Cleaned up the helper scripts, added a brief README. (#271)

Scripts/README.md

@@ -0,0 +1,50 @@
+# Helper Scripts
+The `Scripts` directory contains a set of useful scripts to be used during development, continuous integration, testing and packaging.
+
+## `build_for_codeql.sh`
+Builds tests and the main application without running so that CodeQL can intercept the commands and perform its analysis afterwards.  
+`xcodebuild` and `xcpretty` must be available in the environment in order for this script to run.  
+
+## `build_nightly.sh`
+Builds Nimble Commander with the `NimbleCommander-NonMAS` scheme / `Release` configuration, signs it, packages the runnable build into a `.dmg` image and notarizes the final image.  
+`xcodebuild`, `xcpretty` and `create-dmg` must be available in the environment in order for this script to run.  
+It also requires the codesigning certificate to be properly signed.  
+
+## `build_unsigned.sh`
+Builds Nimble Commander with the `NimbleCommander-Unsigned` scheme / `Release` configuration and packages the runnable build into a `.dmg` image.  
+`xcodebuild`, `xcpretty` and `create-dmg` must be available in the environment in order for this script to run.  
+
+## `build_unsigned_and_run.sh`
+Builds Nimble Commander with the `NimbleCommander-Unsigned` scheme / `Debug` configuration and runs it afterwards.  
+`xcodebuild` must be available in the environment in order for this script to run.
+
+## `run_all_integration_tests.sh`
+Builds and executes all integration tests with the Debug/ASAN configuration.  
+`xcodebuild` and `xcpretty` must be available in the environment in order for this script to run.  
+`docker` must be available to run the VMs required for NC's virtual file systems.  
+
+## `run_all_unit_tests.sh [Debug|Release|ASAN|UBSAN]`
+Builds and executes all unit tests with the specified configuration.  
+`xcodebuild` and `xcpretty` must be available in the environment in order for this script to run.  
+
+## `run_clang_format.sh`
+Executes `clang-format` against all source files in the `Source` directory, re-formatting them in-place if necessary.  
+Rules from `Source/.clang-format` are used in the process.  
+`clang-format` must be available in order for this script to run.
+
+## `run_clang_tidy.sh`
+Executes `clang-tidy` against all source files in the `Source` directory, updating them in-place if necessary.  
+`xcodebuild`, `xcpretty` and `jq` must be available in the environment in order for this script to run.  
+`clang-tidy` must be installed via Brew and is expected to be located at `/usr/local/opt/llvm/bin/`.  
+Rules from `Source/.clang-tidy` are used in the process.  
+It's recommended to execute `run_clang_format.sh` afterwards.
+
+## Dependencies installation:
+  * xcodebuild:
+    * XCode: https://download.developer.apple.com/Developer_Tools/Xcode_15.1/Xcode_15.1.xip
+    * Or just build tools: https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_for_Xcode_15.1/Command_Line_Tools_for_Xcode_15.1.dmg
+  * [xcpretty](https://github.com/xcpretty/xcpretty): `gem install xcpretty`
+  * [clang-format](https://clang.llvm.org/docs/ClangFormat.html): `brew install clang-format`
+  * [clang-tidy](https://clang.llvm.org/extra/clang-tidy/): `brew install llvm`
+  * [jq](https://jqlang.github.io/jq/): `brew install jq`
+  * [create-dmg](https://github.com/create-dmg/create-dmg): `brew install create-dmg`

Scripts/build_nightly.sh

@@ -28,15 +28,6 @@ BUILT_PATH="${BUILD_DIR}/built"
 mkdir -p "${BUILD_DIR}"
 mkdir -p "${ARCHIVE_PATH}"
 
-# Enable caching with ccache if it's available in the system
-if type -p /usr/local/bin/ccache >/dev/null 2>&1; then
-    echo Using ccache
-    export CCACHE_BASEDIR="${ROOT_DIR}"
-    export CCACHE_SLOPPINESS=time_macros,include_file_mtime,include_file_ctime,file_stat_matches
-    export CC="${SCRIPTS_DIR}/ccache-clang"
-    export CXX="${SCRIPTS_DIR}/ccache-clang++"
-fi
-
 # Gather common flags in the XC variable
 XC="xcodebuild \
  -project ${XCODEPROJ} \

Scripts/build_unsigned.sh

@@ -30,14 +30,6 @@ XCODEPROJ="../Source/NimbleCommander/NimbleCommander.xcodeproj"
 
 PBUDDY=/usr/libexec/PlistBuddy
 
-if type -p /usr/local/bin/ccache >/dev/null 2>&1; then
-    echo Using ccache
-    export CCACHE_BASEDIR="${ROOT_DIR}"
-    export CCACHE_SLOPPINESS=time_macros,include_file_mtime,include_file_ctime,file_stat_matches
-    export CC="${SCRIPTS_DIR}/ccache-clang"
-    export CXX="${SCRIPTS_DIR}/ccache-clang++"
-fi
-
 XC="xcodebuild \
  -project ${XCODEPROJ} \
  -scheme NimbleCommander-NonMAS \

Scripts/run_all_unit_tests.sh

@@ -25,14 +25,6 @@ XCODEPROJ="../Source/NimbleCommander/NimbleCommander.xcodeproj"
 
 LOG_FILE=${BUILD_DIR}/xcodebuild.log
 
-if type -p /usr/local/bin/ccache >/dev/null 2>&1; then
-    echo Using ccache
-    export CCACHE_BASEDIR="${ROOT_DIR}"
-    export CCACHE_SLOPPINESS=time_macros,include_file_mtime,include_file_ctime,file_stat_matches
-    export CC="${SCRIPTS_DIR}/ccache-clang"
-    export CXX="${SCRIPTS_DIR}/ccache-clang++"
-fi
-
 build_target()
 {
     TARGET=$1