rewrite ./vendor-libsecp.sh
This rewrite:
* Fixes some shellcheck issues (bad quoting, use of | instead of ||
near the beginning of the file)
* Automatically computes the version prefix, depend directory, etc.,
and provides instructions to override this with env vars if the
user really wants to do this.
* Detects when it would be destructive and refuses to run unless
passed the -f flag, rather than prompting the user for a yes/no
* Adds the capability to use cp rather than git clone, which I need
to run this from within Nix.
* Whitelists CHANGELOG.md which shouldn't get substituted.
This commit is contained in:
Andrew Poelstra
parent
b7e38eb1e2
commit
b58a60fd6c
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@ -1,42 +1,92 @@
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#!/bin/bash
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#!/usr/bin/env bash
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set -e
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# Set default variables
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: "${SECP_VENDOR_GIT_ROOT:=$(git rev-parse --show-toplevel)}"
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SECP_SYS="$SECP_VENDOR_GIT_ROOT"/secp256k1-sys
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DEFAULT_VERSION_CODE=$(grep version "$SECP_SYS/Cargo.toml" | sed 's/\./_/g' | sed 's/.*"\(.*\)".*/\1/')
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DEFAULT_DEPEND_DIR="$SECP_SYS/depend"
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DEFAULT_SECP_REPO=https://github.com/bitcoin-core/secp256k1.git
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if [ -z "$1" ] | [ -z "$2" ]; then
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echo "\$1 parameter must be the rust-secp256k1-sys depend directory"
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echo "\$2 parameter must be the rust-secp256k1-sys version code (M_m_p format)"
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echo "\$3 parameter (optional) can be the revision to check out"
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exit 1
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: "${SECP_VENDOR_VERSION_CODE:=$DEFAULT_VERSION_CODE}"
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: "${SECP_VENDOR_DEPEND_DIR:=$DEFAULT_DEPEND_DIR}"
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: "${SECP_VENDOR_SECP_REPO:=$DEFAULT_SECP_REPO}"
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# CP_NOT_CLONE lets us just copy a directory rather than git cloning.
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# This is usually a bad idea, since it will bring in build artifacts or any other
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# junk from the source directory, but may be useful during development or CI.
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: "${SECP_VENDOR_CP_NOT_CLONE:=no}"
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echo "Using version code $SECP_VENDOR_VERSION_CODE. Set SECP_VENDOR_VERSION_CODE to override."
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echo "Using depend directory $SECP_VENDOR_DEPEND_DIR. Set SECP_VENDOR_DEPEND_DIR to override."
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echo "Using secp repository $SECP_VENDOR_SECP_REPO. Set SECP_VENDOR_SECP_REPO to override."
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# Parse command-line options
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SECP_REV=""
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FORCE=no
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while (( "$#" )); do
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case "$1" in
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-f)
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FORCE=yes
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;;
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*)
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if [ -z "$SECP_REV" ]; then
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echo "Using secp256k1 revision $SECP_REV."
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SECP_REV="$1"
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else
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echo "WARNING: ignoring unknown command-line argument $1"
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fi
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PARENT_DIR=$1
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VERSIONCODE=$2
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REV=$3
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DIR=secp256k1
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ORIGDIR=$(pwd)
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while true; do
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read -r -p "$PARENT_DIR/$DIR will be deleted [yn]: " yn
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case $yn in
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[Yy]* ) break;;
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[Nn]* ) exit;;
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* ) echo "Please answer yes or no.";;
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;;
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esac
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shift
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done
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cd "$PARENT_DIR" || exit 1
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rm -rf "$DIR"
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git clone https://github.com/bitcoin-core/secp256k1.git "$DIR"
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cd "$DIR"
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if [ -n "$REV" ]; then
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git checkout "$REV"
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if [ -z "$SECP_REV" ]; then
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echo "WARNING: No secp256k1 revision specified. Will use whatever we find at the git repo."
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fi
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HEAD=$(git rev-parse HEAD)
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cd ..
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echo "# This file was automatically created by $0" > ./secp256k1-HEAD-revision.txt
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echo "$HEAD" >> ./secp256k1-HEAD-revision.txt
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echo
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# We need to make some source changes to the files.
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# Check if we will do anything destructive.
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if [ "$FORCE" == "no" ]; then
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if ! git diff --quiet -- "*.rs"; then
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echo "ERROR: There appear to be modified source files. Check these in or pass -f (some source files will be modified to have symbols renamed)."
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exit 2
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fi
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if ! git diff --quiet -- "$SECP_VENDOR_DEPEND_DIR"; then
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echo "ERROR: The depend directory appears to be modified. Check it in or pass -f (this directory will be deleted)."
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exit 2
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fi
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fi
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DIR=./secp256k1
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pushd "$SECP_VENDOR_DEPEND_DIR" > /dev/null
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rm -rf "$DIR" || true
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# Clone the repo. As a special case, if the repo is a local path and we have
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# not specified a revision, just copy the directory rather than using 'git clone'.
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# This lets us use non-git repos or dirty source trees as secp sources.
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if [ "$SECP_VENDOR_CP_NOT_CLONE" == "yes" ]; then
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cp -r "$SECP_VENDOR_SECP_REPO" "$DIR"
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chmod -R +w "$DIR" # cp preserves write perms, which if missing will cause patch to fail
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else
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git clone "$SECP_VENDOR_SECP_REPO" "$DIR"
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fi
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# Check out specified revision
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pushd "$DIR" > /dev/null
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if [ -n "$SECP_REV" ]; then
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git checkout "$SECP_REV"
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fi
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SOURCE_REV=$(git rev-parse HEAD || echo "[unknown revision from $SECP_VENDOR_SECP_REPO]")
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rm -rf .git/ || true
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popd
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# Record revision
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echo "# This file was automatically created by $0" > ./secp256k1-HEAD-revision.txt
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echo "$SOURCE_REV" >> ./secp256k1-HEAD-revision.txt
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# Patch source files
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# To support compiling for WASM, we need to remove all methods that use malloc.
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# To compensate, the secp_context_create and _destroy methods are redefined in Rust.
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@ -46,28 +96,25 @@ patch "$DIR/src/scratch_impl.h" "./scratch_impl.h.patch"
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patch "$DIR/src/util.h" "./util.h.patch"
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# Prefix all methods with rustsecp and a version prefix
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find "$DIR" -not -path '*/\.*' -type f -print0 | xargs -0 sed -i "/^#include/! s/secp256k1_/rustsecp256k1_v${VERSIONCODE}_/g"
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find "$DIR" \
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-not -path '*/\.*' \
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-not -name "CHANGELOG.md" \
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-type f \
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-print0 | xargs -0 sed -i "/^#include/! s/secp256k1_/rustsecp256k1_v${SECP_VENDOR_VERSION_CODE}_/g"
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# special rule for a method that is not prefixed in libsecp
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find "$DIR" -not -path '*/\.*' -type f -print0 | xargs -0 sed -i "/^#include/! s/ecdsa_signature_parse_der_lax/rustsecp256k1_v${VERSIONCODE}_ecdsa_signature_parse_der_lax/g"
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# TODO: can be removed once 496c5b43b lands in secp-zkp
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find "$DIR" -not -path '*/\.*' -type f -print0 | xargs -0 sed -i 's/^const int CURVE_B/static const int CURVE_B/g'
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while true; do
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read -r -p "Update Rust extern references and Cargo.toml as well? [yn]: " yn
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case $yn in
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[Yy]* ) break;;
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[Nn]* ) exit;;
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* ) echo "Please answer yes or no.";;
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esac
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done
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cd "$ORIGDIR"
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find "$DIR" \
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-not -path '*/\.*' \
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-type f \
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-print0 | xargs -0 sed -i "/^#include/! s/ecdsa_signature_parse_der_lax/rustsecp256k1_v${SECP_VENDOR_VERSION_CODE}_ecdsa_signature_parse_der_lax/g"
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cd "$SECP_SYS"
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# Update the `links = ` in the manifest file.
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sed -i -r "s/^links = \".*\"$/links = \"rustsecp256k1_v${VERSIONCODE}\"/" Cargo.toml
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sed -i -r "s/^links = \".*\"$/links = \"rustsecp256k1_v${SECP_VENDOR_VERSION_CODE}\"/" Cargo.toml
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# Update the extern references in the Rust FFI source files.
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find "./src/" -name "*.rs" -type f -print0 | xargs -0 sed -i -r "s/rustsecp256k1_v[0-9]+_[0-9]+_[0-9]+_(.*)([\"\(])/rustsecp256k1_v${VERSIONCODE}_\1\2/g"
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find "./src/" \
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-name "*.rs" \
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-type f \
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-print0 | xargs -0 sed -i -r "s/rustsecp256k1_v[0-9]+_[0-9]+_[0-9]+_(.*)([\"\(])/rustsecp256k1_v${SECP_VENDOR_VERSION_CODE}_\1\2/g"
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popd > /dev/null
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