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Merge bitcoin-core/secp256k1#1380: Add ABI checking tool for release …
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74a4d97 doc: Add ABI checking with `check-abi.sh` to the Release Process (Hennadii Stepanov)
e7f830e Add `tools/check-abi.sh` (Hennadii Stepanov)

Pull request description:

ACKs for top commit:
  real-or-random:
    ACK 74a4d97 it compares the right commits now
  jonasnick:
    re-Concept ACK 74a4d97

Tree-SHA512: bcca5246837f899d43ced3b0099a8e123f4fd2db7d15684bda22657649521db0c87f76696bfbd93b4dfdec6c4851e99c26c7e37cc5a1a78e9b1a296850a067fe
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jonasnick committed Dec 20, 2023
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5 changes: 5 additions & 0 deletions doc/release-process.md
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Expand Up @@ -34,6 +34,11 @@ build=$(mktemp -d)
cmake -B $build -DCMAKE_INSTALL_PREFIX=$dir && cmake --build $build --target install && ls -RlAh $dir
gcc -o ecdsa examples/ecdsa.c -I $dir/include -L $dir/lib*/ -l secp256k1 -Wl,-rpath,"$dir/lib",-rpath,"$dir/lib64" && ./ecdsa
```
4. Use the [`check-abi.sh`](/tools/check-abi.sh) tool to ensure there are no unexpected ABI incompatibilities and that the version number and release notes accurately reflect all potential ABI changes. To run this tool, the `abi-dumper` and `abi-compliance-checker` packages are required.

```shell
tools/check-abi.sh
```

## Regular release

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64 changes: 64 additions & 0 deletions tools/check-abi.sh
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#!/bin/sh

set -eu

default_base_version="$(git describe --match "v*.*.*" --abbrev=0)"
default_new_version="master"

display_help_and_exit() {
echo "Usage: $0 <base_ver> <new_ver>"
echo ""
echo "Description: This script uses the ABI Compliance Checker tool to determine if the ABI"
echo " of a new version of libsecp256k1 has changed in a backward-incompatible way."
echo ""
echo "Options:"
echo " base_ver Specify the base version (default: $default_base_version)"
echo " new_ver Specify the new version (default: $default_new_version)"
echo " -h, --help Display this help message"
exit 0
}

if [ "$#" -eq 0 ]; then
base_version="$default_base_version"
new_version="$default_new_version"
elif [ "$#" -eq 1 ] && { [ "$1" = "-h" ] || [ "$1" = "--help" ]; }; then
display_help_and_exit
elif [ "$#" -eq 2 ]; then
base_version="$1"
new_version="$2"
else
echo "Invalid usage. See help:"
echo ""
display_help_and_exit
fi

checkout_and_build() {
git worktree add -d "$1" "$2"
cd "$1"
mkdir build && cd build
cmake -S .. --preset dev-mode \
-DCMAKE_C_COMPILER=gcc -DCMAKE_BUILD_TYPE=None -DCMAKE_C_FLAGS="-g -Og -gdwarf-4" \
-DSECP256K1_BUILD_BENCHMARK=OFF \
-DSECP256K1_BUILD_TESTS=OFF \
-DSECP256K1_BUILD_EXHAUSTIVE_TESTS=OFF \
-DSECP256K1_BUILD_CTIME_TESTS=OFF \
-DSECP256K1_BUILD_EXAMPLES=OFF
cmake --build . -j "$(nproc)"
abi-dumper src/libsecp256k1.so -o ABI.dump -lver "$2"
}

echo "Comparing $base_version (base version) to $new_version (new version)"
echo

original_dir="$(pwd)"

base_source_dir=$(mktemp -d)
checkout_and_build "$base_source_dir" "$base_version"

new_source_dir=$(mktemp -d)
checkout_and_build "$new_source_dir" "$new_version"

cd "$original_dir"
abi-compliance-checker -lib libsecp256k1 -old "${base_source_dir}/build/ABI.dump" -new "${new_source_dir}/build/ABI.dump"
git worktree remove "$base_source_dir"
git worktree remove "$new_source_dir"

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