README.md, UPDATE.md added. Fixes and tweaks. Ready for CI

.gitignore

@@ -1,2 +1,7 @@
 v8
-.cipd
+.cipd
+build_results
+.gclient
+.gclient_entries
+.gclient_previous_sync_commits
+.gcs_entries

README.md

@@ -0,0 +1,42 @@
+# V8 Build Tools
+
+This repository contains all the necessary tools and scripts to build Google's V8 for embedding.
+
+## Prerequisites
+
+1. **Clone this repository:**
+
+    ```sh
+    git clone https://github.com/citizenfx/v8-build.git
+    cd v8-build
+    ```
+
+2. **Python 3.8+ must be installed on your system.**
+
+3. **Drive Mapping:**
+
+    Ensure you do not have a drive mapped to the letter 'Y'. If you do, change the mapping drive target to another letter in the `prepare-depot.ps1` and `build.ps1` files.
+
+## Building V8
+
+1. **Prepare the depot:**
+
+    Run the following script to prepare the depot:
+
+    ```sh
+    .\build\prepare-depot.ps1
+    ```
+
+2. **Build V8:**
+
+    Run the build script:
+
+    ```sh
+    .\build\build.ps1
+    ```
+
+3. **Wait approximately 20 minutes** for the build process to complete.
+
+## Build Results
+
+The build results will be located in the `builds_results` folder.

UPDATE.md

@@ -0,0 +1,7 @@
+# In case if update needed
+## Things you need to know
+* There was bug in ICU script that generating ASM file with icudata for embedding. If it still generates ASM file with `icudata` variable that prefixed with `_` - bug still exists and clang compilation will fail. We are doing trick to remove underscore in build script
+* By default v8_monolith use static crt, so are forcing it to use dynamic CRT. Maybe with some time Google will fix it, so then you need to check flags with `gn args` and look for flag that forcing dynamic crt to be used.
+
+## How to update to newer V8
+Simply put new commit hash/tag/branch from [V8 repository](https://github.com/v8/v8) into `target.txt`. It will be added to `git checkout` command

build/build.ps1

@@ -13,18 +13,47 @@ Write-Host "Mount directory: $MOUNT_DIR"
 Invoke-Expression "subst ${MOUNT_TARGET_DRIVE}: /D" -ErrorAction SilentlyContinue
 Invoke-Expression "subst ${MOUNT_TARGET_DRIVE}: $MOUNT_DIR" -ErrorAction SilentlyContinue
 
-# Reading target commit hash
-$COMMIT = Get-Content "${MOUNT_TARGET_DRIVE}:\build\target_commit.txt " -Raw 
+# Reading target commit/tag/branch hash
+$REPOSITORY_TARGET_CHECKOUT = Get-Content "${MOUNT_TARGET_DRIVE}:\build\target.txt " -Raw 
 
 # Fetch v8 source
 & fetch v8
 New-Item -ItemType Directory -Force -Path "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.release"
-Copy-Item -Path "${MOUNT_TARGET_DRIVE}:\build\args_debug.gn" -Destination "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.release\"
+New-Item -ItemType Directory -Force -Path "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.debug"
+Copy-Item -Path "${MOUNT_TARGET_DRIVE}:\build\args_debug.gn" -Destination "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.debug\args.gn"
+Copy-Item -Path "${MOUNT_TARGET_DRIVE}:\build\args_release.gn" -Destination "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.release\args.gn"
 Set-Location "${MOUNT_TARGET_DRIVE}:\v8"
-git checkout $COMMIT
+git checkout $REPOSITORY_TARGET_CHECKOUT
 gclient sync
+
+####################################
+#                                  #
+#     Tricks and hacks zone        #
+#                                  #
+####################################
+
+# Trick to force v8 to use dynamic CRT
+(Get-Content "${MOUNT_TARGET_DRIVE}:\v8\build\config\BUILDCONFIG.gn").Replace('//build/config/win:default_crt', '//build/config/win:dynamic_crt') | Set-Content "${MOUNT_TARGET_DRIVE}:\v8\build\config\BUILDCONFIG.gn"
+
+# Fixing bug with compiling inlined icudata in ASM with Clang
+# This cheap trick breaks macos version compilation, but we don't care about that
+(Get-Content "${MOUNT_TARGET_DRIVE}:\v8\third_party\icu\scripts\make_data_assembly.py").Replace('_icudt%s_dat', 'icudt%s_dat') | Set-Content "${MOUNT_TARGET_DRIVE}:\v8\third_party\icu\scripts\make_data_assembly.py"
+
+####################################
+#                                  #
+#     Tricks and hacks zone end    #
+#                                  #
+####################################
+
+gn gen out.gn/x64.debug
+ninja -C out.gn/x64.debug -j16 v8_monolith
+
 gn gen out.gn/x64.release
-ninja -C out.gn/x64.release -j16 v8
+ninja -C out.gn/x64.release -j16 v8_monolith
+
+New-Item -ItemType Directory -Force -Path "${MOUNT_TARGET_DRIVE}:\build_results"
+Copy-Item -Path "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.debug\obj\v8_monolith.lib" -Destination "${MOUNT_TARGET_DRIVE}:\build_results\v8_monolithd.lib"
+Copy-Item -Path "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.release\obj\v8_monolith.lib" -Destination "${MOUNT_TARGET_DRIVE}:\build_results\v8_monolith.lib"
 
 # Attempt to clean up and remove X: mapping at the end; ignore errors
 Invoke-Expression "subst ${MOUNT_TARGET_DRIVE}: /D" -ErrorAction SilentlyContinue

build/build.ps1.bak

@@ -0,0 +1,35 @@
+# Define environment variables
+$env:DEPOT_TOOLS_WIN_TOOLCHAIN = "0"
+
+# Get the current directory of the script
+$CURRENT_DIR = Split-Path -Parent $MyInvocation.MyCommand.Path
+Write-Host "Current directory: $CURRENT_DIR"
+
+# Define the directory to be mounted
+$MOUNT_DIR = Split-Path -Path $CURRENT_DIR -Parent
+$MOUNT_TARGET_DRIVE = "Y"
+Write-Host "Mount directory: $MOUNT_DIR"
+
+Invoke-Expression "subst ${MOUNT_TARGET_DRIVE}: /D" -ErrorAction SilentlyContinue
+Invoke-Expression "subst ${MOUNT_TARGET_DRIVE}: $MOUNT_DIR" -ErrorAction SilentlyContinue
+
+# Reading target commit hash
+$COMMIT = Get-Content "${MOUNT_TARGET_DRIVE}:\build\target_commit.txt " -Raw 
+
+# Fetch v8 source
+& fetch v8
+New-Item -ItemType Directory -Force -Path "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.release"
+New-Item -ItemType Directory -Force -Path "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.debug"
+Copy-Item -Path "${MOUNT_TARGET_DRIVE}:\build\args_debug.gn" -Destination "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.debug\args.gn"
+Copy-Item -Path "${MOUNT_TARGET_DRIVE}:\build\args_release.gn" -Destination "${MOUNT_TARGET_DRIVE}:\v8\out.gn\x64.release\args.gn"
+Set-Location "${MOUNT_TARGET_DRIVE}:\v8"
+git checkout $COMMIT
+gclient sync
+gn gen out.gn/x64.debug
+ninja -C out.gn/x64.debug -j16 v8_monolith
+
+gn gen out.gn/x64.release
+ninja -C out.gn/x64.release -j16 v8_monolith
+
+# Attempt to clean up and remove X: mapping at the end; ignore errors
+Invoke-Expression "subst ${MOUNT_TARGET_DRIVE}: /D" -ErrorAction SilentlyContinue