diff options
Diffstat (limited to 'diff.c')
| -rw-r--r-- | diff.c | 282 |
1 files changed, 245 insertions, 37 deletions
@@ -31,6 +31,7 @@ static const char *external_diff_cmd_cfg; int diff_auto_refresh_index = 1; static int diff_mnemonic_prefix; static int diff_no_prefix; +static int diff_dirstat_permille_default = 30; static struct diff_options default_diff_options; static char diff_colors[][COLOR_MAXLEN] = { @@ -66,6 +67,58 @@ static int parse_diff_color_slot(const char *var, int ofs) return -1; } +static int parse_dirstat_params(struct diff_options *options, const char *params, + struct strbuf *errmsg) +{ + const char *p = params; + int p_len, ret = 0; + + while (*p) { + p_len = strchrnul(p, ',') - p; + if (!memcmp(p, "changes", p_len)) { + DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); + DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); + } else if (!memcmp(p, "lines", p_len)) { + DIFF_OPT_SET(options, DIRSTAT_BY_LINE); + DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); + } else if (!memcmp(p, "files", p_len)) { + DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); + DIFF_OPT_SET(options, DIRSTAT_BY_FILE); + } else if (!memcmp(p, "noncumulative", p_len)) { + DIFF_OPT_CLR(options, DIRSTAT_CUMULATIVE); + } else if (!memcmp(p, "cumulative", p_len)) { + DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); + } else if (isdigit(*p)) { + char *end; + int permille = strtoul(p, &end, 10) * 10; + if (*end == '.' && isdigit(*++end)) { + /* only use first digit */ + permille += *end - '0'; + /* .. and ignore any further digits */ + while (isdigit(*++end)) + ; /* nothing */ + } + if (end - p == p_len) + options->dirstat_permille = permille; + else { + strbuf_addf(errmsg, _(" Failed to parse dirstat cut-off percentage '%.*s'\n"), + p_len, p); + ret++; + } + } else { + strbuf_addf(errmsg, _(" Unknown dirstat parameter '%.*s'\n"), + p_len, p); + ret++; + } + + p += p_len; + + if (*p) + p++; /* more parameters, swallow separator */ + } + return ret; +} + static int git_config_rename(const char *var, const char *value) { if (!value) @@ -145,6 +198,17 @@ int git_diff_basic_config(const char *var, const char *value, void *cb) return 0; } + if (!strcmp(var, "diff.dirstat")) { + struct strbuf errmsg = STRBUF_INIT; + default_diff_options.dirstat_permille = diff_dirstat_permille_default; + if (parse_dirstat_params(&default_diff_options, value, &errmsg)) + warning(_("Found errors in 'diff.dirstat' config variable:\n%s"), + errmsg.buf); + strbuf_release(&errmsg); + diff_dirstat_permille_default = default_diff_options.dirstat_permille; + return 0; + } + if (!prefixcmp(var, "submodule.")) return parse_submodule_config_option(var, value); @@ -581,11 +645,14 @@ static void emit_rewrite_diff(const char *name_a, line_prefix, metainfo, a_name.buf, name_a_tab, reset, line_prefix, metainfo, b_name.buf, name_b_tab, reset, line_prefix, fraginfo); - print_line_count(o->file, lc_a); + if (!o->irreversible_delete) + print_line_count(o->file, lc_a); + else + fprintf(o->file, "?,?"); fprintf(o->file, " +"); print_line_count(o->file, lc_b); fprintf(o->file, " @@%s\n", reset); - if (lc_a) + if (lc_a && !o->irreversible_delete) emit_rewrite_lines(&ecbdata, '-', data_one, size_one); if (lc_b) emit_rewrite_lines(&ecbdata, '+', data_two, size_two); @@ -1050,8 +1117,16 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) emit_line(ecbdata->opt, plain, reset, line, len); fputs("~\n", ecbdata->opt->file); } else { - /* don't print the prefix character */ - emit_line(ecbdata->opt, plain, reset, line+1, len-1); + /* + * Skip the prefix character, if any. With + * diff_suppress_blank_empty, there may be + * none. + */ + if (line[0] != '\n') { + line++; + len--; + } + emit_line(ecbdata->opt, plain, reset, line, len); } return; } @@ -1452,7 +1527,7 @@ struct dirstat_file { struct dirstat_dir { struct dirstat_file *files; - int alloc, nr, percent, cumulative; + int alloc, nr, permille, cumulative; }; static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, @@ -1499,12 +1574,11 @@ static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, * under this directory (sources == 1). */ if (baselen && sources != 1) { - int permille = this_dir * 1000 / changed; - if (permille) { - int percent = permille / 10; - if (percent >= dir->percent) { + if (this_dir) { + int permille = this_dir * 1000 / changed; + if (permille >= dir->permille) { fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, - percent, permille % 10, baselen, base); + permille / 10, permille % 10, baselen, base); if (!dir->cumulative) return 0; } @@ -1530,7 +1604,7 @@ static void show_dirstat(struct diff_options *options) dir.files = NULL; dir.alloc = 0; dir.nr = 0; - dir.percent = options->dirstat_percent; + dir.permille = options->dirstat_permille; dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); changed = 0; @@ -1538,8 +1612,36 @@ static void show_dirstat(struct diff_options *options) struct diff_filepair *p = q->queue[i]; const char *name; unsigned long copied, added, damage; + int content_changed; + + name = p->two->path ? p->two->path : p->one->path; + + if (p->one->sha1_valid && p->two->sha1_valid) + content_changed = hashcmp(p->one->sha1, p->two->sha1); + else + content_changed = 1; - name = p->one->path ? p->one->path : p->two->path; + if (!content_changed) { + /* + * The SHA1 has not changed, so pre-/post-content is + * identical. We can therefore skip looking at the + * file contents altogether. + */ + damage = 0; + goto found_damage; + } + + if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE)) { + /* + * In --dirstat-by-file mode, we don't really need to + * look at the actual file contents at all. + * The fact that the SHA1 changed is enough for us to + * add this file to the list of results + * (with each file contributing equal damage). + */ + damage = 1; + goto found_damage; + } if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { diff_populate_filespec(p->one, 0); @@ -1563,14 +1665,18 @@ static void show_dirstat(struct diff_options *options) /* * Original minus copied is the removed material, * added is the new material. They are both damages - * made to the preimage. In --dirstat-by-file mode, count - * damaged files, not damaged lines. This is done by - * counting only a single damaged line per file. + * made to the preimage. + * If the resulting damage is zero, we know that + * diffcore_count_changes() considers the two entries to + * be identical, but since content_changed is true, we + * know that there must have been _some_ kind of change, + * so we force all entries to have damage > 0. */ damage = (p->one->size - copied) + added; - if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE) && damage > 0) + if (!damage) damage = 1; +found_damage: ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); dir.files[dir.nr].name = name; dir.files[dir.nr].changed = damage; @@ -1587,6 +1693,50 @@ static void show_dirstat(struct diff_options *options) gather_dirstat(options, &dir, changed, "", 0); } +static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *options) +{ + int i; + unsigned long changed; + struct dirstat_dir dir; + + if (data->nr == 0) + return; + + dir.files = NULL; + dir.alloc = 0; + dir.nr = 0; + dir.permille = options->dirstat_permille; + dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); + + changed = 0; + for (i = 0; i < data->nr; i++) { + struct diffstat_file *file = data->files[i]; + unsigned long damage = file->added + file->deleted; + if (file->is_binary) + /* + * binary files counts bytes, not lines. Must find some + * way to normalize binary bytes vs. textual lines. + * The following heuristic assumes that there are 64 + * bytes per "line". + * This is stupid and ugly, but very cheap... + */ + damage = (damage + 63) / 64; + ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); + dir.files[dir.nr].name = file->name; + dir.files[dir.nr].changed = damage; + changed += damage; + dir.nr++; + } + + /* This can happen even with many files, if everything was renames */ + if (!changed) + return; + + /* Show all directories with more than x% of the changes */ + qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); + gather_dirstat(options, &dir, changed, "", 0); +} + static void free_diffstat_info(struct diffstat_t *diffstat) { int i; @@ -1949,7 +2099,11 @@ static void builtin_diff(const char *name_a, } } - if (!DIFF_OPT_TST(o, TEXT) && + if (o->irreversible_delete && lbl[1][0] == '/') { + fprintf(o->file, "%s", header.buf); + strbuf_reset(&header); + goto free_ab_and_return; + } else if (!DIFF_OPT_TST(o, TEXT) && ( (!textconv_one && diff_filespec_is_binary(one)) || (!textconv_two && diff_filespec_is_binary(two)) )) { if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) @@ -1969,8 +2123,7 @@ static void builtin_diff(const char *name_a, fprintf(o->file, "%sBinary files %s and %s differ\n", line_prefix, lbl[0], lbl[1]); o->found_changes = 1; - } - else { + } else { /* Crazy xdl interfaces.. */ const char *diffopts = getenv("GIT_DIFF_OPTS"); xpparam_t xpp; @@ -2853,7 +3006,7 @@ void diff_setup(struct diff_options *options) options->line_termination = '\n'; options->break_opt = -1; options->rename_limit = -1; - options->dirstat_percent = 3; + options->dirstat_permille = diff_dirstat_permille_default; options->context = 3; options->change = diff_change; @@ -3111,6 +3264,21 @@ static int stat_opt(struct diff_options *options, const char **av) return argcount; } +static int parse_dirstat_opt(struct diff_options *options, const char *params) +{ + struct strbuf errmsg = STRBUF_INIT; + if (parse_dirstat_params(options, params, &errmsg)) + die(_("Failed to parse --dirstat/-X option parameter:\n%s"), + errmsg.buf); + strbuf_release(&errmsg); + /* + * The caller knows a dirstat-related option is given from the command + * line; allow it to say "return this_function();" + */ + options->output_format |= DIFF_FORMAT_DIRSTAT; + return 1; +} + int diff_opt_parse(struct diff_options *options, const char **av, int ac) { const char *arg = av[0]; @@ -3130,15 +3298,19 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) options->output_format |= DIFF_FORMAT_NUMSTAT; else if (!strcmp(arg, "--shortstat")) options->output_format |= DIFF_FORMAT_SHORTSTAT; - else if (opt_arg(arg, 'X', "dirstat", &options->dirstat_percent)) - options->output_format |= DIFF_FORMAT_DIRSTAT; - else if (!strcmp(arg, "--cumulative")) { - options->output_format |= DIFF_FORMAT_DIRSTAT; - DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); - } else if (opt_arg(arg, 0, "dirstat-by-file", - &options->dirstat_percent)) { - options->output_format |= DIFF_FORMAT_DIRSTAT; - DIFF_OPT_SET(options, DIRSTAT_BY_FILE); + else if (!strcmp(arg, "-X") || !strcmp(arg, "--dirstat")) + return parse_dirstat_opt(options, ""); + else if (!prefixcmp(arg, "-X")) + return parse_dirstat_opt(options, arg + 2); + else if (!prefixcmp(arg, "--dirstat=")) + return parse_dirstat_opt(options, arg + 10); + else if (!strcmp(arg, "--cumulative")) + return parse_dirstat_opt(options, "cumulative"); + else if (!strcmp(arg, "--dirstat-by-file")) + return parse_dirstat_opt(options, "files"); + else if (!prefixcmp(arg, "--dirstat-by-file=")) { + parse_dirstat_opt(options, "files"); + return parse_dirstat_opt(options, arg + 18); } else if (!strcmp(arg, "--check")) options->output_format |= DIFF_FORMAT_CHECKDIFF; @@ -3168,6 +3340,9 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) return error("invalid argument to -M: %s", arg+2); options->detect_rename = DIFF_DETECT_RENAME; } + else if (!strcmp(arg, "-D") || !strcmp(arg, "--irreversible-delete")) { + options->irreversible_delete = 1; + } else if (!prefixcmp(arg, "-C") || !prefixcmp(arg, "--find-copies=") || !strcmp(arg, "--find-copies")) { if (options->detect_rename == DIFF_DETECT_COPY) @@ -3955,11 +4130,34 @@ static int is_summary_empty(const struct diff_queue_struct *q) return 1; } +static const char rename_limit_warning[] = +"inexact rename detection was skipped due to too many files."; + +static const char degrade_cc_to_c_warning[] = +"only found copies from modified paths due to too many files."; + +static const char rename_limit_advice[] = +"you may want to set your %s variable to at least " +"%d and retry the command."; + +void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) +{ + if (degraded_cc) + warning(degrade_cc_to_c_warning); + else if (needed) + warning(rename_limit_warning); + else + return; + if (0 < needed && needed < 32767) + warning(rename_limit_advice, varname, needed); +} + void diff_flush(struct diff_options *options) { struct diff_queue_struct *q = &diff_queued_diff; int i, output_format = options->output_format; int separator = 0; + int dirstat_by_line = 0; /* * Order: raw, stat, summary, patch @@ -3980,7 +4178,11 @@ void diff_flush(struct diff_options *options) separator++; } - if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT)) { + if (output_format & DIFF_FORMAT_DIRSTAT && DIFF_OPT_TST(options, DIRSTAT_BY_LINE)) + dirstat_by_line = 1; + + if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT) || + dirstat_by_line) { struct diffstat_t diffstat; memset(&diffstat, 0, sizeof(struct diffstat_t)); @@ -3995,10 +4197,12 @@ void diff_flush(struct diff_options *options) show_stats(&diffstat, options); if (output_format & DIFF_FORMAT_SHORTSTAT) show_shortstats(&diffstat, options); + if (output_format & DIFF_FORMAT_DIRSTAT) + show_dirstat_by_line(&diffstat, options); free_diffstat_info(&diffstat); separator++; } - if (output_format & DIFF_FORMAT_DIRSTAT) + if ((output_format & DIFF_FORMAT_DIRSTAT) && !dirstat_by_line) show_dirstat(options); if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { @@ -4236,6 +4440,10 @@ void diffcore_std(struct diff_options *options) int diff_result_code(struct diff_options *opt, int status) { int result = 0; + + diff_warn_rename_limit("diff.renamelimit", + opt->needed_rename_limit, + opt->degraded_cc_to_c); if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) return status; @@ -4349,20 +4557,20 @@ void diff_change(struct diff_options *options, DIFF_OPT_SET(options, HAS_CHANGES); } -void diff_unmerge(struct diff_options *options, - const char *path, - unsigned mode, const unsigned char *sha1) +struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path) { + struct diff_filepair *pair; struct diff_filespec *one, *two; if (options->prefix && strncmp(path, options->prefix, options->prefix_length)) - return; + return NULL; one = alloc_filespec(path); two = alloc_filespec(path); - fill_filespec(one, sha1, mode); - diff_queue(&diff_queued_diff, one, two)->is_unmerged = 1; + pair = diff_queue(&diff_queued_diff, one, two); + pair->is_unmerged = 1; + return pair; } static char *run_textconv(const char *pgm, struct diff_filespec *spec, |