wip: feat: accept config in Db

src/Config.zig

@@ -1,7 +1,9 @@
 const std = @import("std");
 
 /// Keys that are available for encryption
-keys: []const SSHKeyPair,
+keys: []const SSHKeyPair = &.{
+    .from_pub_path("~/.ssh/id_ed25519.pub"),
+},
 
 /// Rules for how to match the scan command
 scan: ScanConfig = .default,
@@ -12,11 +14,11 @@ pub const SSHKeyPair = struct {
 
     /// Caller owns the returned memory
     pub fn from_path(gpa: std.mem.Allocator, path: []const u8) !SSHKeyPair {
-        if (std.mem.eql(u8, std.fs.path.extension(path), ".pub")){
+        if (std.mem.eql(u8, std.fs.path.extension(path), ".pub")) {
             return from_pub_path(path);
         } else {
             return .{
-                .public = try std.mem.concat(gpa, u8, &.{path, ".pub"}),
+                .public = try std.mem.concat(gpa, u8, &.{ path, ".pub" }),
                 .private = path,
             };
         }
@@ -27,7 +29,7 @@ pub const SSHKeyPair = struct {
 
         return .{
             .public = path,
-            .private = path[0..path.len - 4],
+            .private = path[0 .. path.len - 4],
         };
     }
 };
@@ -119,7 +121,7 @@ test "saving to a new file upserts the file" {
 
     var cfg: @This() = .{
         .keys = &.{
-          .from_pub_path("~/.ssh/id_ed25519.pub"),
+            .from_pub_path("~/.ssh/id_ed25519.pub"),
         },
     };
 

src/Db.zig

@@ -0,0 +1,262 @@
+//! Db interacts with an age encrypted sqlite database.
+//!
+const std = @import("std");
+const sqlite = @import("sqlite");
+
+const age = @import("age.zig");
+const Config = @import("Config.zig");
+
+/// controls the keys and filepaths used for saving
+config: Config,
+
+/// The underlying data store.
+sql_db: sqlite.Db,
+
+/// Set to true whenever the data updates. If false when close() is called,
+/// the database will be closed without saving
+changed: bool = false,
+
+/// Decrypts the database into a temporary file and opens it in memory
+// FIXME: Test me with real file
+pub fn open(
+    io: std.Io,
+    gpa: std.mem.Allocator,
+    opts: OpenOptions,
+) !@This() {
+    // TODO: Read from config?
+    const db_path = try std.fs.path.join(gpa, &.{ opts.home, ".envr", "data.age" });
+    defer gpa.free(db_path);
+
+    var db = try new(opts.config);
+
+    if (db_exists(io, db_path)) {
+        // const tmp_dir = try std.Io.Dir.cwd().openDir(io, tmp, .{});
+        // defer tmp_dir.deleteFile(io, "envr.db");
+
+        const tmp_db_path = try std.fs.path.join(gpa, &.{ opts.tmp, "envr.db" });
+        defer gpa.free(tmp_db_path);
+
+        // TODO: Pass key(s) from Config
+        try age.decrypt(io, gpa, &.{"~/.ssh/id_ed25519"}, db_path, tmp_db_path);
+
+        try db.restore(tmp_db_path);
+        try std.Io.Dir.cwd().deleteFile(io, tmp_db_path);
+
+        return db;
+    } else {
+        return db;
+    }
+}
+
+const OpenOptions = struct {
+    config: Config = .{},
+
+    /// The path to the home directory
+    home: []const u8 = "~/",
+    /// The path to the /tmp directory
+    // FIXME: Support windows
+    tmp: []const u8 = "/tmp",
+};
+
+/// Create a new instance of the database in-memory
+fn new(config: Config) !@This() {
+    var db = try sqlite.Db.init(.{
+        .mode = .Memory,
+        .open_flags = .{ .write = true, .create = true },
+        .threading_mode = .MultiThread,
+    });
+
+    try db.exec(
+        \\create table envr_env_files (
+        \\  path text primary key not null
+        \\, remotes text -- JSON
+        \\, sha256 text not null
+        \\, contents text not null
+        \\)
+    , .{}, .{});
+
+    return .{
+        .sql_db = db,
+        .config = config,
+    };
+}
+
+/// Returns true if a file exists at ~/.envr/data.age
+fn db_exists(io: std.Io, path: []const u8) bool {
+    if (std.Io.Dir.cwd().access(io, path, .{ .read = true })) {
+        return true;
+    } else |_| {
+        return false;
+    }
+}
+
+/// Loads the unencrypted sqlite db at filepath path into the datbase
+/// FIXME: Test me
+fn restore(
+    self: *@This(),
+    path: []const u8,
+) !void {
+    try self.sql_db.exec(
+        "ATTACH DATABASE ? AS source",
+        .{},
+        .{path},
+    );
+    defer self.sql_db.exec("DETACH DATABASE source", .{}, .{}) catch unreachable;
+
+    try self.sql_db.exec(
+        "INSERT INTO main.envr_env_files SELECT * FROM source.envr_env_files",
+        .{},
+        .{},
+    );
+}
+
+// TODO: Finish
+// pub fn tmpDir(opts: std.fs.Dir.OpenDirOptions) TmpDir {
+//     var random_bytes: [TmpDir.random_bytes_count]u8 = undefined;
+//     std.crypto.random.bytes(&random_bytes);
+//     var sub_path: [TmpDir.sub_path_len]u8 = undefined;
+//     _ = std.fs.base64_encoder.encode(&sub_path, &random_bytes);
+// }
+//
+// const TmpDir = struct {};
+
+/// Close the database
+/// FIXME: Test me with data but no changes
+/// FIXME: Test me with data and changes
+pub fn close(
+    self: *@This(),
+    io: std.Io,
+    gpa: std.mem.Allocator,
+    home: []const u8,
+    tmp: []const u8,
+) !void {
+    defer self.sql_db.deinit();
+
+    if (self.changed) {
+        const tmp_db_path = try std.fs.path.join(gpa, &.{ tmp, "envr.db" });
+        defer gpa.free(tmp_db_path);
+
+        try self.sql_db.exec("VACUUM INTO ?", .{}, .{tmp_db_path});
+
+        const db_path = try std.fs.path.join(gpa, &.{ home, ".envr", "data.age" });
+        defer gpa.free(db_path);
+
+        // FIXME: Use real key
+        try age.encrypt(io, gpa, &.{"~/.ssh/id_ed25519.pub"}, tmp_db_path, db_path);
+
+        self.changed = false;
+    }
+}
+
+test {
+    std.testing.refAllDecls(@import("age.zig"));
+}
+
+test "simple database can be opened" {
+    var db = try sqlite.Db.init(.{
+        .mode = sqlite.Db.Mode{ .File = "./fixtures/example.db" },
+        .open_flags = .{
+            .write = false,
+            .create = false,
+        },
+        .threading_mode = .MultiThread,
+    });
+
+    var stmt = try db.prepare("SELECT * FROM hello");
+    defer stmt.deinit();
+
+    const alloc = std.testing.allocator;
+
+    if (try stmt.oneAlloc(struct { text: []const u8 }, alloc, .{}, .{})) |got| {
+        defer alloc.free(got.text);
+
+        try std.testing.expectEqualSlices(u8, "world!", got.text);
+    } else {
+        return error.TestUnexpectedResult;
+    }
+}
+
+test "encrypted database can be opened" {
+    const io = std.testing.io;
+    const gpa = std.testing.allocator;
+
+    var tmp = std.testing.tmpDir(.{});
+    defer tmp.cleanup();
+
+    const dir_path = try tmp.dir.realPathFileAlloc(io, ".", gpa);
+    defer gpa.free(dir_path);
+
+    const decrypted_path = try std.fs.path.joinZ(gpa, &.{ dir_path, "example.db" });
+    defer gpa.free(decrypted_path);
+
+    try age.decrypt(
+        io,
+        gpa,
+        &.{"./fixtures/insecure-test-key"},
+        "./fixtures/encrypted-example.db.age",
+        decrypted_path,
+    );
+
+    var db = try sqlite.Db.init(.{
+        .mode = sqlite.Db.Mode{ .File = decrypted_path },
+        .open_flags = .{
+            .write = false,
+            .create = false,
+        },
+        .threading_mode = .MultiThread,
+    });
+
+    var stmt = try db.prepare("SELECT * FROM hello");
+    defer stmt.deinit();
+
+    const alloc = std.testing.allocator;
+
+    if (try stmt.oneAlloc(struct { text: []const u8 }, alloc, .{}, .{})) |got| {
+        defer alloc.free(got.text);
+
+        try std.testing.expectEqualSlices(u8, "world!", got.text);
+    } else {
+        return error.TestUnexpectedResult;
+    }
+}
+
+test "Closing a fresh database does not create a file" {
+    const io = std.testing.io;
+    const gpa = std.testing.allocator;
+
+    var tmp_dir = std.testing.tmpDir(.{});
+    defer tmp_dir.cleanup();
+
+    // @compileLog(@typeInfo(std.Io.File.Permissions));
+    try tmp_dir.dir.createDir(io, "home", .default_dir);
+    try tmp_dir.dir.createDir(io, "tmp", .default_dir);
+
+    const tmp_dir_path = try tmp_dir.dir.realPathFileAlloc(io, ".", gpa);
+    defer gpa.free(tmp_dir_path);
+
+    const home = try std.fs.path.join(gpa, &.{ tmp_dir_path, "home" });
+    defer gpa.free(home);
+    const tmp = try std.fs.path.join(gpa, &.{ tmp_dir_path, "tmp" });
+    defer gpa.free(tmp);
+
+    var db: @This() = try .open(io, gpa, .{ .home = home, .tmp = tmp });
+
+    const db_path = try std.fs.path.join(gpa, &.{ home, ".envr", "data.age" });
+    defer gpa.free(db_path);
+
+    try std.testing.expectError(
+        error.FileNotFound,
+        tmp_dir.dir.access(io, db_path, .{ .read = true }),
+    );
+
+    try db.close(io, gpa, home, tmp);
+
+    try std.testing.expectError(
+        error.FileNotFound,
+        tmp_dir.dir.access(io, db_path, .{ .read = true }),
+    );
+}
+
+// test "Closing an unmodified database does not update the file" {}
+
+// test "Closing a modified database does create a file" {}

src/age.zig

@@ -1,24 +1,32 @@
 const std = @import("std");
 
-/// Returns the decrypted contents of the file.
-/// Caller is responsible for freeing the memory.
+/// Decrypts the file into output path
 pub fn decrypt(
     io: std.Io,
     gpa: std.mem.Allocator,
-    private_key: []const u8,
+    private_keys: []const []const u8,
     input_path: []const u8,
     output_path: []const u8,
 ) !void {
+    // TODO: use raw array?
+    var argv: std.ArrayList([]const u8) = try .initCapacity(gpa, 2 + (2 * private_keys.len) + 3);
+    defer argv.deinit(gpa);
+
+    argv.appendAssumeCapacity("age");
+    argv.appendAssumeCapacity("-d");
+
+    for (private_keys) |key| {
+        argv.appendAssumeCapacity("-i");
+        argv.appendAssumeCapacity(key);
+    }
+
+    argv.appendAssumeCapacity("-o");
+    argv.appendAssumeCapacity(output_path);
+
+    argv.appendAssumeCapacity(input_path);
+
     const result = try std.process.run(gpa, io, .{
-        .argv = &.{
-            "age",
-            "-d",
-            "-i",
-            private_key,
-            "-o",
-            output_path,
-            input_path,
-        },
+        .argv = argv.items,
     });
     defer gpa.free(result.stderr);
     defer gpa.free(result.stdout);
@@ -34,25 +42,33 @@ pub fn decrypt(
     }
 }
 
-/// Returns the encrypted contents of the file.
-/// Caller is responsible for freeing the memory.
+/// Encrypts the file into output path
 pub fn encrypt(
     io: std.Io,
     gpa: std.mem.Allocator,
-    public_key: []const u8,
+    // TODO: Accept multiple keys
+    public_keys: []const []const u8,
     input_path: []const u8,
     output_path: []const u8,
 ) !void {
+    var argv: std.ArrayList([]const u8) = try .initCapacity(gpa, 2 + (2 * public_keys.len) + 3);
+    defer argv.deinit(gpa);
+
+    argv.appendAssumeCapacity("age");
+    argv.appendAssumeCapacity("-e");
+
+    for (public_keys) |key| {
+        argv.appendAssumeCapacity("-R");
+        argv.appendAssumeCapacity(key);
+    }
+
+    argv.appendAssumeCapacity("-o");
+    argv.appendAssumeCapacity(output_path);
+
+    argv.appendAssumeCapacity(input_path);
+
     const result = try std.process.run(gpa, io, .{
-        .argv = &.{
-            "age",
-            "-e",
-            "-R",
-            public_key,
-            "-o",
-            output_path,
-            input_path,
-        },
+        .argv = argv.items,
     });
     defer gpa.free(result.stderr);
     defer gpa.free(result.stdout);
@@ -84,7 +100,7 @@ test "sample file can be decrypted" {
     try decrypt(
         io,
         gpa,
-        "./fixtures/insecure-test-key",
+        &.{"./fixtures/insecure-test-key"},
         "./fixtures/hello-world.age",
         output_path,
     );
@@ -111,7 +127,7 @@ test "sample file can be encrypted" {
     try encrypt(
         io,
         gpa,
-        "./fixtures/insecure-test-key.pub",
+        &.{"./fixtures/insecure-test-key.pub"},
         "./fixtures/hello-world.txt",
         output_path,
     );
@@ -125,9 +141,13 @@ test "sample file can be encrypted" {
         gpa,
         .unlimited,
     );
+    defer gpa.free(want);
 
     const contents = try tmp.dir.readFileAlloc(io, output_path, gpa, .unlimited);
     defer gpa.free(contents);
 
-    try std.testing.expectEqualSlices(u8, want, got);
+    try std.testing.expectEqual(want.len, got.len);
+
+    // FIXME: Test that decrypted file contents match
+    // try std.testing.expectEqualSlices(u8, "Hello, World!\n", decrypted_contents);
 }

src/db.zig

@@ -1,76 +0,0 @@
-const std = @import("std");
-const sqlite = @import("sqlite");
-
-const age = @import("age.zig");
-
-test {
-    std.testing.refAllDecls(@import("age.zig"));
-}
-
-test "simple database can be opened" {
-    var db = try sqlite.Db.init(.{
-        .mode = sqlite.Db.Mode{ .File = "./fixtures/example.db" },
-        .open_flags = .{
-            .write = false,
-            .create = false,
-        },
-        .threading_mode = .MultiThread,
-    });
-
-    var stmt = try db.prepare("SELECT * FROM hello");
-    defer stmt.deinit();
-
-    const alloc = std.testing.allocator;
-
-    if (try stmt.oneAlloc(struct { text: []const u8 }, alloc, .{}, .{})) |got| {
-        defer alloc.free(got.text);
-
-        try std.testing.expectEqualSlices(u8, "world!", got.text);
-    } else {
-        return error.TestUnexpectedResult;
-    }
-}
-
-test "encrypted database can be opened" {
-    const io = std.testing.io;
-    const gpa = std.testing.allocator;
-
-    var tmp = std.testing.tmpDir(.{});
-    defer tmp.cleanup();
-
-    const dir_path = try tmp.dir.realPathFileAlloc(io, ".", gpa);
-    defer gpa.free(dir_path);
-
-    const decrypted_path = try std.fs.path.joinZ(gpa, &.{ dir_path, "example.db" });
-    defer gpa.free(decrypted_path);
-
-    try age.decrypt(
-        io,
-        gpa,
-        "./fixtures/insecure-test-key",
-        "./fixtures/encrypted-example.db.age",
-        decrypted_path,
-    );
-
-    var db = try sqlite.Db.init(.{
-        .mode = sqlite.Db.Mode{ .File = decrypted_path },
-        .open_flags = .{
-            .write = false,
-            .create = false,
-        },
-        .threading_mode = .MultiThread,
-    });
-
-    var stmt = try db.prepare("SELECT * FROM hello");
-    defer stmt.deinit();
-
-    const alloc = std.testing.allocator;
-
-    if (try stmt.oneAlloc(struct { text: []const u8 }, alloc, .{}, .{})) |got| {
-        defer alloc.free(got.text);
-
-        try std.testing.expectEqualSlices(u8, "world!", got.text);
-    } else {
-        return error.TestUnexpectedResult;
-    }
-}

src/root.zig

@@ -57,7 +57,8 @@ pub const root: Command = .new(.{
 });
 
 test {
-    std.testing.refAllDecls(@import("db.zig"));
+    std.testing.refAllDecls(@import("Config.zig"));
+    std.testing.refAllDecls(@import("Db.zig"));
 }
 
 test "enum type" {