commands: add a command to export bugs as raw operations (NDJSON)

1 files changed, 92 insertions, 0 deletions

diff --git a/commands/export.go b/commands/export.go
new file mode 100644
index 00000000..8a770fc1
--- /dev/null
+++ b/commands/export.go
@@ -0,0 +1,92 @@
+package commands
+
+import (
+	"encoding/json"
+
+	"github.com/spf13/cobra"
+
+	"github.com/MichaelMure/git-bug/bug"
+	"github.com/MichaelMure/git-bug/entity"
+)
+
+type exportOptions struct {
+	queryOptions
+}
+
+func newExportCommand() *cobra.Command {
+	env := newEnv()
+	options := exportOptions{}
+
+	cmd := &cobra.Command{
+		Use:   "export [QUERY]",
+		Short: "Export bugs as a series of operations.",
+		Long: `Export bugs as a series of operations.
+
+The output format is NDJSON (Newline delimited JSON).
+
+You can pass an additional query to filter and order the list. This query can be expressed either with a simple query language, flags, a natural language full text search, or a combination of the aforementioned.`,
+		Example:  `See ls`,
+		PreRunE:  loadBackend(env),
+		PostRunE: closeBackend(env),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return runExport(env, options, args)
+		},
+	}
+
+	flags := cmd.Flags()
+	flags.SortFlags = false
+
+	flags.StringSliceVarP(&options.statusQuery, "status", "s", nil,
+		"Filter by status. Valid values are [open,closed]")
+	flags.StringSliceVarP(&options.authorQuery, "author", "a", nil,
+		"Filter by author")
+	flags.StringSliceVarP(&options.participantQuery, "participant", "p", nil,
+		"Filter by participant")
+	flags.StringSliceVarP(&options.actorQuery, "actor", "A", nil,
+		"Filter by actor")
+	flags.StringSliceVarP(&options.labelQuery, "label", "l", nil,
+		"Filter by label")
+	flags.StringSliceVarP(&options.titleQuery, "title", "t", nil,
+		"Filter by title")
+	flags.StringSliceVarP(&options.noQuery, "no", "n", nil,
+		"Filter by absence of something. Valid values are [label]")
+	flags.StringVarP(&options.sortBy, "by", "b", "creation",
+		"Sort the results by a characteristic. Valid values are [id,creation,edit]")
+	flags.StringVarP(&options.sortDirection, "direction", "d", "asc",
+		"Select the sorting direction. Valid values are [asc,desc]")
+
+	return cmd
+}
+
+func runExport(env *Env, opts exportOptions, args []string) error {
+	q, err := makeQuery(args, &opts.queryOptions)
+	if err != nil {
+		return err
+	}
+
+	allIds := env.backend.QueryBugs(q)
+
+	out := json.NewEncoder(env.out)
+
+	for _, id := range allIds {
+		b, err := env.backend.ResolveBug(id)
+		if err != nil {
+			return err
+		}
+
+		wrapper := struct {
+			Id         entity.Id       `json:"id"`
+			Operations []bug.Operation `json:"operations"`
+		}{
+			Id:         id,
+			Operations: b.Snapshot().Operations,
+		}
+
+		err = out.Encode(wrapper)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}