Setup CI and fix some small errors

.github/workflows/ci.yml

@@ -0,0 +1,26 @@
+---
+name: Test
+on: [push, pull_request]
+
+jobs:
+  ruby:
+    name: Ruby ${{ matrix.ruby }}
+    timeout-minutes: 15
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ["ubuntu-latest"]
+        ruby: ["3.2", "3.1", "3.0", "2.7", "2.6"]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v3
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+
+      - name: Tests
+        run: ./test.sh

ext/rbtrace.c

@@ -876,9 +876,7 @@ eval_inspect(VALUE rb_code) {
 }
 
 static VALUE
-rescue_inspect(VALUE arg) {
-  VALUE exception = rb_errinfo(); /* get last exception */
-  rb_set_errinfo(Qnil);
+rescue_inspect(VALUE arg, VALUE exception) {
   return rb_funcall(exception, rb_intern("inspect"), 0);
 }
 
@@ -891,7 +889,6 @@ rbtrace__process_event(msgpack_object cmd)
   static int last_tracer_id = -1; // hax
   char query[BUF_SIZE];
 
-  char code[BUF_SIZE+150];
   VALUE val = Qnil;
 
   msgpack_object_array ary;

lib/rbtrace/cli.rb

@@ -227,8 +227,7 @@ def self.run
 
       opt :shapesdump,
         "generate a shapes dump for the process in FILENAME",
-        :default => "AUTO",
-
+        :default => "AUTO"
     end
 
     opts = Optimist.with_standard_exception_handling(parser) do

rbtrace.gemspec

@@ -23,7 +23,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'optimist', '>= 3.0.0'
   s.add_dependency 'msgpack',  '>= 0.4.3'
 
-  s.add_development_dependency "rake", "~> 10.0"
+  s.add_development_dependency "rake"
 
   s.license = "MIT"
   s.summary = 'rbtrace: like strace but for ruby code'

server.rb

@@ -1,4 +1,4 @@
-require 'ext/rbtrace'
+require 'rbtrace'
 require 'tmpdir'
 
 class String

test.sh

@@ -12,7 +12,7 @@ cd ..
 bundle check
 export RUBYOPT="-I.:lib"
 
-ruby server.rb &
+bundle exec ruby server.rb &
 export PID=$!
 
 trap cleanup INT TERM
@@ -23,11 +23,11 @@ cleanup() {
 
 trace() {
   echo ------------------------------------------
-  echo ./bin/rbtrace -p $PID $*
+  echo ./bin/rbtrace -p $PID "$@"
   echo ------------------------------------------
-  ./bin/rbtrace -p $PID $* &
+  bundle exec ./bin/rbtrace -p $PID "$@" &
   sleep 2
-  kill $!
+  kill $! || true
   wait $! || true
   echo
 }
@@ -37,6 +37,7 @@ trace -m sleep
 trace -m sleep Dir.chdir Dir.pwd Process.pid "String#gsub" "String#*"
 trace -m "Kernel#"
 trace -m "String#gsub(self,@test)" "String#*(self,__source__)" "String#multiply_vowels(self,self.length,num)"
+trace -e 'p(1 + 1)'
 trace --gc --slow=200
 trace --gc -m Dir.
 trace --slow=250