Implementing a read-only projection of the conserve archive for Windows

.github/workflows/rust.yml

@@ -26,7 +26,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
         features: ["", "s3"]
-        version: [stable, nightly, "1.73"]
+        version: [stable, nightly, "1.75"]
 
     steps:
       - uses: actions/checkout@v3
@@ -43,8 +43,7 @@ jobs:
           cargo --version
           rustc --version
       - name: Build
-        run:
-          cargo build --all-targets --no-default-features --features=${{
+        run: cargo build --all-targets --no-default-features --features=${{
           matrix.features }}
       - name: Test
         run:
@@ -77,8 +76,7 @@ jobs:
         # Can't use --all-features here because BLAKE2 SIMD needs unstable...
         # Don't use the S3 features because they require AWS credentials for realistic
         # testing.
-        run:
-          cargo mutants -j2 --no-shuffle -vV --cargo-arg --no-default-features
+        run: cargo mutants -j2 --no-shuffle -vV --cargo-arg --no-default-features
       - name: Archive results
         uses: actions/upload-artifact@v3
         with:

Cargo.toml

@@ -9,7 +9,7 @@ name = "conserve"
 readme = "README.md"
 repository = "https://github.com/sourcefrog/conserve/"
 version = "23.11.0"
-rust-version = "1.73"
+rust-version = "1.75"
 
 [[bin]]
 doc = false
@@ -64,6 +64,9 @@ indoc = "2.0"
 uzers = "0.11"
 nix = { version = "0.27", features = ["fs", "user"] }
 
+[target.'cfg(windows)'.dependencies]
+windows-projfs = { version = "0.1.6", features = ["dynamic-import"] }
+
 [dependencies.clap]
 version = "4.3"
 features = ["derive", "deprecated", "wrap_help"]

src/bin/conserve.rs

@@ -170,6 +170,21 @@ enum Command {
         long_listing: bool,
     },
 
+    /// Mount the archive as projection.
+    #[cfg(windows)]
+    Mount {
+        /// The archive to mount
+        archive: String,
+
+        /// Target folder where the archive should be mounted to
+        destination: PathBuf,
+
+        /// Create the target folder and remove all temporarly created
+        /// files on exit
+        #[arg(long, default_value_t = true)]
+        cleanup: bool,
+    },
+
     /// Copy a stored tree to a restore directory.
     Restore {
         archive: String,
@@ -457,6 +472,15 @@ impl Command {
                     show::show_entry_names(entry_iter, &mut stdout, *long_listing)?;
                 }
             }
+            #[cfg(windows)]
+            Command::Mount {
+                archive,
+                destination,
+                cleanup,
+            } => {
+                let archive = Archive::open(open_transport(archive)?)?;
+                mount(archive, destination, *cleanup)?;
+            }
             Command::Restore {
                 archive,
                 destination,

src/errors.rs

@@ -158,6 +158,13 @@ pub enum Error {
         #[from]
         source: transport::Error,
     },
+
+    #[cfg(windows)]
+    #[error(transparent)]
+    Projection {
+        #[from]
+        source: windows_projfs::Error,
+    },
 }
 
 impl From<jsonio::Error> for Error {