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selective.d
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selective.d
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import std.algorithm;
import std.array;
import std.file;
import std.path;
import std.regex;
import std.stdio;
import util;
import log;
final class SelectiveSync
{
private string[] paths;
private string[] businessSharedFoldersList;
private Regex!char mask;
private Regex!char dirmask;
private bool skipDirStrictMatch = false;
private bool skipDotfiles = false;
// load sync_list file
void load(string filepath)
{
if (exists(filepath)) {
// open file as read only
auto file = File(filepath, "r");
auto range = file.byLine();
foreach (line; range) {
// Skip comments in file
if (line.length == 0 || line[0] == ';' || line[0] == '#') continue;
paths ~= buildNormalizedPath(line);
}
file.close();
}
}
// Configure skipDirStrictMatch if function is called
// By default, skipDirStrictMatch = false;
void setSkipDirStrictMatch()
{
skipDirStrictMatch = true;
}
// load business_shared_folders file
void loadSharedFolders(string filepath)
{
if (exists(filepath)) {
// open file as read only
auto file = File(filepath, "r");
auto range = file.byLine();
foreach (line; range) {
// Skip comments in file
if (line.length == 0 || line[0] == ';' || line[0] == '#') continue;
businessSharedFoldersList ~= buildNormalizedPath(line);
}
file.close();
}
}
void setFileMask(const(char)[] mask)
{
this.mask = wild2regex(mask);
}
void setDirMask(const(char)[] dirmask)
{
this.dirmask = wild2regex(dirmask);
}
// Configure skipDotfiles if function is called
// By default, skipDotfiles = false;
void setSkipDotfiles()
{
skipDotfiles = true;
}
// return value of skipDotfiles
bool getSkipDotfiles()
{
return skipDotfiles;
}
// config file skip_dir parameter
bool isDirNameExcluded(string name)
{
// Does the directory name match skip_dir config entry?
// Returns true if the name matches a skip_dir config entry
// Returns false if no match
log.vdebug("skip_dir evaluation for: ", name);
// Try full path match first
if (!name.matchFirst(dirmask).empty) {
return true;
} else {
// Do we check the base name as well?
if (!skipDirStrictMatch) {
// check just the basename in the path
string parent = baseName(name);
if(!parent.matchFirst(dirmask).empty) {
return true;
}
}
}
// no match
return false;
}
// config file skip_file parameter
bool isFileNameExcluded(string name)
{
// Does the file name match skip_file config entry?
// Returns true if the name matches a skip_file config entry
// Returns false if no match
log.vdebug("skip_file evaluation for: ", name);
// Try full path match first
if (!name.matchFirst(mask).empty) {
return true;
} else {
// check just the file name
string filename = baseName(name);
if(!filename.matchFirst(mask).empty) {
return true;
}
}
// no match
return false;
}
// Match against sync_list only
bool isPathExcludedViaSyncList(string path)
{
return .isPathExcluded(path, paths);
}
// Match against skip_dir, skip_file & sync_list entries
bool isPathExcludedMatchAll(string path)
{
return .isPathExcluded(path, paths) || .isPathMatched(path, mask) || .isPathMatched(path, dirmask);
}
// is the path a dotfile?
bool isDotFile(string path)
{
// always allow the root
if (path == ".") return false;
path = buildNormalizedPath(path);
auto paths = pathSplitter(path);
foreach(base; paths) {
if (startsWith(base, ".")){
return true;
}
}
return false;
}
// is business shared folder matched
bool isSharedFolderMatched(string name)
{
// if there are no shared folder always return false
if (businessSharedFoldersList.empty) return false;
if (!name.matchFirst(businessSharedFoldersList).empty) {
return true;
} else {
return false;
}
}
// is business shared folder included
bool isPathIncluded(string path, string[] allowedPaths)
{
// always allow the root
if (path == ".") return true;
// if there are no allowed paths always return true
if (allowedPaths.empty) return true;
path = buildNormalizedPath(path);
foreach (allowed; allowedPaths) {
auto comm = commonPrefix(path, allowed);
if (comm.length == path.length) {
// the given path is contained in an allowed path
return true;
}
if (comm.length == allowed.length && path[comm.length] == '/') {
// the given path is a subitem of an allowed path
return true;
}
}
return false;
}
}
// test if the given path is not included in the allowed paths
// if there are no allowed paths always return false
private bool isPathExcluded(string path, string[] allowedPaths)
{
// always allow the root
if (path == ".") return false;
// if there are no allowed paths always return false
if (allowedPaths.empty) return false;
path = buildNormalizedPath(path);
foreach (allowed; allowedPaths) {
auto comm = commonPrefix(path, allowed);
if (comm.length == path.length) {
// the given path is contained in an allowed path
return false;
}
if (comm.length == allowed.length && path[comm.length] == '/') {
// the given path is a subitem of an allowed path
return false;
}
}
return true;
}
// test if the given path is matched by the regex expression.
// recursively test up the tree.
private bool isPathMatched(string path, Regex!char mask) {
path = buildNormalizedPath(path);
auto paths = pathSplitter(path);
string prefix = "";
foreach(base; paths) {
prefix ~= base;
if (!path.matchFirst(mask).empty) {
// the given path matches something which we should skip
return true;
}
prefix ~= dirSeparator;
}
return false;
}
// unit tests
unittest
{
assert(isPathExcluded("Documents2", ["Documents"]));
assert(!isPathExcluded("Documents", ["Documents"]));
assert(!isPathExcluded("Documents/a.txt", ["Documents"]));
assert(isPathExcluded("Hello/World", ["Hello/John"]));
assert(!isPathExcluded(".", ["Documents"]));
}