-x --expunge

This commit is contained in:
Chad C. Starz 2024-04-05 02:08:50 +00:00
parent 8058774602
commit bf4f5ac788
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GPG Key ID: CEEBC9208C287297

285
bake.c
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@ -3,7 +3,7 @@
*
* Licensed under the GNU Public License version 3 only, see LICENSE.
*
* @BAKE cc -std=c89 -O2 @FILENAME -o @SHORT @ARGS @STOP
* @BAKE cc -std=c89 -O2 @FILENAME -o ${@SHORT} @ARGS # ${other-file} @STOP
*/
#define _POSIX_C_SOURCE 200809L
@ -29,6 +29,9 @@
#define START "@BAKE"
#define STOP "@STOP"
#define EXPUNGE_START "${"
#define EXPUNGE_STOP "}"
#define VERSION "20240302"
#define HELP \
@ -56,7 +59,8 @@ enum {
#define ARRLEN(a) (sizeof(a) / sizeof(a[0]))
#if INCLUDE_AUTONOMOUS_COMPILE
__attribute__((__section__(".text"))) static char autonomous_compile[] = "@BAKE cc -std=c89 -O2 $@.c -o $@ $+ @STOP";
__attribute__((__section__(".text"))) static char autonomous_compile[] =
"@BAKE cc -std=c89 -O2 $@.c -o $@ $+ @STOP";
#endif
static int bake_errno;
@ -64,7 +68,9 @@ static int bake_errno;
typedef struct {
char * buf;
size_t len;
} map_t;
} string_t;
typedef string_t map_t;
/*** root ***/
@ -82,10 +88,13 @@ root(char ** rootp) {
size_t len = strlen(root);
int ret;
while (len && root[len] != '/')
{ --len; }
while (len && root[len] != '/') {
--len;
}
if (!len) { return 0; }
if (!len) {
return 0;
}
swap(root + len, x);
ret = chdir(root);
@ -101,17 +110,22 @@ static map_t
map(char * fn) {
struct stat s;
int fd;
map_t m = (map_t) {0};
map_t m = (map_t) {
0
};
fd = open(fn, O_RDONLY);
if (fd != -1) {
if (!fstat(fd,&s)
&& s.st_mode & S_IFREG
&& s.st_size) {
if (!fstat(fd, &s)
&& s.st_mode & S_IFREG
&& s.st_size) {
m.len = (size_t) s.st_size;
m.buf = (char *) mmap(NULL, m.len, PROT_READ, MAP_SHARED, fd, 0);
}
close(fd);
}
return m;
}
@ -119,17 +133,42 @@ static char *
find(char * buf, char * x, char * end) {
size_t xlen = strlen(x);
char * start = buf;
for (; buf < end - xlen; ++buf) {
for (; buf <= end - xlen; ++buf) {
if (!strncmp(buf, x, xlen)) {
if (start < buf && buf[-1] == '\\') { continue; }
else { return buf; }
if (start < buf && buf[-1] == '\\') {
continue;
} else {
return buf;
}
}
}
return NULL;
}
static string_t
get_region(string_t m, char * findstart, char * findstop) {
string_t ret = { NULL, 0 };
char * end = m.len + m.buf;
ret.buf = find(m.buf, findstart, end);
if (ret.buf) {
char * stop = ret.buf + strlen(findstart);
stop = find(stop, findstop, end);
if (stop) {
ret.len = stop - ret.buf;
} else {
ret.buf = NULL;
}
}
return ret;
}
static char *
find_region(map_t m, char * findstart, char * findstop) {
find_region(string_t m, char * findstart, char * findstop) {
char * buf = NULL, * start, * stop, * end = m.len + m.buf;
start = find(m.buf, findstart, end);
@ -137,26 +176,32 @@ find_region(map_t m, char * findstart, char * findstop) {
start += strlen(findstart);
#ifdef REQUIRE_SPACE
if (!isspace(*start)) {
bake_errno = BAKE_MISSING_SUFFIX;
return NULL;
}
#endif /* REQUIRE_SPACE */
stop = find(start, findstop, end);
if (!stop) {
stop = start;
while (stop < end && *stop != '\n') {
if (stop[0] == '\\'
&& stop[1] == '\n') { stop += 2; }
&& stop[1] == '\n') {
stop += 2;
}
++stop;
}
}
if (stop)
{ buf = strndup(start, (size_t) (stop - m.buf) - (start - m.buf)); }
buf = strndup(start, (size_t) (stop - m.buf) - (start - m.buf));
}
return buf;
}
@ -164,10 +209,12 @@ static char *
file_find_region(char * fn, char * start, char * stop) {
char * buf = NULL;
map_t m = map(fn);
if (m.buf) {
buf = find_region(m, start, stop);
munmap(m.buf, m.len);
}
return buf;
}
@ -178,9 +225,13 @@ shorten(char * fn) {
size_t i, last, len;
static char sh[FILENAME_LIMIT];
len = strlen(fn);
for (last = i = 0; i < len; ++i) {
if (fn[i] == '.') { last = i; }
if (fn[i] == '.') {
last = i;
}
}
last = last ? last : i;
strncpy(sh, fn, last);
sh[last] = '\0';
@ -190,20 +241,28 @@ shorten(char * fn) {
static char *
all_args(size_t argc, char ** argv) {
char * all = NULL;
if (argc > 2) {
if (argc > 0) {
size_t i, len = argc;
for (i = 2; i < argc; ++i)
{ len += strlen(argv[i]); }
for (i = 0; i < argc; ++i) {
len += strlen(argv[i]);
}
all = malloc(len + 1);
all[len] = '\0';
for (len = 0, i = 2; i < argc; ++i) {
for (len = 0, i = 0; i < argc; ++i) {
strcpy(all + len, argv[i]);
len += strlen(argv[i]) + 1;
if (i + 1 < argc) { all[len - 1] = ' '; }
if (i + 1 < argc) {
all[len - 1] = ' ';
}
}
}
return all ? all : calloc(1,1);
return all ? all : calloc(1, 1);
}
/*** insert, expand, bake_expand ***/
@ -217,11 +276,12 @@ insert(char * str, char * new, size_t slen, size_t nlen, size_t shift) {
static char *
expand(char * buf, char * macro, char * with) {
ssize_t i,
blen = strlen(buf),
mlen = strlen(macro),
wlen = strlen(with),
nlen;
blen = strlen(buf),
mlen = strlen(macro),
wlen = strlen(with),
nlen;
fflush(stdout);
for (i = 0; i < blen - mlen + 1; ++i) {
if (!strncmp(buf + i, macro, mlen)) {
if (i && buf[i - 1] == '\\') {
@ -229,14 +289,17 @@ expand(char * buf, char * macro, char * with) {
buf[blen - 1] = '\0';
} else {
nlen = wlen - mlen + 1;
if (nlen > 0) {
buf = realloc(buf, blen + nlen);
buf = realloc(buf, blen + nlen);
}
insert(buf + i, with, blen - i, wlen, mlen);
blen += (nlen > 0) * nlen;
}
}
}
return buf;
}
@ -272,15 +335,19 @@ bake_expand(char * buf, char * filename, int argc, char ** argv) {
global[MACRO_STOP ] = "";
#if NEW_MACROS
for (i = 0; i < ARRLEN(macro); ++i) {
buf = expand(buf, macro[i], global[i]);
}
#endif
#if OLD_MACROS
for (i = 0; i < ARRLEN(macro_old); ++i) {
buf = expand(buf, macro_old[i], global[i]);
}
#endif
free(global[MACRO_ARGS]);
@ -288,6 +355,32 @@ bake_expand(char * buf, char * filename, int argc, char ** argv) {
return buf;
}
static string_t *
remove_expand(char * buf) {
string_t * rem = NULL;
size_t i = 0;
size_t f;
rem = (string_t *) realloc(rem, i + 1 * sizeof(string_t));
while (rem) {
fflush(stdout);
rem[i] = get_region((string_t) {
buf, strlen(buf)
}, EXPUNGE_START, EXPUNGE_STOP);
if (rem[i].buf) {
expand(rem[i].buf, EXPUNGE_START, "");
expand(rem[i].buf, EXPUNGE_STOP, "");
} else break;
++i;
rem = (string_t *) realloc(rem, (1 + i) * sizeof(string_t));
}
return rem;
}
/*** strip, run ***/
/* Strips all prefixing and leading whitespace.
@ -295,11 +388,23 @@ bake_expand(char * buf, char * filename, int argc, char ** argv) {
static size_t
strip(char * buf) {
size_t i = strlen(buf);
if (!i) { return 0; }
while (i && isspace(buf[i - 1])) { --i; }
if (!i) {
return 0;
}
while (i && isspace(buf[i - 1])) {
--i;
}
buf[i] = '\0';
for (i = 0; isspace(buf[i]); ++i);
if (i && buf[i - 1] == '\n') { --i; }
if (i && buf[i - 1] == '\n') {
--i;
}
return i;
}
@ -307,19 +412,27 @@ static int
run(char * buf, char * argv0) {
puts(BOLD GREEN "output" RESET ":\n");
pid_t pid;
if ((pid = fork()) == 0) {
execl("/bin/sh", "sh", "-c", buf, NULL);
return 0; /* execl overwrites the process anyways */
} else if (pid == -1) {
fprintf(stderr, BOLD RED "%s" RESET ": %s, %s\n", argv0, "Fork Error", strerror(errno));
fprintf(stderr, BOLD RED "%s" RESET ": %s, %s\n", argv0, "Fork Error",
strerror(errno));
return BAKE_ERROR;
} else {
int status;
if (waitpid(pid, &status, 0) < 0) {
fprintf(stderr, BOLD RED "%s" RESET ": %s, %s\n", argv0, "Wait PID Error", strerror(errno));
fprintf(stderr, BOLD RED "%s" RESET ": %s, %s\n", argv0, "Wait PID Error",
strerror(errno));
return BAKE_ERROR;
}
if (!WIFEXITED(status)) { return BAKE_ERROR; }
if (!WIFEXITED(status)) {
return BAKE_ERROR;
}
return WEXITSTATUS(status);
}
}
@ -328,35 +441,67 @@ run(char * buf, char * argv0) {
int
main(int argc, char ** argv) {
int ret = 0;
char * buf = NULL,
* filename,
* argv0;
enum { RET_RUN = 0, RET_NORUN = (1 << 0), RET_EXPUNGE = (1 << 1) };
int ret = RET_RUN;
char * buf = NULL,
* filename,
* argv0;
string_t * rem;
argv0 = argv[0];
if (argc < 2
|| !strcmp(argv[1], "-h")
|| !strcmp(argv[1], "--help"))
{ goto help; }
while (++argv, --argc && argv[0][0] == '-') {
++argv[0];
if (!strcmp(argv[1], "-v")
|| !strcmp(argv[1], "--version"))
{ goto version; }
if (argv[0][1] == '-') {
++argv[0];
if (!strcmp(argv[1], "-n")
|| !strcmp(argv[1], "--dry-run")) {
if (argc > 2) {
ret = 1;
--argc;
++argv;
}
else { goto help; }
if (!strcmp(argv[0], "help")) {
goto help;
} else if (!strcmp(argv[0], "version")) {
goto version;
} else if (!strcmp(argv[0], "expunge")) {
ret |= RET_EXPUNGE;
} else if (!strcmp(argv[0], "dry-run")) {
ret |= RET_NORUN;
} else {
puts("UNKNOWN");
goto help;
}
} else do {
switch (argv[0][0]) {
case 'h':
goto help;
case 'v':
goto version;
case 'x':
ret |= RET_EXPUNGE;
break;
case 'n':
ret |= RET_NORUN;
break;
case 0 :
goto next;
default :
puts("UNKNOWN");
goto help;
}
} while (++(argv[0]));
next:
}
filename = argv[1];
filename = argv[0];
++argv, --argc;
if (strlen(filename) > FILENAME_LIMIT) {
fprintf(stderr, BOLD RED "%s" RESET ": Filename too long (exceeds %d)\n", argv0, FILENAME_LIMIT);
fprintf(stderr, BOLD RED "%s" RESET ": Filename too long (exceeds %d)\n", argv0,
FILENAME_LIMIT);
return BAKE_ERROR;
}
@ -369,17 +514,37 @@ main(int argc, char ** argv) {
if (!buf) {
fprintf(stderr, BOLD RED "%s" RESET ": '" BOLD "%s" RESET "' %s.\n",
argv0, filename, errno ? strerror(errno) : error[bake_errno]);
argv0, filename, errno ? strerror(errno) : error[bake_errno]);
return BAKE_ERROR;
}
buf = bake_expand(buf, filename, argc, argv);
printf(BOLD GREEN "%s" RESET ": %s\n", argv0, buf + strip(buf));
ret = ret ? 0 : run(buf,argv0);
if (ret)
{ printf(BOLD RED "result" RESET ": " BOLD "%d\n" RESET, ret); }
rem = remove_expand(buf);
printf(BOLD GREEN "%s" RESET ": %s\n", argv0, buf + strip(buf));
if (!ret) {
ret = run(buf, argv0);
if (ret) {
printf(BOLD RED "result" RESET ": " BOLD "%d\n" RESET, ret);
}
} else if (ret & RET_EXPUNGE) {
if (ret & RET_NORUN) {
puts("NORUN");
} else {
size_t i;
for (i = 0; rem[i].buf; ++i) {
printf("removing: %s\n", rem[i].buf);
remove(rem[i].buf);
}
}
}
free(rem);
free(buf);
return ret;
help: