Merge branch 'bp/sub-process-convert-filter'
[gitweb.git] / builtin / am.c
index 9daeb27225c04c28e33adc7b8e9071d825a490de..0f63dcab1610f111f19b513eea47089132c1c702 100644 (file)
@@ -28,6 +28,7 @@
 #include "rerere.h"
 #include "prompt.h"
 #include "mailinfo.h"
+#include "apply.h"
 #include "string-list.h"
 
 /**
@@ -109,7 +110,7 @@ struct am_state {
        size_t msg_len;
 
        /* when --rebasing, records the original commit the patch came from */
-       unsigned char orig_commit[GIT_SHA1_RAWSZ];
+       struct object_id orig_commit;
 
        /* number of digits in patch filename */
        int prec;
@@ -133,17 +134,15 @@ struct am_state {
 };
 
 /**
- * Initializes am_state with the default values. The state directory is set to
- * dir.
+ * Initializes am_state with the default values.
  */
-static void am_state_init(struct am_state *state, const char *dir)
+static void am_state_init(struct am_state *state)
 {
        int gpgsign;
 
        memset(state, 0, sizeof(*state));
 
-       assert(dir);
-       state->dir = xstrdup(dir);
+       state->dir = git_pathdup("rebase-apply");
 
        state->prec = 4;
 
@@ -415,8 +414,8 @@ static void am_load(struct am_state *state)
        read_commit_msg(state);
 
        if (read_state_file(&sb, state, "original-commit", 1) < 0)
-               hashclr(state->orig_commit);
-       else if (get_sha1_hex(sb.buf, state->orig_commit) < 0)
+               oidclr(&state->orig_commit);
+       else if (get_oid_hex(sb.buf, &state->orig_commit) < 0)
                die(_("could not parse %s"), am_path(state, "original-commit"));
 
        read_state_file(&sb, state, "threeway", 1);
@@ -542,14 +541,14 @@ static int copy_notes_for_rebase(const struct am_state *state)
        fp = xfopen(am_path(state, "rewritten"), "r");
 
        while (!strbuf_getline_lf(&sb, fp)) {
-               unsigned char from_obj[GIT_SHA1_RAWSZ], to_obj[GIT_SHA1_RAWSZ];
+               struct object_id from_obj, to_obj;
 
                if (sb.len != GIT_SHA1_HEXSZ * 2 + 1) {
                        ret = error(invalid_line, sb.buf);
                        goto finish;
                }
 
-               if (get_sha1_hex(sb.buf, from_obj)) {
+               if (get_oid_hex(sb.buf, &from_obj)) {
                        ret = error(invalid_line, sb.buf);
                        goto finish;
                }
@@ -559,14 +558,14 @@ static int copy_notes_for_rebase(const struct am_state *state)
                        goto finish;
                }
 
-               if (get_sha1_hex(sb.buf + GIT_SHA1_HEXSZ + 1, to_obj)) {
+               if (get_oid_hex(sb.buf + GIT_SHA1_HEXSZ + 1, &to_obj)) {
                        ret = error(invalid_line, sb.buf);
                        goto finish;
                }
 
-               if (copy_note_for_rewrite(c, from_obj, to_obj))
+               if (copy_note_for_rewrite(c, from_obj.hash, to_obj.hash))
                        ret = error(_("Failed to copy notes from '%s' to '%s'"),
-                                       sha1_to_hex(from_obj), sha1_to_hex(to_obj));
+                                       oid_to_hex(&from_obj), oid_to_hex(&to_obj));
        }
 
 finish:
@@ -761,14 +760,18 @@ static int split_mail_conv(mail_conv_fn fn, struct am_state *state,
                mail = mkpath("%s/%0*d", state->dir, state->prec, i + 1);
 
                out = fopen(mail, "w");
-               if (!out)
+               if (!out) {
+                       if (in != stdin)
+                               fclose(in);
                        return error_errno(_("could not open '%s' for writing"),
                                           mail);
+               }
 
                ret = fn(out, in, keep_cr);
 
                fclose(out);
-               fclose(in);
+               if (in != stdin)
+                       fclose(in);
 
                if (ret)
                        return error(_("could not parse patch '%s'"), *paths);
@@ -876,12 +879,12 @@ static int hg_patch_to_mail(FILE *out, FILE *in, int keep_cr)
                if (skip_prefix(sb.buf, "# User ", &str))
                        fprintf(out, "From: %s\n", str);
                else if (skip_prefix(sb.buf, "# Date ", &str)) {
-                       unsigned long timestamp;
+                       timestamp_t timestamp;
                        long tz, tz2;
                        char *end;
 
                        errno = 0;
-                       timestamp = strtoul(str, &end, 10);
+                       timestamp = parse_timestamp(str, &end, 10);
                        if (errno)
                                return error(_("invalid timestamp"));
 
@@ -972,7 +975,7 @@ static int split_mail(struct am_state *state, enum patch_format patch_format,
 static void am_setup(struct am_state *state, enum patch_format patch_format,
                        const char **paths, int keep_cr)
 {
-       unsigned char curr_head[GIT_SHA1_RAWSZ];
+       struct object_id curr_head;
        const char *str;
        struct strbuf sb = STRBUF_INIT;
 
@@ -1040,15 +1043,15 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
        else
                write_state_text(state, "applying", "");
 
-       if (!get_sha1("HEAD", curr_head)) {
-               write_state_text(state, "abort-safety", sha1_to_hex(curr_head));
+       if (!get_oid("HEAD", &curr_head)) {
+               write_state_text(state, "abort-safety", oid_to_hex(&curr_head));
                if (!state->rebasing)
-                       update_ref("am", "ORIG_HEAD", curr_head, NULL, 0,
+                       update_ref_oid("am", "ORIG_HEAD", &curr_head, NULL, 0,
                                        UPDATE_REFS_DIE_ON_ERR);
        } else {
                write_state_text(state, "abort-safety", "");
                if (!state->rebasing)
-                       delete_ref("ORIG_HEAD", NULL, 0);
+                       delete_ref(NULL, "ORIG_HEAD", NULL, 0);
        }
 
        /*
@@ -1068,7 +1071,7 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
  */
 static void am_next(struct am_state *state)
 {
-       unsigned char head[GIT_SHA1_RAWSZ];
+       struct object_id head;
 
        free(state->author_name);
        state->author_name = NULL;
@@ -1086,11 +1089,11 @@ static void am_next(struct am_state *state)
        unlink(am_path(state, "author-script"));
        unlink(am_path(state, "final-commit"));
 
-       hashclr(state->orig_commit);
+       oidclr(&state->orig_commit);
        unlink(am_path(state, "original-commit"));
 
-       if (!get_sha1("HEAD", head))
-               write_state_text(state, "abort-safety", sha1_to_hex(head));
+       if (!get_oid("HEAD", &head))
+               write_state_text(state, "abort-safety", oid_to_hex(&head));
        else
                write_state_text(state, "abort-safety", "");
 
@@ -1118,7 +1121,7 @@ static void refresh_and_write_cache(void)
 {
        struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
 
-       hold_locked_index(lock_file, 1);
+       hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
        refresh_cache(REFRESH_QUIET);
        if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
                die(_("unable to write index file"));
@@ -1132,17 +1135,17 @@ static void refresh_and_write_cache(void)
  */
 static int index_has_changes(struct strbuf *sb)
 {
-       unsigned char head[GIT_SHA1_RAWSZ];
+       struct object_id head;
        int i;
 
-       if (!get_sha1_tree("HEAD", head)) {
+       if (!get_sha1_tree("HEAD", head.hash)) {
                struct diff_options opt;
 
                diff_setup(&opt);
                DIFF_OPT_SET(&opt, EXIT_WITH_STATUS);
                if (!sb)
                        DIFF_OPT_SET(&opt, QUICK);
-               do_diff_cache(head, &opt);
+               do_diff_cache(&head, &opt);
                diffcore_std(&opt);
                for (i = 0; sb && i < diff_queued_diff.nr; i++) {
                        if (i)
@@ -1180,42 +1183,39 @@ static void NORETURN die_user_resolve(const struct am_state *state)
        exit(128);
 }
 
-static void am_signoff(struct strbuf *sb)
+/**
+ * Appends signoff to the "msg" field of the am_state.
+ */
+static void am_append_signoff(struct am_state *state)
 {
        char *cp;
        struct strbuf mine = STRBUF_INIT;
+       struct strbuf sb = STRBUF_INIT;
 
-       /* Does it end with our own sign-off? */
+       strbuf_attach(&sb, state->msg, state->msg_len, state->msg_len);
+
+       /* our sign-off */
        strbuf_addf(&mine, "\n%s%s\n",
                    sign_off_header,
                    fmt_name(getenv("GIT_COMMITTER_NAME"),
                             getenv("GIT_COMMITTER_EMAIL")));
-       if (mine.len < sb->len &&
-           !strcmp(mine.buf, sb->buf + sb->len - mine.len))
+
+       /* Does sb end with it already? */
+       if (mine.len < sb.len &&
+           !strcmp(mine.buf, sb.buf + sb.len - mine.len))
                goto exit; /* no need to duplicate */
 
        /* Does it have any Signed-off-by: in the text */
-       for (cp = sb->buf;
+       for (cp = sb.buf;
             cp && *cp && (cp = strstr(cp, sign_off_header)) != NULL;
             cp = strchr(cp, '\n')) {
-               if (sb->buf == cp || cp[-1] == '\n')
+               if (sb.buf == cp || cp[-1] == '\n')
                        break;
        }
 
-       strbuf_addstr(sb, mine.buf + !!cp);
+       strbuf_addstr(&sb, mine.buf + !!cp);
 exit:
        strbuf_release(&mine);
-}
-
-/**
- * Appends signoff to the "msg" field of the am_state.
- */
-static void am_append_signoff(struct am_state *state)
-{
-       struct strbuf sb = STRBUF_INIT;
-
-       strbuf_attach(&sb, state->msg, state->msg_len, state->msg_len);
-       am_signoff(&sb);
        state->msg = strbuf_detach(&sb, &state->msg_len);
 }
 
@@ -1312,7 +1312,7 @@ static int parse_mail(struct am_state *state, const char *mail)
        }
 
        if (is_empty_file(am_path(state, "patch"))) {
-               printf_ln(_("Patch is empty. Was it split wrong?"));
+               printf_ln(_("Patch is empty."));
                die_user_resolve(state);
        }
 
@@ -1320,9 +1320,6 @@ static int parse_mail(struct am_state *state, const char *mail)
        strbuf_addbuf(&msg, &mi.log_message);
        strbuf_stripspace(&msg, 0);
 
-       if (state->signoff)
-               am_signoff(&msg);
-
        assert(!state->author_name);
        state->author_name = strbuf_detach(&author_name, NULL);
 
@@ -1349,24 +1346,21 @@ static int parse_mail(struct am_state *state, const char *mail)
  * Sets commit_id to the commit hash where the mail was generated from.
  * Returns 0 on success, -1 on failure.
  */
-static int get_mail_commit_sha1(unsigned char *commit_id, const char *mail)
+static int get_mail_commit_oid(struct object_id *commit_id, const char *mail)
 {
        struct strbuf sb = STRBUF_INIT;
        FILE *fp = xfopen(mail, "r");
        const char *x;
+       int ret = 0;
 
-       if (strbuf_getline_lf(&sb, fp))
-               return -1;
-
-       if (!skip_prefix(sb.buf, "From ", &x))
-               return -1;
-
-       if (get_sha1_hex(x, commit_id) < 0)
-               return -1;
+       if (strbuf_getline_lf(&sb, fp) ||
+           !skip_prefix(sb.buf, "From ", &x) ||
+           get_oid_hex(x, commit_id) < 0)
+               ret = -1;
 
        strbuf_release(&sb);
        fclose(fp);
-       return 0;
+       return ret;
 }
 
 /**
@@ -1375,40 +1369,33 @@ static int get_mail_commit_sha1(unsigned char *commit_id, const char *mail)
  */
 static void get_commit_info(struct am_state *state, struct commit *commit)
 {
-       const char *buffer, *ident_line, *author_date, *msg;
+       const char *buffer, *ident_line, *msg;
        size_t ident_len;
-       struct ident_split ident_split;
-       struct strbuf sb = STRBUF_INIT;
+       struct ident_split id;
 
        buffer = logmsg_reencode(commit, NULL, get_commit_output_encoding());
 
        ident_line = find_commit_header(buffer, "author", &ident_len);
 
-       if (split_ident_line(&ident_split, ident_line, ident_len) < 0) {
-               strbuf_add(&sb, ident_line, ident_len);
-               die(_("invalid ident line: %s"), sb.buf);
-       }
+       if (split_ident_line(&id, ident_line, ident_len) < 0)
+               die(_("invalid ident line: %.*s"), (int)ident_len, ident_line);
 
        assert(!state->author_name);
-       if (ident_split.name_begin) {
-               strbuf_add(&sb, ident_split.name_begin,
-                       ident_split.name_end - ident_split.name_begin);
-               state->author_name = strbuf_detach(&sb, NULL);
-       } else
+       if (id.name_begin)
+               state->author_name =
+                       xmemdupz(id.name_begin, id.name_end - id.name_begin);
+       else
                state->author_name = xstrdup("");
 
        assert(!state->author_email);
-       if (ident_split.mail_begin) {
-               strbuf_add(&sb, ident_split.mail_begin,
-                       ident_split.mail_end - ident_split.mail_begin);
-               state->author_email = strbuf_detach(&sb, NULL);
-       } else
+       if (id.mail_begin)
+               state->author_email =
+                       xmemdupz(id.mail_begin, id.mail_end - id.mail_begin);
+       else
                state->author_email = xstrdup("");
 
-       author_date = show_ident_date(&ident_split, DATE_MODE(NORMAL));
-       strbuf_addstr(&sb, author_date);
        assert(!state->author_date);
-       state->author_date = strbuf_detach(&sb, NULL);
+       state->author_date = xstrdup(show_ident_date(&id, DATE_MODE(NORMAL)));
 
        assert(!state->msg);
        msg = strstr(buffer, "\n\n");
@@ -1416,6 +1403,7 @@ static void get_commit_info(struct am_state *state, struct commit *commit)
                die(_("unable to parse commit %s"), oid_to_hex(&commit->object.oid));
        state->msg = xstrdup(msg + 2);
        state->msg_len = strlen(state->msg);
+       unuse_commit_buffer(commit, buffer);
 }
 
 /**
@@ -1451,14 +1439,14 @@ static void write_commit_patch(const struct am_state *state, struct commit *comm
 static void write_index_patch(const struct am_state *state)
 {
        struct tree *tree;
-       unsigned char head[GIT_SHA1_RAWSZ];
+       struct object_id head;
        struct rev_info rev_info;
        FILE *fp;
 
-       if (!get_sha1_tree("HEAD", head))
-               tree = lookup_tree(head);
+       if (!get_sha1_tree("HEAD", head.hash))
+               tree = lookup_tree(&head);
        else
-               tree = lookup_tree(EMPTY_TREE_SHA1_BIN);
+               tree = lookup_tree(&empty_tree_oid);
 
        fp = xfopen(am_path(state, "patch"), "w");
        init_revisions(&rev_info, NULL);
@@ -1486,19 +1474,19 @@ static void write_index_patch(const struct am_state *state)
 static int parse_mail_rebase(struct am_state *state, const char *mail)
 {
        struct commit *commit;
-       unsigned char commit_sha1[GIT_SHA1_RAWSZ];
+       struct object_id commit_oid;
 
-       if (get_mail_commit_sha1(commit_sha1, mail) < 0)
+       if (get_mail_commit_oid(&commit_oid, mail) < 0)
                die(_("could not parse %s"), mail);
 
-       commit = lookup_commit_or_die(commit_sha1, mail);
+       commit = lookup_commit_or_die(&commit_oid, mail);
 
        get_commit_info(state, commit);
 
        write_commit_patch(state, commit);
 
-       hashcpy(state->orig_commit, commit_sha1);
-       write_state_text(state, "original-commit", sha1_to_hex(commit_sha1));
+       oidcpy(&state->orig_commit, &commit_oid);
+       write_state_text(state, "original-commit", oid_to_hex(&commit_oid));
 
        return 0;
 }
@@ -1509,39 +1497,59 @@ static int parse_mail_rebase(struct am_state *state, const char *mail)
  */
 static int run_apply(const struct am_state *state, const char *index_file)
 {
-       struct child_process cp = CHILD_PROCESS_INIT;
-
-       cp.git_cmd = 1;
-
-       if (index_file)
-               argv_array_pushf(&cp.env_array, "GIT_INDEX_FILE=%s", index_file);
+       struct argv_array apply_paths = ARGV_ARRAY_INIT;
+       struct argv_array apply_opts = ARGV_ARRAY_INIT;
+       struct apply_state apply_state;
+       int res, opts_left;
+       static struct lock_file lock_file;
+       int force_apply = 0;
+       int options = 0;
+
+       if (init_apply_state(&apply_state, NULL, &lock_file))
+               die("BUG: init_apply_state() failed");
+
+       argv_array_push(&apply_opts, "apply");
+       argv_array_pushv(&apply_opts, state->git_apply_opts.argv);
+
+       opts_left = apply_parse_options(apply_opts.argc, apply_opts.argv,
+                                       &apply_state, &force_apply, &options,
+                                       NULL);
+
+       if (opts_left != 0)
+               die("unknown option passed through to git apply");
+
+       if (index_file) {
+               apply_state.index_file = index_file;
+               apply_state.cached = 1;
+       } else
+               apply_state.check_index = 1;
 
        /*
         * If we are allowed to fall back on 3-way merge, don't give false
         * errors during the initial attempt.
         */
-       if (state->threeway && !index_file) {
-               cp.no_stdout = 1;
-               cp.no_stderr = 1;
-       }
+       if (state->threeway && !index_file)
+               apply_state.apply_verbosity = verbosity_silent;
 
-       argv_array_push(&cp.args, "apply");
+       if (check_apply_state(&apply_state, force_apply))
+               die("BUG: check_apply_state() failed");
 
-       argv_array_pushv(&cp.args, state->git_apply_opts.argv);
+       argv_array_push(&apply_paths, am_path(state, "patch"));
 
-       if (index_file)
-               argv_array_push(&cp.args, "--cached");
-       else
-               argv_array_push(&cp.args, "--index");
+       res = apply_all_patches(&apply_state, apply_paths.argc, apply_paths.argv, options);
 
-       argv_array_push(&cp.args, am_path(state, "patch"));
+       argv_array_clear(&apply_paths);
+       argv_array_clear(&apply_opts);
+       clear_apply_state(&apply_state);
 
-       if (run_command(&cp))
-               return -1;
+       if (res)
+               return res;
 
-       /* Reload index as git-apply will have modified it. */
-       discard_cache();
-       read_cache_from(index_file ? index_file : get_index_file());
+       if (index_file) {
+               /* Reload index as apply_all_patches() will have modified it. */
+               discard_cache();
+               read_cache_from(index_file);
+       }
 
        return 0;
 }
@@ -1601,7 +1609,7 @@ static int fall_back_threeway(const struct am_state *state, const char *index_pa
                init_revisions(&rev_info, NULL);
                rev_info.diffopt.output_format = DIFF_FORMAT_NAME_STATUS;
                diff_opt_parse(&rev_info.diffopt, &diff_filter_str, 1, rev_info.prefix);
-               add_pending_sha1(&rev_info, "HEAD", our_tree.hash, 0);
+               add_pending_oid(&rev_info, "HEAD", &our_tree, 0);
                diff_setup_done(&rev_info.diffopt);
                run_diff_index(&rev_info, 1);
        }
@@ -1652,9 +1660,8 @@ static int fall_back_threeway(const struct am_state *state, const char *index_pa
  */
 static void do_commit(const struct am_state *state)
 {
-       unsigned char tree[GIT_SHA1_RAWSZ], parent[GIT_SHA1_RAWSZ],
-                     commit[GIT_SHA1_RAWSZ];
-       unsigned char *ptr;
+       struct object_id tree, parent, commit;
+       const struct object_id *old_oid;
        struct commit_list *parents = NULL;
        const char *reflog_msg, *author;
        struct strbuf sb = STRBUF_INIT;
@@ -1662,14 +1669,14 @@ static void do_commit(const struct am_state *state)
        if (run_hook_le(NULL, "pre-applypatch", NULL))
                exit(1);
 
-       if (write_cache_as_tree(tree, 0, NULL))
+       if (write_cache_as_tree(tree.hash, 0, NULL))
                die(_("git write-tree failed to write a tree"));
 
-       if (!get_sha1_commit("HEAD", parent)) {
-               ptr = parent;
-               commit_list_insert(lookup_commit(parent), &parents);
+       if (!get_sha1_commit("HEAD", parent.hash)) {
+               old_oid = &parent;
+               commit_list_insert(lookup_commit(&parent), &parents);
        } else {
-               ptr = NULL;
+               old_oid = NULL;
                say(state, stderr, _("applying to an empty history"));
        }
 
@@ -1681,7 +1688,7 @@ static void do_commit(const struct am_state *state)
                setenv("GIT_COMMITTER_DATE",
                        state->ignore_date ? "" : state->author_date, 1);
 
-       if (commit_tree(state->msg, state->msg_len, tree, parents, commit,
+       if (commit_tree(state->msg, state->msg_len, tree.hash, parents, commit.hash,
                                author, state->sign_commit))
                die(_("failed to write commit object"));
 
@@ -1692,14 +1699,15 @@ static void do_commit(const struct am_state *state)
        strbuf_addf(&sb, "%s: %.*s", reflog_msg, linelen(state->msg),
                        state->msg);
 
-       update_ref(sb.buf, "HEAD", commit, ptr, 0, UPDATE_REFS_DIE_ON_ERR);
+       update_ref_oid(sb.buf, "HEAD", &commit, old_oid, 0,
+                       UPDATE_REFS_DIE_ON_ERR);
 
        if (state->rebasing) {
                FILE *fp = xfopen(am_path(state, "rewritten"), "a");
 
-               assert(!is_null_sha1(state->orig_commit));
-               fprintf(fp, "%s ", sha1_to_hex(state->orig_commit));
-               fprintf(fp, "%s\n", sha1_to_hex(commit));
+               assert(!is_null_oid(&state->orig_commit));
+               fprintf(fp, "%s ", oid_to_hex(&state->orig_commit));
+               fprintf(fp, "%s\n", oid_to_hex(&commit));
                fclose(fp);
        }
 
@@ -1827,6 +1835,9 @@ static void am_run(struct am_state *state, int resume)
                        if (skip)
                                goto next; /* mail should be skipped */
 
+                       if (state->signoff)
+                               am_append_signoff(state);
+
                        write_author_script(state);
                        write_commit_msg(state);
                }
@@ -1920,7 +1931,8 @@ static void am_resolve(struct am_state *state)
 
        if (unmerged_cache()) {
                printf_ln(_("You still have unmerged paths in your index.\n"
-                       "Did you forget to use 'git add'?"));
+                       "You should 'git add' each file with resolved conflicts to mark them as such.\n"
+                       "You might run `git rm` on a file to accept \"deleted by them\" for it."));
                die_user_resolve(state);
        }
 
@@ -1955,7 +1967,7 @@ static int fast_forward_to(struct tree *head, struct tree *remote, int reset)
                return -1;
 
        lock_file = xcalloc(1, sizeof(struct lock_file));
-       hold_locked_index(lock_file, 1);
+       hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
 
        refresh_cache(REFRESH_QUIET);
 
@@ -1995,7 +2007,7 @@ static int merge_tree(struct tree *tree)
                return -1;
 
        lock_file = xcalloc(1, sizeof(struct lock_file));
-       hold_locked_index(lock_file, 1);
+       hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
 
        memset(&opts, 0, sizeof(opts));
        opts.head_idx = 1;
@@ -2020,30 +2032,30 @@ static int merge_tree(struct tree *tree)
  * Clean the index without touching entries that are not modified between
  * `head` and `remote`.
  */
-static int clean_index(const unsigned char *head, const unsigned char *remote)
+static int clean_index(const struct object_id *head, const struct object_id *remote)
 {
        struct tree *head_tree, *remote_tree, *index_tree;
-       unsigned char index[GIT_SHA1_RAWSZ];
+       struct object_id index;
 
        head_tree = parse_tree_indirect(head);
        if (!head_tree)
-               return error(_("Could not parse object '%s'."), sha1_to_hex(head));
+               return error(_("Could not parse object '%s'."), oid_to_hex(head));
 
        remote_tree = parse_tree_indirect(remote);
        if (!remote_tree)
-               return error(_("Could not parse object '%s'."), sha1_to_hex(remote));
+               return error(_("Could not parse object '%s'."), oid_to_hex(remote));
 
        read_cache_unmerged();
 
        if (fast_forward_to(head_tree, head_tree, 1))
                return -1;
 
-       if (write_cache_as_tree(index, 0, NULL))
+       if (write_cache_as_tree(index.hash, 0, NULL))
                return -1;
 
-       index_tree = parse_tree_indirect(index);
+       index_tree = parse_tree_indirect(&index);
        if (!index_tree)
-               return error(_("Could not parse object '%s'."), sha1_to_hex(index));
+               return error(_("Could not parse object '%s'."), oid_to_hex(&index));
 
        if (fast_forward_to(index_tree, remote_tree, 0))
                return -1;
@@ -2071,14 +2083,14 @@ static void am_rerere_clear(void)
  */
 static void am_skip(struct am_state *state)
 {
-       unsigned char head[GIT_SHA1_RAWSZ];
+       struct object_id head;
 
        am_rerere_clear();
 
-       if (get_sha1("HEAD", head))
-               hashcpy(head, EMPTY_TREE_SHA1_BIN);
+       if (get_oid("HEAD", &head))
+               hashcpy(head.hash, EMPTY_TREE_SHA1_BIN);
 
-       if (clean_index(head, head))
+       if (clean_index(&head, &head))
                die(_("failed to clean index"));
 
        am_next(state);
@@ -2096,24 +2108,24 @@ static void am_skip(struct am_state *state)
 static int safe_to_abort(const struct am_state *state)
 {
        struct strbuf sb = STRBUF_INIT;
-       unsigned char abort_safety[GIT_SHA1_RAWSZ], head[GIT_SHA1_RAWSZ];
+       struct object_id abort_safety, head;
 
        if (file_exists(am_path(state, "dirtyindex")))
                return 0;
 
        if (read_state_file(&sb, state, "abort-safety", 1) > 0) {
-               if (get_sha1_hex(sb.buf, abort_safety))
-                       die(_("could not parse %s"), am_path(state, "abort_safety"));
+               if (get_oid_hex(sb.buf, &abort_safety))
+                       die(_("could not parse %s"), am_path(state, "abort-safety"));
        } else
-               hashclr(abort_safety);
+               oidclr(&abort_safety);
 
-       if (get_sha1("HEAD", head))
-               hashclr(head);
+       if (get_oid("HEAD", &head))
+               oidclr(&head);
 
-       if (!hashcmp(head, abort_safety))
+       if (!oidcmp(&head, &abort_safety))
                return 1;
 
-       error(_("You seem to have moved HEAD since the last 'am' failure.\n"
+       warning(_("You seem to have moved HEAD since the last 'am' failure.\n"
                "Not rewinding to ORIG_HEAD"));
 
        return 0;
@@ -2124,7 +2136,7 @@ static int safe_to_abort(const struct am_state *state)
  */
 static void am_abort(struct am_state *state)
 {
-       unsigned char curr_head[GIT_SHA1_RAWSZ], orig_head[GIT_SHA1_RAWSZ];
+       struct object_id curr_head, orig_head;
        int has_curr_head, has_orig_head;
        char *curr_branch;
 
@@ -2135,23 +2147,23 @@ static void am_abort(struct am_state *state)
 
        am_rerere_clear();
 
-       curr_branch = resolve_refdup("HEAD", 0, curr_head, NULL);
-       has_curr_head = !is_null_sha1(curr_head);
+       curr_branch = resolve_refdup("HEAD", 0, curr_head.hash, NULL);
+       has_curr_head = curr_branch && !is_null_oid(&curr_head);
        if (!has_curr_head)
-               hashcpy(curr_head, EMPTY_TREE_SHA1_BIN);
+               hashcpy(curr_head.hash, EMPTY_TREE_SHA1_BIN);
 
-       has_orig_head = !get_sha1("ORIG_HEAD", orig_head);
+       has_orig_head = !get_oid("ORIG_HEAD", &orig_head);
        if (!has_orig_head)
-               hashcpy(orig_head, EMPTY_TREE_SHA1_BIN);
+               hashcpy(orig_head.hash, EMPTY_TREE_SHA1_BIN);
 
-       clean_index(curr_head, orig_head);
+       clean_index(&curr_head, &orig_head);
 
        if (has_orig_head)
-               update_ref("am --abort", "HEAD", orig_head,
-                               has_curr_head ? curr_head : NULL, 0,
+               update_ref_oid("am --abort", "HEAD", &orig_head,
+                               has_curr_head ? &curr_head : NULL, 0,
                                UPDATE_REFS_DIE_ON_ERR);
        else if (curr_branch)
-               delete_ref(curr_branch, NULL, REF_NODEREF);
+               delete_ref(NULL, curr_branch, NULL, REF_NODEREF);
 
        free(curr_branch);
        am_destroy(state);
@@ -2301,7 +2313,7 @@ int cmd_am(int argc, const char **argv, const char *prefix)
 
        git_config(git_am_config, NULL);
 
-       am_state_init(&state, git_path("rebase-apply"));
+       am_state_init(&state);
 
        in_progress = am_in_progress(&state);
        if (in_progress)