[PATCH v4 5/5] ref-filter: get_ref_atom_value() error handling
- From
Olga Telezhnaya <olyatelezhnaya@gmail.com>
- Date
- Mar 20, 2018, 16:05 UTC
- Message-ID
- <010201624428199f-b4b3d8ce-222f-4966-9171-7fcf932ca220-000000@eu-west-1.amazonses.com>
- In-Reply-To
- <01020162442818b4-c153f9ce-3813-41a6-aebd-f5cb2b98b1fa-000000@eu-west-1.amazonses.com>
Finish removing die() calls from ref-filter formatting logic, so that it could be used by other commands.
Change the signature of get_ref_atom_value() and underlying functions by adding return value and strbuf parameter for error message. Return value equals 0 upon success and -1 upon failure (there could be more error codes further if necessary). Upon failure, error message is appended to the strbuf.
Signed-off-by: Olga Telezhnaia <olyatelezhnaya@gmail.com> --- ref-filter.c | 55 ++++++++++++++++++++++++++++++++++++------------------- 1 file changed, 36 insertions(+), 19 deletions(-)
diff --git a/ref-filter.c b/ref-filter.c index b90cec1056954..85f971663a4aa 100644 --- a/ref-filter.c +++ b/ref-filter.c @@ -1445,28 +1445,36 @@ static const char *get_refname(struct used_atom *atom, struct ref_array_item *re return show_ref(&atom->u.refname, ref->refname); } -static void get_object(struct ref_array_item *ref, const struct object_id *oid, - int deref, struct object **obj) +static int get_object(struct ref_array_item *ref, const struct object_id *oid, + int deref, struct object **obj, struct strbuf *err) { int eaten; unsigned long size; void *buf = get_obj(oid, obj, &size, &eaten); - if (!buf) - die(_("missing object %s for %s"), - oid_to_hex(oid), ref->refname); - if (!*obj) - die(_("parse_object_buffer failed on %s for %s"), - oid_to_hex(oid), ref->refname); - + if (!buf) { + strbuf_addf(err, _("missing object %s for %s"), oid_to_hex(oid), + ref->refname); + if (!eaten) + free(buf); + return -1; + } + if (!*obj) { + strbuf_addf(err, _("parse_object_buffer failed on %s for %s"), + oid_to_hex(oid), ref->refname); + if (!eaten) + free(buf); + return -1; + } grab_values(ref->value, deref, *obj, buf, size); if (!eaten) free(buf); + return 0; } /* * Parse the object referred by ref, and grab needed value. */ -static void populate_value(struct ref_array_item *ref) +static int populate_value(struct ref_array_item *ref, struct strbuf *err) { struct object *obj; int i; @@ -1588,16 +1596,17 @@ static void populate_value(struct ref_array_item *ref) break; } if (used_atom_cnt <= i) - return; + return 0; - get_object(ref, &ref->objectname, 0, &obj); + if (get_object(ref, &ref->objectname, 0, &obj, err)) + return -1; /* * If there is no atom that wants to know about tagged * object, we are done. */ if (!need_tagged || (obj->type != OBJ_TAG)) - return; + return 0; /* * If it is a tag object, see if we use a value that derefs @@ -1611,20 +1620,23 @@ static void populate_value(struct ref_array_item *ref) * is not consistent with what deref_tag() does * which peels the onion to the core. */ - get_object(ref, tagged, 1, &obj); + return get_object(ref, tagged, 1, &obj, err); } /* * Given a ref, return the value for the atom. This lazily gets value * out of the object by calling populate value. */ -static void get_ref_atom_value(struct ref_array_item *ref, int atom, struct atom_value **v) +static int get_ref_atom_value(struct ref_array_item *ref, int atom, + struct atom_value **v, struct strbuf *err) { if (!ref->value) { - populate_value(ref); + if (populate_value(ref, err)) + return -1; fill_missing_values(ref->value); } *v = &ref->value[atom]; + return 0; } /* @@ -2148,9 +2160,13 @@ static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, stru int cmp; cmp_type cmp_type = used_atom[s->atom].type; int (*cmp_fn)(const char *, const char *); + struct strbuf err = STRBUF_INIT; - get_ref_atom_value(a, s->atom, &va); - get_ref_atom_value(b, s->atom, &vb); + if (get_ref_atom_value(a, s->atom, &va, &err)) + die("%s", err.buf); + if (get_ref_atom_value(b, s->atom, &vb, &err)) + die("%s", err.buf); + strbuf_release(&err); cmp_fn = s->ignore_case ? strcasecmp : strcmp; if (s->version) cmp = versioncmp(va->s, vb->s); @@ -2230,7 +2246,8 @@ int format_ref_array_item(struct ref_array_item *info, pos = parse_ref_filter_atom(format, sp + 2, ep, error_buf); if (pos < 0) return -1; - get_ref_atom_value(info, pos, &atomv); + if (get_ref_atom_value(info, pos, &atomv, error_buf)) + return -1; if (atomv->handler(atomv, &state, error_buf)) return -1; } -- https://github.com/git/git/pull/466