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annotate share/lua/5.2/luarocks/fs/unix/tools.lua @ 11979:f04a3527bfa9 draft
<kspalaiologos> learn the bfasm The brainfuck assembler. Documentation and samples: https://raw.githubusercontent.com/KrzysztofSzewczyk/asmbf/master/doc/bfasm.doc
author | HackEso <hackeso@esolangs.org> |
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date | Wed, 23 Oct 2019 17:51:27 +0000 |
parents | d137f631bad5 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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1 |
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2 --- fs operations implemented with third-party tools for Unix platform abstractions. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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3 module("luarocks.fs.unix.tools", package.seeall) |
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4 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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5 local fs = require("luarocks.fs") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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6 local dir = require("luarocks.dir") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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7 local cfg = require("luarocks.cfg") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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8 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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9 local dir_stack = {} |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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10 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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11 local vars = cfg.variables |
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12 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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13 local function command_at(directory, cmd) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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14 return "cd " .. fs.Q(directory) .. " && " .. cmd |
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15 end |
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16 |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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17 --- Obtain current directory. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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18 -- Uses the module's internal directory stack. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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19 -- @return string: the absolute pathname of the current directory. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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20 function current_dir() |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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21 local pipe = io.popen(vars.PWD) |
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22 local current = pipe:read("*l") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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23 pipe:close() |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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24 for _, directory in ipairs(dir_stack) do |
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25 current = fs.absolute_name(directory, current) |
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26 end |
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27 return current |
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28 end |
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29 |
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30 --- Run the given command. |
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31 -- The command is executed in the current directory in the directory stack. |
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32 -- @param cmd string: No quoting/escaping is applied to the command. |
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33 -- @return boolean: true if command succeeds (status code 0), false |
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34 -- otherwise. |
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35 function execute_string(cmd) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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36 local code = os.execute(command_at(fs.current_dir(), cmd)) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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37 if code == 0 or code == true then |
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38 return true |
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39 else |
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40 return false |
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41 end |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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42 end |
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43 |
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44 --- Change the current directory. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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45 -- Uses the module's internal directory stack. This does not have exact |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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46 -- semantics of chdir, as it does not handle errors the same way, |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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47 -- but works well for our purposes for now. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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48 -- @param directory string: The directory to switch to. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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49 function change_dir(directory) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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50 assert(type(directory) == "string") |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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51 table.insert(dir_stack, directory) |
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52 end |
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53 |
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54 --- Change directory to root. |
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55 -- Allows leaving a directory (e.g. for deleting it) in |
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56 -- a crossplatform way. |
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57 function change_dir_to_root() |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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58 table.insert(dir_stack, "/") |
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59 end |
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60 |
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61 --- Change working directory to the previous in the directory stack. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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62 function pop_dir() |
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63 local directory = table.remove(dir_stack) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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64 return directory ~= nil |
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65 end |
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66 |
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67 --- Create a directory if it does not already exist. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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68 -- If any of the higher levels in the path name does not exist |
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69 -- too, they are created as well. |
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70 -- @param directory string: pathname of directory to create. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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71 -- @return boolean: true on success, false on failure. |
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72 function make_dir(directory) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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73 assert(directory) |
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74 return fs.execute(vars.MKDIR.." -p", directory) |
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75 end |
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76 |
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77 --- Remove a directory if it is empty. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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78 -- Does not return errors (for example, if directory is not empty or |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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79 -- if already does not exist) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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80 -- @param directory string: pathname of directory to remove. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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81 function remove_dir_if_empty(directory) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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82 assert(directory) |
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83 fs.execute_string(fs.quiet(vars.RMDIR.." "..fs.Q(directory))) |
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84 end |
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85 |
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86 --- Remove a directory if it is empty. |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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87 -- Does not return errors (for example, if directory is not empty or |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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88 -- if already does not exist) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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89 -- @param directory string: pathname of directory to remove. |
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90 function remove_dir_tree_if_empty(directory) |
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<GreyKnight> (cd luabuild/luarocks-2.0.12; make install)
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91 assert(directory) |
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92 fs.execute_string(fs.quiet(vars.RMDIR.." -p "..fs.Q(directory))) |
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93 end |
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94 |
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95 --- Copy a file. |
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96 -- @param src string: Pathname of source |
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97 -- @param dest string: Pathname of destination |
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98 -- @param perm string or nil: Permissions for destination file, |
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99 -- @return boolean or (boolean, string): true on success, false on failure, |
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100 -- plus an error message. |
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101 function copy(src, dest, perm) |
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102 assert(src and dest) |
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103 if fs.execute(vars.CP, src, dest) then |
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104 if perm then |
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105 if fs.is_dir(dest) then |
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106 dest = dir.path(dest, dir.base_name(src)) |
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107 end |
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108 if fs.chmod(dest, perm) then |
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109 return true |
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110 else |
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111 return false, "Failed setting permissions of "..dest |
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112 end |
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113 end |
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114 return true |
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115 else |
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116 return false, "Failed copying "..src.." to "..dest |
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117 end |
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118 end |
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119 |
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120 --- Recursively copy the contents of a directory. |
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121 -- @param src string: Pathname of source |
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122 -- @param dest string: Pathname of destination |
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123 -- @return boolean or (boolean, string): true on success, false on failure, |
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124 -- plus an error message. |
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125 function copy_contents(src, dest) |
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126 assert(src and dest) |
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127 if fs.execute_string(fs.quiet(vars.CP.." -pPR "..fs.Q(src).."/* "..fs.Q(dest))) then |
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128 return true |
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129 else |
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130 return false, "Failed copying "..src.." to "..dest |
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131 end |
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132 end |
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133 --- Delete a file or a directory and all its contents. |
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134 -- For safety, this only accepts absolute paths. |
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135 -- @param arg string: Pathname of source |
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136 -- @return boolean: true on success, false on failure. |
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137 function delete(arg) |
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138 assert(arg) |
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139 assert(arg:sub(1,1) == "/") |
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140 return fs.execute_string(fs.quiet(vars.RM.." -rf " .. fs.Q(arg))) |
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141 end |
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142 |
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143 --- List the contents of a directory. |
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144 -- @param at string or nil: directory to list (will be the current |
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145 -- directory if none is given). |
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146 -- @return table: an array of strings with the filenames representing |
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147 -- the contents of a directory. |
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148 function list_dir(at) |
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149 assert(type(at) == "string" or not at) |
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150 if not at then |
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151 at = fs.current_dir() |
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152 end |
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153 if not fs.is_dir(at) then |
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154 return {} |
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155 end |
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156 local result = {} |
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157 local pipe = io.popen(command_at(at, vars.LS)) |
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158 for file in pipe:lines() do |
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159 table.insert(result, file) |
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160 end |
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161 pipe:close() |
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162 return result |
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163 end |
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164 |
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165 --- Recursively scan the contents of a directory. |
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166 -- @param at string or nil: directory to scan (will be the current |
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167 -- directory if none is given). |
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168 -- @return table: an array of strings with the filenames representing |
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169 -- the contents of a directory. |
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170 function find(at) |
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171 assert(type(at) == "string" or not at) |
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172 if not at then |
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173 at = fs.current_dir() |
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174 end |
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175 if not fs.is_dir(at) then |
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176 return {} |
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177 end |
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178 local result = {} |
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179 local pipe = io.popen(command_at(at, vars.FIND.." * 2>/dev/null")) |
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180 for file in pipe:lines() do |
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181 table.insert(result, file) |
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182 end |
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183 pipe:close() |
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184 return result |
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185 end |
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186 |
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187 --- Compress files in a .zip archive. |
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188 -- @param zipfile string: pathname of .zip archive to be created. |
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189 -- @param ... Filenames to be stored in the archive are given as |
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190 -- additional arguments. |
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191 -- @return boolean: true on success, false on failure. |
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192 function zip(zipfile, ...) |
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193 return fs.execute(vars.ZIP.." -r", zipfile, ...) |
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194 end |
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195 |
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196 --- Uncompress files from a .zip archive. |
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197 -- @param zipfile string: pathname of .zip archive to be extracted. |
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198 -- @return boolean: true on success, false on failure. |
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199 function unzip(zipfile) |
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200 assert(zipfile) |
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201 return fs.execute(vars.UNZIP, zipfile) |
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202 end |
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203 |
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204 --- Test is file/directory exists |
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205 -- @param file string: filename to test |
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206 -- @return boolean: true if file exists, false otherwise. |
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207 function exists(file) |
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208 assert(file) |
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209 return fs.execute(vars.TEST, "-e", file) |
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210 end |
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211 |
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212 --- Test is pathname is a directory. |
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213 -- @param file string: pathname to test |
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214 -- @return boolean: true if it is a directory, false otherwise. |
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215 function is_dir(file) |
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216 assert(file) |
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217 return fs.execute(vars.TEST, "-d", file) |
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218 end |
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219 |
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220 --- Test is pathname is a regular file. |
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221 -- @param file string: pathname to test |
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222 -- @return boolean: true if it is a regular file, false otherwise. |
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223 function is_file(file) |
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224 assert(file) |
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225 return fs.execute(vars.TEST, "-f", file) |
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226 end |
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227 |
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228 --- Download a remote file. |
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229 -- @param url string: URL to be fetched. |
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230 -- @param filename string or nil: this function attempts to detect the |
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231 -- resulting local filename of the remote file as the basename of the URL; |
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232 -- if that is not correct (due to a redirection, for example), the local |
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233 -- filename can be given explicitly as this second argument. |
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234 -- @return boolean: true on success, false on failure. |
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235 function download(url, filename) |
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236 assert(type(url) == "string") |
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237 assert(type(filename) == "string" or not filename) |
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238 |
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239 if cfg.downloader == "wget" then |
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240 local wget_cmd = vars.WGET.." --no-check-certificate --no-cache --user-agent='"..cfg.user_agent.." via wget' --quiet --continue " |
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241 if filename then |
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242 return fs.execute(wget_cmd.." --output-document ", filename, url) |
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243 else |
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244 return fs.execute(wget_cmd, url) |
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245 end |
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246 elseif cfg.downloader == "curl" then |
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247 filename = filename or dir.base_name(url) |
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248 return fs.execute_string(vars.CURL.." -L --user-agent '"..cfg.user_agent.." via curl' "..fs.Q(url).." 2> /dev/null 1> "..fs.Q(filename)) |
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249 end |
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250 end |
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251 |
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252 function chmod(pathname, mode) |
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253 if mode then |
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254 return fs.execute(vars.CHMOD, mode, pathname) |
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255 else |
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256 return false |
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257 end |
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258 end |
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259 |
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260 --- Apply a patch. |
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261 -- @param patchname string: The filename of the patch. |
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262 function apply_patch(patchname) |
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263 return fs.execute(vars.PATCH.." -p1 -f -i ", patchname) |
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264 end |
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265 |
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266 --- Unpack an archive. |
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267 -- Extract the contents of an archive, detecting its format by |
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268 -- filename extension. |
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269 -- @param archive string: Filename of archive. |
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270 -- @return boolean or (boolean, string): true on success, false and an error message on failure. |
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271 function unpack_archive(archive) |
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272 assert(type(archive) == "string") |
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273 |
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274 local ok |
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275 if archive:match("%.tar%.gz$") or archive:match("%.tgz$") then |
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276 ok = fs.execute_string(vars.GUNZIP.." -c "..archive.."|"..vars.TAR.." -xf -") |
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277 elseif archive:match("%.tar%.bz2$") then |
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278 ok = fs.execute_string(vars.BUNZIP2.." -c "..archive.."|tar -xf -") |
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279 elseif archive:match("%.zip$") then |
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280 ok = fs.execute(vars.UNZIP, archive) |
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281 elseif archive:match("%.lua$") or archive:match("%.c$") then |
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282 -- Ignore .lua and .c files; they don't need to be extracted. |
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283 return true |
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284 else |
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285 local ext = archive:match(".*(%..*)") |
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286 return false, "Unrecognized filename extension "..(ext or "") |
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287 end |
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288 if not ok then |
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289 return false, "Failed extracting "..archive |
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290 end |
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291 return true |
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292 end |
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293 |
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294 local md5_cmd = { |
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295 md5sum = vars.MD5SUM, |
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296 openssl = vars.OPENSSL.." md5", |
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297 md5 = vars.MD5, |
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298 } |
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299 |
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300 --- Get the MD5 checksum for a file. |
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301 -- @param file string: The file to be computed. |
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302 -- @return string: The MD5 checksum |
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303 function get_md5(file) |
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304 local cmd = md5_cmd[cfg.md5checker] |
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305 if not cmd then return nil end |
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306 local pipe = io.popen(cmd.." "..fs.absolute_name(file)) |
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307 local computed = pipe:read("*a") |
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308 pipe:close() |
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309 if not computed then return nil end |
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310 return computed:match("("..("%x"):rep(32)..")") |
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311 end |
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312 |
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313 function get_permissions(filename) |
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314 local pipe = io.popen(vars.STAT.." "..vars.STATFLAG.." "..fs.Q(filename)) |
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315 local ret = pipe:read("*l") |
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316 pipe:close() |
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317 return ret |
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318 end |