patch/delete: add delete sub-cmd

Implement the :patch delete command. Remove the project data from the
permanent store. If no argument is provided, the current project will be
deleted.

Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>

1 files changed, 45 insertions, 0 deletions

diff --git a/lib/pama/delete.go b/lib/pama/delete.go
new file mode 100644
index 00000000..18a93a27
--- /dev/null
+++ b/lib/pama/delete.go
@@ -0,0 +1,45 @@
+package pama
+
+import "fmt"
+
+// Delete removes provided project
+func (m PatchManager) Delete(name string) error {
+	store := m.store()
+	names, err := m.Names()
+	if err != nil {
+		return err
+	}
+
+	index := -1
+	for i, s := range names {
+		if s == name {
+			index = i
+			break
+		}
+	}
+	if index < 0 {
+		return fmt.Errorf("Project '%s' not found", name)
+	}
+
+	cur, err := m.CurrentProject()
+	if err == nil && cur.Name == name {
+		var next string
+		for _, s := range names {
+			if name != s {
+				next = s
+				break
+			}
+		}
+		err = store.SetCurrent(next)
+		if err != nil {
+			return storeErr(err)
+		}
+	}
+
+	return storeErr(m.store().DeleteProject(name))
+}
+
+func (m PatchManager) Names() ([]string, error) {
+	names, err := m.store().Names()
+	return names, storeErr(err)
+}