feat: add Redis cluster support and update CI workflow

- Added Redis cluster support with specialized handling for multi-key operations
- Implemented CRC16 slot calculation and key distribution logic for cluster operations
- Added special implementations for cluster commands (mget, mset, del, keys, etc.)
- Updated CI workflow to test against Redis cluster and nightly Julia builds
- Upgraded GitHub Actions dependencies (checkout@v4, cache@v4)
- Added hosts file configuration for TLS testing

Author: perchouli

.github/workflows/CI.yml

@@ -8,6 +8,7 @@ jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
     runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.version == 'nightly' }}
     strategy:
       fail-fast: false
       matrix:
@@ -20,29 +21,38 @@ jobs:
         arch:
           - x64
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         env:
           cache-name: cache-artifacts
         with:
           path: ~/.julia/artifacts
-          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
+          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('Project.toml') }}
           restore-keys: |
             ${{ runner.os }}-test-${{ env.cache-name }}-
             ${{ runner.os }}-test-
             ${{ runner.os }}-
       - uses: julia-actions/julia-buildpkg@v1
+      - name: Update /etc/hosts for TLS test
+        run: echo "127.0.0.1 redisjltest" | sudo tee -a /etc/hosts
       - name: Start redis server
         run: |
           echo "Starting redis server"
           pwd
           test/conf/redis.sh
           sleep 5
           echo "Redis started"
+      - name: Start redis cluster
+        run: |
+          echo "Starting redis cluster"
+          chmod +x test/conf/redis-cluster.sh
+          test/conf/redis-cluster.sh
+          sleep 10
+          echo "Redis cluster started"
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v3

src/Redis.jl

@@ -6,7 +6,7 @@ using MbedTLS
 import Base.get, Base.keys, Base.time
 
 export RedisException, ConnectionException, ServerException, ProtocolException, ClientException
-export RedisConnection, SentinelConnection, TransactionConnection, SubscriptionConnection,
+export RedisConnection, SentinelConnection, TransactionConnection, SubscriptionConnection, RedisClusterConnection, 
 disconnect, is_connected, open_transaction, reset_transaction, open_subscription,
 open_pipeline, read_pipeline
 # Key commands
@@ -65,5 +65,6 @@ include("connection.jl")
 include("parser.jl")
 include("client.jl")
 include("commands.jl")
+include("cluster_commands.jl")
 
 end

src/client.jl

@@ -1,5 +1,38 @@
 import DataStructures.OrderedSet
 
+const CLUSTER_MULTI_KEY_COMMANDS = Set([
+    # String commands - multi-key operations
+    "mget", "mset", "msetnx",
+
+    # Key commands - require same slot or special handling
+    "del", "rename", "renamenx", "keys", "randomkey",
+
+    # List commands - require same slot
+    "rpoplpush", "brpoplpush",
+
+    # Set commands - multi-key operations
+    "smove", "sdiff", "sinter", "sunion",
+    "sdiffstore", "sinterstore", "sunionstore",
+
+    # HyperLogLog commands - multi-key operations
+    "pfcount", "pfmerge",
+
+    # Sorted Set commands - multi-key operations
+    "zinterstore", "zunionstore",
+
+    # Bit commands - multi-key operations
+    "bitop",
+
+    # Script commands - may involve multiple keys
+    "eval", "evalsha",
+
+    # Server commands - need to broadcast to all nodes
+    "flushall", "flushdb", "_time",
+
+    # Pub/Sub commands - need special handling
+    "publish"
+])
+
 flatten(token) = string(token)
 flatten(token::Vector{UInt8}) = [token]
 flatten(token::String) = token
@@ -171,11 +204,14 @@ end
 macro redisfunction(command::AbstractString, ret_type, args...)
     is_exec = Symbol(command) == :exec
     func_name = esc(Symbol(command))
-    command = lstrip(command,'_')
-    command = split(command, '_')
+    command_str = lstrip(command, '_')
+    command = split(command_str, '_')
+    
+    # Check if command needs special cluster handling (multi-key commands)
+    needs_special_cluster_handling = command_str in CLUSTER_MULTI_KEY_COMMANDS
 
     if length(args) > 0
-        return quote
+        base_functions = quote
             function $(func_name)(conn::RedisConnection, $(args...))
                 response = execute_command(conn, flatten_command($(command...), $(args...)))
                 convert_response($ret_type, response)
@@ -191,6 +227,17 @@ macro redisfunction(command::AbstractString, ret_type, args...)
                 execute_command_without_reply(conn, flatten_command($(command...), $(args...)))
             end
         end
+
+        if !needs_special_cluster_handling
+            push!(base_functions.args, :(
+                function $(func_name)(conn::RedisClusterConnection, $(args...))
+                    response = execute_command(conn, flatten_command($(command...), $(args...)))
+                    convert_response($ret_type, response)
+                end
+            ))
+        end
+        return base_functions
+
     else
         q1 = quote
             function $(func_name)(conn::RedisConnection)
@@ -209,12 +256,24 @@ macro redisfunction(command::AbstractString, ret_type, args...)
                 conn.num_commands += 1
             end
         end
+
+        exprs = [q1.args[2]]
+        if !needs_special_cluster_handling
+            q1_cluster = quote
+                function $(func_name)(conn::RedisClusterConnection)
+                    response = execute_command(conn, flatten_command($(command...)))
+                    convert_response($ret_type, response)
+                end
+            end
+            push!(exprs, q1_cluster.args[2])
+        end
+
         # To avoid redefining `function exec(conn::TransactionConnection)`
-        if is_exec
-            return Expr(:block, q1.args[2], q3.args[2])
-        else
-            return Expr(:block, q1.args[2], q2.args[2], q3.args[2])
+        if !is_exec
+            push!(exprs, q2.args[2])
         end
+        push!(exprs, q3.args[2])
+        return Expr(:block, exprs...)
     end
 end