diff options
Diffstat (limited to 'convert.c')
| -rw-r--r-- | convert.c | 1454 |
1 files changed, 1276 insertions, 178 deletions
@@ -1,6 +1,9 @@ #include "cache.h" #include "attr.h" #include "run-command.h" +#include "quote.h" +#include "sigchain.h" +#include "pkt-line.h" /* * convert.c - convert a file when checking it out and checking it in. @@ -8,17 +11,28 @@ * This should use the pathname to decide on whether it wants to do some * more interesting conversions (automatic gzip/unzip, general format * conversions etc etc), but by default it just does automatic CRLF<->LF - * translation when the "auto_crlf" option is set. + * translation when the "text" attribute or "auto_crlf" option is set. */ -#define CRLF_GUESS (-1) -#define CRLF_BINARY 0 -#define CRLF_TEXT 1 -#define CRLF_INPUT 2 +/* Stat bits: When BIN is set, the txt bits are unset */ +#define CONVERT_STAT_BITS_TXT_LF 0x1 +#define CONVERT_STAT_BITS_TXT_CRLF 0x2 +#define CONVERT_STAT_BITS_BIN 0x4 + +enum crlf_action { + CRLF_UNDEFINED, + CRLF_BINARY, + CRLF_TEXT, + CRLF_TEXT_INPUT, + CRLF_TEXT_CRLF, + CRLF_AUTO, + CRLF_AUTO_INPUT, + CRLF_AUTO_CRLF +}; struct text_stat { /* NUL, CR, LF and CRLF counts */ - unsigned nul, cr, lf, crlf; + unsigned nul, lonecr, lonelf, crlf; /* These are just approximations! */ unsigned printable, nonprintable; @@ -33,13 +47,15 @@ static void gather_stats(const char *buf, unsigned long size, struct text_stat * for (i = 0; i < size; i++) { unsigned char c = buf[i]; if (c == '\r') { - stats->cr++; - if (i+1 < size && buf[i+1] == '\n') + if (i+1 < size && buf[i+1] == '\n') { stats->crlf++; + i++; + } else + stats->lonecr++; continue; } if (c == '\n') { - stats->lf++; + stats->lonelf++; continue; } if (c == 127) @@ -69,95 +85,239 @@ static void gather_stats(const char *buf, unsigned long size, struct text_stat * /* * The same heuristics as diff.c::mmfile_is_binary() + * We treat files with bare CR as binary */ -static int is_binary(unsigned long size, struct text_stat *stats) +static int convert_is_binary(unsigned long size, const struct text_stat *stats) { - + if (stats->lonecr) + return 1; if (stats->nul) return 1; if ((stats->printable >> 7) < stats->nonprintable) return 1; - /* - * Other heuristics? Average line length might be relevant, - * as might LF vs CR vs CRLF counts.. - * - * NOTE! It might be normal to have a low ratio of CRLF to LF - * (somebody starts with a LF-only file and edits it with an editor - * that adds CRLF only to lines that are added..). But do we - * want to support CR-only? Probably not. - */ return 0; } -static void check_safe_crlf(const char *path, int action, - struct text_stat *stats, enum safe_crlf checksafe) +static unsigned int gather_convert_stats(const char *data, unsigned long size) { - if (!checksafe) - return; + struct text_stat stats; + int ret = 0; + if (!data || !size) + return 0; + gather_stats(data, size, &stats); + if (convert_is_binary(size, &stats)) + ret |= CONVERT_STAT_BITS_BIN; + if (stats.crlf) + ret |= CONVERT_STAT_BITS_TXT_CRLF; + if (stats.lonelf) + ret |= CONVERT_STAT_BITS_TXT_LF; + + return ret; +} - if (action == CRLF_INPUT || auto_crlf <= 0) { +static const char *gather_convert_stats_ascii(const char *data, unsigned long size) +{ + unsigned int convert_stats = gather_convert_stats(data, size); + + if (convert_stats & CONVERT_STAT_BITS_BIN) + return "-text"; + switch (convert_stats) { + case CONVERT_STAT_BITS_TXT_LF: + return "lf"; + case CONVERT_STAT_BITS_TXT_CRLF: + return "crlf"; + case CONVERT_STAT_BITS_TXT_LF | CONVERT_STAT_BITS_TXT_CRLF: + return "mixed"; + default: + return "none"; + } +} + +const char *get_cached_convert_stats_ascii(const char *path) +{ + const char *ret; + unsigned long sz; + void *data = read_blob_data_from_cache(path, &sz); + ret = gather_convert_stats_ascii(data, sz); + free(data); + return ret; +} + +const char *get_wt_convert_stats_ascii(const char *path) +{ + const char *ret = ""; + struct strbuf sb = STRBUF_INIT; + if (strbuf_read_file(&sb, path, 0) >= 0) + ret = gather_convert_stats_ascii(sb.buf, sb.len); + strbuf_release(&sb); + return ret; +} + +static int text_eol_is_crlf(void) +{ + if (auto_crlf == AUTO_CRLF_TRUE) + return 1; + else if (auto_crlf == AUTO_CRLF_INPUT) + return 0; + if (core_eol == EOL_CRLF) + return 1; + if (core_eol == EOL_UNSET && EOL_NATIVE == EOL_CRLF) + return 1; + return 0; +} + +static enum eol output_eol(enum crlf_action crlf_action) +{ + switch (crlf_action) { + case CRLF_BINARY: + return EOL_UNSET; + case CRLF_TEXT_CRLF: + return EOL_CRLF; + case CRLF_TEXT_INPUT: + return EOL_LF; + case CRLF_UNDEFINED: + case CRLF_AUTO_CRLF: + return EOL_CRLF; + case CRLF_AUTO_INPUT: + return EOL_LF; + case CRLF_TEXT: + case CRLF_AUTO: + /* fall through */ + return text_eol_is_crlf() ? EOL_CRLF : EOL_LF; + } + warning("Illegal crlf_action %d\n", (int)crlf_action); + return core_eol; +} + +static void check_safe_crlf(const char *path, enum crlf_action crlf_action, + struct text_stat *old_stats, struct text_stat *new_stats, + enum safe_crlf checksafe) +{ + if (old_stats->crlf && !new_stats->crlf ) { /* - * CRLFs would not be restored by checkout: - * check if we'd remove CRLFs + * CRLFs would not be restored by checkout */ - if (stats->crlf) { - if (checksafe == SAFE_CRLF_WARN) - warning("CRLF will be replaced by LF in %s.", path); - else /* i.e. SAFE_CRLF_FAIL */ - die("CRLF would be replaced by LF in %s.", path); - } - } else if (auto_crlf > 0) { + if (checksafe == SAFE_CRLF_WARN) + warning(_("CRLF will be replaced by LF in %s.\n" + "The file will have its original line" + " endings in your working directory."), path); + else /* i.e. SAFE_CRLF_FAIL */ + die(_("CRLF would be replaced by LF in %s."), path); + } else if (old_stats->lonelf && !new_stats->lonelf ) { /* - * CRLFs would be added by checkout: - * check if we have "naked" LFs + * CRLFs would be added by checkout */ - if (stats->lf != stats->crlf) { - if (checksafe == SAFE_CRLF_WARN) - warning("LF will be replaced by CRLF in %s", path); - else /* i.e. SAFE_CRLF_FAIL */ - die("LF would be replaced by CRLF in %s", path); - } + if (checksafe == SAFE_CRLF_WARN) + warning(_("LF will be replaced by CRLF in %s.\n" + "The file will have its original line" + " endings in your working directory."), path); + else /* i.e. SAFE_CRLF_FAIL */ + die(_("LF would be replaced by CRLF in %s"), path); + } +} + +static int has_cr_in_index(const char *path) +{ + unsigned long sz; + void *data; + int has_cr; + + data = read_blob_data_from_cache(path, &sz); + if (!data) + return 0; + has_cr = memchr(data, '\r', sz) != NULL; + free(data); + return has_cr; +} + +static int will_convert_lf_to_crlf(size_t len, struct text_stat *stats, + enum crlf_action crlf_action) +{ + if (output_eol(crlf_action) != EOL_CRLF) + return 0; + /* No "naked" LF? Nothing to convert, regardless. */ + if (!stats->lonelf) + return 0; + + if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { + /* If we have any CR or CRLF line endings, we do not touch it */ + /* This is the new safer autocrlf-handling */ + if (stats->lonecr || stats->crlf) + return 0; + + if (convert_is_binary(len, stats)) + return 0; } + return 1; + } static int crlf_to_git(const char *path, const char *src, size_t len, - struct strbuf *buf, int action, enum safe_crlf checksafe) + struct strbuf *buf, + enum crlf_action crlf_action, enum safe_crlf checksafe) { struct text_stat stats; char *dst; + int convert_crlf_into_lf; - if ((action == CRLF_BINARY) || !auto_crlf || !len) + if (crlf_action == CRLF_BINARY || + (src && !len)) return 0; + /* + * If we are doing a dry-run and have no source buffer, there is + * nothing to analyze; we must assume we would convert. + */ + if (!buf && !src) + return 1; + gather_stats(src, len, &stats); + /* Optimization: No CRLF? Nothing to convert, regardless. */ + convert_crlf_into_lf = !!stats.crlf; - if (action == CRLF_GUESS) { - /* - * We're currently not going to even try to convert stuff - * that has bare CR characters. Does anybody do that crazy - * stuff? - */ - if (stats.cr != stats.crlf) + if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { + if (convert_is_binary(len, &stats)) return 0; - /* - * And add some heuristics for binary vs text, of course... + * If the file in the index has any CR in it, do not + * convert. This is the new safer autocrlf handling, + * unless we want to renormalize in a merge or + * cherry-pick. */ - if (is_binary(len, &stats)) - return 0; + if ((checksafe != SAFE_CRLF_RENORMALIZE) && has_cr_in_index(path)) + convert_crlf_into_lf = 0; } - - check_safe_crlf(path, action, &stats, checksafe); - - /* Optimization: No CR? Nothing to convert, regardless. */ - if (!stats.cr) + if ((checksafe == SAFE_CRLF_WARN || + (checksafe == SAFE_CRLF_FAIL)) && len) { + struct text_stat new_stats; + memcpy(&new_stats, &stats, sizeof(new_stats)); + /* simulate "git add" */ + if (convert_crlf_into_lf) { + new_stats.lonelf += new_stats.crlf; + new_stats.crlf = 0; + } + /* simulate "git checkout" */ + if (will_convert_lf_to_crlf(len, &new_stats, crlf_action)) { + new_stats.crlf += new_stats.lonelf; + new_stats.lonelf = 0; + } + check_safe_crlf(path, crlf_action, &stats, &new_stats, checksafe); + } + if (!convert_crlf_into_lf) return 0; + /* + * At this point all of our source analysis is done, and we are sure we + * would convert. If we are in dry-run mode, we can give an answer. + */ + if (!buf) + return 1; + /* only grow if not in place */ if (strbuf_avail(buf) + buf->len < len) strbuf_grow(buf, len - buf->len); dst = buf->buf; - if (action == CRLF_GUESS) { + if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { /* * If we guessed, we already know we rejected a file with * lone CR, and we can strip a CR without looking at what @@ -180,42 +340,23 @@ static int crlf_to_git(const char *path, const char *src, size_t len, } static int crlf_to_worktree(const char *path, const char *src, size_t len, - struct strbuf *buf, int action) + struct strbuf *buf, enum crlf_action crlf_action) { char *to_free = NULL; struct text_stat stats; - if ((action == CRLF_BINARY) || (action == CRLF_INPUT) || - auto_crlf <= 0) - return 0; - - if (!len) + if (!len || output_eol(crlf_action) != EOL_CRLF) return 0; gather_stats(src, len, &stats); - - /* No LF? Nothing to convert, regardless. */ - if (!stats.lf) - return 0; - - /* Was it already in CRLF format? */ - if (stats.lf == stats.crlf) + if (!will_convert_lf_to_crlf(len, &stats, crlf_action)) return 0; - if (action == CRLF_GUESS) { - /* If we have any bare CR characters, we're not going to touch it */ - if (stats.cr != stats.crlf) - return 0; - - if (is_binary(len, &stats)) - return 0; - } - /* are we "faking" in place editing ? */ if (src == buf->buf) to_free = strbuf_detach(buf, NULL); - strbuf_grow(buf, len + stats.lf - stats.crlf); + strbuf_grow(buf, len + stats.lonelf); for (;;) { const char *nl = memchr(src, '\n', len); if (!nl) @@ -238,40 +379,76 @@ static int crlf_to_worktree(const char *path, const char *src, size_t len, struct filter_params { const char *src; unsigned long size; + int fd; const char *cmd; + const char *path; }; -static int filter_buffer(int fd, void *data) +static int filter_buffer_or_fd(int in, int out, void *data) { /* * Spawn cmd and feed the buffer contents through its stdin. */ - struct child_process child_process; + struct child_process child_process = CHILD_PROCESS_INIT; struct filter_params *params = (struct filter_params *)data; int write_err, status; - const char *argv[] = { "sh", "-c", params->cmd, NULL }; + const char *argv[] = { NULL, NULL }; + + /* apply % substitution to cmd */ + struct strbuf cmd = STRBUF_INIT; + struct strbuf path = STRBUF_INIT; + struct strbuf_expand_dict_entry dict[] = { + { "f", NULL, }, + { NULL, NULL, }, + }; + + /* quote the path to preserve spaces, etc. */ + sq_quote_buf(&path, params->path); + dict[0].value = path.buf; + + /* expand all %f with the quoted path */ + strbuf_expand(&cmd, params->cmd, strbuf_expand_dict_cb, &dict); + strbuf_release(&path); + + argv[0] = cmd.buf; - memset(&child_process, 0, sizeof(child_process)); child_process.argv = argv; + child_process.use_shell = 1; child_process.in = -1; - child_process.out = fd; + child_process.out = out; if (start_command(&child_process)) - return error("cannot fork to run external filter %s", params->cmd); + return error("cannot fork to run external filter '%s'", params->cmd); + + sigchain_push(SIGPIPE, SIG_IGN); + + if (params->src) { + write_err = (write_in_full(child_process.in, + params->src, params->size) < 0); + if (errno == EPIPE) + write_err = 0; + } else { + write_err = copy_fd(params->fd, child_process.in); + if (write_err == COPY_WRITE_ERROR && errno == EPIPE) + write_err = 0; + } - write_err = (write_in_full(child_process.in, params->src, params->size) < 0); if (close(child_process.in)) write_err = 1; if (write_err) - error("cannot feed the input to external filter %s", params->cmd); + error("cannot feed the input to external filter '%s'", params->cmd); + + sigchain_pop(SIGPIPE); status = finish_command(&child_process); if (status) - error("external filter %s failed %d", params->cmd, -status); + error("external filter '%s' failed %d", params->cmd, status); + + strbuf_release(&cmd); return (write_err || status); } -static int apply_filter(const char *path, const char *src, size_t len, +static int apply_single_file_filter(const char *path, const char *src, size_t len, int fd, struct strbuf *dst, const char *cmd) { /* @@ -280,43 +457,324 @@ static int apply_filter(const char *path, const char *src, size_t len, * * (child --> cmd) --> us */ - int ret = 1; + int err = 0; struct strbuf nbuf = STRBUF_INIT; struct async async; struct filter_params params; - if (!cmd) - return 0; - memset(&async, 0, sizeof(async)); - async.proc = filter_buffer; + async.proc = filter_buffer_or_fd; async.data = ¶ms; + async.out = -1; params.src = src; params.size = len; + params.fd = fd; params.cmd = cmd; + params.path = path; fflush(NULL); if (start_async(&async)) return 0; /* error was already reported */ if (strbuf_read(&nbuf, async.out, len) < 0) { - error("read from external filter %s failed", cmd); - ret = 0; + err = error("read from external filter '%s' failed", cmd); } if (close(async.out)) { - error("read from external filter %s failed", cmd); - ret = 0; + err = error("read from external filter '%s' failed", cmd); } if (finish_async(&async)) { - error("external filter %s failed", cmd); - ret = 0; + err = error("external filter '%s' failed", cmd); } - if (ret) { + if (!err) { strbuf_swap(dst, &nbuf); } strbuf_release(&nbuf); - return ret; + return !err; +} + +#define CAP_CLEAN (1u<<0) +#define CAP_SMUDGE (1u<<1) + +struct cmd2process { + struct hashmap_entry ent; /* must be the first member! */ + unsigned int supported_capabilities; + const char *cmd; + struct child_process process; +}; + +static int cmd_process_map_initialized; +static struct hashmap cmd_process_map; + +static int cmd2process_cmp(const struct cmd2process *e1, + const struct cmd2process *e2, + const void *unused) +{ + return strcmp(e1->cmd, e2->cmd); +} + +static struct cmd2process *find_multi_file_filter_entry(struct hashmap *hashmap, const char *cmd) +{ + struct cmd2process key; + hashmap_entry_init(&key, strhash(cmd)); + key.cmd = cmd; + return hashmap_get(hashmap, &key, NULL); +} + +static int packet_write_list(int fd, const char *line, ...) +{ + va_list args; + int err; + va_start(args, line); + for (;;) { + if (!line) + break; + if (strlen(line) > LARGE_PACKET_DATA_MAX) + return -1; + err = packet_write_fmt_gently(fd, "%s\n", line); + if (err) + return err; + line = va_arg(args, const char*); + } + va_end(args); + return packet_flush_gently(fd); +} + +static void read_multi_file_filter_status(int fd, struct strbuf *status) +{ + struct strbuf **pair; + char *line; + for (;;) { + line = packet_read_line(fd, NULL); + if (!line) + break; + pair = strbuf_split_str(line, '=', 2); + if (pair[0] && pair[0]->len && pair[1]) { + /* the last "status=<foo>" line wins */ + if (!strcmp(pair[0]->buf, "status=")) { + strbuf_reset(status); + strbuf_addbuf(status, pair[1]); + } + } + strbuf_list_free(pair); + } +} + +static void kill_multi_file_filter(struct hashmap *hashmap, struct cmd2process *entry) +{ + if (!entry) + return; + + entry->process.clean_on_exit = 0; + kill(entry->process.pid, SIGTERM); + finish_command(&entry->process); + + hashmap_remove(hashmap, entry, NULL); + free(entry); +} + +static void stop_multi_file_filter(struct child_process *process) +{ + sigchain_push(SIGPIPE, SIG_IGN); + /* Closing the pipe signals the filter to initiate a shutdown. */ + close(process->in); + close(process->out); + sigchain_pop(SIGPIPE); + /* Finish command will wait until the shutdown is complete. */ + finish_command(process); +} + +static struct cmd2process *start_multi_file_filter(struct hashmap *hashmap, const char *cmd) +{ + int err; + struct cmd2process *entry; + struct child_process *process; + const char *argv[] = { cmd, NULL }; + struct string_list cap_list = STRING_LIST_INIT_NODUP; + char *cap_buf; + const char *cap_name; + + entry = xmalloc(sizeof(*entry)); + entry->cmd = cmd; + entry->supported_capabilities = 0; + process = &entry->process; + + child_process_init(process); + process->argv = argv; + process->use_shell = 1; + process->in = -1; + process->out = -1; + process->clean_on_exit = 1; + process->clean_on_exit_handler = stop_multi_file_filter; + + if (start_command(process)) { + error("cannot fork to run external filter '%s'", cmd); + return NULL; + } + + hashmap_entry_init(entry, strhash(cmd)); + + sigchain_push(SIGPIPE, SIG_IGN); + + err = packet_write_list(process->in, "git-filter-client", "version=2", NULL); + if (err) + goto done; + + err = strcmp(packet_read_line(process->out, NULL), "git-filter-server"); + if (err) { + error("external filter '%s' does not support filter protocol version 2", cmd); + goto done; + } + err = strcmp(packet_read_line(process->out, NULL), "version=2"); + if (err) + goto done; + err = packet_read_line(process->out, NULL) != NULL; + if (err) + goto done; + + err = packet_write_list(process->in, "capability=clean", "capability=smudge", NULL); + + for (;;) { + cap_buf = packet_read_line(process->out, NULL); + if (!cap_buf) + break; + string_list_split_in_place(&cap_list, cap_buf, '=', 1); + + if (cap_list.nr != 2 || strcmp(cap_list.items[0].string, "capability")) + continue; + + cap_name = cap_list.items[1].string; + if (!strcmp(cap_name, "clean")) { + entry->supported_capabilities |= CAP_CLEAN; + } else if (!strcmp(cap_name, "smudge")) { + entry->supported_capabilities |= CAP_SMUDGE; + } else { + warning( + "external filter '%s' requested unsupported filter capability '%s'", + cmd, cap_name + ); + } + + string_list_clear(&cap_list, 0); + } + +done: + sigchain_pop(SIGPIPE); + + if (err || errno == EPIPE) { + error("initialization for external filter '%s' failed", cmd); + kill_multi_file_filter(hashmap, entry); + return NULL; + } + + hashmap_add(hashmap, entry); + return entry; +} + +static int apply_multi_file_filter(const char *path, const char *src, size_t len, + int fd, struct strbuf *dst, const char *cmd, + const unsigned int wanted_capability) +{ + int err; + struct cmd2process *entry; + struct child_process *process; + struct strbuf nbuf = STRBUF_INIT; + struct strbuf filter_status = STRBUF_INIT; + const char *filter_type; + + if (!cmd_process_map_initialized) { + cmd_process_map_initialized = 1; + hashmap_init(&cmd_process_map, (hashmap_cmp_fn) cmd2process_cmp, 0); + entry = NULL; + } else { + entry = find_multi_file_filter_entry(&cmd_process_map, cmd); + } + + fflush(NULL); + + if (!entry) { + entry = start_multi_file_filter(&cmd_process_map, cmd); + if (!entry) + return 0; + } + process = &entry->process; + + if (!(wanted_capability & entry->supported_capabilities)) + return 0; + + if (CAP_CLEAN & wanted_capability) + filter_type = "clean"; + else if (CAP_SMUDGE & wanted_capability) + filter_type = "smudge"; + else + die("unexpected filter type"); + + sigchain_push(SIGPIPE, SIG_IGN); + + assert(strlen(filter_type) < LARGE_PACKET_DATA_MAX - strlen("command=\n")); + err = packet_write_fmt_gently(process->in, "command=%s\n", filter_type); + if (err) + goto done; + + err = strlen(path) > LARGE_PACKET_DATA_MAX - strlen("pathname=\n"); + if (err) { + error("path name too long for external filter"); + goto done; + } + + err = packet_write_fmt_gently(process->in, "pathname=%s\n", path); + if (err) + goto done; + + err = packet_flush_gently(process->in); + if (err) + goto done; + + if (fd >= 0) + err = write_packetized_from_fd(fd, process->in); + else + err = write_packetized_from_buf(src, len, process->in); + if (err) + goto done; + + read_multi_file_filter_status(process->out, &filter_status); + err = strcmp(filter_status.buf, "success"); + if (err) + goto done; + + err = read_packetized_to_strbuf(process->out, &nbuf) < 0; + if (err) + goto done; + + read_multi_file_filter_status(process->out, &filter_status); + err = strcmp(filter_status.buf, "success"); + +done: + sigchain_pop(SIGPIPE); + + if (err || errno == EPIPE) { + if (!strcmp(filter_status.buf, "error")) { + /* The filter signaled a problem with the file. */ + } else if (!strcmp(filter_status.buf, "abort")) { + /* + * The filter signaled a permanent problem. Don't try to filter + * files with the same command for the lifetime of the current + * Git process. + */ + entry->supported_capabilities &= ~wanted_capability; + } else { + /* + * Something went wrong with the protocol filter. + * Force shutdown and restart if another blob requires filtering. + */ + error("external filter '%s' failed", cmd); + kill_multi_file_filter(&cmd_process_map, entry); + } + } else { + strbuf_swap(dst, &nbuf); + } + strbuf_release(&nbuf); + return !err; } static struct convert_driver { @@ -324,11 +782,38 @@ static struct convert_driver { struct convert_driver *next; const char *smudge; const char *clean; + const char *process; + int required; } *user_convert, **user_convert_tail; +static int apply_filter(const char *path, const char *src, size_t len, + int fd, struct strbuf *dst, struct convert_driver *drv, + const unsigned int wanted_capability) +{ + const char *cmd = NULL; + + if (!drv) + return 0; + + if (!dst) + return 1; + + if ((CAP_CLEAN & wanted_capability) && !drv->process && drv->clean) + cmd = drv->clean; + else if ((CAP_SMUDGE & wanted_capability) && !drv->process && drv->smudge) + cmd = drv->smudge; + + if (cmd && *cmd) + return apply_single_file_filter(path, src, len, fd, dst, cmd); + else if (drv->process && *drv->process) + return apply_multi_file_filter(path, src, len, fd, dst, drv->process, wanted_capability); + + return 0; +} + static int read_convert_config(const char *var, const char *value, void *cb) { - const char *ep, *name; + const char *key, *name; int namelen; struct convert_driver *drv; @@ -336,10 +821,8 @@ static int read_convert_config(const char *var, const char *value, void *cb) * External conversion drivers are configured using * "filter.<name>.variable". */ - if (prefixcmp(var, "filter.") || (ep = strrchr(var, '.')) == var + 6) + if (parse_config_key(var, "filter", &name, &namelen, &key) < 0 || !name) return 0; - name = var + 7; - namelen = ep - name; for (drv = user_convert; drv; drv = drv->next) if (!strncmp(drv->name, name, namelen) && !drv->name[namelen]) break; @@ -350,8 +833,6 @@ static int read_convert_config(const char *var, const char *value, void *cb) user_convert_tail = &(drv->next); } - ep++; - /* * filter.<name>.smudge and filter.<name>.clean specifies * the command line: @@ -361,31 +842,21 @@ static int read_convert_config(const char *var, const char *value, void *cb) * The command-line will not be interpolated in any way. */ - if (!strcmp("smudge", ep)) + if (!strcmp("smudge", key)) return git_config_string(&drv->smudge, var, value); - if (!strcmp("clean", ep)) + if (!strcmp("clean", key)) return git_config_string(&drv->clean, var, value); - return 0; -} - -static void setup_convert_check(struct git_attr_check *check) -{ - static struct git_attr *attr_crlf; - static struct git_attr *attr_ident; - static struct git_attr *attr_filter; + if (!strcmp("process", key)) + return git_config_string(&drv->process, var, value); - if (!attr_crlf) { - attr_crlf = git_attr("crlf", 4); - attr_ident = git_attr("ident", 5); - attr_filter = git_attr("filter", 6); - user_convert_tail = &user_convert; - git_config(read_convert_config, NULL); + if (!strcmp("required", key)) { + drv->required = git_config_bool(var, value); + return 0; } - check[0].attr = attr_crlf; - check[1].attr = attr_ident; - check[2].attr = attr_filter; + + return 0; } static int count_ident(const char *cp, unsigned long size) @@ -423,6 +894,8 @@ static int count_ident(const char *cp, unsigned long size) cnt++; break; } + if (ch == '\n') + break; } } return cnt; @@ -433,9 +906,12 @@ static int ident_to_git(const char *path, const char *src, size_t len, { char *dst, *dollar; - if (!ident || !count_ident(src, len)) + if (!ident || (src && !count_ident(src, len))) return 0; + if (!buf) + return 1; + /* only grow if not in place */ if (strbuf_avail(buf) + buf->len < len) strbuf_grow(buf, len - buf->len); @@ -444,7 +920,7 @@ static int ident_to_git(const char *path, const char *src, size_t len, dollar = memchr(src, '$', len); if (!dollar) break; - memcpy(dst, src, dollar + 1 - src); + memmove(dst, src, dollar + 1 - src); dst += dollar + 1 - src; len -= dollar + 1 - src; src = dollar + 1; @@ -453,13 +929,18 @@ static int ident_to_git(const char *path, const char *src, size_t len, dollar = memchr(src + 3, '$', len - 3); if (!dollar) break; + if (memchr(src + 3, '\n', dollar - src - 3)) { + /* Line break before the next dollar. */ + continue; + } + memcpy(dst, "Id$", 3); dst += 3; len -= dollar + 1 - src; src = dollar + 1; } } - memcpy(dst, src, len); + memmove(dst, src, len); strbuf_setlen(buf, dst + len - buf->buf); return 1; } @@ -468,7 +949,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len, struct strbuf *buf, int ident) { unsigned char sha1[20]; - char *to_free = NULL, *dollar; + char *to_free = NULL, *dollar, *spc; int cnt; if (!ident) @@ -504,7 +985,10 @@ static int ident_to_worktree(const char *path, const char *src, size_t len, } else if (src[2] == ':') { /* * It's possible that an expanded Id has crept its way into the - * repository, we cope with that by stripping the expansion out + * repository, we cope with that by stripping the expansion out. + * This is probably not a good idea, since it will cause changes + * on checkout, which won't go away by stash, but let's keep it + * for git-style ids. */ dollar = memchr(src + 3, '$', len - 3); if (!dollar) { @@ -512,6 +996,20 @@ static int ident_to_worktree(const char *path, const char *src, size_t len, break; } + if (memchr(src + 3, '\n', dollar - src - 3)) { + /* Line break before the next dollar. */ + continue; + } + + spc = memchr(src + 4, ' ', dollar - src - 4); + if (spc && spc < dollar-1) { + /* There are spaces in unexpected places. + * This is probably an id from some other + * versioning system. Keep it for now. + */ + continue; + } + len -= dollar + 1 - src; src = dollar + 1; } else { @@ -530,7 +1028,7 @@ static int ident_to_worktree(const char *path, const char *src, size_t len, return 1; } -static int git_path_check_crlf(const char *path, struct git_attr_check *check) +static enum crlf_action git_path_check_crlf(struct attr_check_item *check) { const char *value = check->value; @@ -541,12 +1039,26 @@ static int git_path_check_crlf(const char *path, struct git_attr_check *check) else if (ATTR_UNSET(value)) ; else if (!strcmp(value, "input")) - return CRLF_INPUT; - return CRLF_GUESS; + return CRLF_TEXT_INPUT; + else if (!strcmp(value, "auto")) + return CRLF_AUTO; + return CRLF_UNDEFINED; } -static struct convert_driver *git_path_check_convert(const char *path, - struct git_attr_check *check) +static enum eol git_path_check_eol(struct attr_check_item *check) +{ + const char *value = check->value; + + if (ATTR_UNSET(value)) + ; + else if (!strcmp(value, "lf")) + return EOL_LF; + else if (!strcmp(value, "crlf")) + return EOL_CRLF; + return EOL_UNSET; +} + +static struct convert_driver *git_path_check_convert(struct attr_check_item *check) { const char *value = check->value; struct convert_driver *drv; @@ -559,70 +1071,656 @@ static struct convert_driver *git_path_check_convert(const char *path, return NULL; } -static int git_path_check_ident(const char *path, struct git_attr_check *check) +static int git_path_check_ident(struct attr_check_item *check) { const char *value = check->value; return !!ATTR_TRUE(value); } +struct conv_attrs { + struct convert_driver *drv; + enum crlf_action attr_action; /* What attr says */ + enum crlf_action crlf_action; /* When no attr is set, use core.autocrlf */ + int ident; +}; + +static void convert_attrs(struct conv_attrs *ca, const char *path) +{ + static struct attr_check *check; + + if (!check) { + check = attr_check_initl("crlf", "ident", "filter", + "eol", "text", NULL); + user_convert_tail = &user_convert; + git_config(read_convert_config, NULL); + } + + if (!git_check_attr(path, check)) { + struct attr_check_item *ccheck = check->items; + ca->crlf_action = git_path_check_crlf(ccheck + 4); + if (ca->crlf_action == CRLF_UNDEFINED) + ca->crlf_action = git_path_check_crlf(ccheck + 0); + ca->attr_action = ca->crlf_action; + ca->ident = git_path_check_ident(ccheck + 1); + ca->drv = git_path_check_convert(ccheck + 2); + if (ca->crlf_action != CRLF_BINARY) { + enum eol eol_attr = git_path_check_eol(ccheck + 3); + if (ca->crlf_action == CRLF_AUTO && eol_attr == EOL_LF) + ca->crlf_action = CRLF_AUTO_INPUT; + else if (ca->crlf_action == CRLF_AUTO && eol_attr == EOL_CRLF) + ca->crlf_action = CRLF_AUTO_CRLF; + else if (eol_attr == EOL_LF) + ca->crlf_action = CRLF_TEXT_INPUT; + else if (eol_attr == EOL_CRLF) + ca->crlf_action = CRLF_TEXT_CRLF; + } + ca->attr_action = ca->crlf_action; + } else { + ca->drv = NULL; + ca->crlf_action = CRLF_UNDEFINED; + ca->ident = 0; + } + if (ca->crlf_action == CRLF_TEXT) + ca->crlf_action = text_eol_is_crlf() ? CRLF_TEXT_CRLF : CRLF_TEXT_INPUT; + if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_FALSE) + ca->crlf_action = CRLF_BINARY; + if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_TRUE) + ca->crlf_action = CRLF_AUTO_CRLF; + if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_INPUT) + ca->crlf_action = CRLF_AUTO_INPUT; +} + +int would_convert_to_git_filter_fd(const char *path) +{ + struct conv_attrs ca; + + convert_attrs(&ca, path); + if (!ca.drv) + return 0; + + /* + * Apply a filter to an fd only if the filter is required to succeed. + * We must die if the filter fails, because the original data before + * filtering is not available. + */ + if (!ca.drv->required) + return 0; + + return apply_filter(path, NULL, 0, -1, NULL, ca.drv, CAP_CLEAN); +} + +const char *get_convert_attr_ascii(const char *path) +{ + struct conv_attrs ca; + + convert_attrs(&ca, path); + switch (ca.attr_action) { + case CRLF_UNDEFINED: + return ""; + case CRLF_BINARY: + return "-text"; + case CRLF_TEXT: + return "text"; + case CRLF_TEXT_INPUT: + return "text eol=lf"; + case CRLF_TEXT_CRLF: + return "text eol=crlf"; + case CRLF_AUTO: + return "text=auto"; + case CRLF_AUTO_CRLF: + return "text=auto eol=crlf"; + case CRLF_AUTO_INPUT: + return "text=auto eol=lf"; + } + return ""; +} + int convert_to_git(const char *path, const char *src, size_t len, struct strbuf *dst, enum safe_crlf checksafe) { - struct git_attr_check check[3]; - int crlf = CRLF_GUESS; - int ident = 0, ret = 0; - const char *filter = NULL; + int ret = 0; + struct conv_attrs ca; - setup_convert_check(check); - if (!git_checkattr(path, ARRAY_SIZE(check), check)) { - struct convert_driver *drv; - crlf = git_path_check_crlf(path, check + 0); - ident = git_path_check_ident(path, check + 1); - drv = git_path_check_convert(path, check + 2); - if (drv && drv->clean) - filter = drv->clean; - } + convert_attrs(&ca, path); - ret |= apply_filter(path, src, len, dst, filter); - if (ret) { + ret |= apply_filter(path, src, len, -1, dst, ca.drv, CAP_CLEAN); + if (!ret && ca.drv && ca.drv->required) + die("%s: clean filter '%s' failed", path, ca.drv->name); + + if (ret && dst) { src = dst->buf; len = dst->len; } - ret |= crlf_to_git(path, src, len, dst, crlf, checksafe); - if (ret) { + ret |= crlf_to_git(path, src, len, dst, ca.crlf_action, checksafe); + if (ret && dst) { src = dst->buf; len = dst->len; } - return ret | ident_to_git(path, src, len, dst, ident); + return ret | ident_to_git(path, src, len, dst, ca.ident); } -int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst) +void convert_to_git_filter_fd(const char *path, int fd, struct strbuf *dst, + enum safe_crlf checksafe) { - struct git_attr_check check[3]; - int crlf = CRLF_GUESS; - int ident = 0, ret = 0; - const char *filter = NULL; + struct conv_attrs ca; + convert_attrs(&ca, path); - setup_convert_check(check); - if (!git_checkattr(path, ARRAY_SIZE(check), check)) { - struct convert_driver *drv; - crlf = git_path_check_crlf(path, check + 0); - ident = git_path_check_ident(path, check + 1); - drv = git_path_check_convert(path, check + 2); - if (drv && drv->smudge) - filter = drv->smudge; - } + assert(ca.drv); + assert(ca.drv->clean || ca.drv->process); + + if (!apply_filter(path, NULL, 0, fd, dst, ca.drv, CAP_CLEAN)) + die("%s: clean filter '%s' failed", path, ca.drv->name); + + crlf_to_git(path, dst->buf, dst->len, dst, ca.crlf_action, checksafe); + ident_to_git(path, dst->buf, dst->len, dst, ca.ident); +} - ret |= ident_to_worktree(path, src, len, dst, ident); +static int convert_to_working_tree_internal(const char *path, const char *src, + size_t len, struct strbuf *dst, + int normalizing) +{ + int ret = 0, ret_filter = 0; + struct conv_attrs ca; + + convert_attrs(&ca, path); + + ret |= ident_to_worktree(path, src, len, dst, ca.ident); if (ret) { src = dst->buf; len = dst->len; } - ret |= crlf_to_worktree(path, src, len, dst, crlf); + /* + * CRLF conversion can be skipped if normalizing, unless there + * is a smudge or process filter (even if the process filter doesn't + * support smudge). The filters might expect CRLFs. + */ + if ((ca.drv && (ca.drv->smudge || ca.drv->process)) || !normalizing) { + ret |= crlf_to_worktree(path, src, len, dst, ca.crlf_action); + if (ret) { + src = dst->buf; + len = dst->len; + } + } + + ret_filter = apply_filter(path, src, len, -1, dst, ca.drv, CAP_SMUDGE); + if (!ret_filter && ca.drv && ca.drv->required) + die("%s: smudge filter %s failed", path, ca.drv->name); + + return ret | ret_filter; +} + +int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst) +{ + return convert_to_working_tree_internal(path, src, len, dst, 0); +} + +int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst) +{ + int ret = convert_to_working_tree_internal(path, src, len, dst, 1); if (ret) { src = dst->buf; len = dst->len; } - return ret | apply_filter(path, src, len, dst, filter); + return ret | convert_to_git(path, src, len, dst, SAFE_CRLF_RENORMALIZE); +} + +/***************************************************************** + * + * Streaming conversion support + * + *****************************************************************/ + +typedef int (*filter_fn)(struct stream_filter *, + const char *input, size_t *isize_p, + char *output, size_t *osize_p); +typedef void (*free_fn)(struct stream_filter *); + +struct stream_filter_vtbl { + filter_fn filter; + free_fn free; +}; + +struct stream_filter { + struct stream_filter_vtbl *vtbl; +}; + +static int null_filter_fn(struct stream_filter *filter, + const char *input, size_t *isize_p, + char *output, size_t *osize_p) +{ + size_t count; + + if (!input) + return 0; /* we do not keep any states */ + count = *isize_p; + if (*osize_p < count) + count = *osize_p; + if (count) { + memmove(output, input, count); + *isize_p -= count; + *osize_p -= count; + } + return 0; +} + +static void null_free_fn(struct stream_filter *filter) +{ + ; /* nothing -- null instances are shared */ +} + +static struct stream_filter_vtbl null_vtbl = { + null_filter_fn, + null_free_fn, +}; + +static struct stream_filter null_filter_singleton = { + &null_vtbl, +}; + +int is_null_stream_filter(struct stream_filter *filter) +{ + return filter == &null_filter_singleton; +} + + +/* + * LF-to-CRLF filter + */ + +struct lf_to_crlf_filter { + struct stream_filter filter; + unsigned has_held:1; + char held; +}; + +static int lf_to_crlf_filter_fn(struct stream_filter *filter, + const char *input, size_t *isize_p, + char *output, size_t *osize_p) +{ + size_t count, o = 0; + struct lf_to_crlf_filter *lf_to_crlf = (struct lf_to_crlf_filter *)filter; + + /* + * We may be holding onto the CR to see if it is followed by a + * LF, in which case we would need to go to the main loop. + * Otherwise, just emit it to the output stream. + */ + if (lf_to_crlf->has_held && (lf_to_crlf->held != '\r' || !input)) { + output[o++] = lf_to_crlf->held; + lf_to_crlf->has_held = 0; + } + + /* We are told to drain */ + if (!input) { + *osize_p -= o; + return 0; + } + + count = *isize_p; + if (count || lf_to_crlf->has_held) { + size_t i; + int was_cr = 0; + + if (lf_to_crlf->has_held) { + was_cr = 1; + lf_to_crlf->has_held = 0; + } + + for (i = 0; o < *osize_p && i < count; i++) { + char ch = input[i]; + + if (ch == '\n') { + output[o++] = '\r'; + } else if (was_cr) { + /* + * Previous round saw CR and it is not followed + * by a LF; emit the CR before processing the + * current character. + */ + output[o++] = '\r'; + } + + /* + * We may have consumed the last output slot, + * in which case we need to break out of this + * loop; hold the current character before + * returning. + */ + if (*osize_p <= o) { + lf_to_crlf->has_held = 1; + lf_to_crlf->held = ch; + continue; /* break but increment i */ + } + + if (ch == '\r') { + was_cr = 1; + continue; + } + + was_cr = 0; + output[o++] = ch; + } + + *osize_p -= o; + *isize_p -= i; + + if (!lf_to_crlf->has_held && was_cr) { + lf_to_crlf->has_held = 1; + lf_to_crlf->held = '\r'; + } + } + return 0; +} + +static void lf_to_crlf_free_fn(struct stream_filter *filter) +{ + free(filter); +} + +static struct stream_filter_vtbl lf_to_crlf_vtbl = { + lf_to_crlf_filter_fn, + lf_to_crlf_free_fn, +}; + +static struct stream_filter *lf_to_crlf_filter(void) +{ + struct lf_to_crlf_filter *lf_to_crlf = xcalloc(1, sizeof(*lf_to_crlf)); + + lf_to_crlf->filter.vtbl = &lf_to_crlf_vtbl; + return (struct stream_filter *)lf_to_crlf; +} + +/* + * Cascade filter + */ +#define FILTER_BUFFER 1024 +struct cascade_filter { + struct stream_filter filter; + struct stream_filter *one; + struct stream_filter *two; + char buf[FILTER_BUFFER]; + int end, ptr; +}; + +static int cascade_filter_fn(struct stream_filter *filter, + const char *input, size_t *isize_p, + char *output, size_t *osize_p) +{ + struct cascade_filter *cas = (struct cascade_filter *) filter; + size_t filled = 0; + size_t sz = *osize_p; + size_t to_feed, remaining; + + /* + * input -- (one) --> buf -- (two) --> output + */ + while (filled < sz) { + remaining = sz - filled; + + /* do we already have something to feed two with? */ + if (cas->ptr < cas->end) { + to_feed = cas->end - cas->ptr; + if (stream_filter(cas->two, + cas->buf + cas->ptr, &to_feed, + output + filled, &remaining)) + return -1; + cas->ptr += (cas->end - cas->ptr) - to_feed; + filled = sz - remaining; + continue; + } + + /* feed one from upstream and have it emit into our buffer */ + to_feed = input ? *isize_p : 0; + if (input && !to_feed) + break; + remaining = sizeof(cas->buf); + if (stream_filter(cas->one, + input, &to_feed, + cas->buf, &remaining)) + return -1; + cas->end = sizeof(cas->buf) - remaining; + cas->ptr = 0; + if (input) { + size_t fed = *isize_p - to_feed; + *isize_p -= fed; + input += fed; + } + + /* do we know that we drained one completely? */ + if (input || cas->end) + continue; + + /* tell two to drain; we have nothing more to give it */ + to_feed = 0; + remaining = sz - filled; + if (stream_filter(cas->two, + NULL, &to_feed, + output + filled, &remaining)) + return -1; + if (remaining == (sz - filled)) + break; /* completely drained two */ + filled = sz - remaining; + } + *osize_p -= filled; + return 0; +} + +static void cascade_free_fn(struct stream_filter *filter) +{ + struct cascade_filter *cas = (struct cascade_filter *)filter; + free_stream_filter(cas->one); + free_stream_filter(cas->two); + free(filter); +} + +static struct stream_filter_vtbl cascade_vtbl = { + cascade_filter_fn, + cascade_free_fn, +}; + +static struct stream_filter *cascade_filter(struct stream_filter *one, + struct stream_filter *two) +{ + struct cascade_filter *cascade; + + if (!one || is_null_stream_filter(one)) + return two; + if (!two || is_null_stream_filter(two)) + return one; + + cascade = xmalloc(sizeof(*cascade)); + cascade->one = one; + cascade->two = two; + cascade->end = cascade->ptr = 0; + cascade->filter.vtbl = &cascade_vtbl; + return (struct stream_filter *)cascade; +} + +/* + * ident filter + */ +#define IDENT_DRAINING (-1) +#define IDENT_SKIPPING (-2) +struct ident_filter { + struct stream_filter filter; + struct strbuf left; + int state; + char ident[45]; /* ": x40 $" */ +}; + +static int is_foreign_ident(const char *str) +{ + int i; + + if (!skip_prefix(str, "$Id: ", &str)) + return 0; + for (i = 0; str[i]; i++) { + if (isspace(str[i]) && str[i+1] != '$') + return 1; + } + return 0; +} + +static void ident_drain(struct ident_filter *ident, char **output_p, size_t *osize_p) +{ + size_t to_drain = ident->left.len; + + if (*osize_p < to_drain) + to_drain = *osize_p; + if (to_drain) { + memcpy(*output_p, ident->left.buf, to_drain); + strbuf_remove(&ident->left, 0, to_drain); + *output_p += to_drain; + *osize_p -= to_drain; + } + if (!ident->left.len) + ident->state = 0; +} + +static int ident_filter_fn(struct stream_filter *filter, + const char *input, size_t *isize_p, + char *output, size_t *osize_p) +{ + struct ident_filter *ident = (struct ident_filter *)filter; + static const char head[] = "$Id"; + + if (!input) { + /* drain upon eof */ + switch (ident->state) { + default: + strbuf_add(&ident->left, head, ident->state); + case IDENT_SKIPPING: + /* fallthru */ + case IDENT_DRAINING: + ident_drain(ident, &output, osize_p); + } + return 0; + } + + while (*isize_p || (ident->state == IDENT_DRAINING)) { + int ch; + + if (ident->state == IDENT_DRAINING) { + ident_drain(ident, &output, osize_p); + if (!*osize_p) + break; + continue; + } + + ch = *(input++); + (*isize_p)--; + + if (ident->state == IDENT_SKIPPING) { + /* + * Skipping until '$' or LF, but keeping them + * in case it is a foreign ident. + */ + strbuf_addch(&ident->left, ch); + if (ch != '\n' && ch != '$') + continue; + if (ch == '$' && !is_foreign_ident(ident->left.buf)) { + strbuf_setlen(&ident->left, sizeof(head) - 1); + strbuf_addstr(&ident->left, ident->ident); + } + ident->state = IDENT_DRAINING; + continue; + } + + if (ident->state < sizeof(head) && + head[ident->state] == ch) { + ident->state++; + continue; + } + + if (ident->state) + strbuf_add(&ident->left, head, ident->state); + if (ident->state == sizeof(head) - 1) { + if (ch != ':' && ch != '$') { + strbuf_addch(&ident->left, ch); + ident->state = 0; + continue; + } + + if (ch == ':') { + strbuf_addch(&ident->left, ch); + ident->state = IDENT_SKIPPING; + } else { + strbuf_addstr(&ident->left, ident->ident); + ident->state = IDENT_DRAINING; + } + continue; + } + + strbuf_addch(&ident->left, ch); + ident->state = IDENT_DRAINING; + } + return 0; +} + +static void ident_free_fn(struct stream_filter *filter) +{ + struct ident_filter *ident = (struct ident_filter *)filter; + strbuf_release(&ident->left); + free(filter); +} + +static struct stream_filter_vtbl ident_vtbl = { + ident_filter_fn, + ident_free_fn, +}; + +static struct stream_filter *ident_filter(const unsigned char *sha1) +{ + struct ident_filter *ident = xmalloc(sizeof(*ident)); + + xsnprintf(ident->ident, sizeof(ident->ident), + ": %s $", sha1_to_hex(sha1)); + strbuf_init(&ident->left, 0); + ident->filter.vtbl = &ident_vtbl; + ident->state = 0; + return (struct stream_filter *)ident; +} + +/* + * Return an appropriately constructed filter for the path, or NULL if + * the contents cannot be filtered without reading the whole thing + * in-core. + * + * Note that you would be crazy to set CRLF, smuge/clean or ident to a + * large binary blob you would want us not to slurp into the memory! + */ +struct stream_filter *get_stream_filter(const char *path, const unsigned char *sha1) +{ + struct conv_attrs ca; + struct stream_filter *filter = NULL; + + convert_attrs(&ca, path); + if (ca.drv && (ca.drv->process || ca.drv->smudge || ca.drv->clean)) + return NULL; + + if (ca.crlf_action == CRLF_AUTO || ca.crlf_action == CRLF_AUTO_CRLF) + return NULL; + + if (ca.ident) + filter = ident_filter(sha1); + + if (output_eol(ca.crlf_action) == EOL_CRLF) + filter = cascade_filter(filter, lf_to_crlf_filter()); + else + filter = cascade_filter(filter, &null_filter_singleton); + + return filter; +} + +void free_stream_filter(struct stream_filter *filter) +{ + filter->vtbl->free(filter); +} + +int stream_filter(struct stream_filter *filter, + const char *input, size_t *isize_p, + char *output, size_t *osize_p) +{ + return filter->vtbl->filter(filter, input, isize_p, output, osize_p); } |