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vcs-svn: handle_node: use repo_read_path

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svn-fe processes each commit in two stages: first decide on the
correct content for all paths and export the relevant blobs, then
export a commit with the result.

But we can keep less state and simplify svn-fe a great deal by
exporting the commit in one step: use 'inline' blobs for each path and
remember nothing.  This way, the repo_tree structure could be
eliminated, and we would get support for incremental imports 'for
free'.

Reorganize handle_node along these lines.  This is just a code
cleanup; the changes in repo_tree and handle_revision will come later.

[db: backported to apply without text delta support]

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: David Barr <david.barr@cordelta.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
This commit is contained in:
Jonathan Nieder 2010-12-10 04:28:06 -06:00
parent 4f5de755a7
commit 5a38b186d3
1 changed files with 23 additions and 10 deletions
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33
vcs-svn/svndump.c
View file

@ -201,13 +201,14 @@ static void handle_node(void)
uint32_t mark = 0;
const uint32_t type = node_ctx.type;
const int have_props = node_ctx.propLength != LENGTH_UNKNOWN;
const int have_text = node_ctx.textLength != LENGTH_UNKNOWN;
if (node_ctx.text_delta)
die("text deltas not supported");
if (node_ctx.textLength != LENGTH_UNKNOWN)
if (have_text)
mark = next_blob_mark();
if (node_ctx.action == NODEACT_DELETE) {
if (mark || have_props || node_ctx.srcRev)
if (have_text || have_props || node_ctx.srcRev)
die("invalid dump: deletion node has "
"copyfrom info, text, or properties");
return repo_delete(node_ctx.dst);
@ -221,13 +222,20 @@ static void handle_node(void)
if (node_ctx.action == NODEACT_ADD)
node_ctx.action = NODEACT_CHANGE;
}
if (mark && type == REPO_MODE_DIR)
if (have_text && type == REPO_MODE_DIR)
die("invalid dump: directories cannot have text attached");
/*
* Decide on the new content (mark) and mode (node_ctx.type).
*/
if (node_ctx.action == NODEACT_CHANGE && !~*node_ctx.dst) {
if (type != REPO_MODE_DIR)
die("invalid dump: root of tree is not a regular file");
} else if (node_ctx.action == NODEACT_CHANGE) {
uint32_t mode = repo_modify_path(node_ctx.dst, 0, mark);
uint32_t mode;
if (!have_text)
mark = repo_read_path(node_ctx.dst);
mode = repo_modify_path(node_ctx.dst, 0, 0);
if (!mode)
die("invalid dump: path to be modified is missing");
if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
@ -236,22 +244,27 @@ static void handle_node(void)
die("invalid dump: cannot modify a file into a directory");
node_ctx.type = mode;
} else if (node_ctx.action == NODEACT_ADD) {
if (!mark && type != REPO_MODE_DIR)
if (!have_text && type != REPO_MODE_DIR)
die("invalid dump: adds node without text");
repo_add(node_ctx.dst, type, mark);
} else {
die("invalid dump: Node-path block lacks Node-action");
}
/*
* Adjust mode to reflect properties.
*/
if (have_props) {
const uint32_t old_mode = node_ctx.type;
if (!node_ctx.prop_delta)
node_ctx.type = type;
if (node_ctx.propLength)
read_props();
if (node_ctx.type != old_mode)
repo_modify_path(node_ctx.dst, node_ctx.type, mark);
}
if (mark)
/*
* Save the result.
*/
repo_add(node_ctx.dst, node_ctx.type, mark);
if (have_text)
fast_export_blob(node_ctx.type, mark,
node_ctx.textLength, &input);
}