Discussion: Additional sources of truth for wrapper generation

[rhx]

Discussion: Additional sources of truth for wrapper generation

[mikolasstuchlik]

This issue was discussed on Discord with @kabiroberai .

First message: https://discord.com/channels/791751777598570606/791751778092711941/872087233811853312
Last message: https://discord.com/channels/791751777598570606/791751778092711941/872404886833229824

Summary

Kabir suggested using SourceKit via https://github.com/jpsim/SourceKitten. SourceKitten is a commonly used tool. Kabir managed to create an example on using SwiftGLib:

# macOS
$ sourcekitten module-info --module CGLib -- -I"${PWD}/Sources" $(printf " -Xcc %s" $(pkg-config --cflags gio-unix-2.0)) -sdk "$(xcrun --show-sdk-platform-path)/Developer/SDKs/MacOSX$(xcrun --show-sdk-version).sdk"

# linux
$ sourcekitten module-info --module CGLib -- -I"${PWD}/Sources" $(printf " -Xcc %s" $(pkg-config --cflags gio-unix-2.0))

The output is ~800K lines long JSON, which contains embedded XML strings. It will take some time until I get familiar with the data structure.

The SourceKitten does not require the package to be built, but it needs path to the libsourcekitdInProc.so on Linux and the SDK on macOS.

[mikolasstuchlik]

#Linux
sourcekitten module-info --module Swift -- ""
sourcekitten module-info --module Foundation -- ""
sourcekitten module-info --module Glibc -- ""
sourcekitten module-info --module CGLib -- -I"$PWD"/Sources $(printf " -Xcc %s" $(pkg-config --cflags gio-unix-2.0))

#macOS
sourcekitten module-info --module Swift -- -sdk "$(xcrun --show-sdk-platform-path)/Developer/SDKs/MacOSX$(xcrun --show-sdk-version).sdk"
sourcekitten module-info --module Foundation -- -sdk "$(xcrun --show-sdk-platform-path)/Developer/SDKs/MacOSX$(xcrun --show-sdk-version).sdk"
sourcekitten module-info --module Darwin -- -sdk "$(xcrun --show-sdk-platform-path)/Developer/SDKs/MacOSX$(xcrun --show-sdk-version).sdk"
sourcekitten module-info --module CGLib -- -I"${PWD}/Sources" $(printf " -Xcc %s" $(pkg-config --cflags gio-unix-2.0)) -sdk "$(xcrun --show-sdk-platform-path)/Developer/SDKs/MacOSX$(xcrun --show-sdk-version).sdk"

[mikolasstuchlik]

For anyone interested, a MR mikolasstuchlik/g2swift#1 has been merged into my PoC repository g2swift. It implements a call to SourceKit and parses it's output.

This demonstrates how responses from SourceKit could be parsed. In future, I'll try to get a useful information about the environment.