| Tom Rini | 83d290c | 2018-05-06 17:58:06 -0400 | [diff] [blame^] | 1 | # SPDX-License-Identifier: GPL-2.0+ |
| Simon Glass | 1f1864b | 2016-07-25 18:59:08 -0600 | [diff] [blame] | 2 | # |
| 3 | # Copyright (c) 2016 Google, Inc |
| 4 | # |
| Simon Glass | 1f1864b | 2016-07-25 18:59:08 -0600 | [diff] [blame] | 5 | |
| 6 | import os |
| 7 | import shutil |
| 8 | import tempfile |
| 9 | |
| 10 | import tout |
| 11 | |
| 12 | outdir = None |
| 13 | indirs = None |
| 14 | preserve_outdir = False |
| 15 | |
| 16 | def PrepareOutputDir(dirname, preserve=False): |
| 17 | """Select an output directory, ensuring it exists. |
| 18 | |
| 19 | This either creates a temporary directory or checks that the one supplied |
| 20 | by the user is valid. For a temporary directory, it makes a note to |
| 21 | remove it later if required. |
| 22 | |
| 23 | Args: |
| 24 | dirname: a string, name of the output directory to use to store |
| 25 | intermediate and output files. If is None - create a temporary |
| 26 | directory. |
| 27 | preserve: a Boolean. If outdir above is None and preserve is False, the |
| 28 | created temporary directory will be destroyed on exit. |
| 29 | |
| 30 | Raises: |
| 31 | OSError: If it cannot create the output directory. |
| 32 | """ |
| 33 | global outdir, preserve_outdir |
| 34 | |
| 35 | preserve_outdir = dirname or preserve |
| 36 | if dirname: |
| 37 | outdir = dirname |
| 38 | if not os.path.isdir(outdir): |
| 39 | try: |
| 40 | os.makedirs(outdir) |
| 41 | except OSError as err: |
| 42 | raise CmdError("Cannot make output directory '%s': '%s'" % |
| 43 | (outdir, err.strerror)) |
| 44 | tout.Debug("Using output directory '%s'" % outdir) |
| 45 | else: |
| 46 | outdir = tempfile.mkdtemp(prefix='binman.') |
| 47 | tout.Debug("Using temporary directory '%s'" % outdir) |
| 48 | |
| 49 | def _RemoveOutputDir(): |
| 50 | global outdir |
| 51 | |
| 52 | shutil.rmtree(outdir) |
| 53 | tout.Debug("Deleted temporary directory '%s'" % outdir) |
| 54 | outdir = None |
| 55 | |
| 56 | def FinaliseOutputDir(): |
| 57 | global outdir, preserve_outdir |
| 58 | |
| 59 | """Tidy up: delete output directory if temporary and not preserved.""" |
| 60 | if outdir and not preserve_outdir: |
| 61 | _RemoveOutputDir() |
| 62 | |
| 63 | def GetOutputFilename(fname): |
| 64 | """Return a filename within the output directory. |
| 65 | |
| 66 | Args: |
| 67 | fname: Filename to use for new file |
| 68 | |
| 69 | Returns: |
| 70 | The full path of the filename, within the output directory |
| 71 | """ |
| 72 | return os.path.join(outdir, fname) |
| 73 | |
| 74 | def _FinaliseForTest(): |
| 75 | """Remove the output directory (for use by tests)""" |
| 76 | global outdir |
| 77 | |
| 78 | if outdir: |
| 79 | _RemoveOutputDir() |
| 80 | |
| 81 | def SetInputDirs(dirname): |
| 82 | """Add a list of input directories, where input files are kept. |
| 83 | |
| 84 | Args: |
| 85 | dirname: a list of paths to input directories to use for obtaining |
| 86 | files needed by binman to place in the image. |
| 87 | """ |
| 88 | global indir |
| 89 | |
| 90 | indir = dirname |
| 91 | tout.Debug("Using input directories %s" % indir) |
| 92 | |
| 93 | def GetInputFilename(fname): |
| 94 | """Return a filename for use as input. |
| 95 | |
| 96 | Args: |
| 97 | fname: Filename to use for new file |
| 98 | |
| 99 | Returns: |
| 100 | The full path of the filename, within the input directory |
| 101 | """ |
| 102 | if not indir: |
| 103 | return fname |
| 104 | for dirname in indir: |
| 105 | pathname = os.path.join(dirname, fname) |
| 106 | if os.path.exists(pathname): |
| 107 | return pathname |
| 108 | |
| 109 | raise ValueError("Filename '%s' not found in input path (%s)" % |
| 110 | (fname, ','.join(indir))) |
| 111 | |
| 112 | def Align(pos, align): |
| 113 | if align: |
| 114 | mask = align - 1 |
| 115 | pos = (pos + mask) & ~mask |
| 116 | return pos |
| 117 | |
| 118 | def NotPowerOfTwo(num): |
| 119 | return num and (num & (num - 1)) |