convert: add classification for conv_attrs struct
Create `enum conv_attrs_classification` to express the different ways that attributes are handled for a blob during checkout. This will be used in a later commit when deciding whether to add a file to the parallel or delayed queue during checkout. For now, we can also use it in get_stream_filter_ca() to simplify the function (as the classifying logic is the same). Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff Hostetler committed
Dec 16, 2020 at 11:50 UTC
f59d15bb420b649a6ee3163a3418aac6b813d331
2 files changed
+52
-7
convert.c
+19
-7
index 9af6aafc5a..b9d25d9a47 100644
--- a/convert.c
+++ b/convert.c
@@ -1954,13 +1954,7 @@ struct stream_filter *get_stream_filter_ca(const struct conv_attrs *ca,
{
struct stream_filter *filter = NULL;
- if (ca->drv && (ca->drv->process || ca->drv->smudge || ca->drv->clean))
- return NULL;
-
- if (ca->working_tree_encoding)
- return NULL;
-
- if (ca->crlf_action == CRLF_AUTO || ca->crlf_action == CRLF_AUTO_CRLF)
+ if (classify_conv_attrs(ca) != CA_CLASS_STREAMABLE)
return NULL;
if (ca->ident)
@@ -2016,3 +2010,21 @@ void clone_checkout_metadata(struct checkout_metadata *dst,
if (blob)
oidcpy(&dst->blob, blob);
}
+
+enum conv_attrs_classification classify_conv_attrs(const struct conv_attrs *ca)
+{
+ if (ca->drv) {
+ if (ca->drv->process)
+ return CA_CLASS_INCORE_PROCESS;
+ if (ca->drv->smudge || ca->drv->clean)
+ return CA_CLASS_INCORE_FILTER;
+ }
+
+ if (ca->working_tree_encoding)
+ return CA_CLASS_INCORE;
+
+ if (ca->crlf_action == CRLF_AUTO || ca->crlf_action == CRLF_AUTO_CRLF)
+ return CA_CLASS_INCORE;
+
+ return CA_CLASS_STREAMABLE;
+}
convert.h
+33
index 484b50965d..43e567a59b 100644
--- a/convert.h
+++ b/convert.h
@@ -200,4 +200,37 @@ int stream_filter(struct stream_filter *,
const char *input, size_t *isize_p,
char *output, size_t *osize_p);
+enum conv_attrs_classification {
+ /*
+ * The blob must be loaded into a buffer before it can be
+ * smudged. All smudging is done in-proc.
+ */
+ CA_CLASS_INCORE,
+
+ /*
+ * The blob must be loaded into a buffer, but uses a
+ * single-file driver filter, such as rot13.
+ */
+ CA_CLASS_INCORE_FILTER,
+
+ /*
+ * The blob must be loaded into a buffer, but uses a
+ * long-running driver process, such as LFS. This might or
+ * might not use delayed operations. (The important thing is
+ * that there is a single subordinate long-running process
+ * handling all associated blobs and in case of delayed
+ * operations, may hold per-blob state.)
+ */
+ CA_CLASS_INCORE_PROCESS,
+
+ /*
+ * The blob can be streamed and smudged without needing to
+ * completely read it into a buffer.
+ */
+ CA_CLASS_STREAMABLE,
+};
+
+enum conv_attrs_classification classify_conv_attrs(
+ const struct conv_attrs *ca);
+
#endif /* CONVERT_H */