Fetch: handle compressed git+http

lib/std/http.zig

@@ -292,6 +292,14 @@ pub const ContentEncoding = enum {
         });
         return map.get(s);
     }
+
+    pub fn minBufferCapacity(ce: ContentEncoding) usize {
+        return switch (ce) {
+            .zstd => std.compress.zstd.default_window_len,
+            .gzip, .deflate => std.compress.flate.max_window_len,
+            .compress, .identity => 0,
+        };
+    }
 };
 
 pub const Connection = enum {
@@ -464,8 +472,8 @@ pub const Reader = struct {
         transfer_encoding: TransferEncoding,
         content_length: ?u64,
         content_encoding: ContentEncoding,
-        decompressor: *Decompressor,
-        decompression_buffer: []u8,
+        decompress: *Decompress,
+        decompress_buffer: []u8,
     ) *std.Io.Reader {
         if (transfer_encoding == .none and content_length == null) {
             assert(reader.state == .received_head);
@@ -475,22 +483,22 @@ pub const Reader = struct {
                     return reader.in;
                 },
                 .deflate => {
-                    decompressor.* = .{ .flate = .init(reader.in, .zlib, decompression_buffer) };
-                    return &decompressor.flate.reader;
+                    decompress.* = .{ .flate = .init(reader.in, .zlib, decompress_buffer) };
+                    return &decompress.flate.reader;
                 },
                 .gzip => {
-                    decompressor.* = .{ .flate = .init(reader.in, .gzip, decompression_buffer) };
-                    return &decompressor.flate.reader;
+                    decompress.* = .{ .flate = .init(reader.in, .gzip, decompress_buffer) };
+                    return &decompress.flate.reader;
                 },
                 .zstd => {
-                    decompressor.* = .{ .zstd = .init(reader.in, decompression_buffer, .{ .verify_checksum = false }) };
-                    return &decompressor.zstd.reader;
+                    decompress.* = .{ .zstd = .init(reader.in, decompress_buffer, .{ .verify_checksum = false }) };
+                    return &decompress.zstd.reader;
                 },
                 .compress => unreachable,
             }
         }
         const transfer_reader = bodyReader(reader, transfer_buffer, transfer_encoding, content_length);
-        return decompressor.init(transfer_reader, decompression_buffer, content_encoding);
+        return decompress.init(transfer_reader, decompress_buffer, content_encoding);
     }
 
     fn contentLengthStream(
@@ -692,33 +700,33 @@ pub const Reader = struct {
     }
 };
 
-pub const Decompressor = union(enum) {
+pub const Decompress = union(enum) {
     flate: std.compress.flate.Decompress,
     zstd: std.compress.zstd.Decompress,
     none: *std.Io.Reader,
 
     pub fn init(
-        decompressor: *Decompressor,
+        decompress: *Decompress,
         transfer_reader: *std.Io.Reader,
         buffer: []u8,
         content_encoding: ContentEncoding,
     ) *std.Io.Reader {
         switch (content_encoding) {
             .identity => {
-                decompressor.* = .{ .none = transfer_reader };
+                decompress.* = .{ .none = transfer_reader };
                 return transfer_reader;
             },
             .deflate => {
-                decompressor.* = .{ .flate = .init(transfer_reader, .zlib, buffer) };
-                return &decompressor.flate.reader;
+                decompress.* = .{ .flate = .init(transfer_reader, .zlib, buffer) };
+                return &decompress.flate.reader;
             },
             .gzip => {
-                decompressor.* = .{ .flate = .init(transfer_reader, .gzip, buffer) };
-                return &decompressor.flate.reader;
+                decompress.* = .{ .flate = .init(transfer_reader, .gzip, buffer) };
+                return &decompress.flate.reader;
             },
             .zstd => {
-                decompressor.* = .{ .zstd = .init(transfer_reader, buffer, .{ .verify_checksum = false }) };
-                return &decompressor.zstd.reader;
+                decompress.* = .{ .zstd = .init(transfer_reader, buffer, .{ .verify_checksum = false }) };
+                return &decompress.zstd.reader;
             },
             .compress => unreachable,
         }

lib/std/http/Client.zig

@@ -724,8 +724,8 @@ pub const Response = struct {
     pub fn readerDecompressing(
         response: *Response,
         transfer_buffer: []u8,
-        decompressor: *http.Decompressor,
-        decompression_buffer: []u8,
+        decompress: *http.Decompress,
+        decompress_buffer: []u8,
     ) *Reader {
         response.head.invalidateStrings();
         const head = &response.head;
@@ -734,8 +734,8 @@ pub const Response = struct {
             head.transfer_encoding,
             head.content_length,
             head.content_encoding,
-            decompressor,
-            decompression_buffer,
+            decompress,
+            decompress_buffer,
         );
     }
 
@@ -1797,8 +1797,8 @@ pub fn fetch(client: *Client, options: FetchOptions) FetchError!FetchResult {
     defer if (options.decompress_buffer == null) client.allocator.free(decompress_buffer);
 
     var transfer_buffer: [64]u8 = undefined;
-    var decompressor: http.Decompressor = undefined;
-    const reader = response.readerDecompressing(&transfer_buffer, &decompressor, decompress_buffer);
+    var decompress: http.Decompress = undefined;
+    const reader = response.readerDecompressing(&transfer_buffer, &decompress, decompress_buffer);
 
     _ = reader.streamRemaining(response_writer) catch |err| switch (err) {
         error.ReadFailed => return response.bodyErr().?,