build: make rclone build with wasm

Needed to drop
- azureblob backend
- cache backend
- qingstor backend
- cachestats command
- ncdu command

backend/azureblob/azureblob.go

@@ -1,6 +1,6 @@
 // Package azureblob provides an interface to the Microsoft Azure blob object storage system
 
-// +build !plan9,!solaris,go1.13
+// +build !plan9,!solaris,!js,go1.13
 
 package azureblob
 

backend/azureblob/azureblob_internal_test.go

@@ -1,4 +1,4 @@
-// +build !plan9,!solaris,go1.13
+// +build !plan9,!solaris,!js,go1.13
 
 package azureblob
 

backend/azureblob/azureblob_test.go

@@ -1,6 +1,6 @@
 // Test AzureBlob filesystem interface
 
-// +build !plan9,!solaris,go1.13
+// +build !plan9,!solaris,!js,go1.13
 
 package azureblob
 

backend/azureblob/azureblob_unsupported.go

@@ -1,6 +1,6 @@
 // Build for azureblob for unsupported platforms to stop go complaining
 // about "no buildable Go source files "
 
-// +build plan9 solaris !go1.13
+// +build plan9 solaris js !go1.13
 
 package azureblob

backend/cache/cache.go

@@ -1,4 +1,4 @@
-// +build !plan9
+// +build !plan9,!js
 
 package cache
 

backend/cache/cache_internal_test.go

@@ -1,4 +1,4 @@
-// +build !plan9
+// +build !plan9,!js
 // +build !race
 
 package cache_test

backend/cache/cache_test.go

@@ -1,6 +1,6 @@
 // Test Cache filesystem interface
 
-// +build !plan9
+// +build !plan9,!js
 // +build !race
 
 package cache_test

backend/cache/cache_unsupported.go

@@ -1,6 +1,6 @@
 // Build for cache for unsupported platforms to stop go complaining
 // about "no buildable Go source files "
 
-// +build plan9
+// +build plan9 js
 
 package cache

backend/cache/cache_upload_test.go

@@ -1,4 +1,4 @@
-// +build !plan9
+// +build !plan9,!js
 // +build !race
 
 package cache_test

backend/cache/directory.go

@@ -1,4 +1,4 @@
-// +build !plan9
+// +build !plan9,!js
 
 package cache
 

backend/cache/handle.go

@@ -1,4 +1,4 @@
-// +build !plan9
+// +build !plan9,!js
 
 package cache
 

backend/cache/object.go

@@ -1,4 +1,4 @@
-// +build !plan9
+// +build !plan9,!js
 
 package cache
 

backend/cache/plex.go

@@ -1,4 +1,4 @@
-// +build !plan9
+// +build !plan9,!js
 
 package cache
 

backend/cache/storage_memory.go

@@ -1,4 +1,4 @@
-// +build !plan9
+// +build !plan9,!js
 
 package cache
 

backend/cache/storage_persistent.go

@@ -1,4 +1,4 @@
-// +build !plan9
+// +build !plan9,!js
 
 package cache
 

backend/local/lchtimes.go

@@ -1,4 +1,4 @@
-// +build windows plan9
+// +build windows plan9 js
 
 package local
 

backend/local/lchtimes_unix.go

@@ -1,4 +1,4 @@
-// +build !windows,!plan9
+// +build !windows,!plan9,!js
 
 package local
 

backend/qingstor/qingstor.go

@@ -1,7 +1,7 @@
 // Package qingstor provides an interface to QingStor object storage
 // Home: https://www.qingcloud.com/
 
-// +build !plan9
+// +build !plan9,!js
 
 package qingstor
 

backend/qingstor/qingstor_test.go

@@ -1,6 +1,6 @@
 // Test QingStor filesystem interface
 
-// +build !plan9
+// +build !plan9,!js
 
 package qingstor
 

backend/qingstor/qingstor_unsupported.go

@@ -1,6 +1,6 @@
 // Build for unsupported platforms to stop go complaining
 // about "no buildable Go source files "
 
-// +build plan9
+// +build plan9 js
 
 package qingstor

backend/qingstor/upload.go

@@ -1,6 +1,6 @@
 // Upload object to QingStor
 
-// +build !plan9
+// +build !plan9,!js
 
 package qingstor
 

bin/cross-compile.go

@@ -66,6 +66,7 @@ var osarches = []string{
 	"plan9/386",
 	"plan9/amd64",
 	"solaris/amd64",
+	"js/wasm",
 }
 
 // Special environment flags for a given arch
@@ -320,14 +321,16 @@ func compileArch(version, goos, goarch, dir string) bool {
 		return false
 	}
 	if !*compileOnly {
-		artifacts := []string{buildZip(dir)}
-		// build a .deb and .rpm if appropriate
-		if goos == "linux" {
-			artifacts = append(artifacts, buildDebAndRpm(dir, version, goarch)...)
-		}
-		if *copyAs != "" {
-			for _, artifact := range artifacts {
-				run("ln", artifact, strings.Replace(artifact, "-"+version, "-"+*copyAs, 1))
+		if goos != "js" {
+			artifacts := []string{buildZip(dir)}
+			// build a .deb and .rpm if appropriate
+			if goos == "linux" {
+				artifacts = append(artifacts, buildDebAndRpm(dir, version, goarch)...)
+			}
+			if *copyAs != "" {
+				for _, artifact := range artifacts {
+					run("ln", artifact, strings.Replace(artifact, "-"+version, "-"+*copyAs, 1))
+				}
 			}
 		}
 		// tidy up

cmd/cachestats/cachestats.go

@@ -1,4 +1,4 @@
-// +build !plan9
+// +build !plan9,!js
 
 package cachestats
 

cmd/cachestats/cachestats_unsupported.go

@@ -1,6 +1,6 @@
 // Build for cache for unsupported platforms to stop go complaining
 // about "no buildable Go source files "
 
-// +build plan9
+// +build plan9 js
 
 package cachestats

cmd/ncdu/ncdu.go

@@ -1,6 +1,6 @@
 // Package ncdu implements a text based user interface for exploring a remote
 
-//+build !plan9,!solaris
+//+build !plan9,!solaris,!js
 
 package ncdu
 

cmd/ncdu/ncdu_unsupported.go

@@ -1,6 +1,6 @@
 // Build for ncdu for unsupported platforms to stop go complaining
 // about "no buildable Go source files "
 
-// +build plan9 solaris
+// +build plan9 solaris js
 
 package ncdu

cmd/serve/restic/restic.go

@@ -21,8 +21,8 @@ import (
 	"github.com/rclone/rclone/fs/fserrors"
 	"github.com/rclone/rclone/fs/operations"
 	"github.com/rclone/rclone/fs/walk"
+	"github.com/rclone/rclone/lib/terminal"
 	"github.com/spf13/cobra"
-	"golang.org/x/crypto/ssh/terminal"
 	"golang.org/x/net/http2"
 )
 

fs/config/config_read_password.go

@@ -11,7 +11,7 @@ import (
 	"log"
 	"os"
 
-	"golang.org/x/crypto/ssh/terminal"
+	"github.com/rclone/rclone/lib/terminal"
 )
 
 // ReadPassword reads a password without echoing it to the terminal.

fs/log/redirect_stderr_unix.go

@@ -1,6 +1,6 @@
 // Log the panic under unix to the log file
 
-// +build !windows,!solaris,!plan9
+// +build !windows,!solaris,!plan9,!js
 
 package log
 

lib/mmap/mmap_unix.go

@@ -1,7 +1,7 @@
 // Package mmap implements a large block memory allocator using
 // anonymous memory maps.
 
-// +build !plan9,!windows
+// +build !plan9,!windows,!js
 
 package mmap
 

lib/mmap/mmap_unsupported.go

@@ -1,6 +1,6 @@
 // Fallback Alloc and Free for unsupported OSes
 
-// +build plan9
+// +build plan9 js
 
 package mmap
 

lib/terminal/terminal.go

@@ -9,7 +9,6 @@ import (
 	"sync"
 
 	colorable "github.com/mattn/go-colorable"
-	"golang.org/x/crypto/ssh/terminal"
 )
 
 // VT100 codes
@@ -72,7 +71,7 @@ var (
 func Start() {
 	once.Do(func() {
 		f := os.Stdout
-		if !terminal.IsTerminal(int(f.Fd())) {
+		if !IsTerminal(int(f.Fd())) {
 			// If stdout not a tty then remove escape codes
 			Out = colorable.NewNonColorable(f)
 		} else if runtime.GOOS == "windows" && os.Getenv("TERM") != "" {
@@ -89,16 +88,6 @@ func WriteString(s string) {
 	Write([]byte(s))
 }
 
-// GetSize reads the dimensions of the current terminal or returns a
-// sensible default
-func GetSize() (w, h int) {
-	w, h, err := terminal.GetSize(int(os.Stdout.Fd()))
-	if err != nil {
-		w, h = 80, 25
-	}
-	return w, h
-}
-
 // Out is an io.Writer which can be used to write to the terminal
 // eg for use with fmt.Fprintf(terminal.Out, "terminal fun: %d\n", n)
 var Out io.Writer

lib/terminal/terminal_normal.go

@@ -0,0 +1,31 @@
+//+build !js
+
+package terminal
+
+import (
+	"os"
+
+	"golang.org/x/crypto/ssh/terminal"
+)
+
+// GetSize reads the dimensions of the current terminal or returns a
+// sensible default
+func GetSize() (w, h int) {
+	w, h, err := terminal.GetSize(int(os.Stdout.Fd()))
+	if err != nil {
+		w, h = 80, 25
+	}
+	return w, h
+}
+
+// IsTerminal returns whether the fd passed in is a terminal or not
+func IsTerminal(fd int) bool {
+	return terminal.IsTerminal(fd)
+}
+
+// ReadPassword reads a line of input from a terminal without local echo. This
+// is commonly used for inputting passwords and other sensitive data. The slice
+// returned does not include the \n.
+func ReadPassword(fd int) ([]byte, error) {
+	return terminal.ReadPassword(fd)
+}

lib/terminal/terminal_unsupported.go

@@ -0,0 +1,23 @@
+//+build js
+
+package terminal
+
+import "errors"
+
+// GetSize reads the dimensions of the current terminal or returns a
+// sensible default
+func GetSize() (w, h int) {
+	return 80, 25
+}
+
+// IsTerminal returns whether the fd passed in is a terminal or not
+func IsTerminal(fd int) bool {
+	return false
+}
+
+// ReadPassword reads a line of input from a terminal without local echo. This
+// is commonly used for inputting passwords and other sensitive data. The slice
+// returned does not include the \n.
+func ReadPassword(fd int) ([]byte, error) {
+	return nil, errors.New("can't read password")
+}