Switch UI to bubbletea (#1888)

* add bubbletea UI

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* swap pipeline to go 1.20.x and add attest guard for cosign binary

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* update note in developing.md about the required golang version

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* fix merge conflict for windows path handling

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* temp test for attest handler

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* add addtional test iterations for background reader

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

---------

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

cmd/syft/cli/ui/util_test.go

@@ -0,0 +1,62 @@
+package ui
+
+import (
+	"reflect"
+	"testing"
+	"unsafe"
+
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+func runModel(t testing.TB, m tea.Model, iterations int, message tea.Msg) string {
+	t.Helper()
+	if iterations == 0 {
+		iterations = 1
+	}
+	m.Init()
+	var cmd tea.Cmd = func() tea.Msg {
+		return message
+	}
+
+	for i := 0; cmd != nil && i < iterations; i++ {
+		msgs := flatten(cmd())
+		var nextCmds []tea.Cmd
+		var next tea.Cmd
+		for _, msg := range msgs {
+			t.Logf("Message: %+v %+v\n", reflect.TypeOf(msg), msg)
+			m, next = m.Update(msg)
+			nextCmds = append(nextCmds, next)
+		}
+		cmd = tea.Batch(nextCmds...)
+	}
+	return m.View()
+}
+
+func flatten(p tea.Msg) (msgs []tea.Msg) {
+	if reflect.TypeOf(p).Name() == "batchMsg" {
+		partials := extractBatchMessages(p)
+		for _, m := range partials {
+			msgs = append(msgs, flatten(m)...)
+		}
+	} else {
+		msgs = []tea.Msg{p}
+	}
+	return msgs
+}
+
+func extractBatchMessages(m tea.Msg) (ret []tea.Msg) {
+	sliceMsgType := reflect.SliceOf(reflect.TypeOf(tea.Cmd(nil)))
+	value := reflect.ValueOf(m) // note: this is technically unaddressable
+
+	// make our own instance that is addressable
+	valueCopy := reflect.New(value.Type()).Elem()
+	valueCopy.Set(value)
+
+	cmds := reflect.NewAt(sliceMsgType, unsafe.Pointer(valueCopy.UnsafeAddr())).Elem()
+	for i := 0; i < cmds.Len(); i++ {
+		item := cmds.Index(i)
+		r := item.Call(nil)
+		ret = append(ret, r[0].Interface().(tea.Msg))
+	}
+	return ret
+}