {
+	flag.Parse()
+	// XXX: introduce prefixes
+	availableMappers := map[string]skate.Mapper{
+		"id":    skate.Identity,
+		"ff":    skate.CreateFixedFieldFunc(*extraValue),
+		"title": skate.MapperTitle,
+		"tnorm": skate.MapperTitleNormalized,
+		"tnysi": skate.MapperTitleNysiis,
+		"tsand": skate.MapperTitleSandcrawler,
+	}
+	switch {
+	case *mapperName != "":
+		if f, ok := availableMappers[*mapperName]; !ok {
+			log.Fatal("unknown mapper name: %v", *mapperName)
+		} else {
+			pp := parallel.NewProcessor(os.Stdin, os.Stdout, f)
+			pp.NumWorkers = *numWorkers
+			pp.BatchSize = *batchSize
+			pp.Verbose = *verbose
+			if err := pp.Run(); err != nil {
+				log.Fatal(err)
+			}
+		}
+	default:
+		fmt.Println("skate-map available mappers")
+		fmt.Println()
+		w := tabwriter.NewWriter(os.Stdout, 0, 0, 4, ' ', 0)
+		for k, v := range availableMappers {
+			fmt.Fprintf(w, "%s\t%s\n", k, skate.NameOf(v))
+		}
+		w.Flush()
+	}
+}