crawl: remove UUID from file names

Unfortunately we don't get to remove the libuuid dependency because
we still want to read a file that exists in the legacy location.

src/bees-roots.cc

@@ -50,9 +50,18 @@ string
 BeesRoots::crawl_state_filename() const
 {
 	string rv;
+
+	// Legacy filename included UUID
 	rv += "beescrawl.";
 	rv += m_ctx->root_uuid();
 	rv += ".dat";
+
+	struct stat buf;
+	if (fstatat(m_ctx->home_fd(), rv.c_str(), &buf, AT_SYMLINK_NOFOLLOW)) {
+		// Use new filename
+		rv = "beescrawl.dat";
+	}
+
 	return rv;
 }
 
@@ -101,6 +110,12 @@ BeesRoots::state_save()
 
 	m_crawl_state_file.write(ofs.str());
 
+	// Renaming things is hard after release
+	if (m_crawl_state_file.name() != "beescrawl.dat") {
+		renameat(m_ctx->home_fd(), m_crawl_state_file.name().c_str(), m_ctx->home_fd(), "beescrawl.dat");
+		m_crawl_state_file.name("beescrawl.dat");
+	}
+
 	BEESNOTE("relocking crawl state");
 	lock.lock();
 	// Not really correct but probably close enough

src/bees.cc

@@ -351,6 +351,18 @@ BeesStringFile::BeesStringFile(Fd dir_fd, string name, size_t limit) :
 	BEESLOG("BeesStringFile " << name_fd(m_dir_fd) << "/" << m_name << " max size " << pretty(m_limit));
 }
 
+void
+BeesStringFile::name(const string &new_name)
+{
+	m_name = new_name;
+}
+
+string
+BeesStringFile::name() const
+{
+	return m_name;
+}
+
 string
 BeesStringFile::read()
 {

src/bees.h

@@ -374,6 +374,8 @@ public:
 	BeesStringFile(Fd dir_fd, string name, size_t limit = 1024 * 1024);
 	string read();
 	void write(string contents);
+	void name(const string &new_name);
+	string name() const;
 };
 
 class BeesHashTable {