fix filenames, set up go generate

example/README.md

@@ -17,8 +17,7 @@ csilvers is Craig Silverstein
 
 It's already checked in to github, but to generate `generated.go`:
 ```sh
-rm example/generated.go
-go run ./cmd/genql/main.go example/genql.yaml
+go generate ./...
 ```
 
 ## Generating the schema files

example/caller.go

@@ -60,3 +60,5 @@ func Main() {
 	}
 	fmt.Println(username, "is", *userResp.User.TheirName)
 }
+
+//go:generate go run github.com/Khan/genql genql.yaml

generate/generate.go

@@ -4,6 +4,8 @@ import (
 	"bytes"
 	"fmt"
 	"go/format"
+	"path/filepath"
+	"runtime"
 	"strings"
 	"text/template"
 
@@ -12,9 +14,11 @@ import (
 )
 
 // TODO: package template into the binary using one of those asset thingies
-const tmplFilename = "generate/operation.go.tmpl"
+var _, thisFilename, _, _ = runtime.Caller(0)
+var tmplRelFilename = "operation.go.tmpl"
+var tmplAbsFilename = filepath.Join(filepath.Dir(thisFilename), tmplRelFilename)
 
-var tmpl = template.Must(template.ParseFiles(tmplFilename))
+var tmpl = template.Must(template.ParseFiles(tmplAbsFilename))
 
 type templateParams struct {
 	// The name of the package into which to generate the operation-helpers.

main.go

@@ -1,3 +1,4 @@
+// package main is at the root to allow "go run github.com/Khan/genql"
 package main
 
 import (