diff options
Diffstat (limited to 'src/email.c')
| -rw-r--r-- | src/email.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/src/email.c b/src/email.c new file mode 100644 index 000000000..b269dee67 --- /dev/null +++ b/src/email.c @@ -0,0 +1,211 @@ +/* + * 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; +} |