| Daniel Dunbar | be7ada7 | 2009-09-08 05:31:18 +0000 | [diff] [blame] | 1 | import ShUtil |
| 2 | |
| 3 | class Command: |
| 4 | def __init__(self, args, redirects): |
| 5 | self.args = list(args) |
| 6 | self.redirects = list(redirects) |
| 7 | |
| 8 | def __repr__(self): |
| 9 | return 'Command(%r, %r)' % (self.args, self.redirects) |
| 10 | |
| 11 | def __cmp__(self, other): |
| 12 | if not isinstance(other, Command): |
| 13 | return -1 |
| 14 | |
| 15 | return cmp((self.args, self.redirects), |
| 16 | (other.args, other.redirects)) |
| 17 | |
| 18 | def toShell(self, file): |
| 19 | for arg in self.args: |
| 20 | if "'" not in arg: |
| 21 | quoted = "'%s'" % arg |
| 22 | elif '"' not in arg and '$' not in arg: |
| 23 | quoted = '"%s"' % arg |
| 24 | else: |
| 25 | raise NotImplementedError,'Unable to quote %r' % arg |
| 26 | print >>file, quoted, |
| 27 | |
| 28 | # For debugging / validation. |
| 29 | dequoted = list(ShUtil.ShLexer(quoted).lex()) |
| 30 | if dequoted != [arg]: |
| 31 | raise NotImplementedError,'Unable to quote %r' % arg |
| 32 | |
| 33 | for r in self.redirects: |
| 34 | if len(r[0]) == 1: |
| 35 | print >>file, "%s '%s'" % (r[0][0], r[1]), |
| 36 | else: |
| 37 | print >>file, "%s%s '%s'" % (r[0][1], r[0][0], r[1]), |
| 38 | |
| 39 | class Pipeline: |
| 40 | def __init__(self, commands, negate=False, pipe_err=False): |
| 41 | self.commands = commands |
| 42 | self.negate = negate |
| 43 | self.pipe_err = pipe_err |
| 44 | |
| 45 | def __repr__(self): |
| 46 | return 'Pipeline(%r, %r, %r)' % (self.commands, self.negate, |
| 47 | self.pipe_err) |
| 48 | |
| 49 | def __cmp__(self, other): |
| 50 | if not isinstance(other, Pipeline): |
| 51 | return -1 |
| 52 | |
| 53 | return cmp((self.commands, self.negate, self.pipe_err), |
| 54 | (other.commands, other.negate, self.pipe_err)) |
| 55 | |
| 56 | def toShell(self, file, pipefail=False): |
| 57 | if pipefail != self.pipe_err: |
| 58 | raise ValueError,'Inconsistent "pipefail" attribute!' |
| 59 | if self.negate: |
| 60 | print >>file, '!', |
| 61 | for cmd in self.commands: |
| 62 | cmd.toShell(file) |
| 63 | if cmd is not self.commands[-1]: |
| 64 | print >>file, '|\n ', |
| 65 | |
| 66 | class Seq: |
| 67 | def __init__(self, lhs, op, rhs): |
| 68 | assert op in (';', '&', '||', '&&') |
| 69 | self.op = op |
| 70 | self.lhs = lhs |
| 71 | self.rhs = rhs |
| 72 | |
| 73 | def __repr__(self): |
| 74 | return 'Seq(%r, %r, %r)' % (self.lhs, self.op, self.rhs) |
| 75 | |
| 76 | def __cmp__(self, other): |
| 77 | if not isinstance(other, Seq): |
| 78 | return -1 |
| 79 | |
| 80 | return cmp((self.lhs, self.op, self.rhs), |
| 81 | (other.lhs, other.op, other.rhs)) |
| 82 | |
| 83 | def toShell(self, file, pipefail=False): |
| 84 | self.lhs.toShell(file, pipefail) |
| 85 | print >>file, ' %s\n' % self.op |
| 86 | self.rhs.toShell(file, pipefail) |