diff mbox series

[v6,4/9] convert: add classification for conv_attrs struct

Message ID 01ac6176ccd8fb20372cf72b6aee33d5ed98c54f.1616508954.git.matheus.bernardino@usp.br (mailing list archive)
State Accepted
Commit f59d15bb420b649a6ee3163a3418aac6b813d331
Headers show
Series Parallel Checkout (part 1) | expand

Commit Message

Matheus Tavares March 23, 2021, 2:19 p.m. UTC
From: Jeff Hostetler <jeffhost@microsoft.com>

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>
---
 convert.c | 26 +++++++++++++++++++-------
 convert.h | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/convert.c b/convert.c
index 3f39c62cac..3298e4acff 100644
--- a/convert.c
+++ b/convert.c
@@ -1953,13 +1953,7 @@  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)
@@ -2015,3 +2009,21 @@  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;
+}
diff --git a/convert.h b/convert.h
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 */