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/* notmuch - Not much of an email program, (just index and search)
 *
 * Copyright © 2009 Carl Worth
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see https://www.gnu.org/licenses/ .
 *
 * Author: Carl Worth <cworth@cworth.org>
 */

#include "notmuch-client.h"
#include "sprinter.h"
#include "string-util.h"

typedef enum {
    /* Search command */
    OUTPUT_SUMMARY	= 1 << 0,
    OUTPUT_THREADS	= 1 << 1,
    OUTPUT_MESSAGES	= 1 << 2,
    OUTPUT_FILES	= 1 << 3,
    OUTPUT_TAGS		= 1 << 4,

    /* Address command */
    OUTPUT_SENDER	= 1 << 5,
    OUTPUT_RECIPIENTS	= 1 << 6,
    OUTPUT_COUNT	= 1 << 7,
    OUTPUT_ADDRESS	= 1 << 8,
} output_t;

typedef enum {
    DEDUP_NONE,
    DEDUP_MAILBOX,
    DEDUP_ADDRESS,
} dedup_t;

typedef enum {
    NOTMUCH_FORMAT_JSON,
    NOTMUCH_FORMAT_TEXT,
    NOTMUCH_FORMAT_TEXT0,
    NOTMUCH_FORMAT_SEXP
} format_sel_t;

typedef struct {
    notmuch_database_t *notmuch;
    void *talloc_ctx;
    int format_sel;
    sprinter_t *format;
    int exclude;
    int query_syntax;
    notmuch_query_t *query;
    int sort;
    int output;
    int offset;
    int limit;
    int dupe;
    GHashTable *addresses;
    int dedup;
} search_context_t;

typedef struct {
    const char *name;
    const char *addr;
    int count;
} mailbox_t;

/* Return two stable query strings that identify exactly the matched
 * and unmatched messages currently in thread.  If there are no
 * matched or unmatched messages, the returned buffers will be
 * NULL. */
static int
get_thread_query (notmuch_thread_t *thread,
		  char **matched_out, char **unmatched_out)
{
    notmuch_messages_t *messages;
    char *escaped = NULL;
    size_t escaped_len = 0;

    *matched_out = *unmatched_out = NULL;

    for (messages = notmuch_thread_get_messages (thread);
	 notmuch_messages_valid (messages);
	 notmuch_messages_move_to_next (messages)) {
	notmuch_message_t *message = notmuch_messages_get (messages);
	const char *mid = notmuch_message_get_message_id (message);
	notmuch_bool_t is_set;
	char **buf;

	if (notmuch_message_get_flag_st (message, NOTMUCH_MESSAGE_FLAG_MATCH, &is_set))
	    return -1;
	/* Determine which query buffer to extend */
	buf = is_set ? matched_out : unmatched_out;
	/* Add this message's id: query.  Since "id" is an exclusive
	 * prefix, it is implicitly 'or'd together, so we only need to
	 * join queries with a space. */
	if (make_boolean_term (thread, "id", mid, &escaped, &escaped_len) < 0)
	    return -1;
	if (*buf)
	    *buf = talloc_asprintf_append_buffer (*buf, " %s", escaped);
	else
	    *buf = talloc_strdup (thread, escaped);
	if (! *buf)
	    return -1;
    }
    talloc_free (escaped);
    return 0;
}

static int
do_search_threads (search_context_t *ctx)
{
    notmuch_thread_t *thread;
    notmuch_threads_t *threads;
    notmuch_tags_t *tags;
    sprinter_t *format = ctx->format;
    time_t date;
    int i;
    notmuch_status_t status;

    if (ctx->offset < 0) {
	unsigned count;
	notmuch_status_t status;
	status = notmuch_query_count_threads (ctx->query, &count);
	if (print_status_query ("notmuch search", ctx->query, status))
	    return 1;

	ctx->offset += count;
	if (ctx->offset < 0)
	    ctx->offset = 0;
    }

    status = notmuch_query_search_threads (ctx->query, &threads);
    if (print_status_query ("notmuch search", ctx->query, status))
	return 1;

    format->begin_list (format);

    for (i = 0;
	 notmuch_threads_valid (threads) && (ctx->limit < 0 || i < ctx->offset + ctx->limit);
	 notmuch_threads_move_to_next (threads), i++) {
	thread = notmuch_threads_get (threads);

	if (i < ctx->offset) {
	    notmuch_thread_destroy (thread);
	    continue;
	}

	if (ctx->output == OUTPUT_THREADS) {
	    format->set_prefix (format, "thread");
	    format->string (format,
			    notmuch_thread_get_thread_id (thread));
	    format->separator (format);
	} else { /* output == OUTPUT_SUMMARY */
	    void *ctx_quote = talloc_new (thread);
	    const char *authors = notmuch_thread_get_authors (thread);
	    const char *subject = notmuch_thread_get_subject (thread);
	    const char *thread_id = notmuch_thread_get_thread_id (thread);
	    int matched = notmuch_thread_get_matched_messages (thread);
	    int files = notmuch_thread_get_total_files (thread);
	    int total = notmuch_thread_get_total_messages (thread);
	    const char *relative_date = NULL;
	    bool first_tag = true;

	    format->begin_map (format);

	    if (ctx->sort == NOTMUCH_SORT_OLDEST_FIRST)
		date = notmuch_thread_get_oldest_date (thread);
	    else
		date = notmuch_thread_get_newest_date (thread);

	    relative_date = notmuch_time_relative_date (ctx_quote, date);

	    if (format->is_text_printer) {
		/* Special case for the text formatter */
		printf ("thread:%s %12s ",
			thread_id,
			relative_date);
		if (total == files)
		    printf ("[%d/%d] %s; %s (",
			    matched,
			    total,
			    sanitize_string (ctx_quote, authors),
			    sanitize_string (ctx_quote, subject));
		else
		    printf ("[%d/%d(%d)] %s; %s (",
			    matched,
			    total,
			    files,
			    sanitize_string (ctx_quote, authors),
			    sanitize_string (ctx_quote, subject));

	    } else { /* Structured Output */
		format->map_key (format, "thread");
		format->string (format, thread_id);
		format->map_key (format, "timestamp");
		format->integer (format, date);
		format->map_key (format, "date_relative");
		format->string (format, relative_date);
		format->map_key (format, "matched");
		format->integer (format, matched);
		format->map_key (format, "total");
		format->integer (format, total);
		format->map_key (format, "authors");
		format->string (format, authors);
		format->map_key (format, "subject");
		format->string (format, subject);
		if (notmuch_format_version >= 2) {
		    char *matched_query, *unmatched_query;
		    if (get_thread_query (thread, &matched_query,
					  &unmatched_query) < 0) {
			fprintf (stderr, "Out of memory\n");
			return 1;
		    }
		    format->map_key (format, "query");
		    format->begin_list (format);
		    if (matched_query)
			format->string (format, matched_query);
		    else
			format->null (format);
		    if (unmatched_query)
			format->string (format, unmatched_query);
		    else
			format->null (format);
		    format->end (format);
		}
	    }

	    talloc_free (ctx_quote);

	    format->map_key (format, "tags");
	    format->begin_list (format);

	    for (tags = notmuch_thread_get_tags (thread);
		 notmuch_tags_valid (tags);
		 notmuch_tags_move_to_next (tags)) {
		const char *tag = notmuch_tags_get (tags);

		if (format->is_text_printer) {
		    /* Special case for the text formatter */
		    if (first_tag)
			first_tag = false;
		    else
			fputc (' ', stdout);
		    fputs (tag, stdout);
		} else { /* Structured Output */
		    format->string (format, tag);
		}
	    }

	    if (format->is_text_printer)
		printf (")");

	    format->end (format);
	    format->end (format);
	    format->separator (format);
	}

	notmuch_thread_destroy (thread);
    }

    format->end (format);

    return 0;
}

static mailbox_t *
new_mailbox (void *ctx, const char *name, const char *addr)
{
    mailbox_t *mailbox;

    mailbox = talloc (ctx, mailbox_t);
    if (! mailbox)
	return NULL;

    mailbox->name = talloc_strdup (mailbox, name);
    mailbox->addr = talloc_strdup (mailbox, addr);
    mailbox->count = 1;

    return mailbox;
}

static int
mailbox_compare (const void *v1, const void *v2)
{
    const mailbox_t *m1 = v1, *m2 = v2;
    int ret;

    ret = strcmp_null (m1->name, m2->name);
    if (! ret)
	ret = strcmp (m1->addr, m2->addr);

    return ret;
}

/* Returns true iff name and addr is duplicate. If not, stores the
 * name/addr pair in order to detect subsequent duplicates. */
static bool
is_duplicate (const search_context_t *ctx, const char *name, const char *addr)
{
    char *key;
    GList *list, *l;
    mailbox_t *mailbox;

    list = g_hash_table_lookup (ctx->addresses, addr);
    if (list) {
	mailbox_t find = {
	    .name = name,
	    .addr = addr,
	};

	l = g_list_find_custom (list, &find, mailbox_compare);
	if (l) {
	    mailbox = l->data;
	    mailbox->count++;
	    return true;
	}

	mailbox = new_mailbox (ctx->format, name, addr);
	if (! mailbox)
	    return false;

	/*
	 * XXX: It would be more efficient to prepend to the list, but
	 * then we'd have to store the changed list head back to the
	 * hash table. This check is here just to avoid the compiler
	 * warning for unused result.
	 */
	if (list != g_list_append (list, mailbox))
	    INTERNAL_ERROR ("appending to list changed list head\n");

	return false;
    }

    key = talloc_strdup (ctx->format, addr);
    if (! key)
	return false;

    mailbox = new_mailbox (ctx->format, name, addr);
    if (! mailbox)
	return false;

    list = g_list_append (NULL, mailbox);
    if (! list)
	return false;

    g_hash_table_insert (ctx->addresses, key, list);

    return false;
}

static void
print_mailbox (const search_context_t *ctx, const mailbox_t *mailbox)
{
    const char *name = mailbox->name;
    const char *addr = mailbox->addr;
    int count = mailbox->count;
    sprinter_t *format = ctx->format;
    InternetAddress *ia = internet_address_mailbox_new (name, addr);
    char *name_addr;

    /* name_addr has the name part quoted if necessary. Compare
     * 'John Doe <john@doe.com>' vs. '"Doe, John" <john@doe.com>' */
    name_addr = internet_address_to_string (ia, NULL, false);

    if (format->is_text_printer) {
	if (ctx->output & OUTPUT_COUNT) {
	    format->integer (format, count);
	    format->string (format, "\t");
	}
	if (ctx->output & OUTPUT_ADDRESS)
	    format->string (format, addr);
	else
	    format->string (format, name_addr);
	format->separator (format);
    } else {
	format->begin_map (format);
	format->map_key (format, "name");
	format->string (format, name);
	format->map_key (format, "address");
	format->string (format, addr);
	format->map_key (format, "name-addr");
	format->string (format, name_addr);
	if (ctx->output & OUTPUT_COUNT) {
	    format->map_key (format, "count");
	    format->integer (format, count);
	}
	format->end (format);
	format->separator (format);
    }

    g_object_unref (ia);
    g_free (name_addr);
}

/* Print or prepare for printing addresses from InternetAddressList. */
static void
process_address_list (const search_context_t *ctx,
		      InternetAddressList *list)
{
    InternetAddress *address;
    int i;

    for (i = 0; i < internet_address_list_length (list); i++) {
	address = internet_address_list_get_address (list, i);
	if (INTERNET_ADDRESS_IS_GROUP (address)) {
	    InternetAddressGroup *group;
	    InternetAddressList *group_list;

	    group = INTERNET_ADDRESS_GROUP (address);
	    group_list = internet_address_group_get_members (group);
	    if (group_list == NULL)
		continue;

	    process_address_list (ctx, group_list);
	} else {
	    InternetAddressMailbox *mailbox = INTERNET_ADDRESS_MAILBOX (address);
	    mailbox_t mbx = {
		.name = internet_address_get_name (address),
		.addr = internet_address_mailbox_get_addr (mailbox),
	    };

	    /* OUTPUT_COUNT only works with deduplication */
	    if (ctx->dedup != DEDUP_NONE &&
		is_duplicate (ctx, mbx.name, mbx.addr))
		continue;

	    /* OUTPUT_COUNT and DEDUP_ADDRESS require a full pass. */
	    if (ctx->output & OUTPUT_COUNT || ctx->dedup == DEDUP_ADDRESS)
		continue;

	    print_mailbox (ctx, &mbx);
	}
    }
}

/* Print or prepare for printing addresses from a message header. */
static void
process_address_header (const search_context_t *ctx, const char *value)
{
    InternetAddressList *list;

    if (value == NULL)
	return;

    list = internet_address_list_parse (NULL, value);
    if (list == NULL)
	return;

    process_address_list (ctx, list);

    g_object_unref (list);
}

/* Destructor for talloc-allocated GHashTable keys and values. */
static void
_talloc_free_for_g_hash (void *ptr)
{
    talloc_free (ptr);
}

static void
_list_free_for_g_hash (void *ptr)
{
    g_list_free_full (ptr, _talloc_free_for_g_hash);
}

/* Find the most common variant of a list of unique mailboxes, and
 * conflate the counts. */
static mailbox_t *
summarize_mailboxes (GList *list)
{
    GList *l;
    mailbox_t *mailbox = NULL, *m;
    int max = 0;
    int total = 0;

    for (l = list; l; l = l->next) {
	m = l->data;
	total += m->count;
	if (m->count > max) {
	    mailbox = m;
	    max = m->count;
	}
    }

    if (! mailbox)
	INTERNAL_ERROR ("Empty list in address hash table\n");

    /* The original count is no longer needed, so overwrite. */
    mailbox->count = total;

    return mailbox;
}

static void
print_list_value (void *mailbox, void *context)
{
    print_mailbox (context, mailbox);
}

static void
print_hash_value (unused (void *key), void *list, void *context)
{
    const search_context_t *ctx = context;

    if (ctx->dedup == DEDUP_ADDRESS) {
	mailbox_t *mailbox = summarize_mailboxes (list);
	print_mailbox (ctx, mailbox);
    } else
	g_list_foreach (list, print_list_value, context);
}

static int
_count_filenames (notmuch_message_t *message)
{
    notmuch_filenames_t *filenames;
    int i = 0;

    filenames = notmuch_message_get_filenames (message);

    while (notmuch_filenames_valid (filenames)) {
	notmuch_filenames_move_to_next (filenames);
	i++;
    }

    notmuch_filenames_destroy (filenames);

    return i;
}

static int
do_search_messages (search_context_t *ctx)
{
    notmuch_message_t *message;
    notmuch_messages_t *messages;
    notmuch_filenames_t *filenames;
    sprinter_t *format = ctx->format;
    int i;
    notmuch_status_t status;

    if (ctx->offset < 0) {
	unsigned count;
	notmuch_status_t status;
	status = notmuch_query_count_messages (ctx->query, &count);
	if (print_status_query ("notmuch search", ctx->query, status))
	    return 1;

	ctx->offset += count;
	if (ctx->offset < 0)
	    ctx->offset = 0;
    }

    status = notmuch_query_search_messages (ctx->query, &messages);
    if (print_status_query ("notmuch search", ctx->query, status))
	return 1;

    format->begin_list (format);

    for (i = 0;
	 notmuch_messages_valid (messages) && (ctx->limit < 0 || i < ctx->offset + ctx->limit);
	 notmuch_messages_move_to_next (messages), i++) {
	if (i < ctx->offset)
	    continue;

	message = notmuch_messages_get (messages);

	if (ctx->output == OUTPUT_FILES) {
	    int j;
	    filenames = notmuch_message_get_filenames (message);

	    for (j = 1;
		 notmuch_filenames_valid (filenames);
		 notmuch_filenames_move_to_next (filenames), j++) {
		if (ctx->dupe < 0 || ctx->dupe == j) {
		    format->string (format, notmuch_filenames_get (filenames));
		    format->separator (format);
		}
	    }

	    notmuch_filenames_destroy ( filenames );

	} else if (ctx->output == OUTPUT_MESSAGES) {
	    /* special case 1 for speed */
	    if (ctx->dupe <= 1 || ctx->dupe <= _count_filenames (message)) {
		format->set_prefix (format, "id");
		format->string (format,
				notmuch_message_get_message_id (message));
		format->separator (format);
	    }
	} else {
	    if (ctx->output & OUTPUT_SENDER) {
		const char *addrs;

		addrs = notmuch_message_get_header (message, "from");
		process_address_header (ctx, addrs);
	    }

	    if (ctx->output & OUTPUT_RECIPIENTS) {
		const char *hdrs[] = { "to", "cc", "bcc" };
		const char *addrs;
		size_t j;

		for (j = 0; j < ARRAY_SIZE (hdrs); j++) {
		    addrs = notmuch_message_get_header (message, hdrs[j]);
		    process_address_header (ctx, addrs);
		}
	    }
	}

	notmuch_message_destroy (message);
    }

    if (ctx->addresses &&
	(ctx->output & OUTPUT_COUNT || ctx->dedup == DEDUP_ADDRESS)) {
	g_hash_table_foreach (ctx->addresses, print_hash_value, ctx);
    }
    notmuch_messages_destroy (messages);

    format->end (format);

    return 0;
}

static int
do_search_tags (const search_context_t *ctx)
{
    notmuch_messages_t *messages = NULL;
    notmuch_tags_t *tags;
    const char *tag;
    sprinter_t *format = ctx->format;
    notmuch_query_t *query = ctx->query;
    notmuch_database_t *notmuch = ctx->notmuch;

    /* should the following only special case if no excluded terms
     * specified? */

    /* Special-case query of "*" for better performance. */
    if (strcmp (notmuch_query_get_query_string (query), "*") == 0) {
	tags = notmuch_database_get_all_tags (notmuch);
    } else {
	notmuch_status_t status;
	status = notmuch_query_search_messages (query, &messages);
	if (print_status_query ("notmuch search", query, status))
	    return 1;

	tags = notmuch_messages_collect_tags (messages);
    }
    if (tags == NULL)
	return 1;

    format->begin_list (format);

    for (;
	 notmuch_tags_valid (tags);
	 notmuch_tags_move_to_next (tags)) {
	tag = notmuch_tags_get (tags);

	format->string (format, tag);
	format->separator (format);

    }

    notmuch_tags_destroy (tags);

    if (messages)
	notmuch_messages_destroy (messages);

    format->end (format);

    return 0;
}

static int
_notmuch_search_prepare (search_context_t *ctx, int argc, char *argv[])
{
    char *query_str;

    if (! ctx->talloc_ctx)
	ctx->talloc_ctx = talloc_new (NULL);

    switch (ctx->format_sel) {
    case NOTMUCH_FORMAT_TEXT:
	ctx->format = sprinter_text_create (ctx->talloc_ctx, stdout);
	break;
    case NOTMUCH_FORMAT_TEXT0:
	if (ctx->output == OUTPUT_SUMMARY) {
	    fprintf (stderr, "Error: --format=text0 is not compatible with --output=summary.\n");
	    return EXIT_FAILURE;
	}
	ctx->format = sprinter_text0_create (ctx->talloc_ctx, stdout);
	break;
    case NOTMUCH_FORMAT_JSON:
	ctx->format = sprinter_json_create (ctx->talloc_ctx, stdout);
	break;
    case NOTMUCH_FORMAT_SEXP:
	ctx->format = sprinter_sexp_create (ctx->talloc_ctx, stdout);
	break;
    default:
	/* this should never happen */
	INTERNAL_ERROR ("no output format selected");
    }

    notmuch_exit_if_unsupported_format ();

    query_str = query_string_from_args (ctx->notmuch, argc, argv);
    if (query_str == NULL) {
	fprintf (stderr, "Out of memory.\n");
	return EXIT_FAILURE;
    }
    if (*query_str == '\0') {
	fprintf (stderr, "Error: notmuch search requires at least one search term.\n");
	return EXIT_FAILURE;
    }

    if (print_status_database ("notmuch search", ctx->notmuch,
			       notmuch_query_create_with_syntax (ctx->notmuch, query_str,
								 shared_option_query_syntax (),
								 &ctx->query)))
	return EXIT_FAILURE;

    notmuch_query_set_sort (ctx->query, ctx->sort);

    if (ctx->exclude == NOTMUCH_EXCLUDE_FLAG && ctx->output != OUTPUT_SUMMARY) {
	/* If we are not doing summary output there is nowhere to
	 * print the excluded flag so fall back on including the
	 * excluded messages. */
	fprintf (stderr, "Warning: this output format cannot flag excluded messages.\n");
	ctx->exclude = NOTMUCH_EXCLUDE_FALSE;
    }

    if (ctx->exclude != NOTMUCH_EXCLUDE_FALSE) {
	notmuch_config_values_t *exclude_tags;
	notmuch_status_t status;

	for (exclude_tags = notmuch_config_get_values (ctx->notmuch, NOTMUCH_CONFIG_EXCLUDE_TAGS);
	     notmuch_config_values_valid (exclude_tags);
	     notmuch_config_values_move_to_next (exclude_tags)) {

	    status = notmuch_query_add_tag_exclude (ctx->query,
						    notmuch_config_values_get (exclude_tags));
	    if (status && status != NOTMUCH_STATUS_IGNORED) {
		print_status_query ("notmuch search", ctx->query, status);
		return EXIT_FAILURE;
	    }
	}
	notmuch_query_set_omit_excluded (ctx->query, ctx->exclude);
    }

    return 0;
}

static void
_notmuch_search_cleanup (search_context_t *ctx)
{
    notmuch_query_destroy (ctx->query);
    notmuch_database_destroy (ctx->notmuch);

    talloc_free (ctx->format);
}

static search_context_t search_context = {
    .format_sel = NOTMUCH_FORMAT_TEXT,
    .exclude = NOTMUCH_EXCLUDE_TRUE,
    .sort = NOTMUCH_SORT_NEWEST_FIRST,
    .query_syntax = NOTMUCH_QUERY_SYNTAX_XAPIAN,
    .output = 0,
    .offset = 0,
    .limit = -1, /* unlimited */
    .dupe = -1,
    .dedup = DEDUP_MAILBOX,
};

static const notmuch_opt_desc_t common_options[] = {
    { .opt_keyword = &search_context.sort, .name = "sort", .keywords =
	  (notmuch_keyword_t []){ { "oldest-first", NOTMUCH_SORT_OLDEST_FIRST },
				  { "newest-first", NOTMUCH_SORT_NEWEST_FIRST },
				  { 0, 0 } } },
    { .opt_keyword = &search_context.format_sel, .name = "format", .keywords =
	  (notmuch_keyword_t []){ { "json", NOTMUCH_FORMAT_JSON },
				  { "sexp", NOTMUCH_FORMAT_SEXP },
				  { "text", NOTMUCH_FORMAT_TEXT },
				  { "text0", NOTMUCH_FORMAT_TEXT0 },
				  { 0, 0 } } },
    { .opt_int = &notmuch_format_version, .name = "format-version" },
    { }
};

int
notmuch_search_command (notmuch_database_t *notmuch, int argc, char *argv[])
{
    search_context_t *ctx = &search_context;
    int opt_index, ret;

    notmuch_opt_desc_t options[] = {
	{ .opt_keyword = &ctx->output, .name = "output", .keywords =
	      (notmuch_keyword_t []){ { "summary", OUTPUT_SUMMARY },
				      { "threads", OUTPUT_THREADS },
				      { "messages", OUTPUT_MESSAGES },
				      { "files", OUTPUT_FILES },
				      { "tags", OUTPUT_TAGS },
				      { 0, 0 } } },
	{ .opt_keyword = &ctx->exclude, .name = "exclude", .keywords =
	      (notmuch_keyword_t []){ { "true", NOTMUCH_EXCLUDE_TRUE },
				      { "false", NOTMUCH_EXCLUDE_FALSE },
				      { "flag", NOTMUCH_EXCLUDE_FLAG },
				      { "all", NOTMUCH_EXCLUDE_ALL },
				      { 0, 0 } } },
	{ .opt_int = &ctx->offset, .name = "offset" },
	{ .opt_int = &ctx->limit, .name = "limit" },
	{ .opt_int = &ctx->dupe, .name = "duplicate" },
	{ .opt_inherit = common_options },
	{ .opt_inherit = notmuch_shared_options },
	{ }
    };

    ctx->notmuch = notmuch;
    ctx->output = OUTPUT_SUMMARY;
    opt_index = parse_arguments (argc, argv, options, 1);
    if (opt_index < 0)
	return EXIT_FAILURE;

    notmuch_process_shared_options (notmuch, argv[0]);

    if (ctx->output != OUTPUT_FILES && ctx->output != OUTPUT_MESSAGES &&
	ctx->dupe != -1) {
	fprintf (stderr,
		 "Error: --duplicate=N is only supported with --output=files and --output=messages.\n");
	return EXIT_FAILURE;
    }

    if (_notmuch_search_prepare (ctx, argc - opt_index, argv + opt_index))
	return EXIT_FAILURE;

    switch (ctx->output) {
    case OUTPUT_SUMMARY:
    case OUTPUT_THREADS:
	ret = do_search_threads (ctx);
	break;
    case OUTPUT_MESSAGES:
    case OUTPUT_FILES:
	ret = do_search_messages (ctx);
	break;
    case OUTPUT_TAGS:
	ret = do_search_tags (ctx);
	break;
    default:
	INTERNAL_ERROR ("Unexpected output");
    }

    _notmuch_search_cleanup (ctx);

    return ret ? EXIT_FAILURE : EXIT_SUCCESS;
}

int
notmuch_address_command (notmuch_database_t *notmuch, int argc, char *argv[])
{
    search_context_t *ctx = &search_context;
    int opt_index, ret;

    notmuch_opt_desc_t options[] = {
	{ .opt_flags = &ctx->output, .name = "output", .keywords =
	      (notmuch_keyword_t []){ { "sender", OUTPUT_SENDER },
				      { "recipients", OUTPUT_RECIPIENTS },
				      { "count", OUTPUT_COUNT },
				      { "address", OUTPUT_ADDRESS },
				      { 0, 0 } } },
	{ .opt_keyword = &ctx->exclude, .name = "exclude", .keywords =
	      (notmuch_keyword_t []){ { "true", NOTMUCH_EXCLUDE_TRUE },
				      { "false", NOTMUCH_EXCLUDE_FALSE },
				      { 0, 0 } } },
	{ .opt_keyword = &ctx->dedup, .name = "deduplicate", .keywords =
	      (notmuch_keyword_t []){ { "no", DEDUP_NONE },
				      { "mailbox", DEDUP_MAILBOX },
				      { "address", DEDUP_ADDRESS },
				      { 0, 0 } } },
	{ .opt_inherit = common_options },
	{ .opt_inherit = notmuch_shared_options },
	{ }
    };

    ctx->notmuch = notmuch;

    opt_index = parse_arguments (argc, argv, options, 1);
    if (opt_index < 0)
	return EXIT_FAILURE;

    notmuch_process_shared_options (notmuch, argv[0]);

    if (! (ctx->output & (OUTPUT_SENDER | OUTPUT_RECIPIENTS)))
	ctx->output |= OUTPUT_SENDER;

    if (ctx->output & OUTPUT_COUNT && ctx->dedup == DEDUP_NONE) {
	fprintf (stderr, "--output=count is not applicable with --deduplicate=no\n");
	return EXIT_FAILURE;
    }

    if (_notmuch_search_prepare (ctx, argc - opt_index, argv + opt_index))
	return EXIT_FAILURE;

    ctx->addresses = g_hash_table_new_full (strcase_hash, strcase_equal,
					    _talloc_free_for_g_hash,
					    _list_free_for_g_hash);

    /* The order is not guaranteed if a full pass is required, so go
     * for fastest. */
    if (ctx->output & OUTPUT_COUNT || ctx->dedup == DEDUP_ADDRESS)
	notmuch_query_set_sort (ctx->query, NOTMUCH_SORT_UNSORTED);

    ret = do_search_messages (ctx);

    g_hash_table_unref (ctx->addresses);


    _notmuch_search_cleanup (ctx);

    return ret ? EXIT_FAILURE : EXIT_SUCCESS;
}
debug log:

solving 47eec601 ...
found 47eec601 in https://yhetil.org/notmuch/20211219181854.115918-2-david@tethera.net/
found 327e1445 in notmuch.git
preparing index
index prepared:
100644 327e144564de48e0b339036528505d5a227bc40a	notmuch-search.c

applying [1/1] https://yhetil.org/notmuch/20211219181854.115918-2-david@tethera.net/
diff --git a/notmuch-search.c b/notmuch-search.c
index 327e1445..47eec601 100644

Checking patch notmuch-search.c...
Applied patch notmuch-search.c cleanly.

index at:
100644 47eec601c7e1230e8bbedddd07ab08d9ce7081f7	notmuch-search.c

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