ci: test the new prebuilt packages

.github/workflows/ci.yml

@@ -2,7 +2,7 @@ name: CI
 on: [push, pull_request]
 jobs:
 
-  build-alpine-docker-musl-gcc:
+  alpine-docker-musl-gcc:
     name: Alpine/musl
     runs-on: ubuntu-latest
     steps:
@@ -20,7 +20,7 @@ jobs:
       with:
         entrypoint: .github/workflows/alpine.test.sh
 
-  build-osx:
+  macos:
     runs-on: macOS-10.14
     steps:
     - uses: actions/checkout@v1
@@ -46,7 +46,7 @@ jobs:
         git clone --depth 1 https://github.com/vlang/vid.git
         cd vid && ../v -o vid .
 
-  build-ubuntu:
+  ubuntu:
     runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v1
@@ -68,7 +68,16 @@ jobs:
     - name: x64 machine code generation
       run: cd examples/x64 && ../../v -x64 hello_world.v && ./hello_world
 
-  build-ubuntu-tcc:
+  ubuntu-prebuilt:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v1
+    - name: Download V
+      run: wget https://github.com/vbinaries/vbinaries/releases/download/latest/v_linux.zip
+ && unzip v_linux.zip && ./v --version
+
+
+  ubuntu-tcc:
     runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v1
@@ -85,7 +94,7 @@ jobs:
         ./v -o v2 v.v # Make sure vtcc can build itself
         ./v test v
 
-  build-ubuntu-musl:
+  ubuntu-musl:
     runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v1
@@ -101,7 +110,7 @@ jobs:
 #    - name: Test v->js
 #      run: ./v -o hi.js examples/hello_v_js.v && node hi.js
 
-  build-windows-gcc:
+  windows-gcc:
     runs-on: windows-2019
     steps:
     - uses: actions/checkout@v1
@@ -120,7 +129,7 @@ jobs:
         #.\v.exe -o hi.js examples/hello_v_js.v
         #node hi.js
 
-  build-windows-msvc:
+  windows-msvc:
     runs-on: windows-2019
     steps:
     - uses: actions/checkout@v1

vlib/os/os.v

@@ -411,10 +411,10 @@ pub:
 
 // `system` works like `exec()`, but only returns a return code.
 pub fn system(cmd string) int {
-	if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
+	//if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
 		// TODO remove panic
-		panic(';, &&, || and \\n are not allowed in shell commands')
-	}
+		//panic(';, &&, || and \\n are not allowed in shell commands')
+	//}
 	mut ret := int(0)
 	$if windows {
 		// overcome bug in system & _wsystem (cmd) when first char is quote `"`

vlib/os/os_nix.v

@@ -73,9 +73,9 @@ pub fn mkdir(path string) ?bool {
 
 // exec starts the specified command, waits for it to complete, and returns its output.
 pub fn exec(cmd string) ?Result {
-	if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
-		return error(';, &&, || and \\n are not allowed in shell commands')
-	}
+	//if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
+		//return error(';, &&, || and \\n are not allowed in shell commands')
+	//}
 	pcmd := '$cmd 2>&1'
 	f := vpopen(pcmd)
 	if isnil(f) {