mmarch

mmarch: CLI Tool Handling MM678 & HoMM3 Archive Files Cross-platform

Command line tool to handle (extract, replace, compare resources and more) Heroes of Might and Magic 3 and Might and Magic 6, 7, 8 resource archive files (e.g. lod files) for Windows, Linux and macOS.

Download mmarch v5.0.0 for Windows

Other platforms: Linux x64, arm64, ia32 | macOS x64, arm64 | or npm i -g mmarch with Node.js

Based on GrayFace's MMArchive (repo). If you need a graphical user interface tool, use MMArchive.

Summary & Table of Contents

mmarch extract <ARCHIVE_FILE> <FOLDER> [FILE_TO_EXTRACT_1] [FILE_TO_EXTRACT_2] [...]
mmarch list <ARCHIVE_FILE> [SEPARATOR]
mmarch add <ARCHIVE_FILE> <FILE_TO_ADD_1> [FILE_TO_ADD_2] [...]
mmarch delete <ARCHIVE_FILE> <FILE_TO_DELETE_1> [FILE_TO_DELETE_2] [...]
mmarch rename <ARCHIVE_FILE> <OLD_FILE_NAME> <NEW_FILE_NAME>
mmarch create <ARCHIVE_FILE> <ARCHIVE_FILE_TYPE> <FOLDER> [FILE_TO_ADD_1] [FILE_TO_ADD_2] [...]
mmarch merge <ARCHIVE_FILE> <ARCHIVE_FILE_2>
mmarch compare <ARCHIVE_FILE_OR_FOLDER> <ARCHIVE_FILE_OR_FOLDER_2>
mmarch compare <ARCHIVE_FILE_OR_FOLDER> <ARCHIVE_FILE_OR_FOLDER_2> {nsis|batch} <SCRIPT_FILE> <DIFF_FOLDER_NAME>
mmarch compare <ARCHIVE_FILE_OR_FOLDER> <ARCHIVE_FILE_OR_FOLDER_2> filesonly <DIFF_FOLDER>
mmarch diff-files-to-{nsis|batch} <OLD_DIFF_FOLDER> <SCRIPT_FILE> <DIFF_FOLDER_NAME>
mmarch diff-add-keep <DIFF_FOLDER>
mmarch checksum <ARCHIVE_FILE>
mmarch checksum <ARCHIVE_FILE> [FILE_1] [FILE_2] [...]
mmarch checksum <ARCHIVE_FILE> --v[all] <CRC32_FILE>
mmarch checksum <ARCHIVE_FILE> --v[all] <name1:HASH1> [name2:HASH2] [...]
mmarch optimize <ARCHIVE_FILE>
mmarch help

<>: required; []: optional; {a|b|c}: required, choose one of them

For the first argument, use k for compare, s for checksum, df2n for diff-files-to-nsis, df2b for diff-files-to-batch, dak for diff-add-keep, otherwise, use the initial letter as a shortcut.

• Usage Notes: | FOLDER | FILE_TO_XXXX_? | Batch archive extraction | Palette arguments | --ec exit code mode | Other notes
• For developer: | Work with batch, NSIS scripts (to produce game patch or MOD installation files) | Development | Change Log

Real-world example and tutorial: How to make a .exe MMMerge Update Patch

extract

mmarch extract <ARCHIVE_FILE> <FOLDER> [FILE_TO_EXTRACT_1] [FILE_TO_EXTRACT_2] [...]

Extract (i.e. unpack) file(s) from the archive file (i.e. resource package file, typically .lod files).

Read "§ Batch archive extraction" section to learn how to use wildcard for <ARCHIVE_FILE> in mmarch extract command to extract all archives in specified folder(s) with just one command.

If no [FILE_TO_EXTRACT_?] is specified, it will extract all files in the archive file.

Read "§ Notes on FILE_TO_XXXX_?" section for more important notes about [FILE_TO_EXTRACT_?].

<FOLDER> is the path of the folder where the extracted file(s) will be placed.

Read "§ Notes on FOLDER" section for more important notes about <FOLDER>.

Examples:

mmarch extract events.lod .
mmarch extract events.lod myfolder
mmarch extract events.lod "my folder/my subfolder"
mmarch extract events.lod myfolder items.txt OUT04.EVT

Batch archive extraction examples see: "§ Batch archive extraction" section.

list

mmarch list <ARCHIVE_FILE> [SEPARATOR]

List all file names in the archive file.

[SEPARATOR] is a string that separates the file names, use double quotes ("") to enclose the separator. By default (when [SEPARATOR] is not specified), windows newline (CRLF) will be used as the separator, which means it will output one file name per line.

Examples:

mmarch list events.lod
mmarch list events.lod "|"

add

mmarch add <ARCHIVE_FILE> <FILE_TO_ADD_1> [FILE_TO_ADD_2] [...]

Add file(s) into the archive file.

If a file with the same name (case-insensitive) exists in the archive file, it will be replaced.

Read "§ Notes on FILE_TO_XXXX_?" section for more important notes about FILE_TO_ADD_?.

If you need to force using a palette for a .bmp file in a mmspriteslod or mmbitmapslod archive, read "§ Add file with palette" section for details.

Example:

mmarch add events.lod items.txt OUT04.EVT new.txt

delete

mmarch delete <ARCHIVE_FILE> <FILE_TO_DELETE_1> [FILE_TO_DELETE_2] [...]

Delete file(s) from the archive file.

Read "§ Notes on FILE_TO_XXXX_?" section for more important notes about FILE_TO_DELETE_?.

Example:

mmarch delete events.lod items.txt OUT04.EVT

rename

mmarch rename <ARCHIVE_FILE> <OLD_FILE_NAME> <NEW_FILE_NAME>

Rename a file in the archive file.

Example:

mmarch rename events.lod items.txt items_new.txt

create

mmarch create <ARCHIVE_FILE> <ARCHIVE_FILE_TYPE> <FOLDER> [FILE_TO_ADD_1] [FILE_TO_ADD_2] [...]

Create a new archive file from scratch. It will be empty if no [FILE_TO_ADD_?] is specified.

Read "§ Notes on FILE_TO_XXXX_?" section for more important notes about [FILE_TO_ADD_?].

<FOLDER> is the path of the folder where the new archive file will be placed.

Read "§ Notes on FOLDER" section for more important notes about <FOLDER>.

ARCHIVE_FILE_TYPE can be one of the following:

• h3lod: Heroes 3 LOD archive (*.lod; *.pac)
• h3snd: Heroes 3 sound archive (*.snd)
• mmsnd: MM sound archive (*.snd)
• h3mm78vid: Heroes 3 or MM 7-8 video archive (*.vid)
• mm6vid: MM 6 video archive (*.vid)
• mmbitmapslod: MM bitmaps archive ([*.]bitmaps.lod; *.lod; *.lwd)
• mmiconslod: MM icons archive ([*.]icons.lod; *.lod)
• mmspriteslod: MM sprites archive ([*.]sprites.lod; *.lod)
• mm8loclod: MM 8 localization archive (*.T.lod; *.lod)
• mm78gameslod: MM 7-8 games archive ([*.]games.lod; *.lod)
• mm6gameslod: MM 6 games archive ([*.]games.lod; *.lod)
• mm78save: MM 7-8 saved game archive (*.lod; *.mm7; *.dod)
• mm6save: MM 6 saved game archive (*.mm6; *.lod)

Use correct file extension for your <ARCHIVE_FILE>, wrong extension will cause wrong file format even if <ARCHIVE_FILE_TYPE> is correct.

If you need to force using a palette for a .bmp file in a mmspriteslod or mmbitmapslod archive, read "§ Add file with palette" section for details.

Example:

mmarch create events_new.lod mmiconslod . items.txt OUT04.EVT new.txt

merge

mmarch merge <ARCHIVE_FILE> <ARCHIVE_FILE_2>

Merge two archive files.

The first archive will change and the second will not. Resource files in the second archive, will be added into the first archive if they do not exist in the first archive, and will replace those in the first archive if files with same names exist in the first archive.

Example:

mmarch merge events.lod events2.lod

compare

Compare two archive files, or two folders containing archive files and/or files of any other type.

mmarch compare and all related commands and features (incl. NSIS/batch script generation) work totally even if your folders do not contain any MM archive files at all. Therefore, you can use mmarch as a general file comparison and diff generation tool.

(k is short for compare)

The fourth parameter, [OPTION], can be:

not specified

mmarch compare <ARCHIVE_FILE_OR_FOLDER> <ARCHIVE_FILE_OR_FOLDER_2>

Print a comparison report. Legend:

Example:

mmarch compare events.lod new.events.lod
mmarch compare game_folder_old game_folder_new

nsis

mmarch compare <ARCHIVE_FILE_OR_FOLDER> <ARCHIVE_FILE_OR_FOLDER_2> nsis <SCRIPT_FILE> <DIFF_FOLDER_NAME>

Generate a .nsi script file SCRIPT_FILE which can be compiled to a .exe patch installation file using NSIS. Diff files (same as with filesonly option) will be copied to a subfolder of SCRIPT_FILE's folder, and the subfolder will be named with DIFF_FOLDER_NAME (it's a name, not a path). Read § NSIS-compiled patch installer for the following steps.

Example:

mmarch compare game_folder_old game_folder_new nsis nsis_folder/script.nsi files

batch

mmarch compare <ARCHIVE_FILE_OR_FOLDER> <ARCHIVE_FILE_OR_FOLDER_2> batch <SCRIPT_FILE> <DIFF_FOLDER_NAME>

Generate a .bat (Window Batch) file SCRIPT_FILE which can work along with your DIFF_FOLDER and mmarch.exe. Diff files (same as with filesonly option) will be copied to a subfolder of SCRIPT_FILE's folder, and the subfolder will be named with DIFF_FOLDER_NAME (it's a name, not a path). Read § Batch patch installer for the following steps.

filesonly

mmarch compare <ARCHIVE_FILE_OR_FOLDER> <ARCHIVE_FILE_OR_FOLDER_2> filesonly <DIFF_FOLDER>

Copy all diff files (i.e. non-resource file and extract in-archive resource files that are different, including added, modified or deleted. read § Details if needed) in the two ARCHIVE_FILE_OR_FOLDERs, to DIFF_FOLDER.

Note that if DIFF_FOLDER exsits, it will perform a merger of old diff files and new diff files by cleaning up old diff files. Therefore, you can do: mmarch compare VERSION_1 VERSION_2 filesonly diff_folder and then mmarch compare VERSION_2 VERSION_3 filesonly diff_folder. It's OK to do VER1 -> VER2 then VER2 -> VER3, or VER1 -> VER3 then VER2 -> VER3. But VER1 -> VER2 then VER1 -> VER3 will cause problem (image demo). This merger (cleanup) is only performed in filesonly command, and not in nsis or batch.

diff-*

There are also 3 special arguments related to compare, all predeced by diff-*:

diff-files-to-nsis/-batch

mmarch diff-files-to-nsis <OLD_DIFF_FOLDER> <SCRIPT_FILE> <DIFF_FOLDER_NAME>
OR
mmarch diff-files-to-batch <OLD_DIFF_FOLDER> <SCRIPT_FILE> <DIFF_FOLDER_NAME>

(df2n is short for diff-files-to-nsis; df2b is short for diff-files-to-batch)

The former command generates a .nsi script file, while the later command generates a .bat (Window Batch) file SCRIPT_FILE, according to the files in [OLD_DIFF_FOLDER] that you get using filesonly option of mmarch compare. [OLD_DIFF_FOLDER] will then be moved to SCRIPT_FILE's folder (becoming its subfolder) and renamed with DIFF_FOLDER_NAME.

Examples:

If diff_folder_temp/ is empty, the aforementioned

mmarch compare game_folder_old game_folder_new nsis nsis_folder/script.nsi files

has the same effect as the two following commands combined

mmarch compare game_folder_old game_folder_new filesonly diff_folder_temp
mmarch diff-files-to-nsis diff_folder_temp nsis_folder/script.nsi files

diff-add-keep

mmarch diff-add-keep <DIFF_FOLDER>

(dak is short for diff-add-keep)

This is for developers using Git. It will add an empty file .mmarchkeep to every empty folder in DIFF_FOLDER, so that Git can keep the empty folders tracked. diff-files-to-nsis/-batch ignore .mmarchkeep files.

checksum

Generate or verify CRC32 checksums for archive files and their resources.

(s is short for checksum)

Generate CRC32

mmarch checksum <ARCHIVE_FILE>

Generate CRC32 hash of the archive file (or any file) itself.

mmarch checksum <ARCHIVE_FILE> [FILE_1] [FILE_2] [...]

Generate CRC32 of resource files inside the archive. Use * or *.* for all resources, *.EXT for extension filter. Read "§ Notes on FILE_TO_XXXX_?" for wildcard details.

Output format:

A1B2C3D4  items.txt
E5F6A7B8  OUT04.EVT

(Uppercase hex CRC32, two spaces, filename. CRLF line endings)

Examples:

mmarch checksum events.lod
mmarch checksum events.lod *
mmarch checksum events.lod items.txt OUT04.EVT
mmarch checksum events.lod *.txt
mmarch checksum events.lod * > events.lod.crc32

Verify CRC32

mmarch checksum <ARCHIVE_FILE> --v <CRC32_FILE>

Verify CRC32 of resource files listed in CRC32_FILE. Only the files listed in the checksum file are verified.

mmarch checksum <ARCHIVE_FILE> --vall <CRC32_FILE>

Verify CRC32 of ALL resource files. Not only must every file listed in CRC32_FILE match, but the listed files must also be ALL the files in the archive (no unlisted files allowed).

mmarch checksum <ARCHIVE_FILE> --v <name1:HASH1> [name2:HASH2] [...]
mmarch checksum <ARCHIVE_FILE> --vall <name1:HASH1> [name2:HASH2] [...]

Inline verify mode (if the first argument after --v or --vall contains :). Instead of reading checksums from a file, specify them directly as filename:CRC32HASH pairs.

Verify output:

items.txt: OK
OUT04.EVT: FAILED
WARNING: 1 computed checksums did NOT match

The exit code is non-zero if any verification fails.

Examples:

mmarch checksum events.lod --v events.lod.crc32
mmarch checksum events.lod --vall wholefile.crc32
mmarch checksum events.lod --v items.txt:A1B2C3D4 OUT04.EVT:E5F6A7B8
mmarch checksum events.lod --vall items.txt:A1B2C3D4 OUT04.EVT:E5F6A7B8

optimize

mmarch optimize <ARCHIVE_FILE>

Optimize an archive file.

Note that when mmarch outputs an archive file (with mmarch {add|delete|rename|create|merge} commands), it has already been optimized and you don't need to do it again.

Example:

mmarch optimize events.lod

help

mmarch help

Display help information.

Notes on FOLDER

The "Notes on FOLDER" applys to the argument representing a folder path in mmarch extract and mmarch create.

• Folder path cannot be empty when it is required
• If folder path contains space ( ), use double quotes ("") to enclose the folder path
• Path without a leading slash, or with a leading ./: relative path
  • .: current directory
  • ..: parent directory of the current directory (use with CAUTION!, not expected to work for compare)
• A leading slash /: absolute path (the root being C:\ or D:\ or ...) (use with CAUTION!)
• A trailing slash is optional. Same effect with or without it.
• Slash (/) and backslash (\) have the same effect.

Notes on FILE_TO_XXXX_?

The "Notes on FILE_TO_XXXX_?" applys to the argument representing a file path in mmarch extract, mmarch add, mmarch delete and mmarch create.

• * or *.*: all the files
• *.EXT (e.g. *.txt): all the files with the specified extension
• *.: all the files without extension
• You can add directory path before the aforementioned wildcard character. Similar rules for folder path apply to the file path (incl. the double quotes, relative and absolute path, slash usage)

Batch archive extraction

You can use wildcard for <ARCHIVE_FILE> in mmarch extract command to extract all archives in specified folder(s) with just one command.

• File path in <ARCHIVE_FILE>:
  • **: zero or more directories (i.e. the current directory and all its non-hidden subdirectories, recursively)
  • *: any ONE directory
  • Read the section "§ Notes on FOLDER" above for relative path and absolute path (absolute path is NOT recommended at all!)
• File name at the end of <ARCHIVE_FILE>:
  • * or *.*: all the supported archive files (.lod, .pac, .snd, .vid, .lwd, .mm7, .dod & .mm6)
  • *.EXT (e.g. *.lod): all the supported archive files with the specified extension (a.bitmaps.lod's extension is .lod, not .bitmaps.lod)
  • "*.EXT1|EXT2|EXT3..." (e.g. "*.lod|lwd|vid"): all the supported archive files with any of the specified extensions, note that it has to be enclosed by double quotes

You might need to wait a few minutes if you are trying to extract all the archive files from a whole game.

Examples:

mmarch extract **/* resource_folder

The command above can extract all the resource files in all the supported archive files in current directory and its subdirectories. The resources will be placed in an auto-named (e.g. icons.lod.mmarchive for icons.lod) subdirectory (or sub-subdirectory depending on whether the archive is in a subdirectory) in resource_folder/.

mmarch extract data/*.lod . *.txt

The command above can extract all .txt resource files in all .lod archive files in data/ directory. The resources will be placed in an auto-named subdirectory in current directory (current directory = .).

mmarch extract "*/*.lod|lwd" ../resource_folder

The command above can extract all the resource files in all .lod and .lwd archive files in any first level subdirectories of the current directory. The resources will be placed in an auto-named subdirectory in resource_folder/ that belongs to the parent directory of the current directory.

Add file with palette

mmarch add <ARCHIVE_FILE> <FILE_TO_ADD_1> [/p PALETTE_INDEX_1] [FILE_TO_ADD_2] [/p PALETTE_INDEX_2] [...]

mmarch create <ARCHIVE_FILE> <ARCHIVE_FILE_TYPE> <FOLDER> [FILE_TO_ADD_1] [/p PALETTE_INDEX_1] [FILE_TO_ADD_2] [/p PALETTE_INDEX_2] [...]

If you are adding a .bmp file into a MM sprites archive (mmspriteslod) or MM bitmaps archive (mmbitmapslod) file, then you can optionally add /p PALETTE_INDEX right after the .bmp file in your command, in order to specify a palette stored in any [*.]bitmaps.lod archive file (including your target archive file itself if it is a [*.]bitmaps.lod) in the same directory. A palette can be extracted as a pal<three_digit_palette_index>.act file (e.g. pal023.act).

If there is no /p PALETTE_INDEX after the .bmp file in your command, then the program will try to, from every [*.]bitmaps.lod archive file, automatically find a palette that matches your .bmp file's color table (palette). If you do specify a palette index, the program will not check if your palette exists in the [*.]bitmaps.lod.

Do not pad 0 to palette index. pal023.act's palette index is 23.

Examples:

mmarch add sprites.lod mymonster01.bmp /p 23 mymonster02.bmp /p 558
mmarch create myfiles.sprites.lod mmspriteslod . mymonster01.bmp /p 23 mymonster02.bmp /p 558

Other tips and notes

Less important tips and notes include:

Use initial letter for the first argument

For the first argument, the initial letter of extract, list, add, delete, rename, create, merge, optimize, help can be used instead (e.g. mmarch e events.lod myfolder); use k for compare, s for checksum, df2n for diff-files-to-nsis, df2b for diff-files-to-batch, dak for diff-add-keep; they can be optionally preceded by a leading - or -- which will do the same job.

Paths are case-insensitive

File names and paths are case-insensitive.

Backup please

The tool changes or overrides original archive or unpacked resource files permanently, you should consider copying them to other directory or with other names to make backups (e.g. copy a.lod a.backup.lod).

File will be skipped if it fails

If the program encounters an error when extracting, adding or deleting a resource file from archive file(s), this resource file will be skipped and the rest will still be processed.

Exit code mode (--ec)

You can control exit code behavior with the --ec flag, placed anywhere in the command:

mmarch --ec {strict|normal|loose} <COMMAND> [ARGS...]

Scenario	strict	normal (default)	loose
Unknown command	1	1	0
Missing parameters	1	1	0
Rename: file not found	1	1	0
Open non-existent archive	1	1	0
Delete: per-item not found	1	0	0
Extract: per-item not found	1	0	0
Checksum verify failure	1	1	1

• strict: all errors cause a non-zero exit code
• normal (default): per-item not-found in delete/extract is non-fatal (only prints a warning), other errors cause non-zero exit code
• loose: only checksum verification failure causes a non-zero exit code

Examples:

mmarch --ec strict delete events.lod nonexistent.txt
mmarch --ec loose rename events.lod old.txt new.txt

Note: Windows versions up to and including 4.0.0 always use the loose setting. Starting with later versions, the default is normal.

In-archive and extracted extension difference

For some archive format, some files have different file extensions in the archive and as extracted files out of the archive. Don't wrong, you can use either extension to refer to the file. Below is the list (same extension is used if not listed):

Archive Format	In-Archive Ext	Extracted Ext
h3lod	pcx	bmp
h3snd	No Extension	wav
mmsnd	No Extension	wav
mm6vid	No Extension	smk
mmbitmapslod	No Extension	bmp
mmbitmapslod	No Extension	act
mmiconslod	No Extension	bmp
mmiconslod	No Extension	act
mmspriteslod	No Extension	bmp
mm8loclod	No Extension	bmp

Sprites with incorrect palette

Official Might and Magic VI and VII has some sprites with incorrect palette:

• MM6's bat (yes, the monster that allegedly caused the coronavirus pandemic) images, stored in data/SPRITES.LOD as BAT**** files, have incorrect palette: their palette should be 156 instead of 422 (pal422 exists in BITMAPS.LOD but is unrelated). However, it seems neither 422 nor 156 is correct for some of the bat bitmaps, both mmarch and MMArchive can't retrieve their correct palette.
• MM7's "swptree" images, stored in data/SPRITES.LOD as swptree* files, have incorrect palette: their palette should be 120 instead of 940 (pal940 doesn't exist in BITMAPS.LOD at all).

mmarch will not fix their problem and will skip these sprite bitmaps (though GrayFace's MMArchive can fix them). However, you may find these sprites bitmap files well extracted with correct palette in fixedsprites.zip in the repo.

Details of DIFF_FOLDER of compare

• DIFF_FOLDER of mmarch compare <ARCHIVE_FILE_OR_FOLDER> <ARCHIVE_FILE_OR_FOLDER_2> {filesonly|nsis|batch}:
  • if a file is not present in old ARCHIVE_FILE_OR_FOLDER and is added in the new ARCHIVE_FILE_OR_FOLDER, then it will be copied to DIFF_FOLDER
  • if a file is present in old ARCHIVE_FILE_OR_FOLDER and is deleted in the new ARCHIVE_FILE_OR_FOLDER, then an empty file named FILENAME.todelete will be put into DIFF_FOLDER
  • if a non-MM Archive file is present in old ARCHIVE_FILE_OR_FOLDER and is modified in the new ARCHIVE_FILE_OR_FOLDER, then it will be copied to DIFF_FOLDER
  • if an MM Archive file is present in old ARCHIVE_FILE_OR_FOLDER and is modified in the new ARCHIVE_FILE_OR_FOLDER, then a folder named FILENAME.mmarchive will be created and:
    • if a resource file is not present in old ARCHIVE_FILE and is added in the new ARCHIVE_FILE, then it will be copied into FILENAME.mmarchive folder
    • if a resource file is present in old ARCHIVE_FILE and is deleted in the new ARCHIVE_FILE, then an empty file named FILENAME.todelete will be put into FILENAME.mmarchive folder
    • if a resource file is present in old ARCHIVE_FILE and is modified in the new ARCHIVE_FILE, then it will be copied to FILENAME.mmarchive folder

Work with batch, NSIS and other scripts

mmarch can be used with batch file (.bat) or NSIS script to produce game patch or MOD installation files. Also, with Python, JavaScript, batch files, PowerShell script, etc., mmarch can automatize the workflow of the development of Heroes of Might and Magic 3 and Might and Magic 6, 7, 8 MODs and patches.

In case you need it, Smacker (.smk) and Bink (.bik) video file formats' original developer's official The RAD Video Tools can be used to extract and replace sound from .bik and .smk videos. This is essential for game video localization.

No matter you have a Might and Magic project (with MM archive files) or non MM projects (without MM archive files), you can read the following sections and learn how to use mmarch to easily compare old and new folders, in order to make a patch.

NSIS-compiled patch installer

mmarch compare <ARCHIVE_FILE_OR_FOLDER> <ARCHIVE_FILE_OR_FOLDER_2> nsis <SCRIPT_FILE> <DIFF_FOLDER_NAME> will compare the two folders, copy all different files (including in-archive resource files) to DIFF_FOLDER_NAME (which is a subfolder of SCRIPT_FILE's folder) and generate a .nsi script file SCRIPT_FILE. You may then:

• Modify the .nsi file if needed
• Put mmarch.exe in the folder of the .nsi file
• Compile the .nsi file to a .exe patch setup file with the latest NSIS 3

Batch patch installer

mmarch compare <ARCHIVE_FILE_OR_FOLDER> <ARCHIVE_FILE_OR_FOLDER_2> batch <SCRIPT_FILE> <DIFF_FOLDER_NAME> will compare the two folders, copy all different files (including in-archive resource files) to DIFF_FOLDER_NAME (which is a subfolder of SCRIPT_FILE's folder) and generate a .bat (Window Batch) file SCRIPT_FILE. You may then:

• Modify the .bat file if needed
• Put mmarch.exe in the folder of the .bat file
• Compress them into a .zip
• Distribute the .zip to users

A user may:

• Unzip it
• Put everything in the game folder
• Double click .bat file to patch the game

The batch file will not perform a self-deletion, users have to delete .bat, mmarch.exe and DIFF_FOLDER manually.

Development

Windows (Delphi)

Original Delphi version is available in the mmarch-delphi/ directory. It is used to build Windows versions.

• git clone or download mmarch's source
• git clone or download GrayFace/Misc
• Copy or move RSPak/ folder from GrayFace/Misc project into mmarch's mmarch-delphi/ folder. Do not overwrite the patched RSPak/Extra/RSLod.pas already in the repo, it contains a bug fix for file data corruption when adding multiple files to an archive.
• Open "mmarch.bdsproj" file with Borland Developer Studio 2006 or Delphi 10 (it may or may not work with newer version Borland, see GrayFace's note)
• Compile

Linux / macOS (Rust)

A cross-platform Rust port is available in the mmarch-rust/ directory. It has the same CLI interface and behavior as the Delphi version (outputs use CRLF line ending as well). It is used to build Linux and macOS versions. See § Known differences between Rust and Delphi versions for minor gaps.

cd mmarch-rust
cargo build --release

The binary will be at mmarch-rust/target/release/mmarch (or mmarch.exe on Windows).

Known differences between Rust and Delphi versions

The Rust port covers the same CLI interface as the Delphi version, but there are a few gaps:

• BMP palette handling (/p and auto-palette): The Delphi version converts .bmp files to the internal LOD bitmap format with palette lookup when adding to mmbitmapslod or mmspriteslod archives. The Rust version stores .bmp files as generic data (BmpSize=0). The /p PALETTE_INDEX flag is accepted and validated but the palette index is not actually used for bitmap conversion. Auto-palette detection for .bmp files is also not implemented. Additionally, the Delphi version rejects non-BMP files in mmspriteslod archives, while the Rust version allows adding any file type.
• Non-ASCII case-insensitive comparison: The Delphi version uses Windows locale-aware SameText for case-insensitive name matching (handles accented characters etc.). The Rust version uses ASCII-only case folding (eq_ignore_ascii_case). This only matters for archive entries with non-ASCII names, which are rare in game archives.
• File enumeration order: The Rust version sorts file listings alphabetically when enumerating directories, while the Delphi version uses the raw FindFirst/FindNext order (typically alphabetical on NTFS). This may cause add *.ext or batch wildcard operations to produce entries in a slightly different order. Functionality is not affected.
• Unicode filesystem paths: The Rust version fully supports Unicode paths. The Delphi version uses ANSI Win32 APIs and cannot handle non-ANSI characters in file or directory paths.

Running tests

The Rust integration tests run against both the Rust binary and (on Windows, if present) the Delphi binary. Test data is included in mmarch-rust/tests/.

cd mmarch-rust
cargo +stable-x86_64-pc-windows-gnu test --test integration --release

(Remove +stable-x86_64-pc-windows-gnu on non-Windows)

GitHub CI

The workflow triggers on:

• Push to master branch (Test)
• Pull requests targeting master (Test)
• Tags matching v* (Test-Build-Release)

Change Log

• [2020-03-11] v1.0: initial release
• [2020-03-18] v2.0: support palette; support *.EXT and batch archive extraction; deal with in-archive & extracted file extension differences and the "cannot find the path specified" problem caused by it
• [2020-03-31] v3.0: add compare method that can compare two dir and generate NSIS/Batch installer; tutorial
• [2020-04-02] v3.1: diff-files-to-* instead of compare-files-to-*; diff-add-keep; fix problem moving to subfolder
• [2020-04-22] v3.2: minor fix: diff-files-to-* do not work when old and new diff folders are the same
• [2026-03-16] v4.0.0: fix batch archive optimization when adding or deleting multiple files; fix missing begin/end block in add procedure for non-BMP files; add checksum command for CRC32 generation and verification; Rust port for Linux and macOS; npm release
• [2026-03-17] v5.0.0: more Rust version fixes and comprehensive tests; replace ambiguous /v[all] with --v[all] flag; improve exit code handling instead of returning 0 in nearly all cases; fix some minor bugs of Delphi version

License

MIT