travis,unit: fix and check unit code generation

Also fix blas generate check for move.

.travis/check-generate.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 
-go generate gonum.org/v1/gonum/blas/native
+go generate gonum.org/v1/gonum/blas/gonum
+go generate gonum.org/v1/gonum/unit
 if [ -n "$(git diff)" ]; then
 	exit 1
 fi

unit/autogen.go

@@ -1,3 +1,9 @@
+// Copyright ©2014 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
 package main
 
 import (
@@ -197,7 +203,7 @@ func init() {
 		log.Fatal("no gopath")
 	}
 
-	unitPkgPath = filepath.Join(gopath, "src", "github.com", "gonum", "unit")
+	unitPkgPath = filepath.Join(gopath, "src", "gonum.org", "v1", "gonum", "unit")
 }
 
 // Generate generates a file for each of the units
@@ -207,8 +213,7 @@ func main() {
 	}
 }
 
-const headerTemplate = `// This file is autogenerated by github.com/gonum/unit/autogen
-// Changes should be made to the autogenerated template rather than this one
+const headerTemplate = `// Code generated by "go generate gonum.org/v1/gonum/unit”; DO NOT EDIT.
 
 // Copyright ©2014 The gonum Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
@@ -280,18 +285,20 @@ func ({{.Receiver}} {{.Name}}) Format(fs fmt.State, c rune){
 		fallthrough
 	case 'e', 'E', 'f', 'F', 'g', 'G':
 		p, pOk := fs.Precision()
-		if !pOk {
-			p = -1
-		}
 		w, wOk := fs.Width()
-		if !wOk {
-			w = -1
-		}
+		switch {
+		case pOk && wOk:
 			fmt.Fprintf(fs, "%*.*"+string(c), w, p, float64({{.Receiver}}))
+		case pOk:
+			fmt.Fprintf(fs, "%.*"+string(c), p, float64({{.Receiver}}))
+		case wOk:
+			fmt.Fprintf(fs, "%*"+string(c), w, float64({{.Receiver}}))
+		default:
+			fmt.Fprintf(fs, "%"+string(c), float64({{.Receiver}}))
+		}
 		fmt.Fprint(fs, " {{.PrintString}}")
 	default:
 		fmt.Fprintf(fs, "%%!%c(%T=%g {{.PrintString}})", c, {{.Receiver}}, float64({{.Receiver}}))
-	return
 	}
 }
 `

unit/doc.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:generate go run autogen.go
+
 // Package unit provides a set of types and constants that facilitate
 // the use of the International System of Units (SI).
 //

unit/length.go

@@ -1,5 +1,4 @@
-// This file is autogenerated by github.com/gonum/unit/autogen
-// Changes should be made to the autogenerated template rather than this one
+// Code generated by "go generate gonum.org/v1/gonum/unit”; DO NOT EDIT.
 
 // Copyright ©2014 The gonum Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
@@ -87,6 +86,5 @@ func (l Length) Format(fs fmt.State, c rune) {
 		fmt.Fprint(fs, " m")
 	default:
 		fmt.Fprintf(fs, "%%!%c(%T=%g m)", c, l, float64(l))
-		return
 	}
 }

unit/mass.go

@@ -1,5 +1,4 @@
-// This file is autogenerated by github.com/gonum/unit/autogen
-// Changes should be made to the autogenerated template rather than this one
+// Code generated by "go generate gonum.org/v1/gonum/unit”; DO NOT EDIT.
 
 // Copyright ©2014 The gonum Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
@@ -87,6 +86,5 @@ func (m Mass) Format(fs fmt.State, c rune) {
 		fmt.Fprint(fs, " kg")
 	default:
 		fmt.Fprintf(fs, "%%!%c(%T=%g kg)", c, m, float64(m))
-		return
 	}
 }

unit/time.go

@@ -1,5 +1,4 @@
-// This file is autogenerated by github.com/gonum/unit/autogen
-// Changes should be made to the autogenerated template rather than this one
+// Code generated by "go generate gonum.org/v1/gonum/unit”; DO NOT EDIT.
 
 // Copyright ©2014 The gonum Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
@@ -90,6 +89,5 @@ func (t Time) Format(fs fmt.State, c rune) {
 		fmt.Fprint(fs, " s")
 	default:
 		fmt.Fprintf(fs, "%%!%c(%T=%g s)", c, t, float64(t))
-		return
 	}
 }