ci: Add downstream project build testing (bp #13112) (#13119)

* Use local cargo for CI

(cherry picked from commit c7c50bd32c)

* Add downstream project build testing

(cherry picked from commit c7f4f15e60)

Co-authored-by: Michael Vines <mvines@gmail.com>

scripts/build-downstream-projects.sh

@@ -0,0 +1,104 @@
+#!/usr/bin/env bash
+#
+# Builds known downstream projects against local solana source
+#
+
+set -e
+cd "$(dirname "$0")"/..
+source ci/_
+source scripts/read-cargo-variable.sh
+
+solana_ver=$(readCargoVariable version sdk/Cargo.toml)
+solana_dir=$PWD
+
+mkdir -p target/downstream-projects
+cd target/downstream-projects
+
+update_solana_dependencies() {
+  declare tomls=()
+  while IFS='' read -r line; do tomls+=("$line"); done < <(find "$1" -name Cargo.toml)
+
+  sed -i -e "s#\(solana-sdk = \"\).*\(\"\)#\1$solana_ver\2#g" "${tomls[@]}" || return $?
+  sed -i -e "s#\(solana-sdk = { version = \"\).*\(\"\)#\1$solana_ver\2#g" "${tomls[@]}" || return $?
+  sed -i -e "s#\(solana-client = \"\).*\(\"\)#\1$solana_ver\2#g" "${tomls[@]}" || return $?
+}
+
+update_spl_token_dependencies() {
+  declare tomls=()
+  while IFS='' read -r line; do tomls+=("$line"); done < <(find "$1" -name Cargo.toml)
+
+  declare spl_token_ver="$2"
+  sed -i -e "s#\(spl-token = { version = \"\).*\(\"\)#\1$spl_token_ver\2#g" "${tomls[@]}" || return $?
+}
+
+patch_crates_io() {
+  cat >> "$1" <<EOF
+[patch.crates-io]
+solana-client = { path = "$solana_dir/client"}
+solana-sdk = { path = "$solana_dir/sdk" }
+EOF
+}
+
+example_helloworld() {
+  (
+    set -x
+    rm -rf example-helloworld
+    git clone https://github.com/solana-labs/example-helloworld.git
+    cd example-helloworld
+
+    update_solana_dependencies src/program-rust
+    patch_crates_io src/program-rust/Cargo.toml
+    echo "[workspace]" >> src/program-rust/Cargo.toml
+
+    "$solana_dir"/cargo-build-bpf \
+      --manifest-path src/program-rust/Cargo.toml \
+      --no-default-features --features program
+
+    # TODO: Build src/program-c/...
+  )
+}
+
+spl() {
+  (
+    set -x
+    rm -rf spl
+    git clone https://github.com/solana-labs/solana-program-library.git spl
+    cd spl
+
+    update_solana_dependencies .
+    patch_crates_io Cargo.toml
+
+    "$solana_dir"/cargo-build-bpf \
+      --manifest-path memo/program/Cargo.toml \
+      --no-default-features --features program
+
+    "$solana_dir"/cargo-build-bpf \
+      --manifest-path token/program/Cargo.toml \
+      --no-default-features --features program
+  )
+}
+
+serum_dex() {
+  (
+    set -x
+    rm -rf serum-dex
+    git clone https://github.com/project-serum/serum-dex.git  # TODO: Consider using a tag
+    cd serum-dex
+
+    update_solana_dependencies .
+    update_spl_token_dependencies . 2.0.8
+    patch_crates_io Cargo.toml
+    patch_crates_io dex/Cargo.toml
+    echo "[workspace]" >> dex/Cargo.toml
+
+    "$solana_dir"/cargo stable build
+
+    "$solana_dir"/cargo-build-bpf \
+      --manifest-path dex/Cargo.toml --no-default-features --features program
+  )
+}
+
+
+_ example_helloworld
+_ spl
+_ serum_dex