apply: add --intent-to-add
[gitweb.git] / apply.c
diff --git a/apply.c b/apply.c
index f8b67bfee2c39cc3fbebb7a3c72dfb9cb4fcb56f..899c5cc0ac846f8ba9634b21028557ff3412f2f5 100644 (file)
--- a/apply.c
+++ b/apply.c
@@ -141,6 +141,8 @@ int check_apply_state(struct apply_state *state, int force_apply)
                        return error(_("--cached outside a repository"));
                state->check_index = 1;
        }
+       if (state->ita_only && (state->check_index || is_not_gitdir))
+               state->ita_only = 0;
        if (state->check_index)
                state->unsafe_paths = 0;
 
@@ -950,7 +952,7 @@ static int gitdiff_verify_name(struct apply_state *state,
                }
                free(another);
        } else {
-               if (!starts_with(line, "/dev/null\n"))
+               if (!is_dev_null(line))
                        return error(_("git apply: bad git-diff - expected /dev/null on line %d"), state->linenr);
        }
 
@@ -2301,7 +2303,7 @@ static void update_pre_post_images(struct image *preimage,
                                   size_t len, size_t postlen)
 {
        int i, ctx, reduced;
-       char *new, *old, *fixed;
+       char *new_buf, *old_buf, *fixed;
        struct image fixed_preimage;
 
        /*
@@ -2327,25 +2329,25 @@ static void update_pre_post_images(struct image *preimage,
         * We trust the caller to tell us if the update can be done
         * in place (postlen==0) or not.
         */
-       old = postimage->buf;
+       old_buf = postimage->buf;
        if (postlen)
-               new = postimage->buf = xmalloc(postlen);
+               new_buf = postimage->buf = xmalloc(postlen);
        else
-               new = old;
+               new_buf = old_buf;
        fixed = preimage->buf;
 
        for (i = reduced = ctx = 0; i < postimage->nr; i++) {
                size_t l_len = postimage->line[i].len;
                if (!(postimage->line[i].flag & LINE_COMMON)) {
                        /* an added line -- no counterparts in preimage */
-                       memmove(new, old, l_len);
-                       old += l_len;
-                       new += l_len;
+                       memmove(new_buf, old_buf, l_len);
+                       old_buf += l_len;
+                       new_buf += l_len;
                        continue;
                }
 
                /* a common context -- skip it in the original postimage */
-               old += l_len;
+               old_buf += l_len;
 
                /* and find the corresponding one in the fixed preimage */
                while (ctx < preimage->nr &&
@@ -2365,29 +2367,29 @@ static void update_pre_post_images(struct image *preimage,
 
                /* and copy it in, while fixing the line length */
                l_len = preimage->line[ctx].len;
-               memcpy(new, fixed, l_len);
-               new += l_len;
+               memcpy(new_buf, fixed, l_len);
+               new_buf += l_len;
                fixed += l_len;
                postimage->line[i].len = l_len;
                ctx++;
        }
 
        if (postlen
-           ? postlen < new - postimage->buf
-           : postimage->len < new - postimage->buf)
+           ? postlen < new_buf - postimage->buf
+           : postimage->len < new_buf - postimage->buf)
                die("BUG: caller miscounted postlen: asked %d, orig = %d, used = %d",
-                   (int)postlen, (int) postimage->len, (int)(new - postimage->buf));
+                   (int)postlen, (int) postimage->len, (int)(new_buf - postimage->buf));
 
        /* Fix the length of the whole thing */
-       postimage->len = new - postimage->buf;
+       postimage->len = new_buf - postimage->buf;
        postimage->nr -= reduced;
 }
 
 static int line_by_line_fuzzy_match(struct image *img,
                                    struct image *preimage,
                                    struct image *postimage,
-                                   unsigned long try,
-                                   int try_lno,
+                                   unsigned long current,
+                                   int current_lno,
                                    int preimage_limit)
 {
        int i;
@@ -2404,9 +2406,9 @@ static int line_by_line_fuzzy_match(struct image *img,
 
        for (i = 0; i < preimage_limit; i++) {
                size_t prelen = preimage->line[i].len;
-               size_t imglen = img->line[try_lno+i].len;
+               size_t imglen = img->line[current_lno+i].len;
 
-               if (!fuzzy_matchlines(img->buf + try + imgoff, imglen,
+               if (!fuzzy_matchlines(img->buf + current + imgoff, imglen,
                                      preimage->buf + preoff, prelen))
                        return 0;
                if (preimage->line[i].flag & LINE_COMMON)
@@ -2443,7 +2445,7 @@ static int line_by_line_fuzzy_match(struct image *img,
         */
        extra_chars = preimage_end - preimage_eof;
        strbuf_init(&fixed, imgoff + extra_chars);
-       strbuf_add(&fixed, img->buf + try, imgoff);
+       strbuf_add(&fixed, img->buf + current, imgoff);
        strbuf_add(&fixed, preimage_eof, extra_chars);
        fixed_buf = strbuf_detach(&fixed, &fixed_len);
        update_pre_post_images(preimage, postimage,
@@ -2455,8 +2457,8 @@ static int match_fragment(struct apply_state *state,
                          struct image *img,
                          struct image *preimage,
                          struct image *postimage,
-                         unsigned long try,
-                         int try_lno,
+                         unsigned long current,
+                         int current_lno,
                          unsigned ws_rule,
                          int match_beginning, int match_end)
 {
@@ -2466,12 +2468,12 @@ static int match_fragment(struct apply_state *state,
        size_t fixed_len, postlen;
        int preimage_limit;
 
-       if (preimage->nr + try_lno <= img->nr) {
+       if (preimage->nr + current_lno <= img->nr) {
                /*
                 * The hunk falls within the boundaries of img.
                 */
                preimage_limit = preimage->nr;
-               if (match_end && (preimage->nr + try_lno != img->nr))
+               if (match_end && (preimage->nr + current_lno != img->nr))
                        return 0;
        } else if (state->ws_error_action == correct_ws_error &&
                   (ws_rule & WS_BLANK_AT_EOF)) {
@@ -2482,7 +2484,7 @@ static int match_fragment(struct apply_state *state,
                 * match with img, and the remainder of the preimage
                 * must be blank.
                 */
-               preimage_limit = img->nr - try_lno;
+               preimage_limit = img->nr - current_lno;
        } else {
                /*
                 * The hunk extends beyond the end of the img and
@@ -2492,27 +2494,27 @@ static int match_fragment(struct apply_state *state,
                return 0;
        }
 
-       if (match_beginning && try_lno)
+       if (match_beginning && current_lno)
                return 0;
 
        /* Quick hash check */
        for (i = 0; i < preimage_limit; i++)
-               if ((img->line[try_lno + i].flag & LINE_PATCHED) ||
-                   (preimage->line[i].hash != img->line[try_lno + i].hash))
+               if ((img->line[current_lno + i].flag & LINE_PATCHED) ||
+                   (preimage->line[i].hash != img->line[current_lno + i].hash))
                        return 0;
 
        if (preimage_limit == preimage->nr) {
                /*
                 * Do we have an exact match?  If we were told to match
-                * at the end, size must be exactly at try+fragsize,
-                * otherwise try+fragsize must be still within the preimage,
+                * at the end, size must be exactly at current+fragsize,
+                * otherwise current+fragsize must be still within the preimage,
                 * and either case, the old piece should match the preimage
                 * exactly.
                 */
                if ((match_end
-                    ? (try + preimage->len == img->len)
-                    : (try + preimage->len <= img->len)) &&
-                   !memcmp(img->buf + try, preimage->buf, preimage->len))
+                    ? (current + preimage->len == img->len)
+                    : (current + preimage->len <= img->len)) &&
+                   !memcmp(img->buf + current, preimage->buf, preimage->len))
                        return 1;
        } else {
                /*
@@ -2543,7 +2545,7 @@ static int match_fragment(struct apply_state *state,
         */
        if (state->ws_ignore_action == ignore_ws_change)
                return line_by_line_fuzzy_match(img, preimage, postimage,
-                                               try, try_lno, preimage_limit);
+                                               current, current_lno, preimage_limit);
 
        if (state->ws_error_action != correct_ws_error)
                return 0;
@@ -2577,10 +2579,10 @@ static int match_fragment(struct apply_state *state,
         */
        strbuf_init(&fixed, preimage->len + 1);
        orig = preimage->buf;
-       target = img->buf + try;
+       target = img->buf + current;
        for (i = 0; i < preimage_limit; i++) {
                size_t oldlen = preimage->line[i].len;
-               size_t tgtlen = img->line[try_lno + i].len;
+               size_t tgtlen = img->line[current_lno + i].len;
                size_t fixstart = fixed.len;
                struct strbuf tgtfix;
                int match;
@@ -2666,8 +2668,8 @@ static int find_pos(struct apply_state *state,
                    int match_beginning, int match_end)
 {
        int i;
-       unsigned long backwards, forwards, try;
-       int backwards_lno, forwards_lno, try_lno;
+       unsigned long backwards, forwards, current;
+       int backwards_lno, forwards_lno, current_lno;
 
        /*
         * If match_beginning or match_end is specified, there is no
@@ -2687,25 +2689,25 @@ static int find_pos(struct apply_state *state,
        if ((size_t) line > img->nr)
                line = img->nr;
 
-       try = 0;
+       current = 0;
        for (i = 0; i < line; i++)
-               try += img->line[i].len;
+               current += img->line[i].len;
 
        /*
         * There's probably some smart way to do this, but I'll leave
         * that to the smart and beautiful people. I'm simple and stupid.
         */
-       backwards = try;
+       backwards = current;
        backwards_lno = line;
-       forwards = try;
+       forwards = current;
        forwards_lno = line;
-       try_lno = line;
+       current_lno = line;
 
        for (i = 0; ; i++) {
                if (match_fragment(state, img, preimage, postimage,
-                                  try, try_lno, ws_rule,
+                                  current, current_lno, ws_rule,
                                   match_beginning, match_end))
-                       return try_lno;
+                       return current_lno;
 
        again:
                if (backwards_lno == 0 && forwards_lno == img->nr)
@@ -2718,8 +2720,8 @@ static int find_pos(struct apply_state *state,
                        }
                        backwards_lno--;
                        backwards -= img->line[backwards_lno].len;
-                       try = backwards;
-                       try_lno = backwards_lno;
+                       current = backwards;
+                       current_lno = backwards_lno;
                } else {
                        if (forwards_lno == img->nr) {
                                i++;
@@ -2727,8 +2729,8 @@ static int find_pos(struct apply_state *state,
                        }
                        forwards += img->line[forwards_lno].len;
                        forwards_lno++;
-                       try = forwards;
-                       try_lno = forwards_lno;
+                       current = forwards;
+                       current_lno = forwards_lno;
                }
 
        }
@@ -3154,7 +3156,7 @@ static int apply_binary(struct apply_state *state,
                 * See if the old one matches what the patch
                 * applies to.
                 */
-               hash_sha1_file(img->buf, img->len, blob_type, oid.hash);
+               hash_object_file(img->buf, img->len, blob_type, &oid);
                if (strcmp(oid_to_hex(&oid), patch->old_sha1_prefix))
                        return error(_("the patch applies to '%s' (%s), "
                                       "which does not match the "
@@ -3180,7 +3182,7 @@ static int apply_binary(struct apply_state *state,
                unsigned long size;
                char *result;
 
-               result = read_sha1_file(oid.hash, &type, &size);
+               result = read_object_file(&oid, &type, &size);
                if (!result)
                        return error(_("the necessary postimage %s for "
                                       "'%s' cannot be read"),
@@ -3199,7 +3201,7 @@ static int apply_binary(struct apply_state *state,
                                     name);
 
                /* verify that the result matches */
-               hash_sha1_file(img->buf, img->len, blob_type, oid.hash);
+               hash_object_file(img->buf, img->len, blob_type, &oid);
                if (strcmp(oid_to_hex(&oid), patch->new_sha1_prefix))
                        return error(_("binary patch to '%s' creates incorrect result (expecting %s, got %s)"),
                                name, patch->new_sha1_prefix, oid_to_hex(&oid));
@@ -3242,7 +3244,7 @@ static int read_blob_object(struct strbuf *buf, const struct object_id *oid, uns
                unsigned long sz;
                char *result;
 
-               result = read_sha1_file(oid->hash, &type, &sz);
+               result = read_object_file(oid, &type, &sz);
                if (!result)
                        return -1;
                /* XXX read_sha1_file NUL-terminates */
@@ -3554,7 +3556,7 @@ static int try_threeway(struct apply_state *state,
 
        /* Preimage the patch was prepared for */
        if (patch->is_new)
-               write_sha1_file("", 0, blob_type, pre_oid.hash);
+               write_object_file("", 0, blob_type, &pre_oid);
        else if (get_oid(patch->old_sha1_prefix, &pre_oid) ||
                 read_blob_object(&buf, &pre_oid, patch->old_mode))
                return error(_("repository lacks the necessary blob to fall back on 3-way merge."));
@@ -3570,7 +3572,7 @@ static int try_threeway(struct apply_state *state,
                return -1;
        }
        /* post_oid is theirs */
-       write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, post_oid.hash);
+       write_object_file(tmp_image.buf, tmp_image.len, blob_type, &post_oid);
        clear_image(&tmp_image);
 
        /* our_oid is ours */
@@ -3583,7 +3585,7 @@ static int try_threeway(struct apply_state *state,
                        return error(_("cannot read the current contents of '%s'"),
                                     patch->old_name);
        }
-       write_sha1_file(tmp_image.buf, tmp_image.len, blob_type, our_oid.hash);
+       write_object_file(tmp_image.buf, tmp_image.len, blob_type, &our_oid);
        clear_image(&tmp_image);
 
        /* in-core three-way merge between post and our using pre as base */
@@ -4163,30 +4165,30 @@ static void show_mode_change(struct patch *p, int show_name)
 static void show_rename_copy(struct patch *p)
 {
        const char *renamecopy = p->is_rename ? "rename" : "copy";
-       const char *old, *new;
+       const char *old_name, *new_name;
 
        /* Find common prefix */
-       old = p->old_name;
-       new = p->new_name;
+       old_name = p->old_name;
+       new_name = p->new_name;
        while (1) {
                const char *slash_old, *slash_new;
-               slash_old = strchr(old, '/');
-               slash_new = strchr(new, '/');
+               slash_old = strchr(old_name, '/');
+               slash_new = strchr(new_name, '/');
                if (!slash_old ||
                    !slash_new ||
-                   slash_old - old != slash_new - new ||
-                   memcmp(old, new, slash_new - new))
+                   slash_old - old_name != slash_new - new_name ||
+                   memcmp(old_name, new_name, slash_new - new_name))
                        break;
-               old = slash_old + 1;
-               new = slash_new + 1;
+               old_name = slash_old + 1;
+               new_name = slash_new + 1;
        }
-       /* p->old_name thru old is the common prefix, and old and new
+       /* p->old_name thru old_name is the common prefix, and old_name and new_name
         * through the end of names are renames
         */
-       if (old != p->old_name)
+       if (old_name != p->old_name)
                printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
-                      (int)(old - p->old_name), p->old_name,
-                      old, new, p->score);
+                      (int)(old_name - p->old_name), p->old_name,
+                      old_name, new_name, p->score);
        else
                printf(" %s %s => %s (%d%%)\n", renamecopy,
                       p->old_name, p->new_name, p->score);
@@ -4242,7 +4244,7 @@ static void patch_stats(struct apply_state *state, struct patch *patch)
 
 static int remove_file(struct apply_state *state, struct patch *patch, int rmdir_empty)
 {
-       if (state->update_index) {
+       if (state->update_index && !state->ita_only) {
                if (remove_file_from_cache(patch->old_name) < 0)
                        return error(_("unable to remove %s from index"), patch->old_name);
        }
@@ -4265,15 +4267,15 @@ static int add_index_file(struct apply_state *state,
        int namelen = strlen(path);
        unsigned ce_size = cache_entry_size(namelen);
 
-       if (!state->update_index)
-               return 0;
-
        ce = xcalloc(1, ce_size);
        memcpy(ce->name, path, namelen);
        ce->ce_mode = create_ce_mode(mode);
        ce->ce_flags = create_ce_flags(0);
        ce->ce_namelen = namelen;
-       if (S_ISGITLINK(mode)) {
+       if (state->ita_only) {
+               ce->ce_flags |= CE_INTENT_TO_ADD;
+               set_object_name_for_intent_to_add_entry(ce);
+       } else if (S_ISGITLINK(mode)) {
                const char *s;
 
                if (!skip_prefix(buf, "Subproject commit ", &s) ||
@@ -4291,7 +4293,7 @@ static int add_index_file(struct apply_state *state,
                        }
                        fill_stat_cache_info(ce, &st);
                }
-               if (write_sha1_file(buf, size, blob_type, ce->oid.hash) < 0) {
+               if (write_object_file(buf, size, blob_type, &ce->oid) < 0) {
                        free(ce);
                        return error(_("unable to create backing store "
                                       "for newly created file %s"), path);
@@ -4465,8 +4467,9 @@ static int create_file(struct apply_state *state, struct patch *patch)
 
        if (patch->conflicted_threeway)
                return add_conflicted_stages_file(state, patch);
-       else
+       else if (state->update_index)
                return add_index_file(state, path, mode, buf, size);
+       return 0;
 }
 
 /* phase zero is to remove, phase one is to create */
@@ -4686,7 +4689,7 @@ static int apply_patch(struct apply_state *state,
        if (state->whitespace_error && (state->ws_error_action == die_on_ws_error))
                state->apply = 0;
 
-       state->update_index = state->check_index && state->apply;
+       state->update_index = (state->check_index || state->ita_only) && state->apply;
        if (state->update_index && !is_lock_file_locked(&state->lock_file)) {
                if (state->index_file)
                        hold_lock_file_for_update(&state->lock_file,
@@ -4941,10 +4944,13 @@ int apply_parse_options(int argc, const char **argv,
                        N_("instead of applying the patch, see if the patch is applicable")),
                OPT_BOOL(0, "index", &state->check_index,
                        N_("make sure the patch is applicable to the current index")),
+               OPT_BOOL('N', "intent-to-add", &state->ita_only,
+                       N_("mark new files with `git add --intent-to-add`")),
                OPT_BOOL(0, "cached", &state->cached,
                        N_("apply a patch without touching the working tree")),
-               OPT_BOOL(0, "unsafe-paths", &state->unsafe_paths,
-                       N_("accept a patch that touches outside the working area")),
+               OPT_BOOL_F(0, "unsafe-paths", &state->unsafe_paths,
+                          N_("accept a patch that touches outside the working area"),
+                          PARSE_OPT_NOCOMPLETE),
                OPT_BOOL(0, "apply", force_apply,
                        N_("also apply the patch (use with --stat/--summary/--check)")),
                OPT_BOOL('3', "3way", &state->threeway,