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authorLibravatar Junio C Hamano <gitster@pobox.com>2012-03-04 22:16:40 -0800
committerLibravatar Junio C Hamano <gitster@pobox.com>2012-03-04 22:16:40 -0800
commita09a0c27094f15774e513286c02adacc11b6e6b2 (patch)
treed0368dde01b2e8820f169b9264573f479f892679
parentMerge branch 'jb/filter-ignore-sigpipe' into maint (diff)
parentdo not stream large files to pack when filters are in use (diff)
downloadtgif-a09a0c27094f15774e513286c02adacc11b6e6b2.tar.xz
Merge branch 'jk/maint-avoid-streaming-filtered-contents' into maint
* jk/maint-avoid-streaming-filtered-contents: do not stream large files to pack when filters are in use teach dry-run convert_to_git not to require a src buffer teach convert_to_git a "dry run" mode
-rw-r--r--convert.c29
-rw-r--r--convert.h5
-rw-r--r--sha1_file.c14
-rwxr-xr-xt/t1051-large-conversion.sh86
4 files changed, 125 insertions, 9 deletions
diff --git a/convert.c b/convert.c
index 33373b3ac0..4534e2c2b0 100644
--- a/convert.c
+++ b/convert.c
@@ -196,9 +196,17 @@ static int crlf_to_git(const char *path, const char *src, size_t len,
char *dst;
if (crlf_action == CRLF_BINARY ||
- (crlf_action == CRLF_GUESS && auto_crlf == AUTO_CRLF_FALSE) || !len)
+ (crlf_action == CRLF_GUESS && auto_crlf == AUTO_CRLF_FALSE) ||
+ (src && !len))
return 0;
+ /*
+ * If we are doing a dry-run and have no source buffer, there is
+ * nothing to analyze; we must assume we would convert.
+ */
+ if (!buf && !src)
+ return 1;
+
gather_stats(src, len, &stats);
if (crlf_action == CRLF_AUTO || crlf_action == CRLF_GUESS) {
@@ -232,6 +240,13 @@ static int crlf_to_git(const char *path, const char *src, size_t len,
if (!stats.cr)
return 0;
+ /*
+ * At this point all of our source analysis is done, and we are sure we
+ * would convert. If we are in dry-run mode, we can give an answer.
+ */
+ if (!buf)
+ return 1;
+
/* only grow if not in place */
if (strbuf_avail(buf) + buf->len < len)
strbuf_grow(buf, len - buf->len);
@@ -396,6 +411,9 @@ static int apply_filter(const char *path, const char *src, size_t len,
if (!cmd)
return 0;
+ if (!dst)
+ return 1;
+
memset(&async, 0, sizeof(async));
async.proc = filter_buffer;
async.data = &params;
@@ -527,9 +545,12 @@ static int ident_to_git(const char *path, const char *src, size_t len,
{
char *dst, *dollar;
- if (!ident || !count_ident(src, len))
+ if (!ident || (src && !count_ident(src, len)))
return 0;
+ if (!buf)
+ return 1;
+
/* only grow if not in place */
if (strbuf_avail(buf) + buf->len < len)
strbuf_grow(buf, len - buf->len);
@@ -759,13 +780,13 @@ int convert_to_git(const char *path, const char *src, size_t len,
filter = ca.drv->clean;
ret |= apply_filter(path, src, len, dst, filter);
- if (ret) {
+ if (ret && dst) {
src = dst->buf;
len = dst->len;
}
ca.crlf_action = input_crlf_action(ca.crlf_action, ca.eol_attr);
ret |= crlf_to_git(path, src, len, dst, ca.crlf_action, checksafe);
- if (ret) {
+ if (ret && dst) {
src = dst->buf;
len = dst->len;
}
diff --git a/convert.h b/convert.h
index d799a165b4..ec5fd69430 100644
--- a/convert.h
+++ b/convert.h
@@ -40,6 +40,11 @@ extern int convert_to_working_tree(const char *path, const char *src,
size_t len, struct strbuf *dst);
extern int renormalize_buffer(const char *path, const char *src, size_t len,
struct strbuf *dst);
+static inline int would_convert_to_git(const char *path, const char *src,
+ size_t len, enum safe_crlf checksafe)
+{
+ return convert_to_git(path, src, len, NULL, checksafe);
+}
/*****************************************************************
*
diff --git a/sha1_file.c b/sha1_file.c
index f9f8d5e91c..4f06a0e450 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2700,10 +2700,13 @@ static int index_core(unsigned char *sha1, int fd, size_t size,
* This also bypasses the usual "convert-to-git" dance, and that is on
* purpose. We could write a streaming version of the converting
* functions and insert that before feeding the data to fast-import
- * (or equivalent in-core API described above), but the primary
- * motivation for trying to stream from the working tree file and to
- * avoid mmaping it in core is to deal with large binary blobs, and
- * by definition they do _not_ want to get any conversion.
+ * (or equivalent in-core API described above). However, that is
+ * somewhat complicated, as we do not know the size of the filter
+ * result, which we need to know beforehand when writing a git object.
+ * Since the primary motivation for trying to stream from the working
+ * tree file and to avoid mmaping it in core is to deal with large
+ * binary blobs, they generally do not want to get any conversion, and
+ * callers should avoid this code path when filters are requested.
*/
static int index_stream(unsigned char *sha1, int fd, size_t size,
enum object_type type, const char *path,
@@ -2720,7 +2723,8 @@ int index_fd(unsigned char *sha1, int fd, struct stat *st,
if (!S_ISREG(st->st_mode))
ret = index_pipe(sha1, fd, type, path, flags);
- else if (size <= big_file_threshold || type != OBJ_BLOB)
+ else if (size <= big_file_threshold || type != OBJ_BLOB ||
+ (path && would_convert_to_git(path, NULL, 0, 0)))
ret = index_core(sha1, fd, size, type, path, flags);
else
ret = index_stream(sha1, fd, size, type, path, flags);
diff --git a/t/t1051-large-conversion.sh b/t/t1051-large-conversion.sh
new file mode 100755
index 0000000000..8b7640b3ba
--- /dev/null
+++ b/t/t1051-large-conversion.sh
@@ -0,0 +1,86 @@
+#!/bin/sh
+
+test_description='test conversion filters on large files'
+. ./test-lib.sh
+
+set_attr() {
+ test_when_finished 'rm -f .gitattributes' &&
+ echo "* $*" >.gitattributes
+}
+
+check_input() {
+ git read-tree --empty &&
+ git add small large &&
+ git cat-file blob :small >small.index &&
+ git cat-file blob :large | head -n 1 >large.index &&
+ test_cmp small.index large.index
+}
+
+check_output() {
+ rm -f small large &&
+ git checkout small large &&
+ head -n 1 large >large.head &&
+ test_cmp small large.head
+}
+
+test_expect_success 'setup input tests' '
+ printf "\$Id: foo\$\\r\\n" >small &&
+ cat small small >large &&
+ git config core.bigfilethreshold 20 &&
+ git config filter.test.clean "sed s/.*/CLEAN/"
+'
+
+test_expect_success 'autocrlf=true converts on input' '
+ test_config core.autocrlf true &&
+ check_input
+'
+
+test_expect_success 'eol=crlf converts on input' '
+ set_attr eol=crlf &&
+ check_input
+'
+
+test_expect_success 'ident converts on input' '
+ set_attr ident &&
+ check_input
+'
+
+test_expect_success 'user-defined filters convert on input' '
+ set_attr filter=test &&
+ check_input
+'
+
+test_expect_success 'setup output tests' '
+ echo "\$Id\$" >small &&
+ cat small small >large &&
+ git add small large &&
+ git config core.bigfilethreshold 7 &&
+ git config filter.test.smudge "sed s/.*/SMUDGE/"
+'
+
+test_expect_success 'autocrlf=true converts on output' '
+ test_config core.autocrlf true &&
+ check_output
+'
+
+test_expect_success 'eol=crlf converts on output' '
+ set_attr eol=crlf &&
+ check_output
+'
+
+test_expect_success 'user-defined filters convert on output' '
+ set_attr filter=test &&
+ check_output
+'
+
+test_expect_success 'ident converts on output' '
+ set_attr ident &&
+ rm -f small large &&
+ git checkout small large &&
+ sed -n "s/Id: .*/Id: SHA/p" <small >small.clean &&
+ head -n 1 large >large.head &&
+ sed -n "s/Id: .*/Id: SHA/p" <large.head >large.clean &&
+ test_cmp small.clean large.clean
+'
+
+test_done