add man(1) generation

1 files changed, 50 insertions, 0 deletions

diff --git a/man/man.go b/man/man.go
new file mode 100644
index 0000000..49018ed
--- /dev/null
+++ b/man/man.go
@@ -0,0 +1,50 @@
+package main
+
+import (
+	"embed"
+	"github.com/ewy1/pik/spool"
+	"github.com/spf13/pflag"
+	"os"
+	"path/filepath"
+	"strings"
+	"text/template"
+)
+
+//go:embed templates
+var templates embed.FS
+
+var ManOutput = pflag.String(manFlagName, "out", "directory to write man pages to (gets created)")
+
+const manFlagName = "man-output"
+const templateDir = "templates"
+const manExtension = ".man"
+const templateExtension = ".tmpl"
+
+func main() {
+	pflag.Parse()
+	tmpl, err := template.ParseFS(templates, filepath.Join(templateDir, "*"))
+	if err != nil {
+		_, _ = spool.Panic(spool.ManFailure, "%v\n", err)
+		return
+	}
+	err = os.MkdirAll(*ManOutput, os.ModePerm)
+	if err != nil {
+		_, _ = spool.Panic(spool.ManFailure, "%v\n", err)
+	}
+	d := NewData()
+	for _, t := range tmpl.Templates() {
+		if !strings.HasSuffix(t.Name(), manExtension+templateExtension) {
+			continue
+		}
+
+		resultFile, err := os.OpenFile(filepath.Join(*ManOutput, strings.TrimSuffix(strings.TrimSuffix(t.Name(), templateExtension), manExtension)), os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0600)
+		if err != nil {
+			_, _ = spool.Panic(spool.ManFailure, "%v\n", err)
+		}
+
+		err = t.Execute(resultFile, d)
+		if err != nil {
+			_, _ = spool.Panic(spool.ManFailure, "%v\n", err)
+		}
+	}
+}