refac!: remove gno build command

Closes: gnolang#1242

In favor of `gno precompile --build`

gnovm/cmd/gno/main.go

@@ -33,7 +33,6 @@ func newGnocliCmd(io *commands.IO) *commands.Command {
 		newTestCmd(io),
 		newLintCmd(io),
 		newRunCmd(io),
-		newBuildCmd(io),
 		newPrecompileCmd(io),
 		newCleanCmd(io),
 		newReplCmd(),

gnovm/cmd/gno/precompile.go

@@ -18,6 +18,7 @@ type precompileCfg struct {
 	verbose     bool
 	skipFmt     bool
 	skipImports bool
+	gobuild     bool
 	goBinary    string
 	gofmtBinary string
 	output      string
@@ -85,6 +86,13 @@ func (c *precompileCfg) RegisterFlags(fs *flag.FlagSet) {
 		"do not precompile imports recursively",
 	)
 
+	fs.BoolVar(
+		&c.gobuild,
+		"gobuild",
+		false,
+		"run go build on generated go files, ignoring test files",
+	)
+
 	fs.StringVar(
 		&c.goBinary,
 		"go-binary",
@@ -125,7 +133,6 @@ func execPrecompile(cfg *precompileCfg, args []string, io *commands.IO) error {
 		if err != nil {
 			err = fmt.Errorf("%s: precompile: %w", filepath, err)
 			io.ErrPrintfln("%s", err.Error())
-
 			errCount++
 		}
 	}
@@ -134,6 +141,27 @@ func execPrecompile(cfg *precompileCfg, args []string, io *commands.IO) error {
 		return fmt.Errorf("%d precompile errors", errCount)
 	}
 
+	if cfg.gobuild {
+		paths, err := gnoPackagesFromArgs(args)
+		if err != nil {
+			return fmt.Errorf("list packages: %w", err)
+		}
+
+		errCount = 0
+		for _, pkgPath := range paths {
+			_ = pkgPath
+			err = goBuildFileOrPkg(pkgPath, cfg)
+			if err != nil {
+				err = fmt.Errorf("%s: build pkg: %w", pkgPath, err)
+				io.ErrPrintfln("%s\n", err.Error())
+				errCount++
+			}
+		}
+		if errCount > 0 {
+			return fmt.Errorf("%d build errors", errCount)
+		}
+	}
+
 	return nil
 }
 
@@ -219,3 +247,14 @@ func precompileFile(srcPath string, opts *precompileOptions) error {
 
 	return nil
 }
+
+func goBuildFileOrPkg(fileOrPkg string, cfg *precompileCfg) error {
+	verbose := cfg.verbose
+	goBinary := cfg.goBinary
+
+	if verbose {
+		fmt.Fprintf(os.Stderr, "%s\n", fileOrPkg)
+	}
+
+	return gno.PrecompileBuildPackage(fileOrPkg, goBinary)
+}

gnovm/cmd/gno/precompile_test.go

@@ -1,18 +1,11 @@
 package main
 
-import "testing"
+import (
+	"testing"
 
-func TestPrecompileApp(t *testing.T) {
-	tc := []testMainCase{
-		{
-			args:        []string{"precompile"},
-			errShouldBe: "flag: help requested",
-		},
+	"github.com/rogpeppe/go-internal/testscript"
+)
 
-		// {args: []string{"precompile", "..."}, stdoutShouldContain: "..."},
-		// TODO: recursive
-		// TODO: valid files
-		// TODO: invalid files
-	}
-	testMainCaseRun(t, tc)
+func TestPrecompile(t *testing.T) {
+	testscript.Run(t, setupTestScript(t, "testdata/gno_precompile"))
 }

gnovm/cmd/gno/test.go

@@ -210,9 +210,10 @@ func execTest(cfg *testCfg, args []string, io *commands.IO) error {
 			if verbose {
 				io.ErrPrintfln("=== PREC  %s", pkg.Dir)
 			}
-			precompileOpts := newPrecompileOptions(&precompileCfg{
+			precompileCfg := &precompileCfg{
 				output: tempdirRoot,
-			})
+			}
+			precompileOpts := newPrecompileOptions(precompileCfg)
 			err := precompilePkg(importPath(pkg.Dir), precompileOpts)
 			if err != nil {
 				io.ErrPrintln(err)
@@ -231,7 +232,7 @@ func execTest(cfg *testCfg, args []string, io *commands.IO) error {
 			if err != nil {
 				return errors.New("cannot resolve build dir")
 			}
-			err = goBuildFileOrPkg(tempDir, defaultBuildOptions)
+			err = goBuildFileOrPkg(tempDir, precompileCfg)
 			if err != nil {
 				io.ErrPrintln(err)
 				io.ErrPrintln("FAIL")

gnovm/cmd/gno/testdata/gno_precompile/01_no_args.txtar

@@ -0,0 +1,6 @@
+# Run gno precompile without args
+
+! gno precompile
+
+! stdout .+ 
+stderr 'flag: help requested'

gnovm/cmd/gno/testdata/gno_precompile/02_empty_dir.txtar

@@ -0,0 +1,6 @@
+# Run gno precompile on an empty dir
+
+gno precompile .
+
+! stdout .+
+! stderr .+