#include "attr.h"
#include "run-command.h"
#include "utf8.h"
+#include "userdiff.h"
#ifdef NO_FAST_WORKING_DIRECTORY
#define FAST_WORKING_DIRECTORY 0
static int diff_detect_rename_default;
static int diff_rename_limit_default = 200;
+static int diff_suppress_blank_empty;
int diff_use_color_default = -1;
static const char *external_diff_cmd_cfg;
int diff_auto_refresh_index = 1;
+static int diff_mnemonic_prefix;
static char diff_colors[][COLOR_MAXLEN] = {
"\033[m", /* reset */
"\033[41m", /* WHITESPACE (red background) */
};
+static void diff_filespec_load_driver(struct diff_filespec *one);
+static char *run_textconv(const char *, struct diff_filespec *, size_t *);
+
static int parse_diff_color_slot(const char *var, int ofs)
{
if (!strcasecmp(var+ofs, "plain"))
die("bad config variable '%s'", var);
}
-static struct ll_diff_driver {
- const char *name;
- struct ll_diff_driver *next;
- const char *cmd;
-} *user_diff, **user_diff_tail;
-
-/*
- * Currently there is only "diff.<drivername>.command" variable;
- * because there are "diff.color.<slot>" variables, we are parsing
- * this in a bit convoluted way to allow low level diff driver
- * called "color".
- */
-static int parse_lldiff_command(const char *var, const char *ep, const char *value)
-{
- const char *name;
- int namelen;
- struct ll_diff_driver *drv;
-
- name = var + 5;
- namelen = ep - name;
- for (drv = user_diff; drv; drv = drv->next)
- if (!strncmp(drv->name, name, namelen) && !drv->name[namelen])
- break;
- if (!drv) {
- drv = xcalloc(1, sizeof(struct ll_diff_driver));
- drv->name = xmemdupz(name, namelen);
- if (!user_diff_tail)
- user_diff_tail = &user_diff;
- *user_diff_tail = drv;
- user_diff_tail = &(drv->next);
- }
-
- return git_config_string(&(drv->cmd), var, value);
-}
-
-/*
- * 'diff.<what>.funcname' attribute can be specified in the configuration
- * to define a customized regexp to find the beginning of a function to
- * be used for hunk header lines of "diff -p" style output.
- */
-struct funcname_pattern_entry {
- char *name;
- char *pattern;
- int cflags;
-};
-static struct funcname_pattern_list {
- struct funcname_pattern_list *next;
- struct funcname_pattern_entry e;
-} *funcname_pattern_list;
-
-static int parse_funcname_pattern(const char *var, const char *ep, const char *value, int cflags)
-{
- const char *name;
- int namelen;
- struct funcname_pattern_list *pp;
-
- name = var + 5; /* "diff." */
- namelen = ep - name;
-
- for (pp = funcname_pattern_list; pp; pp = pp->next)
- if (!strncmp(pp->e.name, name, namelen) && !pp->e.name[namelen])
- break;
- if (!pp) {
- pp = xcalloc(1, sizeof(*pp));
- pp->e.name = xmemdupz(name, namelen);
- pp->next = funcname_pattern_list;
- funcname_pattern_list = pp;
- }
- free(pp->e.pattern);
- pp->e.pattern = xstrdup(value);
- pp->e.cflags = cflags;
- return 0;
-}
-
/*
* These are to give UI layer defaults.
* The core-level commands such as git-diff-files should
diff_auto_refresh_index = git_config_bool(var, value);
return 0;
}
+ if (!strcmp(var, "diff.mnemonicprefix")) {
+ diff_mnemonic_prefix = git_config_bool(var, value);
+ return 0;
+ }
if (!strcmp(var, "diff.external"))
return git_config_string(&external_diff_cmd_cfg, var, value);
- if (!prefixcmp(var, "diff.")) {
- const char *ep = strrchr(var, '.');
- if (ep != var + 4 && !strcmp(ep, ".command"))
- return parse_lldiff_command(var, ep, value);
+ switch (userdiff_config_porcelain(var, value)) {
+ case 0: break;
+ case -1: return -1;
+ default: return 0;
}
return git_diff_basic_config(var, value, cb);
return 0;
}
- if (!prefixcmp(var, "diff.")) {
- const char *ep = strrchr(var, '.');
- if (ep != var + 4) {
- if (!strcmp(ep, ".funcname")) {
- if (!value)
- return config_error_nonbool(var);
- return parse_funcname_pattern(var, ep, value,
- 0);
- } else if (!strcmp(ep, ".xfuncname")) {
- if (!value)
- return config_error_nonbool(var);
- return parse_funcname_pattern(var, ep, value,
- REG_EXTENDED);
- }
- }
+ /* like GNU diff's --suppress-blank-empty option */
+ if (!strcmp(var, "diff.suppress-blank-empty")) {
+ diff_suppress_blank_empty = git_config_bool(var, value);
+ return 0;
+ }
+
+ switch (userdiff_config_basic(var, value)) {
+ case 0: break;
+ case -1: return -1;
+ default: return 0;
}
return git_color_default_config(var, value, cb);
{
int need_one = quote_c_style(one, NULL, NULL, 1);
int need_two = quote_c_style(two, NULL, NULL, 1);
- struct strbuf res;
+ struct strbuf res = STRBUF_INIT;
- strbuf_init(&res, 0);
if (need_one + need_two) {
strbuf_addch(&res, '"');
quote_c_style(one, &res, NULL, 1);
const char *new = diff_get_color(color_diff, DIFF_FILE_NEW);
const char *reset = diff_get_color(color_diff, DIFF_RESET);
static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT;
+ const char *a_prefix, *b_prefix;
+
+ if (diff_mnemonic_prefix && DIFF_OPT_TST(o, REVERSE_DIFF)) {
+ a_prefix = o->b_prefix;
+ b_prefix = o->a_prefix;
+ } else {
+ a_prefix = o->a_prefix;
+ b_prefix = o->b_prefix;
+ }
name_a += (*name_a == '/');
name_b += (*name_b == '/');
strbuf_reset(&a_name);
strbuf_reset(&b_name);
- quote_two_c_style(&a_name, o->a_prefix, name_a, 0);
- quote_two_c_style(&b_name, o->b_prefix, name_b, 0);
+ quote_two_c_style(&a_name, a_prefix, name_a, 0);
+ quote_two_c_style(&b_name, b_prefix, name_b, 0);
diff_populate_filespec(one, 0);
diff_populate_filespec(two, 0);
}
else if (diff_populate_filespec(one, 0))
return -1;
+
mf->ptr = one->data;
mf->size = one->size;
return 0;
}
struct diff_words_data {
- struct xdiff_emit_state xm;
struct diff_words_buffer minus, plus;
FILE *file;
};
xpp.flags = XDF_NEED_MINIMAL;
xecfg.ctxlen = diff_words->minus.alloc + diff_words->plus.alloc;
- ecb.outf = xdiff_outf;
- ecb.priv = diff_words;
- diff_words->xm.consume = fn_out_diff_words_aux;
- xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb);
-
+ xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words,
+ &xpp, &xecfg, &ecb);
free(minus.ptr);
free(plus.ptr);
diff_words->minus.text.size = diff_words->plus.text.size = 0;
typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len);
struct emit_callback {
- struct xdiff_emit_state xm;
int nparents, color_diff;
unsigned ws_rule;
sane_truncate_fn truncate;
ecbdata->label_path[0] = ecbdata->label_path[1] = NULL;
}
+ if (diff_suppress_blank_empty
+ && len == 2 && line[0] == ' ' && line[1] == '\n') {
+ line[0] = '\n';
+ len = 1;
+ }
+
/* This is not really necessary for now because
* this codepath only deals with two-way diffs.
*/
{
const char *old = a;
const char *new = b;
- struct strbuf name;
+ struct strbuf name = STRBUF_INIT;
int pfx_length, sfx_length;
int len_a = strlen(a);
int len_b = strlen(b);
int qlen_a = quote_c_style(a, NULL, NULL, 0);
int qlen_b = quote_c_style(b, NULL, NULL, 0);
- strbuf_init(&name, 0);
if (qlen_a || qlen_b) {
quote_c_style(a, &name, NULL, 0);
strbuf_addstr(&name, " => ");
}
struct diffstat_t {
- struct xdiff_emit_state xm;
-
int nr;
int alloc;
struct diffstat_file {
return;
if (!file->is_renamed) {
- struct strbuf buf;
- strbuf_init(&buf, 0);
+ struct strbuf buf = STRBUF_INIT;
if (quote_c_style(file->name, &buf, NULL, 0)) {
pname = strbuf_detach(&buf, NULL);
} else {
/*
* Original minus copied is the removed material,
* added is the new material. They are both damages
- * made to the preimage.
+ * 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.
*/
damage = (p->one->size - copied) + added;
+ if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE) && damage > 0)
+ damage = 1;
ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc);
dir.files[dir.nr].name = name;
}
struct checkdiff_t {
- struct xdiff_emit_state xm;
const char *filename;
int lineno;
struct diff_options *o;
emit_binary_diff_body(file, two, one);
}
-static void setup_diff_attr_check(struct git_attr_check *check)
+static void diff_filespec_load_driver(struct diff_filespec *one)
{
- static struct git_attr *attr_diff;
-
- if (!attr_diff) {
- attr_diff = git_attr("diff", 4);
- }
- check[0].attr = attr_diff;
+ if (!one->driver)
+ one->driver = userdiff_find_by_path(one->path);
+ if (!one->driver)
+ one->driver = userdiff_find_by_name("default");
}
-static void diff_filespec_check_attr(struct diff_filespec *one)
+int diff_filespec_is_binary(struct diff_filespec *one)
{
- struct git_attr_check attr_diff_check;
- int check_from_data = 0;
-
- if (one->checked_attr)
- return;
-
- setup_diff_attr_check(&attr_diff_check);
- one->is_binary = 0;
- one->funcname_pattern_ident = NULL;
-
- if (!git_checkattr(one->path, 1, &attr_diff_check)) {
- const char *value;
-
- /* binaryness */
- value = attr_diff_check.value;
- if (ATTR_TRUE(value))
- ;
- else if (ATTR_FALSE(value))
- one->is_binary = 1;
- else
- check_from_data = 1;
-
- /* funcname pattern ident */
- if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value))
- ;
- else
- one->funcname_pattern_ident = value;
- }
-
- if (check_from_data) {
- if (!one->data && DIFF_FILE_VALID(one))
- diff_populate_filespec(one, 0);
-
- if (one->data)
- one->is_binary = buffer_is_binary(one->data, one->size);
+ if (one->is_binary == -1) {
+ diff_filespec_load_driver(one);
+ if (one->driver->binary != -1)
+ one->is_binary = one->driver->binary;
+ else {
+ if (!one->data && DIFF_FILE_VALID(one))
+ diff_populate_filespec(one, 0);
+ if (one->data)
+ one->is_binary = buffer_is_binary(one->data,
+ one->size);
+ if (one->is_binary == -1)
+ one->is_binary = 0;
+ }
}
+ return one->is_binary;
}
-int diff_filespec_is_binary(struct diff_filespec *one)
+static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one)
{
- diff_filespec_check_attr(one);
- return one->is_binary;
+ diff_filespec_load_driver(one);
+ return one->driver->funcname.pattern ? &one->driver->funcname : NULL;
}
-static const struct funcname_pattern_entry *funcname_pattern(const char *ident)
-{
- struct funcname_pattern_list *pp;
-
- for (pp = funcname_pattern_list; pp; pp = pp->next)
- if (!strcmp(ident, pp->e.name))
- return &pp->e;
- return NULL;
-}
-
-static const struct funcname_pattern_entry builtin_funcname_pattern[] = {
- { "java",
- "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
- "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$",
- REG_EXTENDED },
- { "pascal",
- "^((procedure|function|constructor|destructor|interface|"
- "implementation|initialization|finalization)[ \t]*.*)$"
- "|"
- "^(.*=[ \t]*(class|record).*)$",
- REG_EXTENDED },
- { "bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
- REG_EXTENDED },
- { "tex",
- "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
- REG_EXTENDED },
- { "ruby", "^[ \t]*((class|module|def)[ \t].*)$",
- REG_EXTENDED },
-};
-
-static const struct funcname_pattern_entry *diff_funcname_pattern(struct diff_filespec *one)
+void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b)
{
- const char *ident;
- const struct funcname_pattern_entry *pe;
- int i;
-
- diff_filespec_check_attr(one);
- ident = one->funcname_pattern_ident;
-
- if (!ident)
- /*
- * If the config file has "funcname.default" defined, that
- * regexp is used; otherwise NULL is returned and xemit uses
- * the built-in default.
- */
- return funcname_pattern("default");
-
- /* Look up custom "funcname.$ident" regexp from config. */
- pe = funcname_pattern(ident);
- if (pe)
- return pe;
-
- /*
- * And define built-in fallback patterns here. Note that
- * these can be overridden by the user's config settings.
- */
- for (i = 0; i < ARRAY_SIZE(builtin_funcname_pattern); i++)
- if (!strcmp(ident, builtin_funcname_pattern[i].name))
- return &builtin_funcname_pattern[i];
+ if (!options->a_prefix)
+ options->a_prefix = a;
+ if (!options->b_prefix)
+ options->b_prefix = b;
+}
- return NULL;
+static const char *get_textconv(struct diff_filespec *one)
+{
+ if (!DIFF_FILE_VALID(one))
+ return NULL;
+ diff_filespec_load_driver(one);
+ return one->driver->textconv;
}
static void builtin_diff(const char *name_a,
char *a_one, *b_two;
const char *set = diff_get_color_opt(o, DIFF_METAINFO);
const char *reset = diff_get_color_opt(o, DIFF_RESET);
+ const char *a_prefix, *b_prefix;
+ const char *textconv_one, *textconv_two;
+
+ diff_set_mnemonic_prefix(o, "a/", "b/");
+ if (DIFF_OPT_TST(o, REVERSE_DIFF)) {
+ a_prefix = o->b_prefix;
+ b_prefix = o->a_prefix;
+ } else {
+ a_prefix = o->a_prefix;
+ b_prefix = o->b_prefix;
+ }
/* Never use a non-valid filename anywhere if at all possible */
name_a = DIFF_FILE_VALID(one) ? name_a : name_b;
name_b = DIFF_FILE_VALID(two) ? name_b : name_a;
- a_one = quote_two(o->a_prefix, name_a + (*name_a == '/'));
- b_two = quote_two(o->b_prefix, name_b + (*name_b == '/'));
+ a_one = quote_two(a_prefix, name_a + (*name_a == '/'));
+ b_two = quote_two(b_prefix, name_b + (*name_b == '/'));
lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null";
lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null";
fprintf(o->file, "%sdiff --git %s %s%s\n", set, a_one, b_two, reset);
if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
die("unable to read files to diff");
+ textconv_one = get_textconv(one);
+ textconv_two = get_textconv(two);
+
if (!DIFF_OPT_TST(o, TEXT) &&
- (diff_filespec_is_binary(one) || diff_filespec_is_binary(two))) {
+ ( (diff_filespec_is_binary(one) && !textconv_one) ||
+ (diff_filespec_is_binary(two) && !textconv_two) )) {
/* Quite common confusing case */
if (mf1.size == mf2.size &&
!memcmp(mf1.ptr, mf2.ptr, mf1.size))
xdemitconf_t xecfg;
xdemitcb_t ecb;
struct emit_callback ecbdata;
- const struct funcname_pattern_entry *pe;
+ const struct userdiff_funcname *pe;
+
+ if (textconv_one) {
+ size_t size;
+ mf1.ptr = run_textconv(textconv_one, one, &size);
+ if (!mf1.ptr)
+ die("unable to read files to diff");
+ mf1.size = size;
+ }
+ if (textconv_two) {
+ size_t size;
+ mf2.ptr = run_textconv(textconv_two, two, &size);
+ if (!mf2.ptr)
+ die("unable to read files to diff");
+ mf2.size = size;
+ }
pe = diff_funcname_pattern(one);
if (!pe)
xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10);
else if (!prefixcmp(diffopts, "-u"))
xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10);
- ecb.outf = xdiff_outf;
- ecb.priv = &ecbdata;
- ecbdata.xm.consume = fn_out_consume;
if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS)) {
ecbdata.diff_words =
xcalloc(1, sizeof(struct diff_words_data));
ecbdata.diff_words->file = o->file;
}
- xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+ xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata,
+ &xpp, &xecfg, &ecb);
if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS))
free_diff_words_data(&ecbdata);
+ if (textconv_one)
+ free(mf1.ptr);
+ if (textconv_two)
+ free(mf2.ptr);
}
free_ab_and_return:
memset(&xecfg, 0, sizeof(xecfg));
xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
- ecb.outf = xdiff_outf;
- ecb.priv = diffstat;
- xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+ xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat,
+ &xpp, &xecfg, &ecb);
}
free_and_return:
return;
memset(&data, 0, sizeof(data));
- data.xm.consume = checkdiff_consume;
data.filename = name_b ? name_b : name_a;
data.lineno = 0;
data.o = o;
memset(&xecfg, 0, sizeof(xecfg));
xecfg.ctxlen = 1; /* at least one context line */
xpp.flags = XDF_NEED_MINIMAL;
- ecb.outf = xdiff_outf;
- ecb.priv = &data;
- xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+ xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data,
+ &xpp, &xecfg, &ecb);
if ((data.ws_rule & WS_TRAILING_SPACE) &&
data.trailing_blanks_start) {
spec->path = (char *)(spec + 1);
memcpy(spec->path, path, namelen+1);
spec->count = 1;
+ spec->is_binary = -1;
return spec;
}
static int populate_from_stdin(struct diff_filespec *s)
{
- struct strbuf buf;
+ struct strbuf buf = STRBUF_INIT;
size_t size = 0;
- strbuf_init(&buf, 0);
if (strbuf_read(&buf, 0, 0) < 0)
return error("error while reading from stdin %s",
strerror(errno));
if (!s->sha1_valid ||
reuse_worktree_file(s->path, s->sha1, 0)) {
- struct strbuf buf;
+ struct strbuf buf = STRBUF_INIT;
struct stat st;
int fd;
/*
* Convert from working tree format to canonical git format
*/
- strbuf_init(&buf, 0);
if (convert_to_git(s->path, s->data, s->size, &buf, safe_crlf)) {
size_t size = 0;
munmap(s->data, s->size);
}
}
-static const char *external_diff_attr(const char *name)
-{
- struct git_attr_check attr_diff_check;
-
- if (!name)
- return NULL;
-
- setup_diff_attr_check(&attr_diff_check);
- if (!git_checkattr(name, 1, &attr_diff_check)) {
- const char *value = attr_diff_check.value;
- if (!ATTR_TRUE(value) &&
- !ATTR_FALSE(value) &&
- !ATTR_UNSET(value)) {
- struct ll_diff_driver *drv;
-
- for (drv = user_diff; drv; drv = drv->next)
- if (!strcmp(drv->name, value))
- return drv->cmd;
- }
- }
- return NULL;
-}
-
static void run_diff_cmd(const char *pgm,
const char *name,
const char *other,
if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL))
pgm = NULL;
else {
- const char *cmd = external_diff_attr(attr_path);
- if (cmd)
- pgm = cmd;
+ struct userdiff_driver *drv = userdiff_find_by_path(attr_path);
+ if (drv && drv->external)
+ pgm = drv->external;
}
if (pgm) {
DIFF_OPT_CLR(options, COLOR_DIFF);
options->detect_rename = diff_detect_rename_default;
- options->a_prefix = "a/";
- options->b_prefix = "b/";
+ if (!diff_mnemonic_prefix) {
+ options->a_prefix = "a/";
+ options->b_prefix = "b/";
+ }
}
int diff_setup_done(struct diff_options *options)
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, "--check"))
options->output_format |= DIFF_FORMAT_CHECKDIFF;
}
struct patch_id_t {
- struct xdiff_emit_state xm;
- SHA_CTX *ctx;
+ git_SHA_CTX *ctx;
int patchlen;
};
new_len = remove_space(line, len);
- SHA1_Update(data->ctx, line, new_len);
+ git_SHA1_Update(data->ctx, line, new_len);
data->patchlen += new_len;
}
{
struct diff_queue_struct *q = &diff_queued_diff;
int i;
- SHA_CTX ctx;
+ git_SHA_CTX ctx;
struct patch_id_t data;
char buffer[PATH_MAX * 4 + 20];
- SHA1_Init(&ctx);
+ git_SHA1_Init(&ctx);
memset(&data, 0, sizeof(struct patch_id_t));
data.ctx = &ctx;
- data.xm.consume = patch_id_consume;
for (i = 0; i < q->nr; i++) {
xpparam_t xpp;
len2, p->two->path,
len1, p->one->path,
len2, p->two->path);
- SHA1_Update(&ctx, buffer, len1);
+ git_SHA1_Update(&ctx, buffer, len1);
xpp.flags = XDF_NEED_MINIMAL;
xecfg.ctxlen = 3;
xecfg.flags = XDL_EMIT_FUNCNAMES;
- ecb.outf = xdiff_outf;
- ecb.priv = &data;
- xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+ xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data,
+ &xpp, &xecfg, &ecb);
}
- SHA1_Final(sha1, &ctx);
+ git_SHA1_Final(sha1, &ctx);
return 0;
}
struct diffstat_t diffstat;
memset(&diffstat, 0, sizeof(struct diffstat_t));
- diffstat.xm.consume = diffstat_consume;
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
if (check_pair_status(p))
fill_filespec(one, sha1, mode);
diff_queue(&diff_queued_diff, one, two)->is_unmerged = 1;
}
+
+static char *run_textconv(const char *pgm, struct diff_filespec *spec,
+ size_t *outsize)
+{
+ struct diff_tempfile temp;
+ const char *argv[3];
+ const char **arg = argv;
+ struct child_process child;
+ struct strbuf buf = STRBUF_INIT;
+
+ prepare_temp_file(spec->path, &temp, spec);
+ *arg++ = pgm;
+ *arg++ = temp.name;
+ *arg = NULL;
+
+ memset(&child, 0, sizeof(child));
+ child.argv = argv;
+ child.out = -1;
+ if (start_command(&child) != 0 ||
+ strbuf_read(&buf, child.out, 0) < 0 ||
+ finish_command(&child) != 0) {
+ if (temp.name == temp.tmp_path)
+ unlink(temp.name);
+ error("error running textconv command '%s'", pgm);
+ return NULL;
+ }
+ if (temp.name == temp.tmp_path)
+ unlink(temp.name);
+
+ return strbuf_detach(&buf, outsize);
+}