From: stevenknight Date: Sun, 24 Oct 2004 14:29:53 +0000 (+0000) Subject: Refactor to separate shell processing from command execution. X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=ad84053d9315acad3e8208ac8b37038f2843d8ea;p=scons.git Refactor to separate shell processing from command execution. git-svn-id: http://scons.tigris.org/svn/scons/trunk@1142 fdb21ef1-2011-0410-befe-b5e4ea1792b1 --- diff --git a/src/engine/SCons/Platform/posix.py b/src/engine/SCons/Platform/posix.py index f64d272e..24ce2fb5 100644 --- a/src/engine/SCons/Platform/posix.py +++ b/src/engine/SCons/Platform/posix.py @@ -57,42 +57,28 @@ def escape(arg): return '"' + arg + '"' -def _get_env_command(sh, escape, cmd, args, env): - if env: - s = 'env - ' - for key in env.keys(): - s = s + '%s=%s '%(key, escape(env[key])) - s = s + sh + ' -c ' - s = s + escape(string.join(args)) - else: - s = string.join(args) - return s - -def env_spawn(sh, escape, cmd, args, env): - s = _get_env_command( sh, escape, cmd, args, env) - stat = os.system(s) +def exec_system(l, env): + stat = os.system(string.join(l)) if stat & 0xff: return stat | 0x80 return stat >> 8 -def spawn_spawn(sh, escape, cmd, args, env): - args = [sh, '-c', string.join(args)] - stat = os.spawnvpe(os.P_WAIT, sh, args, env) +def exec_spawnvpe(l, env): + stat = os.spawnvpe(os.P_WAIT, l[0], l, env) # os.spawnvpe() returns the actual exit code, not the encoding # returned by os.waitpid() or os.system(). return stat -def fork_spawn(sh, escape, cmd, args, env): +def exec_fork(l, env): pid = os.fork() if not pid: # Child process. exitval = 127 - args = [sh, '-c', string.join(args)] try: - os.execvpe(sh, args, env) + os.execvpe(l[0], l, env) except OSError, e: exitval = exitvalmap[e[0]] - sys.stderr.write("scons: %s: %s\n" % (cmd, e[1])) + sys.stderr.write("scons: %s: %s\n" % (l[0], e[1])) os._exit(exitval) else: # Parent process. @@ -101,6 +87,24 @@ def fork_spawn(sh, escape, cmd, args, env): return stat | 0x80 return stat >> 8 +def _get_env_command(sh, escape, cmd, args, env): + s = string.join(args) + if env: + l = ['env', '-'] + \ + map(lambda t, e=escape: t[0]+'='+e(t[1]), env.items()) + \ + [sh, '-c', escape(s)] + s = string.join(l) + return s + +def env_spawn(sh, escape, cmd, args, env): + return exec_system([_get_env_command( sh, escape, cmd, args, env)], env) + +def spawnvpe_spawn(sh, escape, cmd, args, env): + return exec_spawnvpe([sh, '-c', string.join(args)], env) + +def fork_spawn(sh, escape, cmd, args, env): + return exec_fork([sh, '-c', string.join(args)], env) + def process_cmd_output(cmd_stdout, cmd_stderr, stdout, stderr): stdout_eof = stderr_eof = 0 while not (stdout_eof and stderr_eof): @@ -119,21 +123,16 @@ def process_cmd_output(cmd_stdout, cmd_stderr, stdout, stderr): else: #sys.__stderr__.write( "str(stderr) = %s\n" % str ) stderr.write(str) - -def piped_env_spawn(sh, escape, cmd, args, env, stdout, stderr): - # spawn using Popen3 combined with the env command - # the command name and the command's stdout is written to stdout - # the command's stderr is written to stderr - s = _get_env_command( sh, escape, cmd, args, env) - proc = popen2.Popen3(s, 1) +def exec_popen3(l, env, stdout, stderr): + proc = popen2.Popen3(string.join(l), 1) process_cmd_output(proc.fromchild, proc.childerr, stdout, stderr) stat = proc.wait() if stat & 0xff: return stat | 0x80 return stat >> 8 -def piped_fork_spawn(sh, escape, cmd, args, env, stdout, stderr): +def exec_piped_fork(l, env, stdout, stderr): # spawn using fork / exec and providing a pipe for the command's # stdout / stderr stream if stdout != stderr: @@ -156,12 +155,11 @@ def piped_fork_spawn(sh, escape, cmd, args, env, stdout, stderr): if stdout != stderr: os.close( wFdErr ) exitval = 127 - args = [sh, '-c', string.join(args)] try: - os.execvpe(sh, args, env) + os.execvpe(l[0], l, env) except OSError, e: exitval = exitvalmap[e[0]] - stderr.write("scons: %s: %s\n" % (cmd, e[1])) + stderr.write("scons: %s: %s\n" % (l[0], e[1])) os._exit(exitval) else: # Parent process @@ -182,6 +180,19 @@ def piped_fork_spawn(sh, escape, cmd, args, env, stdout, stderr): return stat | 0x80 return stat >> 8 +def piped_env_spawn(sh, escape, cmd, args, env, stdout, stderr): + # spawn using Popen3 combined with the env command + # the command name and the command's stdout is written to stdout + # the command's stderr is written to stderr + return exec_popen3([_get_env_command(sh, escape, cmd, args, env)], + env, stdout, stderr) + +def piped_fork_spawn(sh, escape, cmd, args, env, stdout, stderr): + # spawn using fork / exec and providing a pipe for the command's + # stdout / stderr stream + return exec_piped_fork([sh, '-c', string.join(args)], + env, stdout, stderr) + def generate(env): @@ -199,7 +210,7 @@ def generate(env): # not be a default that works best for all users. if os.__dict__.has_key('spawnvpe'): - spawn = spawn_spawn + spawn = spawnvpe_spawn elif env.Detect('env'): spawn = env_spawn else: diff --git a/src/engine/SCons/Platform/win32.py b/src/engine/SCons/Platform/win32.py index d3c674b0..62f2ee7e 100644 --- a/src/engine/SCons/Platform/win32.py +++ b/src/engine/SCons/Platform/win32.py @@ -177,18 +177,19 @@ def piped_spawn(sh, escape, cmd, args, env, stdout, stderr): pass return ret +def exec_spawn(l, env): + try: + result = os.spawnve(os.P_WAIT, l[0], l, env) + except OSError, e: + result = exitvalmap[e[0]] + sys.stderr.write("scons: %s: %s\n" % (l[0], e[1])) + return result + def spawn(sh, escape, cmd, args, env): if not sh: sys.stderr.write("scons: Could not find command interpreter, is it in your PATH?\n") return 127 - else: - try: - args = [sh, '/C', escape(string.join(args)) ] - ret = os.spawnve(os.P_WAIT, sh, args, env) - except OSError, e: - ret = exitvalmap[e[0]] - sys.stderr.write("scons: %s: %s\n" % (cmd, e[1])) - return ret + return exec_spawn([sh, '/C', escape(string.join(args))], env) # Windows does not allow special characters in file names anyway, so # no need for a complex escape function, we will just quote the arg.