example: fix hashes example

example/hashes/.gitignore

@@ -1 +1,2 @@
 /hashtest
+hashes.capnp.go

example/hashes/README.md

@@ -1,6 +1,12 @@
-cd to wherever you installed the source:
+# RPC Example: Hashses
 
-`cd /path/to/go-capnp/example/hashes`
+## Running the example
+
+Navigate to the example directory:
+
+```bash
+cd /path/to/go-capnp/example/hashes`
+````
 
 Compile the capnp file:
 
@@ -9,6 +15,11 @@ Compile the capnp file:
 Build your code, and run it:
 
 ```
-go build .
-./hashtest
+go run cmd/hashesserver.go
 ```
+
+The output of the example should be the following
+
+```bash
+sha1: 0a0a9f2a6772942557ab5355d76af442f8f65e01
+```

example/hashes/hashesserver.go → example/hashes/cmd/hashesserver.go

@@ -4,13 +4,15 @@ import (
 	"crypto/sha1"
 	"fmt"
 	"hash"
+	hashes "hashtest"
 	"io"
+	"log"
 	"net"
 	"os"
 
 	"context"
-	"hashes"
 
+	"capnproto.org/go/capnp/v3"
 	"capnproto.org/go/capnp/v3/rpc"
 )
 
@@ -33,6 +35,7 @@ func (hf hashFactory) NewSha1(_ context.Context, call hashes.HashFactory_newSha1
 
 // hashServer is a local implementation of Hash.
 type hashServer struct {
+	// The state of the server
 	h hash.Hash
 }
 
@@ -58,11 +61,11 @@ func (hs hashServer) Sum(_ context.Context, call hashes.Hash_sum) error {
 
 func serveHash(ctx context.Context, rwc io.ReadWriteCloser) error {
 	// Create a new locally implemented HashFactory.
-	main := hashes.HashFactory_ServerToClient(hashFactory{}, nil)
+	client := hashes.HashFactory_ServerToClient(hashFactory{})
 
 	// Listen for calls, using the HashFactory as the bootstrap interface.
 	conn := rpc.NewConn(rpc.NewStreamTransport(rwc), &rpc.Options{
-		BootstrapClient: main.Client,
+		BootstrapClient: capnp.Client(client),
 	})
 	defer conn.Close()
 
@@ -75,20 +78,19 @@ func serveHash(ctx context.Context, rwc io.ReadWriteCloser) error {
 	}
 }
 
-func client(ctx context.Context, rwc io.ReadWriteCloser) error {
+func callRpc(ctx context.Context, rwc io.ReadWriteCloser) error {
 	// Create a connection that we can use to get the HashFactory.
 	conn := rpc.NewConn(rpc.NewStreamTransport(rwc), nil) // nil sets default options
 	defer conn.Close()
 
 	// Get the "bootstrap" interface.  This is the capability set with
 	// rpc.MainInterface on the remote side.
-	hf := hashes.HashFactory{Client: conn.Bootstrap(ctx)}
+	hf := hashes.HashFactory(conn.Bootstrap(ctx))
 
 	// Now we can call methods on hf, and they will be sent over c.
 	// The NewSha1 method does not have any parameters we can set, so we
 	// pass a nil function.
 	h, free := hf.NewSha1(ctx, nil)
-
 	defer free()
 
 	// 'NewSha1' returns a future, which allows us to pipeline calls to
@@ -109,11 +111,9 @@ func client(ctx context.Context, rwc io.ReadWriteCloser) error {
 
 	// Get the sum, waiting for the result.
 	sumFuture, free := s.Sum(ctx, nil)
-
 	defer free()
 
 	result, err := sumFuture.Struct()
-
 	if err != nil {
 		return err
 	}
@@ -127,33 +127,45 @@ func client(ctx context.Context, rwc io.ReadWriteCloser) error {
 	return nil
 }
 
-func chkfatal(err error) {
-	if err != nil {
-		panic(err)
-	}
-}
-
 func main() {
-
 	err := os.RemoveAll(SOCK_ADDR)
-	chkfatal(err)
+	if err != nil {
+		log.Fatal(err)
+	}
 
 	l, err := net.Listen("unix", SOCK_ADDR)
-	chkfatal(err)
+	if err != nil {
+		log.Fatal(err)
+	}
 
-	defer l.Close()
+	defer func(l net.Listener) {
+		err := l.Close()
+		if err != nil {
+			log.Fatal(err)
+		}
+	}(l)
 
 	ctx := context.Background()
 
 	go func() {
 		c1, err := l.Accept()
-		chkfatal(err)
-
-		serveHash(ctx, c1)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		err = serveHash(ctx, c1)
+		if err != nil {
+			log.Println(err)
+		}
 	}()
 
 	c2, err := net.Dial("unix", SOCK_ADDR)
-	chkfatal(err)
+	if err != nil {
+		log.Fatal(err)
+	}
 
-	client(ctx, c2)
+	err = callRpc(ctx, c2)
+	if err != nil {
+		log.Fatal(err)
+	}
 }

example/hashes/go.mod

@@ -1,9 +1,10 @@
 module hashtest
 
-go 1.17
+go 1.18
 
-require capnproto.org/go/capnp/v3 v3.0.0-alpha.4
+require capnproto.org/go/capnp/v3 v3.0.0-alpha.30
 
-require hashes v1.0.0 // indirect
-
-replace hashes v1.0.0 => ./hashes
+require (
+	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 // indirect
+	zenhack.net/go/util v0.0.0-20230414204917-531d38494cf5 // indirect
+)

example/hashes/go.sum

@@ -1,29 +1,12 @@
-capnproto.org/go/capnp/v3 v3.0.0-alpha.1 h1:lA/zWC1XgaFez/UdqcWi5Bz1grsqPQDY5Ki4lgYrQ1o=
-capnproto.org/go/capnp/v3 v3.0.0-alpha.1/go.mod h1:izbWjXlvObqHwvhxwDBFLpY9lXSXIxDKRtnuktKHVsU=
-github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
+capnproto.org/go/capnp/v3 v3.0.0-alpha.30 h1:iABQan/YiHFCgSXym5aNj27osapnEgAk4WaWYqb4sQM=
+capnproto.org/go/capnp/v3 v3.0.0-alpha.30/go.mod h1:+ysMHvOh1EWNOyorxJWs1omhRFiDoKxKkWQACp54jKM=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/philhofer/fwd v1.1.1 h1:GdGcTjf5RNAxwS4QLsiMzJYj5KEvPJD3Abr261yRQXQ=
-github.com/philhofer/fwd v1.1.1/go.mod h1:gk3iGcWd9+svBvR0sR+KPcfE+RNWozjowpeBVG3ZVNU=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
 github.com/tinylib/msgp v1.1.5 h1:2gXmtWueD2HefZHQe1QOy9HVzmFrLOVvsXwXBQ0ayy0=
-github.com/tinylib/msgp v1.1.5/go.mod h1:eQsjooMTnV42mHu917E26IogZ2930nFyBQdofk10Udg=
-github.com/ttacon/chalk v0.0.0-20160626202418-22c06c80ed31/go.mod h1:onvgF043R+lC5RZ8IT9rBXDaEDnpnw/Cl+HFiw+v/7Q=
-github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20201022035929-9cf592e881e9/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+zenhack.net/go/util v0.0.0-20230414204917-531d38494cf5 h1:yksDCGMVzyn3vlyf0GZ3huiF5FFaMGQpQ3UJvR0EoGA=
+zenhack.net/go/util v0.0.0-20230414204917-531d38494cf5/go.mod h1:1LtNdPAs8WH+BTcQiZAOo2MIKD/5jyK/u7sZ9ZPe5SE=

example/hashes/hashes/hashes.capnp → example/hashes/hashes.capnp

@@ -1,5 +1,7 @@
-using Go = import "/go.capnp";
 @0xdb8274f9144abc7e;
+
+using Go = import "/go.capnp";
+
 $Go.package("hashes");
 $Go.import("foo/hashes");