compiledb-plus

Compilation Database Generator

Tool for generating Clang's JSON Compilation Database file for GNU make-based build systems.

It's aimed mainly at non-cmake (cmake already generates compilation database) large codebases. Inspired by projects like YCM-Generator and Bear, but faster (mainly with large projects), since in most cases it doesn't need a clean build (as the mentioned tools do) to generate the compilation database file, to achieve this it uses the make options such as -n/--dry-run and -k/--keep-going to extract the compile commands. Also, it's more cross-compiling friendly than YCM-generator's fake-toolchanin approach.

Note

This project is a fork of compiledb maintained by Nick Yamane. Since the PRs to the origin were pending and inactive for quite a long time, here is an attempt to patch the origin project with this new package name called compiledb-plus.

We express our gratitude to the original author(s) for their valuable contribution which made this fork possible. Any issues, questions, or contributions pertaining to the additions in this fork should be directed to this repository, not to the original author(s).

Changes from Original

• Support non-recursive make

Installation

# pip install compiledb-plus

• Supports Python 2.x and 3.x (for now, tested only with 2.7 and 3.6 versions)

Usage

compiledb-plus provides a make python wrapper script which, besides to execute the make build command, updates the JSON compilation database file corresponding to that build, resulting in a command-line interface similar to Bear.

To generate compile_commands.json file using compiledb-plus's "make wrapper" script, executing Makefile target all:

$ compiledb-plus make

compiledb-plus forwards all the options/arguments passed after make subcommand to GNU Make, so one can, for example, generate compile_commands.json using core/main.mk as main makefile (-f flag), starting the build from build directory (-C flag):

$ compiledb-plus make -f core/main.mk -C build

By default, compiledb-plus make generates the compilation database and runs the actual build command requested (acting as a make wrapper), the build step can be skipped using the -n or --no-build options.

$ compiledb-plus -n make

compiledb-plus base command has been designed so that it can be used to parse compile commands from arbitrary text files (or stdin), assuming it has a build log (ideally generated using make -Bnwk command), and generates the corresponding JSON Compilation database.

For example, to generate the compilation database from build-log.txt file, use the following command.

$ compiledb-plus --parse build-log.txt

or its equivalent:

$ compiledb-plus < build-log.txt

Or even, to pipe make's output and print the compilation database to the standard output:

$ make -Bnwk | compiledb-plus -o-

By default compiledb-plus generates a JSON compilation database in the "arguments" list format. The "command" string format is also supported through the use of the --command-style flag:

$ compiledb-plus --command-style make

Testing / Contributing

I've implemented this tool because I needed to index some AOSP's modules for navigating and studying purposes (after having no satisfatory results with current tools available by the time such as YCM-Generator and Bear). So I've reworked YCM-Generator, which resulted in the initial version of compiledb/parser.py and used successfully to generate compile_commands.json for some AOSP modules in ~1min running in a Docker container and then could use it with some great tools, such as:

• Vim + YouCompleteMe + rtags + chromatica.nvim
• Neovim + LanguageClient-neovim + cquery + deoplete
• Neovim + ALE + ccls

Notice:

• Windows: tested on Windows 10 with cmd, wsl(Ubuntu), mingw32
• Linux: tested only on Arch Linux and Ubuntu 18 so far
• Mac: tested on macOS 10.13 and 10.14

Patches are always welcome :)

License

GNU GPLv3