add os.system

src/pylib/Lib/os.nim

@@ -1,22 +1,22 @@
-
-## see docs.python.org/3/library/os.html
-## 
-## Also export everything of std/os
-## 
-## as the following will fail to compile:
-## 
-## ```Nim
-## import std/os
-## import pylib/Lib/os
-## os.path.join ...
-## ```
-## 
-## not completed yet
-
-import std/os
-export os
-
-import ./os_impl/[consts, posix_like, utils, path]
-export consts, posix_like, utils, path
-
-
+
+## see docs.python.org/3/library/os.html
+## 
+## Also export everything of std/os
+## 
+## as the following will fail to compile:
+## 
+## ```Nim
+## import std/os
+## import pylib/Lib/os
+## os.path.join ...
+## ```
+## 
+## not completed yet
+
+import std/os
+export os
+
+import ./os_impl/[consts, posix_like, subp, utils, path]
+export consts, posix_like, subp, utils, path
+
+

src/pylib/Lib/os_impl/subp.nim

@@ -0,0 +1,26 @@
+
+
+when not defined(js):
+  proc c_system(cmd: cstring): cint{.importc: "system", header: "<stdlib.h>".}
+
+func system*(cmd: string): int{.discardable.} =
+  ## os.system
+  runnableExamples:
+    const
+      # can use `os.devnull`
+      mydevnull = when defined(windows): "nul" else: "/dev/null"
+      e2null = "echo 1 >" & mydevnull
+    assert system(e2null) == 0
+
+  when defined(js):
+    let jsStr = cmd.cstring
+    var res: c_int
+    asm """
+    const {exec} = require('node:child_process');
+    let childProcess = exec(`jsStr`);
+    `res` = childProcess.exitCode;
+    """
+    result = res.int
+  else:
+    c_system cmd.cstring
+