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a2ba162cda
Sometimes it is useful to get information of an object without having to download it completely. Add the "object-info" capability that lets the client ask for object-related information with their full hexadecimal object names. Only sizes are returned for now. Signed-off-by: Bruno Albuquerque <bga@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
113 lines
2.5 KiB
C
113 lines
2.5 KiB
C
#include "git-compat-util.h"
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#include "protocol-caps.h"
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#include "gettext.h"
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#include "pkt-line.h"
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#include "strvec.h"
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#include "hash.h"
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#include "object.h"
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#include "object-store.h"
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#include "string-list.h"
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#include "strbuf.h"
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struct requested_info {
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unsigned size : 1;
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};
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/*
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* Parses oids from the given line and collects them in the given
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* oid_str_list. Returns 1 if parsing was successful and 0 otherwise.
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*/
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static int parse_oid(const char *line, struct string_list *oid_str_list)
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{
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const char *arg;
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if (!skip_prefix(line, "oid ", &arg))
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return 0;
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string_list_append(oid_str_list, arg);
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return 1;
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}
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/*
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* Validates and send requested info back to the client. Any errors detected
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* are returned as they are detected.
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*/
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static void send_info(struct repository *r, struct packet_writer *writer,
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struct string_list *oid_str_list,
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struct requested_info *info)
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{
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struct string_list_item *item;
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struct strbuf send_buffer = STRBUF_INIT;
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if (!oid_str_list->nr)
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return;
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if (info->size)
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packet_writer_write(writer, "size");
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for_each_string_list_item (item, oid_str_list) {
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const char *oid_str = item->string;
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struct object_id oid;
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unsigned long object_size;
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if (get_oid_hex(oid_str, &oid) < 0) {
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packet_writer_error(
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writer,
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"object-info: protocol error, expected to get oid, not '%s'",
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oid_str);
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continue;
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}
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strbuf_addstr(&send_buffer, oid_str);
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if (info->size) {
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if (oid_object_info(r, &oid, &object_size) < 0) {
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strbuf_addstr(&send_buffer, " ");
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} else {
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strbuf_addf(&send_buffer, " %lu", object_size);
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}
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}
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packet_writer_write(writer, "%s",
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strbuf_detach(&send_buffer, NULL));
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}
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}
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int cap_object_info(struct repository *r, struct strvec *keys,
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struct packet_reader *request)
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{
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struct requested_info info;
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struct packet_writer writer;
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struct string_list oid_str_list = STRING_LIST_INIT_DUP;
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packet_writer_init(&writer, 1);
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while (packet_reader_read(request) == PACKET_READ_NORMAL) {
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if (!strcmp("size", request->line)) {
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info.size = 1;
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continue;
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}
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if (parse_oid(request->line, &oid_str_list))
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continue;
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packet_writer_error(&writer,
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"object-info: unexpected line: '%s'",
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request->line);
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}
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if (request->status != PACKET_READ_FLUSH) {
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packet_writer_error(
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&writer, "object-info: expected flush after arguments");
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die(_("object-info: expected flush after arguments"));
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}
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send_info(r, &writer, &oid_str_list, &info);
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string_list_clear(&oid_str_list, 1);
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packet_flush(1);
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return 0;
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}
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