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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "buffer.h"
#include "common.h"
#include "diff_generate.h"
#include "git2/email.h"
#include "git2/patch.h"
#include "git2/version.h"
/*
* Git uses a "magic" timestamp to indicate that an email message
* is from `git format-patch` (or our equivalent).
*/
#define EMAIL_TIMESTAMP "Mon Sep 17 00:00:00 2001"
GIT_INLINE(int) include_prefix(
size_t patch_count,
git_email_create_options *opts)
{
return ((!opts->subject_prefix || *opts->subject_prefix) ||
(opts->flags & GIT_EMAIL_CREATE_ALWAYS_NUMBER) != 0 ||
opts->reroll_number ||
(patch_count > 1 && !(opts->flags & GIT_EMAIL_CREATE_OMIT_NUMBERS)));
}
static int append_prefix(
git_buf *out,
size_t patch_idx,
size_t patch_count,
git_email_create_options *opts)
{
const char *subject_prefix = opts->subject_prefix ?
opts->subject_prefix : "PATCH";
if (!include_prefix(patch_count, opts))
return 0;
git_buf_putc(out, '[');
if (*subject_prefix)
git_buf_puts(out, subject_prefix);
if (opts->reroll_number) {
if (*subject_prefix)
git_buf_putc(out, ' ');
git_buf_printf(out, "v%" PRIuZ, opts->reroll_number);
}
if ((opts->flags & GIT_EMAIL_CREATE_ALWAYS_NUMBER) != 0 ||
(patch_count > 1 && !(opts->flags & GIT_EMAIL_CREATE_OMIT_NUMBERS))) {
size_t start_number = opts->start_number ?
opts->start_number : 1;
if (*subject_prefix || opts->reroll_number)
git_buf_putc(out, ' ');
git_buf_printf(out, "%" PRIuZ "/%" PRIuZ,
patch_idx + (start_number - 1),
patch_count + (start_number - 1));
}
git_buf_puts(out, "] ");
return git_buf_oom(out) ? -1 : 0;
}
static int append_subject(
git_buf *out,
git_commit *commit,
size_t patch_idx,
size_t patch_count,
git_email_create_options *opts)
{
int error;
if ((error = git_buf_puts(out, "Subject: ")) < 0 ||
(error = append_prefix(out, patch_idx, patch_count, opts)) < 0 ||
(error = git_buf_puts(out, git_commit_summary(commit))) < 0 ||
(error = git_buf_putc(out, '\n')) < 0)
return error;
return 0;
}
static int append_header(
git_buf *out,
git_commit *commit,
size_t patch_idx,
size_t patch_count,
git_email_create_options *opts)
{
const git_signature *author = git_commit_author(commit);
char id[GIT_OID_HEXSZ];
char date[GIT_DATE_RFC2822_SZ];
int error;
if ((error = git_oid_fmt(id, git_commit_id(commit))) < 0 ||
(error = git_buf_printf(out, "From %.*s %s\n", GIT_OID_HEXSZ, id, EMAIL_TIMESTAMP)) < 0 ||
(error = git_buf_printf(out, "From: %s <%s>\n", author->name, author->email)) < 0 ||
(error = git__date_rfc2822_fmt(date, sizeof(date), &author->when)) < 0 ||
(error = git_buf_printf(out, "Date: %s\n", date)) < 0 ||
(error = append_subject(out, commit, patch_idx, patch_count, opts)) < 0)
return error;
if ((error = git_buf_putc(out, '\n')) < 0)
return error;
return 0;
}
static int append_body(git_buf *out, git_commit *commit)
{
const char *body = git_commit_body(commit);
size_t body_len;
int error;
if (!body)
return 0;
body_len = strlen(body);
if ((error = git_buf_puts(out, body)) < 0)
return error;
if (body_len && body[body_len - 1] != '\n')
error = git_buf_putc(out, '\n');
return error;
}
static int append_diffstat(git_buf *out, git_diff *diff)
{
git_diff_stats *stats = NULL;
unsigned int format_flags;
int error;
format_flags = GIT_DIFF_STATS_FULL | GIT_DIFF_STATS_INCLUDE_SUMMARY;
if ((error = git_diff_get_stats(&stats, diff)) == 0 &&
(error = git_diff_stats_to_buf(out, stats, format_flags, 0)) == 0)
error = git_buf_putc(out, '\n');
git_diff_stats_free(stats);
return error;
}
static int append_patches(git_buf *out, git_diff *diff)
{
size_t i, deltas;
int error = 0;
deltas = git_diff_num_deltas(diff);
for (i = 0; i < deltas; ++i) {
git_patch *patch = NULL;
if ((error = git_patch_from_diff(&patch, diff, i)) >= 0)
error = git_patch_to_buf(out, patch);
git_patch_free(patch);
if (error < 0)
break;
}
return error;
}
int git_email_create_from_commit(
git_buf *out,
git_commit *commit,
const git_email_create_options *given_opts)
{
git_diff *diff = NULL;
git_email_create_options opts = GIT_EMAIL_CREATE_OPTIONS_INIT;
git_repository *repo;
int error = 0;
GIT_ASSERT_ARG(out);
GIT_ASSERT_ARG(commit);
GIT_ERROR_CHECK_VERSION(given_opts,
GIT_EMAIL_CREATE_OPTIONS_VERSION,
"git_email_create_options");
if (given_opts)
memcpy(&opts, given_opts, sizeof(git_email_create_options));
git_buf_sanitize(out);
git_buf_clear(out);
repo = git_commit_owner(commit);
if ((error = git_diff__commit(&diff, repo, commit, &opts.diff_opts)) == 0 &&
(error = append_header(out, commit, 1, 1, &opts)) == 0 &&
(error = append_body(out, commit)) == 0 &&
(error = git_buf_puts(out, "---\n")) == 0 &&
(error = append_diffstat(out, diff)) == 0 &&
(error = append_patches(out, diff)) == 0)
error = git_buf_puts(out, "--\nlibgit2 " LIBGIT2_VERSION "\n\n");
git_diff_free(diff);
return error;
}
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