vcs-svn: Allow simple v3 dumps (no deltas yet)

Since the dumpfile version 1 days, the Subversion dump format
gained some new fields:

- a unique identifier for the repository (version 2 format)
- whether the text and properties for a node should be
interpreted as deltas
- checksums for a delta's preimage
- SHA-1 sums as alternatives to the existing MD5 checksums for
copy source and the payload (delta).

For now what is relevant to us is the Text-delta and Prop-delta
fields, since not noticing these causes a dump file to be
misinterpreted (see the previous commit).

[jn: with tests]

Signed-off-by: David Barr <david.barr@cordelta.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t9010-svn-fe.sh b/t/t9010-svn-fe.sh
index e9e46ea0fe95267df1c39129a1708d09820c712a..be5372ab3bee5220af03723ce6aedf518a5e7417 100755 (executable)
--- a/t/t9010-svn-fe.sh
+++ b/t/t9010-svn-fe.sh
@@ -9,6 +9,30 @@ reinit_git () {
        git init
 }
 
+properties () {
+       while test "$#" -ne 0
+       do
+               property="$1" &&
+               value="$2" &&
+               printf "%s\n" "K ${#property}" &&
+               printf "%s\n" "$property" &&
+               printf "%s\n" "V ${#value}" &&
+               printf "%s\n" "$value" &&
+               shift 2 ||
+               return 1
+       done
+}
+
+text_no_props () {
+       text="$1
+" &&
+       printf "%s\n" "Prop-content-length: 10" &&
+       printf "%s\n" "Text-content-length: ${#text}" &&
+       printf "%s\n" "Content-length: $((${#text} + 10))" &&
+       printf "%s\n" "" "PROPS-END" &&
+       printf "%s\n" "$text"
+}
+
 >empty
 
 test_expect_success 'empty dump' '
@@ -18,13 +42,333 @@ test_expect_success 'empty dump' '
        git fast-import <stream
 '
 
-test_expect_success 'v3 dumps not supported' '
+test_expect_success 'v4 dumps not supported' '
        reinit_git &&
-       echo "SVN-fs-dump-format-version: 3" >input &&
-       test_must_fail test-svn-fe input >stream &&
+       echo "SVN-fs-dump-format-version: 4" >v4.dump &&
+       test_must_fail test-svn-fe v4.dump >stream &&
        test_cmp empty stream
 '
 
+test_expect_failure 'empty revision' '
+       reinit_git &&
+       printf "rev <nobody, nobody@local>: %s\n" "" "" >expect &&
+       cat >emptyrev.dump <<-\EOF &&
+       SVN-fs-dump-format-version: 3
+
+       Revision-number: 1
+       Prop-content-length: 0
+       Content-length: 0
+
+       Revision-number: 2
+       Prop-content-length: 0
+       Content-length: 0
+
+       EOF
+       test-svn-fe emptyrev.dump >stream &&
+       git fast-import <stream &&
+       git log -p --format="rev <%an, %ae>: %s" HEAD >actual &&
+       test_cmp expect actual
+'
+
+test_expect_success 'empty properties' '
+       reinit_git &&
+       printf "rev <nobody, nobody@local>: %s\n" "" "" >expect &&
+       cat >emptyprop.dump <<-\EOF &&
+       SVN-fs-dump-format-version: 3
+
+       Revision-number: 1
+       Prop-content-length: 10
+       Content-length: 10
+
+       PROPS-END
+
+       Revision-number: 2
+       Prop-content-length: 10
+       Content-length: 10
+
+       PROPS-END
+       EOF
+       test-svn-fe emptyprop.dump >stream &&
+       git fast-import <stream &&
+       git log -p --format="rev <%an, %ae>: %s" HEAD >actual &&
+       test_cmp expect actual
+'
+
+test_expect_success 'author name and commit message' '
+       reinit_git &&
+       echo "<author@example.com, author@example.com@local>" >expect.author &&
+       cat >message <<-\EOF &&
+       A concise summary of the change
+
+       A detailed description of the change, why it is needed, what
+       was broken and why applying this is the best course of action.
+
+       * file.c
+           Details pertaining to an individual file.
+       EOF
+       {
+               properties \
+                       svn:author author@example.com \
+                       svn:log "$(cat message)" &&
+               echo PROPS-END
+       } >props &&
+       {
+               echo "SVN-fs-dump-format-version: 3" &&
+               echo &&
+               echo "Revision-number: 1" &&
+               echo Prop-content-length: $(wc -c <props) &&
+               echo Content-length: $(wc -c <props) &&
+               echo &&
+               cat props
+       } >log.dump &&
+       test-svn-fe log.dump >stream &&
+       git fast-import <stream &&
+       git log -p --format="%B" HEAD >actual.log &&
+       git log --format="<%an, %ae>" >actual.author &&
+       test_cmp message actual.log &&
+       test_cmp expect.author actual.author
+'
+
+test_expect_success 'unsupported properties are ignored' '
+       reinit_git &&
+       echo author >expect &&
+       cat >extraprop.dump <<-\EOF &&
+       SVN-fs-dump-format-version: 3
+
+       Revision-number: 1
+       Prop-content-length: 56
+       Content-length: 56
+
+       K 8
+       nonsense
+       V 1
+       y
+       K 10
+       svn:author
+       V 6
+       author
+       PROPS-END
+       EOF
+       test-svn-fe extraprop.dump >stream &&
+       git fast-import <stream &&
+       git log -p --format=%an HEAD >actual &&
+       test_cmp expect actual
+'
+
+test_expect_failure 'timestamp and empty file' '
+       echo author@example.com >expect.author &&
+       echo 1999-01-01 >expect.date &&
+       echo file >expect.files &&
+       reinit_git &&
+       {
+               properties \
+                       svn:author author@example.com \
+                       svn:date "1999-01-01T00:01:002.000000Z" \
+                       svn:log "add empty file" &&
+               echo PROPS-END
+       } >props &&
+       {
+               cat <<-EOF &&
+               SVN-fs-dump-format-version: 3
+
+               Revision-number: 1
+               EOF
+               echo Prop-content-length: $(wc -c <props) &&
+               echo Content-length: $(wc -c <props) &&
+               echo &&
+               cat props &&
+               cat <<-\EOF
+
+               Node-path: empty-file
+               Node-kind: file
+               Node-action: add
+               Content-length: 0
+
+               EOF
+       } >emptyfile.dump &&
+       test-svn-fe emptyfile.dump >stream &&
+       git fast-import <stream &&
+       git log --format=%an HEAD >actual.author &&
+       git log --date=short --format=%ad HEAD >actual.date &&
+       git ls-tree -r --name-only HEAD >actual.files &&
+       test_cmp expect.author actual.author &&
+       test_cmp expect.date actual.date &&
+       test_cmp expect.files actual.files &&
+       git checkout HEAD empty-file &&
+       test_cmp empty file
+'
+
+test_expect_success 'directory with files' '
+       reinit_git &&
+       printf "%s\n" directory/file1 directory/file2 >expect.files &&
+       echo hi >hi &&
+       echo hello >hello &&
+       {
+               properties \
+                       svn:author author@example.com \
+                       svn:date "1999-02-01T00:01:002.000000Z" \
+                       svn:log "add directory with some files in it" &&
+               echo PROPS-END
+       } >props &&
+       {
+               cat <<-EOF &&
+               SVN-fs-dump-format-version: 3
+
+               Revision-number: 1
+               EOF
+               echo Prop-content-length: $(wc -c <props) &&
+               echo Content-length: $(wc -c <props) &&
+               echo &&
+               cat props &&
+               cat <<-\EOF &&
+
+               Node-path: directory
+               Node-kind: dir
+               Node-action: add
+               Prop-content-length: 10
+               Content-length: 10
+
+               PROPS-END
+
+               Node-path: directory/file1
+               Node-kind: file
+               Node-action: add
+               EOF
+               text_no_props hello &&
+               cat <<-\EOF &&
+               Node-path: directory/file2
+               Node-kind: file
+               Node-action: add
+               EOF
+               text_no_props hi
+       } >directory.dump &&
+       test-svn-fe directory.dump >stream &&
+       git fast-import <stream &&
+
+       git ls-tree -r --name-only HEAD >actual.files &&
+       git checkout HEAD directory &&
+       test_cmp expect.files actual.files &&
+       test_cmp hello directory/file1 &&
+       test_cmp hi directory/file2
+'
+
+test_expect_success 'deltas not supported' '
+       {
+               # (old) h + (inline) ello + (old) \n
+               printf "SVNQ%b%b%s" "Q\003\006\005\004" "\001Q\0204\001\002" "ello" |
+               q_to_nul
+       } >delta &&
+       {
+               properties \
+                       svn:author author@example.com \
+                       svn:date "1999-01-05T00:01:002.000000Z" \
+                       svn:log "add greeting" &&
+               echo PROPS-END
+       } >props &&
+       {
+               properties \
+                       svn:author author@example.com \
+                       svn:date "1999-01-06T00:01:002.000000Z" \
+                       svn:log "change it" &&
+               echo PROPS-END
+       } >props2 &&
+       {
+               echo SVN-fs-dump-format-version: 3 &&
+               echo &&
+               echo Revision-number: 1 &&
+               echo Prop-content-length: $(wc -c <props) &&
+               echo Content-length: $(wc -c <props) &&
+               echo &&
+               cat props &&
+               cat <<-\EOF &&
+
+               Node-path: hello
+               Node-kind: file
+               Node-action: add
+               Prop-content-length: 10
+               Text-content-length: 3
+               Content-length: 13
+
+               PROPS-END
+               hi
+
+               EOF
+               echo Revision-number: 2 &&
+               echo Prop-content-length: $(wc -c <props2) &&
+               echo Content-length: $(wc -c <props2) &&
+               echo &&
+               cat props2 &&
+               cat <<-\EOF &&
+
+               Node-path: hello
+               Node-kind: file
+               Node-action: change
+               Text-delta: true
+               Prop-content-length: 10
+               EOF
+               echo Text-content-length: $(wc -c <delta) &&
+               echo Content-length: $((10 + $(wc -c <delta))) &&
+               echo &&
+               echo PROPS-END &&
+               cat delta
+       } >delta.dump &&
+       test_must_fail test-svn-fe delta.dump
+'
+
+test_expect_success 'property deltas not supported' '
+       {
+               properties \
+                       svn:author author@example.com \
+                       svn:date "1999-03-06T00:01:002.000000Z" \
+                       svn:log "make an executable, or chmod -x it" &&
+               echo PROPS-END
+       } >revprops &&
+       {
+               echo SVN-fs-dump-format-version: 3 &&
+               echo &&
+               echo Revision-number: 1 &&
+               echo Prop-content-length: $(wc -c <revprops) &&
+               echo Content-length: $(wc -c <revprops) &&
+               echo &&
+               cat revprops &&
+               echo &&
+               cat <<-\EOF &&
+               Node-path: script.sh
+               Node-kind: file
+               Node-action: add
+               Text-content-length: 0
+               Prop-content-length: 39
+               Content-length: 39
+
+               K 14
+               svn:executable
+               V 4
+               true
+               PROPS-END
+
+               EOF
+               echo Revision-number: 2 &&
+               echo Prop-content-length: $(wc -c <revprops) &&
+               echo Content-length: $(wc -c <revprops) &&
+               echo &&
+               cat revprops &&
+               echo &&
+               cat <<-\EOF
+               Node-path: script.sh
+               Node-kind: file
+               Node-action: change
+               Prop-delta: true
+               Prop-content-length: 30
+               Content-length: 30
+
+               D 14
+               svn:executable
+               PROPS-END
+               EOF
+       } >propdelta.dump &&
+       test_must_fail test-svn-fe propdelta.dump
+'
+
 test_expect_success 't9135/svn.dump' '
        svnadmin create simple-svn &&
        svnadmin load simple-svn <"$TEST_DIRECTORY/t9135/svn.dump" &&

diff --git a/vcs-svn/svndump.c b/vcs-svn/svndump.c
index fa580e62de05f832e7d7474cc1a457cd7379cef2..6b64c1b8573c00fd09f6387bbda3714d1336356c 100644 (file)
--- a/vcs-svn/svndump.c
+++ b/vcs-svn/svndump.c
@@ -42,6 +42,7 @@ static char* log_copy(uint32_t length, char *log)
 static struct {
        uint32_t action, propLength, textLength, srcRev, srcMode, mark, type;
        uint32_t src[REPO_MAX_PATH_DEPTH], dst[REPO_MAX_PATH_DEPTH];
+       uint32_t text_delta, prop_delta;
 } node_ctx;
 
 static struct {
@@ -58,7 +59,9 @@ static struct {
        uint32_t svn_log, svn_author, svn_date, svn_executable, svn_special, uuid,
                revision_number, node_path, node_kind, node_action,
                node_copyfrom_path, node_copyfrom_rev, text_content_length,
-               prop_content_length, content_length, svn_fs_dump_format_version;
+               prop_content_length, content_length, svn_fs_dump_format_version,
+               /* version 3 format */
+               text_delta, prop_delta;
 } keys;
 
 static void reset_node_ctx(char *fname)
@@ -72,6 +75,8 @@ static void reset_node_ctx(char *fname)
        node_ctx.srcMode = 0;
        pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.dst, "/", fname);
        node_ctx.mark = 0;
+       node_ctx.text_delta = 0;
+       node_ctx.prop_delta = 0;
 }
 
 static void reset_rev_ctx(uint32_t revision)
@@ -107,6 +112,9 @@ static void init_keys(void)
        keys.prop_content_length = pool_intern("Prop-content-length");
        keys.content_length = pool_intern("Content-length");
        keys.svn_fs_dump_format_version = pool_intern("SVN-fs-dump-format-version");
+       /* version 3 format (Subversion 1.1.0) */
+       keys.text_delta = pool_intern("Text-delta");
+       keys.prop_delta = pool_intern("Prop-delta");
 }
 
 static void read_props(void)
@@ -144,6 +152,9 @@ static void read_props(void)
 
 static void handle_node(void)
 {
+       if (node_ctx.text_delta || node_ctx.prop_delta)
+               die("text and property deltas not supported");
+
        if (node_ctx.propLength != LENGTH_UNKNOWN && node_ctx.propLength)
                read_props();
 
@@ -210,8 +221,8 @@ void svndump_read(const char *url)
 
                if (key == keys.svn_fs_dump_format_version) {
                        dump_ctx.version = atoi(val);
-                       if (dump_ctx.version > 2)
-                               die("expected svn dump format version <= 2, found %d",
+                       if (dump_ctx.version > 3)
+                               die("expected svn dump format version <= 3, found %d",
                                    dump_ctx.version);
                } else if (key == keys.uuid) {
                        dump_ctx.uuid = pool_intern(val);
@@ -255,6 +266,10 @@ void svndump_read(const char *url)
                        node_ctx.textLength = atoi(val);
                } else if (key == keys.prop_content_length) {
                        node_ctx.propLength = atoi(val);
+               } else if (key == keys.text_delta) {
+                       node_ctx.text_delta = !strcmp(val, "true");
+               } else if (key == keys.prop_delta) {
+                       node_ctx.prop_delta = !strcmp(val, "true");
                } else if (key == keys.content_length) {
                        len = atoi(val);
                        buffer_read_line();