rework program flow

This commit is a complete rebuild of pkictl. Before everything was all
over the place and adding new commands was kind of a hassle.

Now each command has its own file and can be adjusted on a command
basis. Options are still used by the same name, but can now use
different descriptions.

1 files changed, 26 insertions, 0 deletions

diff --git a/create_public_key.go b/create_public_key.go
new file mode 100644
index 0000000..93c0677
--- /dev/null
+++ b/create_public_key.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	"flag"
+)
+
+func CreatePublicKey(args []string) error {
+	fs := flag.NewFlagSet("pkictl create-public-key", flag.ExitOnError)
+	flagPrivate := fs.String("private-key", "", "path to the private key or read from stdin")
+	flagOutput := fs.String("output", "stdout", "write private key to file")
+	fs.Parse(args)
+
+	pk, err := loadPrivateKey(*flagPrivate)
+	if err != nil {
+		return err
+	}
+
+	out, err := openOutput(*flagOutput)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	pub := pk.Public()
+	return writePem(pub, out)
+}