[PATCH v4 8/8] evolve: add the git change list command

[sxenos]

From: Stefan Xenos <sxe...@google.com>

This command lists the ongoing changes from the refs/metas
namespace.

Signed-off-by: Stefan Xenos <sxe...@google.com>
---
 builtin/change.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/builtin/change.c b/builtin/change.c
index 06cbb50679..33a5983bc7 100644
--- a/builtin/change.c
+++ b/builtin/change.c
@@ -5,15 +5,64 @@
 #include "config.h"
 
 static const char * const builtin_change_usage[] = {
+       N_("git change list [<pattern>...]"),
        N_("git change update [--force] [--replace <treeish>...] [--origin 
<treesih>...] [--content <newtreeish>]"),
        NULL
 };
 
+static const char * const builtin_list_usage[] = {
+       N_("git change list [<pattern>...]"),
+       NULL
+};
+
 static const char * const builtin_update_usage[] = {
        N_("git change update [--force] [--replace <treeish>...] [--origin 
<treesih>...] [--content <newtreeish>]"),
        NULL
 };
 
+static int change_list(int argc, const char **argv, const char* prefix)
+{
+       struct option options[] = {
+               OPT_END()
+       };
+       struct ref_filter filter;
+       /* TODO: Sorting temporarily disabled. See comments, below.
+        * struct ref_sorting *sorting = ref_default_sorting(); */
+       struct ref_format format = REF_FORMAT_INIT;
+       struct ref_array array;
+       int i;
+
+       argc = parse_options(argc, argv, prefix, options, builtin_list_usage, 
0);
+
+       setup_ref_filter_porcelain_msg();
+
+       memset(&filter, 0, sizeof(filter));
+       memset(&array, 0, sizeof(array));
+
+       filter.kind = FILTER_REFS_CHANGES;
+       filter.name_patterns = argv;
+
+       filter_refs(&array, &filter, FILTER_REFS_CHANGES);
+
+       /* TODO: This causes a crash. It sets one of the atom_value handlers to
+        * something invalid, which causes a crash later when we call
+        * show_ref_array_item. Figure out why this happens and put back the 
sorting.
+        *ref_array_sort(sorting, &array); */
+
+       if (!format.format)
+               format.format = "%(refname:lstrip=1)";
+
+       if (verify_ref_format(&format))
+               die(_("unable to parse format string"));
+
+       for (i = 0; i < array.nr; i++)
+               show_ref_array_item(array.items[i], &format);
+
+       ref_array_clear(&array);
+
+       return 0;
+}
+
 struct update_state {
        int options;
        const char* change;
@@ -164,6 +213,8 @@ int cmd_change(int argc, const char **argv, const char 
*prefix)
 
        if (argc < 1)
                usage_with_options(builtin_change_usage, options);
+       else if (!strcmp(argv[0], "list"))
+               result = change_list(argc, argv, prefix);
        else if (!strcmp(argv[0], "update"))
                result = change_update(argc, argv, prefix);
        else {
-- 
2.20.1.611.gfbb209baf1-goog