diff options
Diffstat (limited to 'log-tree.c')
| -rw-r--r-- | log-tree.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/log-tree.c b/log-tree.c new file mode 100644 index 000000000..3d404824a --- /dev/null +++ b/log-tree.c @@ -0,0 +1,175 @@ +#include "cache.h" +#include "diff.h" +#include "commit.h" +#include "log-tree.h" + +void init_log_tree_opt(struct log_tree_opt *opt) +{ + memset(opt, 0, sizeof *opt); + opt->ignore_merges = 1; + opt->header_prefix = ""; + opt->commit_format = CMIT_FMT_RAW; + diff_setup(&opt->diffopt); +} + +int log_tree_opt_parse(struct log_tree_opt *opt, const char **av, int ac) +{ + const char *arg; + int cnt = diff_opt_parse(&opt->diffopt, av, ac); + if (0 < cnt) + return cnt; + arg = *av; + if (!strcmp(arg, "-r")) + opt->diffopt.recursive = 1; + else if (!strcmp(arg, "-t")) { + opt->diffopt.recursive = 1; + opt->diffopt.tree_in_recursive = 1; + } + else if (!strcmp(arg, "-m")) + opt->ignore_merges = 0; + else if (!strcmp(arg, "-c")) + opt->combine_merges = 1; + else if (!strcmp(arg, "--cc")) { + opt->dense_combined_merges = 1; + opt->combine_merges = 1; + } + else if (!strcmp(arg, "-v")) { + opt->verbose_header = 1; + opt->header_prefix = "diff-tree "; + } + else if (!strncmp(arg, "--pretty", 8)) { + opt->verbose_header = 1; + opt->header_prefix = "diff-tree "; + opt->commit_format = get_commit_format(arg+8); + } + else if (!strcmp(arg, "--root")) + opt->show_root_diff = 1; + else if (!strcmp(arg, "--no-commit-id")) + opt->no_commit_id = 1; + else if (!strcmp(arg, "--always")) + opt->always_show_header = 1; + else + return 0; + return 1; +} + +int log_tree_diff_flush(struct log_tree_opt *opt) +{ + diffcore_std(&opt->diffopt); + if (diff_queue_is_empty()) { + int saved_fmt = opt->diffopt.output_format; + opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT; + diff_flush(&opt->diffopt); + opt->diffopt.output_format = saved_fmt; + return 0; + } + if (opt->header) { + if (!opt->no_commit_id) + printf("%s%c", opt->header, + opt->diffopt.line_termination); + opt->header = NULL; + } + diff_flush(&opt->diffopt); + return 1; +} + +static int diff_root_tree(struct log_tree_opt *opt, + const unsigned char *new, const char *base) +{ + int retval; + void *tree; + struct tree_desc empty, real; + + tree = read_object_with_reference(new, tree_type, &real.size, NULL); + if (!tree) + die("unable to read root tree (%s)", sha1_to_hex(new)); + real.buf = tree; + + empty.buf = ""; + empty.size = 0; + retval = diff_tree(&empty, &real, base, &opt->diffopt); + free(tree); + log_tree_diff_flush(opt); + return retval; +} + +static const char *generate_header(struct log_tree_opt *opt, + const unsigned char *commit_sha1, + const unsigned char *parent_sha1, + const struct commit *commit) +{ + static char this_header[16384]; + int offset; + unsigned long len; + int abbrev = opt->diffopt.abbrev; + const char *msg = commit->buffer; + + if (!opt->verbose_header) + return sha1_to_hex(commit_sha1); + + len = strlen(msg); + + offset = sprintf(this_header, "%s%s ", + opt->header_prefix, + diff_unique_abbrev(commit_sha1, abbrev)); + if (commit_sha1 != parent_sha1) + offset += sprintf(this_header + offset, "(from %s)\n", + parent_sha1 + ? diff_unique_abbrev(parent_sha1, abbrev) + : "root"); + else + offset += sprintf(this_header + offset, "(from parents)\n"); + offset += pretty_print_commit(opt->commit_format, commit, len, + this_header + offset, + sizeof(this_header) - offset, abbrev); + if (opt->always_show_header) { + puts(this_header); + return NULL; + } + return this_header; +} + +static int do_diff_combined(struct log_tree_opt *opt, struct commit *commit) +{ + unsigned const char *sha1 = commit->object.sha1; + + opt->header = generate_header(opt, sha1, sha1, commit); + opt->header = diff_tree_combined_merge(sha1, opt->header, + opt->dense_combined_merges, + &opt->diffopt); + if (!opt->header && opt->verbose_header) + opt->header_prefix = "\ndiff-tree "; + return 0; +} + +int log_tree_commit(struct log_tree_opt *opt, struct commit *commit) +{ + struct commit_list *parents; + unsigned const char *sha1 = commit->object.sha1; + + /* Root commit? */ + if (opt->show_root_diff && !commit->parents) { + opt->header = generate_header(opt, sha1, NULL, commit); + diff_root_tree(opt, sha1, ""); + } + + /* More than one parent? */ + if (commit->parents && commit->parents->next) { + if (opt->ignore_merges) + return 0; + else if (opt->combine_merges) + return do_diff_combined(opt, commit); + } + + for (parents = commit->parents; parents; parents = parents->next) { + struct commit *parent = parents->item; + unsigned const char *psha1 = parent->object.sha1; + opt->header = generate_header(opt, sha1, psha1, commit); + diff_tree_sha1(psha1, sha1, "", &opt->diffopt); + log_tree_diff_flush(opt); + + if (!opt->header && opt->verbose_header) + opt->header_prefix = "\ndiff-tree "; + } + return 0; +} |