summaryrefslogtreecommitdiff
path: root/diff.c
diff options
context:
space:
mode:
Diffstat (limited to 'diff.c')
-rw-r--r--diff.c215
1 files changed, 152 insertions, 63 deletions
diff --git a/diff.c b/diff.c
index f62b7f73d8..2136b6970b 100644
--- a/diff.c
+++ b/diff.c
@@ -2,6 +2,7 @@
* Copyright (C) 2005 Junio C Hamano
*/
#include "cache.h"
+#include "tempfile.h"
#include "quote.h"
#include "diff.h"
#include "diffcore.h"
@@ -12,7 +13,7 @@
#include "run-command.h"
#include "utf8.h"
#include "userdiff.h"
-#include "sigchain.h"
+#include "submodule-config.h"
#include "submodule.h"
#include "ll-merge.h"
#include "string-list.h"
@@ -308,11 +309,26 @@ static const char *external_diff(void)
return external_diff_cmd;
}
+/*
+ * Keep track of files used for diffing. Sometimes such an entry
+ * refers to a temporary file, sometimes to an existing file, and
+ * sometimes to "/dev/null".
+ */
static struct diff_tempfile {
- const char *name; /* filename external diff should read from */
- char hex[41];
+ /*
+ * filename external diff should read from, or NULL if this
+ * entry is currently not in use:
+ */
+ const char *name;
+
+ char hex[GIT_SHA1_HEXSZ + 1];
char mode[10];
- char tmp_path[PATH_MAX];
+
+ /*
+ * If this diff_tempfile instance refers to a temporary file,
+ * this tempfile object is used to manage its lifetime.
+ */
+ struct tempfile tempfile;
} diff_temp[2];
typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len);
@@ -478,26 +494,59 @@ static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line
return ws_blank_line(line, len, ecbdata->ws_rule);
}
-static void emit_add_line(const char *reset,
- struct emit_callback *ecbdata,
- const char *line, int len)
+static void emit_line_checked(const char *reset,
+ struct emit_callback *ecbdata,
+ const char *line, int len,
+ enum color_diff color,
+ unsigned ws_error_highlight,
+ char sign)
{
- const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE);
- const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW);
+ const char *set = diff_get_color(ecbdata->color_diff, color);
+ const char *ws = NULL;
- if (!*ws)
- emit_line_0(ecbdata->opt, set, reset, '+', line, len);
- else if (new_blank_line_at_eof(ecbdata, line, len))
+ if (ecbdata->opt->ws_error_highlight & ws_error_highlight) {
+ ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE);
+ if (!*ws)
+ ws = NULL;
+ }
+
+ if (!ws)
+ emit_line_0(ecbdata->opt, set, reset, sign, line, len);
+ else if (sign == '+' && new_blank_line_at_eof(ecbdata, line, len))
/* Blank line at EOF - paint '+' as well */
- emit_line_0(ecbdata->opt, ws, reset, '+', line, len);
+ emit_line_0(ecbdata->opt, ws, reset, sign, line, len);
else {
/* Emit just the prefix, then the rest. */
- emit_line_0(ecbdata->opt, set, reset, '+', "", 0);
+ emit_line_0(ecbdata->opt, set, reset, sign, "", 0);
ws_check_emit(line, len, ecbdata->ws_rule,
ecbdata->opt->file, set, reset, ws);
}
}
+static void emit_add_line(const char *reset,
+ struct emit_callback *ecbdata,
+ const char *line, int len)
+{
+ emit_line_checked(reset, ecbdata, line, len,
+ DIFF_FILE_NEW, WSEH_NEW, '+');
+}
+
+static void emit_del_line(const char *reset,
+ struct emit_callback *ecbdata,
+ const char *line, int len)
+{
+ emit_line_checked(reset, ecbdata, line, len,
+ DIFF_FILE_OLD, WSEH_OLD, '-');
+}
+
+static void emit_context_line(const char *reset,
+ struct emit_callback *ecbdata,
+ const char *line, int len)
+{
+ emit_line_checked(reset, ecbdata, line, len,
+ DIFF_CONTEXT, WSEH_CONTEXT, ' ');
+}
+
static void emit_hunk_header(struct emit_callback *ecbdata,
const char *line, int len)
{
@@ -564,25 +613,16 @@ static struct diff_tempfile *claim_diff_tempfile(void) {
die("BUG: diff is failing to clean up its tempfiles");
}
-static int remove_tempfile_installed;
-
static void remove_tempfile(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(diff_temp); i++) {
- if (diff_temp[i].name == diff_temp[i].tmp_path)
- unlink_or_warn(diff_temp[i].name);
+ if (is_tempfile_active(&diff_temp[i].tempfile))
+ delete_tempfile(&diff_temp[i].tempfile);
diff_temp[i].name = NULL;
}
}
-static void remove_tempfile_on_signal(int signo)
-{
- remove_tempfile();
- sigchain_pop(signo);
- raise(signo);
-}
-
static void print_line_count(FILE *file, int count)
{
switch (count) {
@@ -603,7 +643,6 @@ static void emit_rewrite_lines(struct emit_callback *ecb,
{
const char *endp = NULL;
static const char *nneof = " No newline at end of file\n";
- const char *old = diff_get_color(ecb->color_diff, DIFF_FILE_OLD);
const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET);
while (0 < size) {
@@ -613,8 +652,7 @@ static void emit_rewrite_lines(struct emit_callback *ecb,
len = endp ? (endp - data + 1) : size;
if (prefix != '+') {
ecb->lno_in_preimage++;
- emit_line_0(ecb->opt, old, reset, '-',
- data, len);
+ emit_del_line(reset, ecb, data, len);
} else {
ecb->lno_in_postimage++;
emit_add_line(reset, ecb, data, len);
@@ -1251,17 +1289,27 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
return;
}
- if (line[0] != '+') {
- const char *color =
- diff_get_color(ecbdata->color_diff,
- line[0] == '-' ? DIFF_FILE_OLD : DIFF_CONTEXT);
- ecbdata->lno_in_preimage++;
- if (line[0] == ' ')
- ecbdata->lno_in_postimage++;
- emit_line(ecbdata->opt, color, reset, line, len);
- } else {
+ switch (line[0]) {
+ case '+':
ecbdata->lno_in_postimage++;
emit_add_line(reset, ecbdata, line + 1, len - 1);
+ break;
+ case '-':
+ ecbdata->lno_in_preimage++;
+ emit_del_line(reset, ecbdata, line + 1, len - 1);
+ break;
+ case ' ':
+ ecbdata->lno_in_postimage++;
+ ecbdata->lno_in_preimage++;
+ emit_context_line(reset, ecbdata, line + 1, len - 1);
+ break;
+ default:
+ /* incomplete line at the end */
+ ecbdata->lno_in_preimage++;
+ emit_line(ecbdata->opt,
+ diff_get_color(ecbdata->color_diff, DIFF_CONTEXT),
+ reset, line, len);
+ break;
}
}
@@ -2821,8 +2869,7 @@ static void prep_temp_blob(const char *path, struct diff_tempfile *temp,
strbuf_addstr(&template, "XXXXXX_");
strbuf_addstr(&template, base);
- fd = git_mkstemps(temp->tmp_path, PATH_MAX, template.buf,
- strlen(base) + 1);
+ fd = mks_tempfile_ts(&temp->tempfile, template.buf, strlen(base) + 1);
if (fd < 0)
die_errno("unable to create temp-file");
if (convert_to_working_tree(path,
@@ -2832,11 +2879,10 @@ static void prep_temp_blob(const char *path, struct diff_tempfile *temp,
}
if (write_in_full(fd, blob, size) != size)
die_errno("unable to write temp-file");
- close(fd);
- temp->name = temp->tmp_path;
- strcpy(temp->hex, sha1_to_hex(sha1));
- temp->hex[40] = 0;
- sprintf(temp->mode, "%06o", mode);
+ close_tempfile(&temp->tempfile);
+ temp->name = get_tempfile_path(&temp->tempfile);
+ sha1_to_hex_r(temp->hex, sha1);
+ xsnprintf(temp->mode, sizeof(temp->mode), "%06o", mode);
strbuf_release(&buf);
strbuf_release(&template);
free(path_dup);
@@ -2853,17 +2899,11 @@ static struct diff_tempfile *prepare_temp_file(const char *name,
* a '+' entry produces this for file-1.
*/
temp->name = "/dev/null";
- strcpy(temp->hex, ".");
- strcpy(temp->mode, ".");
+ xsnprintf(temp->hex, sizeof(temp->hex), ".");
+ xsnprintf(temp->mode, sizeof(temp->mode), ".");
return temp;
}
- if (!remove_tempfile_installed) {
- atexit(remove_tempfile);
- sigchain_push_common(remove_tempfile_on_signal);
- remove_tempfile_installed = 1;
- }
-
if (!S_ISGITLINK(one->mode) &&
(!one->sha1_valid ||
reuse_worktree_file(name, one->sha1, 1))) {
@@ -2888,16 +2928,16 @@ static struct diff_tempfile *prepare_temp_file(const char *name,
/* we can borrow from the file in the work tree */
temp->name = name;
if (!one->sha1_valid)
- strcpy(temp->hex, sha1_to_hex(null_sha1));
+ sha1_to_hex_r(temp->hex, null_sha1);
else
- strcpy(temp->hex, sha1_to_hex(one->sha1));
+ sha1_to_hex_r(temp->hex, one->sha1);
/* Even though we may sometimes borrow the
* contents from the work tree, we always want
* one->mode. mode is trustworthy even when
* !(one->sha1_valid), as long as
* DIFF_FILE_VALID(one).
*/
- sprintf(temp->mode, "%06o", one->mode);
+ xsnprintf(temp->mode, sizeof(temp->mode), "%06o", one->mode);
}
return temp;
}
@@ -3227,6 +3267,7 @@ void diff_setup(struct diff_options *options)
options->rename_limit = -1;
options->dirstat_permille = diff_dirstat_permille_default;
options->context = diff_context_default;
+ options->ws_error_highlight = WSEH_NEW;
DIFF_OPT_SET(options, RENAME_EMPTY);
/* pathchange left =NULL by default */
@@ -3613,12 +3654,55 @@ static void enable_patch_output(int *fmt) {
*fmt |= DIFF_FORMAT_PATCH;
}
-int diff_opt_parse(struct diff_options *options, const char **av, int ac)
+static int parse_one_token(const char **arg, const char *token)
+{
+ const char *rest;
+ if (skip_prefix(*arg, token, &rest) && (!*rest || *rest == ',')) {
+ *arg = rest;
+ return 1;
+ }
+ return 0;
+}
+
+static int parse_ws_error_highlight(struct diff_options *opt, const char *arg)
+{
+ const char *orig_arg = arg;
+ unsigned val = 0;
+ while (*arg) {
+ if (parse_one_token(&arg, "none"))
+ val = 0;
+ else if (parse_one_token(&arg, "default"))
+ val = WSEH_NEW;
+ else if (parse_one_token(&arg, "all"))
+ val = WSEH_NEW | WSEH_OLD | WSEH_CONTEXT;
+ else if (parse_one_token(&arg, "new"))
+ val |= WSEH_NEW;
+ else if (parse_one_token(&arg, "old"))
+ val |= WSEH_OLD;
+ else if (parse_one_token(&arg, "context"))
+ val |= WSEH_CONTEXT;
+ else {
+ error("unknown value after ws-error-highlight=%.*s",
+ (int)(arg - orig_arg), orig_arg);
+ return 0;
+ }
+ if (*arg)
+ arg++;
+ }
+ opt->ws_error_highlight = val;
+ return 1;
+}
+
+int diff_opt_parse(struct diff_options *options,
+ const char **av, int ac, const char *prefix)
{
const char *arg = av[0];
const char *optarg;
int argcount;
+ if (!prefix)
+ prefix = "";
+
/* Output format options */
if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch")
|| opt_arg(arg, 'U', "unified", &options->context))
@@ -3743,9 +3827,10 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
DIFF_OPT_SET(options, FIND_COPIES_HARDER);
else if (!strcmp(arg, "--follow"))
DIFF_OPT_SET(options, FOLLOW_RENAMES);
- else if (!strcmp(arg, "--no-follow"))
+ else if (!strcmp(arg, "--no-follow")) {
DIFF_OPT_CLR(options, FOLLOW_RENAMES);
- else if (!strcmp(arg, "--color"))
+ DIFF_OPT_CLR(options, DEFAULT_FOLLOW_RENAMES);
+ } else if (!strcmp(arg, "--color"))
options->use_color = 1;
else if (skip_prefix(arg, "--color=", &arg)) {
int value = git_config_colorbool(NULL, arg);
@@ -3810,6 +3895,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
DIFF_OPT_SET(options, SUBMODULE_LOG);
else if (skip_prefix(arg, "--submodule=", &arg))
return parse_submodule_opt(options, arg);
+ else if (skip_prefix(arg, "--ws-error-highlight=", &arg))
+ return parse_ws_error_highlight(options, arg);
/* misc options */
else if (!strcmp(arg, "-z"))
@@ -3832,7 +3919,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
else if (!strcmp(arg, "--pickaxe-regex"))
options->pickaxe_opts |= DIFF_PICKAXE_REGEX;
else if ((argcount = short_opt('O', av, &optarg))) {
- options->orderfile = optarg;
+ const char *path = prefix_filename(prefix, strlen(prefix), optarg);
+ options->orderfile = xstrdup(path);
return argcount;
}
else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) {
@@ -3871,9 +3959,10 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
else if (!strcmp(arg, "--no-function-context"))
DIFF_OPT_CLR(options, FUNCCONTEXT);
else if ((argcount = parse_long_opt("output", av, &optarg))) {
- options->file = fopen(optarg, "w");
+ const char *path = prefix_filename(prefix, strlen(prefix), optarg);
+ options->file = fopen(path, "w");
if (!options->file)
- die_errno("Could not open '%s'", optarg);
+ die_errno("Could not open '%s'", path);
options->close_file = 1;
return argcount;
} else
@@ -4000,9 +4089,9 @@ const char *diff_unique_abbrev(const unsigned char *sha1, int len)
if (abblen < 37) {
static char hex[41];
if (len < abblen && abblen <= len + 2)
- sprintf(hex, "%s%.*s", abbrev, len+3-abblen, "..");
+ xsnprintf(hex, sizeof(hex), "%s%.*s", abbrev, len+3-abblen, "..");
else
- sprintf(hex, "%s...", abbrev);
+ xsnprintf(hex, sizeof(hex), "%s...", abbrev);
return hex;
}
return sha1_to_hex(sha1);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-20 22:52:12 +0000