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* In dumpPath(): pass a function object that allows files to be

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selectively in/excluded from the dump.
This commit is contained in:
Eelco Dolstra 2006-12-12 21:51:02 +00:00
parent 3130f1f0fa
commit b438d37558
2 changed files with 28 additions and 14 deletions
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31
src/libutil/archive.cc
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@ -18,10 +18,13 @@ namespace nix {
static string archiveVersion1 = "nix-archive-1";
static void dump(const string & path, Sink & sink);
DumpFilter defaultDumpFilter;
static void dumpEntries(const Path & path, Sink & sink)
static void dump(const string & path, Sink & sink, DumpFilter & filter);
static void dumpEntries(const Path & path, Sink & sink, DumpFilter & filter)
{
Strings names = readDirectory(path);
vector<string> names2(names.begin(), names.end());
@ -30,13 +33,15 @@ static void dumpEntries(const Path & path, Sink & sink)
for (vector<string>::iterator it = names2.begin();
it != names2.end(); it++)
{
writeString("entry", sink);
writeString("(", sink);
writeString("name", sink);
writeString(*it, sink);
writeString("node", sink);
dump(path + "/" + *it, sink);
writeString(")", sink);
if (filter(path)) {
writeString("entry", sink);
writeString("(", sink);
writeString("name", sink);
writeString(*it, sink);
writeString("node", sink);
dump(path + "/" + *it, sink, filter);
writeString(")", sink);
}
}
}
@ -64,7 +69,7 @@ static void dumpContents(const Path & path, unsigned int size,
}
static void dump(const Path & path, Sink & sink)
static void dump(const Path & path, Sink & sink, DumpFilter & filter)
{
struct stat st;
if (lstat(path.c_str(), &st))
@ -85,7 +90,7 @@ static void dump(const Path & path, Sink & sink)
else if (S_ISDIR(st.st_mode)) {
writeString("type", sink);
writeString("directory", sink);
dumpEntries(path, sink);
dumpEntries(path, sink, filter);
}
else if (S_ISLNK(st.st_mode)) {
@ -101,10 +106,10 @@ static void dump(const Path & path, Sink & sink)
}
void dumpPath(const Path & path, Sink & sink)
void dumpPath(const Path & path, Sink & sink, DumpFilter & filter)
{
writeString(archiveVersion1, sink);
dump(path, sink);
dump(path, sink, filter);
}

11
src/libutil/archive.hh
View file

@ -45,7 +45,16 @@ namespace nix {
`+' denotes string concatenation. */
void dumpPath(const Path & path, Sink & sink);
struct DumpFilter
{
virtual ~DumpFilter() { }
virtual bool operator () (const Path & path) { return true; }
};
extern DumpFilter defaultDumpFilter;
void dumpPath(const Path & path, Sink & sink,
DumpFilter & filter = defaultDumpFilter);
void restorePath(const Path & path, Source & source);