fix: portable, clear old files (#7802)

* fix: portable, clear old files

Signed-off-by: fufesou <shuanglongchen@yeah.net>

* fix build

Signed-off-by: fufesou <shuanglongchen@yeah.net>

---------

Signed-off-by: fufesou <shuanglongchen@yeah.net>

libs/portable/generate.py

@@ -4,6 +4,7 @@ import os
 import optparse
 from hashlib import md5
 import brotli
+import datetime
 
 # 4GB maximum
 length_count = 4
@@ -22,7 +23,7 @@ def generate_md5_table(folder: str, level) -> dict:
         for f in files:
             md5_generator = md5()
             full_path = os.path.join(root, f)
-            print(f"processing {full_path}...")
+            print(f"Processing {full_path}...")
             f = open(full_path, "rb")
             content = f.read()
             content_compressed = brotli.compress(
@@ -34,7 +35,7 @@ def generate_md5_table(folder: str, level) -> dict:
     return res
 
 
-def write_metadata(md5_table: dict, output_folder: str, exe: str):
+def write_package_metadata(md5_table: dict, output_folder: str, exe: str):
     output_path = os.path.join(output_folder, "data.bin")
     with open(output_path, "wb") as f:
         f.write("rustdesk".encode(encoding=encoding))
@@ -55,8 +56,13 @@ def write_metadata(md5_table: dict, output_folder: str, exe: str):
         f.write("rustdesk".encode(encoding=encoding))
         # executable
         f.write(exe.encode(encoding='utf-8'))
-    print(f"metadata had written to {output_path}")
+    print(f"Metadata has been written to {output_path}")
 
+def write_app_metadata(output_folder: str):
+    output_path = os.path.join(output_folder, "app_metadata.toml")
+    with open(output_path, "w") as f:
+        f.write(f"timestamp = {int(datetime.datetime.now().timestamp() * 1000)}\n")
+    print(f"App metadata has been written to {output_path}")
 
 def build_portable(output_folder: str, target: str):
     os.chdir(output_folder)
@@ -91,11 +97,12 @@ if __name__ == '__main__':
         options.executable = folder + '/' + options.executable
     exe: str = os.path.abspath(options.executable)
     if not exe.startswith(os.path.abspath(folder)):
-        print("the executable must locate in source folder")
+        print("The executable must locate in source folder")
         exit(-1)
     exe = '.' + exe[len(os.path.abspath(folder)):]
-    print("executable path: " + exe)
-    print("compression level: " + str(options.level))
+    print("Executable path: " + exe)
+    print("Compression level: " + str(options.level))
     md5_table = generate_md5_table(folder, options.level)
-    write_metadata(md5_table, output_folder, exe)
+    write_package_metadata(md5_table, output_folder, exe)
+    write_app_metadata(output_folder)
     build_portable(output_folder, options.target)

libs/portable/src/main.rs

@@ -9,9 +9,52 @@ use bin_reader::BinaryReader;
 
 pub mod bin_reader;
 
+#[cfg(windows)]
+const APP_METADATA: &[u8] = include_bytes!("../app_metadata.toml");
+#[cfg(not(windows))]
+const APP_METADATA: &[u8] = &[];
+const APP_METADATA_CONFIG: &str = "meta.toml";
+const META_LINE_PREFIX_TIMESTAMP: &str = "timestamp = ";
 const APP_PREFIX: &str = "rustdesk";
 const APPNAME_RUNTIME_ENV_KEY: &str = "RUSTDESK_APPNAME";
 
+fn is_timestamp_matches(dir: &PathBuf, ts: &mut u64) -> bool {
+    let Ok(app_metadata) = std::str::from_utf8(APP_METADATA) else {
+        return true;
+    };
+    for line in app_metadata.lines() {
+        if line.starts_with(META_LINE_PREFIX_TIMESTAMP) {
+            if let Ok(stored_ts) = line.replace(META_LINE_PREFIX_TIMESTAMP, "").parse::<u64>() {
+                *ts = stored_ts;
+                break;
+            }
+        }
+    }
+    if *ts == 0 {
+        return true;
+    }
+
+    if let Ok(content) = std::fs::read_to_string(dir.join(APP_METADATA_CONFIG)) {
+        for line in content.lines() {
+            if line.starts_with(META_LINE_PREFIX_TIMESTAMP) {
+                if let Ok(stored_ts) = line.replace(META_LINE_PREFIX_TIMESTAMP, "").parse::<u64>() {
+                    return *ts == stored_ts;
+                }
+            }
+        }
+    }
+    false
+}
+
+fn write_meta(dir: &PathBuf, ts: u64) {
+    let meta_file = dir.join(APP_METADATA_CONFIG);
+    if ts != 0 {
+        let content = format!("{}{}", META_LINE_PREFIX_TIMESTAMP, ts);
+        // Ignore is ok here
+        let _ = std::fs::write(meta_file, content);
+    }
+}
+
 fn setup(reader: BinaryReader, dir: Option<PathBuf>, clear: bool) -> Option<PathBuf> {
     let dir = if let Some(dir) = dir {
         dir
@@ -24,12 +67,15 @@ fn setup(reader: BinaryReader, dir: Option<PathBuf>, clear: bool) -> Option<Path
             return None;
         }
     };
-    if clear {
+
+    let mut ts = 0;
+    if clear || !is_timestamp_matches(&dir, &mut ts) {
         std::fs::remove_dir_all(&dir).ok();
     }
     for file in reader.files.iter() {
         file.write_to_file(&dir);
     }
+    write_meta(&dir, ts);
     #[cfg(windows)]
     windows::copy_runtime_broker(&dir);
     #[cfg(linux)]