Go rewrite: loadbars with mage, default localhost, NOTICE

- Module codeberg.org/snonux/loadbars, Go 1.25
- cmd/loadbars, internal/{app,config,collector,display,stats,constants,version}
- SDL display, shell script for remote (no Perl), config/cluster support
- Magefile: build, test, install, uninstall/deinstall
- NOTICE for go-sdl2 attribution (BSD-3-Clause)
- Default to localhost when no hosts given (no SSH)
- Remove loadbars-go binary name; build as loadbars

Co-authored-by: Cursor <cursoragent@cursor.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/Magefile.go b/Magefile.go
new file mode 100644
index 0000000..119f0b8
--- /dev/null
+++ b/Magefile.go
@@ -0,0 +1,96 @@
+//go:build mage
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/magefile/mage/mg"
+	"github.com/magefile/mage/sh"
+)
+
+const (
+	binaryName = "loadbars"
+	shareName  = "loadbars"
+)
+
+// Default sets the default target (build).
+func Default() { mg.Deps(Build) }
+
+// Build compiles the loadbars binary.
+func Build() error {
+	return sh.RunV("go", "build", "-o", binaryName, "./cmd/loadbars")
+}
+
+// Test runs the test suite.
+func Test() error {
+	return sh.RunV("go", "test", "./...")
+}
+
+// Install builds and installs the binary, script, and NOTICE under DESTDIR.
+// Usage: DESTDIR=/tmp/install mage install  (or  mage install  for DESTDIR empty)
+func Install() error {
+	mg.Deps(Build)
+	dest := getDestDir()
+	binDir := filepath.Join(dest, "usr", "bin")
+	shareDir := filepath.Join(dest, "usr", "share", shareName)
+	scriptsDir := filepath.Join(shareDir, "scripts")
+	if err := os.MkdirAll(binDir, 0755); err != nil {
+		return fmt.Errorf("mkdir %s: %w", binDir, err)
+	}
+	if err := os.MkdirAll(scriptsDir, 0755); err != nil {
+		return fmt.Errorf("mkdir %s: %w", scriptsDir, err)
+	}
+	if err := sh.Copy(filepath.Join(binDir, binaryName), binaryName); err != nil {
+		return fmt.Errorf("copy binary: %w", err)
+	}
+	if err := sh.Copy(filepath.Join(scriptsDir, "loadbars-remote.sh"), "scripts/loadbars-remote.sh"); err != nil {
+		return fmt.Errorf("copy script: %w", err)
+	}
+	if err := sh.Copy(filepath.Join(shareDir, "NOTICE"), "NOTICE"); err != nil {
+		return fmt.Errorf("copy NOTICE: %w", err)
+	}
+	fmt.Printf("Installed to %s (binary: %s/usr/bin/%s)\n", dest, dest, binaryName)
+	return nil
+}
+
+// Uninstall removes files installed by Install from DESTDIR.
+func Uninstall() error {
+	return deinstall()
+}
+
+// Deinstall is an alias for Uninstall.
+func Deinstall() error {
+	return deinstall()
+}
+
+func deinstall() error {
+	dest := getDestDir()
+	if dest == "" {
+		return fmt.Errorf("DESTDIR must be set to uninstall (e.g. DESTDIR=/tmp/install mage uninstall)")
+	}
+	paths := []string{
+		filepath.Join(dest, "usr", "bin", binaryName),
+		filepath.Join(dest, "usr", "share", shareName, "scripts", "loadbars-remote.sh"),
+		filepath.Join(dest, "usr", "share", shareName, "NOTICE"),
+	}
+	for _, p := range paths {
+		if err := os.Remove(p); err != nil && !os.IsNotExist(err) {
+			return fmt.Errorf("remove %s: %w", p, err)
+		}
+	}
+	// Remove empty dirs
+	_ = os.Remove(filepath.Join(dest, "usr", "share", shareName, "scripts"))
+	_ = os.Remove(filepath.Join(dest, "usr", "share", shareName))
+	fmt.Printf("Uninstalled from %s\n", dest)
+	return nil
+}
+
+func getDestDir() string {
+	if d := os.Getenv("DESTDIR"); d != "" {
+		return filepath.Clean(d)
+	}
+	return ""
+}