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/* ui-patch.c: generate patch view
 *
 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"
#include "ui-patch.h"
#include "html.h"
#include "ui-shared.h"

void cgit_print_patch(const char *new_rev, const char *old_rev,
		      const char *prefix)
{
	struct rev_info rev;
	struct commit *commit;
	unsigned char new_rev_sha1[20], old_rev_sha1[20];
	char rev_range[2 * 40 + 3];
	char *rev_argv[] = { NULL, "--reverse", "--format=email", rev_range };
	char *patchname;

	if (!new_rev)
		new_rev = ctx.qry.head;

	if (get_sha1(new_rev, new_rev_sha1)) {
		cgit_print_error("Bad object id: %s", new_rev);
		return;
	}
	commit = lookup_commit_reference(new_rev_sha1);
	if (!commit) {
		cgit_print_error("Bad commit reference: %s", new_rev);
		return;
	}

	if (old_rev) {
		if (get_sha1(old_rev, old_rev_sha1)) {
			cgit_print_error("Bad object id: %s", old_rev);
			return;
		}
		if (!lookup_commit_reference(old_rev_sha1)) {
			cgit_print_error("Bad commit reference: %s", old_rev);
			return;
		}
	} else if (commit->parents && commit->parents->item) {
		hashcpy(old_rev_sha1, commit->parents->item->object.sha1);
	} else {
		hashclr(old_rev_sha1);
	}

	if (is_null_sha1(old_rev_sha1)) {
		memcpy(rev_range, sha1_to_hex(new_rev_sha1), 41);
	} else {
		sprintf(rev_range, "%s..%s", sha1_to_hex(old_rev_sha1),
			sha1_to_hex(new_rev_sha1));
	}

	patchname = fmt("%s.patch", rev_range);
	ctx.page.mimetype = "text/plain";
	ctx.page.filename = patchname;
	cgit_print_http_headers();

	if (ctx.cfg.noplainemail) {
		rev_argv[2] = "--format=format:From %H Mon Sep 17 00:00:00 "
			      "2001%nFrom: %an%nDate: %aD%n%w(78,0,1)Subject: "
			      "%s%n%n%w(0)%b";
	}

	init_revisions(&rev, NULL);
	rev.abbrev = DEFAULT_ABBREV;
	rev.verbose_header = 1;
	rev.diff = 1;
	rev.show_root_diff = 1;
	rev.max_parents = 1;
	rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
	setup_revisions(ARRAY_SIZE(rev_argv), (const char **)rev_argv, &rev,
			NULL);
	prepare_revision_walk(&rev);

	while ((commit = get_revision(&rev)) != NULL) {
		log_tree_commit(&rev, commit);
		printf("-- \ncgit %s\n\n", cgit_version);
	}
}
/span>; }; struct cgit_query { int has_symref; int has_sha1; char *raw; char *repo; char *page; char *search; char *grep; char *head; char *sha1; char *sha2; char *path; char *name; int ofs; }; struct cgit_config { char *agefile; char *cache_root; char *clone_prefix; char *css; char *index_header; char *index_info; char *logo; char *logo_link; char *module_link; char *repo_group; char *robots; char *root_title; char *script_name; char *virtual_root; int cache_dynamic_ttl; int cache_max_create_time; int cache_repo_ttl; int cache_root_ttl; int cache_static_ttl; int enable_index_links; int enable_log_filecount; int enable_log_linecount; int max_commit_count; int max_lock_attempts; int max_msg_len; int max_repodesc_len; int nocache; int renamelimit; int snapshots; int summary_branches; int summary_log; int summary_tags; }; struct cgit_page { time_t modified; time_t expires; char *mimetype; char *charset; char *filename; char *title; }; struct cgit_context { struct cgit_query qry; struct cgit_config cfg; struct cgit_repo *repo; struct cgit_page page; }; struct cgit_snapshot_format { const char *suffix; const char *mimetype; write_archive_fn_t write_func; int bit; }; extern const char *cgit_version; extern struct cgit_repolist cgit_repolist; extern struct cgit_context ctx; extern const struct cgit_snapshot_format cgit_snapshot_formats[]; extern struct cgit_repo *cgit_add_repo(const char *url); extern struct cgit_repo *cgit_get_repoinfo(const char *url); extern void cgit_repo_config_cb(const char *name, const char *value); extern int chk_zero(int result, char *msg); extern int chk_positive(int result, char *msg); extern int chk_non_negative(int result, char *msg); extern char *trim_end(const char *str, char c); extern char *strlpart(char *txt, int maxlen); extern char *strrpart(char *txt, int maxlen); extern void cgit_add_ref(struct reflist *list, struct refinfo *ref); extern int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags, void *cb_data); extern void *cgit_free_commitinfo(struct commitinfo *info); extern int cgit_diff_files(const unsigned char *old_sha1, const unsigned char *new_sha1, linediff_fn fn); extern void cgit_diff_tree(const unsigned char *old_sha1, const unsigned char *new_sha1, filepair_fn fn, const char *prefix); extern void cgit_diff_commit(struct commit *commit, filepair_fn fn); extern char *fmt(const char *format,...); extern struct commitinfo *cgit_parse_commit(struct commit *commit); extern struct taginfo *cgit_parse_tag(struct tag *tag); extern void cgit_parse_url(const char *url); extern const char *cgit_repobasename(const char *reponame); extern int cgit_parse_snapshots_mask(const char *str); #endif /* CGIT_H */