Mercurial > hg
annotate mercurial/exewrapper.c @ 42454:0eb8c61c306b
tests: show how the dirstate can end up containing wrong information
which can result in bad status output.
Concretely, this seems to be easily triggered by having a build system
watching the filesystem for changes, and rebuilding files that are
both tracked and generated while an update is happening.
Differential Revision: https://phab.mercurial-scm.org/D6474
author | Valentin Gatien-Baron <valentin.gatienbaron@gmail.com> |
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date | Sun, 19 May 2019 16:06:06 -0400 |
parents | ef7119cd4965 |
children | 825d5a5907b4 |
rev | line source |
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1 /* |
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2 exewrapper.c - wrapper for calling a python script on Windows |
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3 |
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4 Copyright 2012 Adrian Buehlmann <adrian@cadifra.com> and others |
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5 |
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6 This software may be used and distributed according to the terms of the |
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7 GNU General Public License version 2 or any later version. |
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8 */ |
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9 |
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10 #include <Python.h> |
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11 #include <stdio.h> |
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12 #include <tchar.h> |
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13 #include <windows.h> |
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14 |
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15 #include "hgpythonlib.h" |
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16 |
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17 #ifdef __GNUC__ |
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18 int strcat_s(char *d, size_t n, const char *s) |
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19 { |
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20 return !strncat(d, s, n); |
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21 } |
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22 int strcpy_s(char *d, size_t n, const char *s) |
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23 { |
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24 return !strncpy(d, s, n); |
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25 } |
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26 |
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27 #define _tcscpy_s strcpy_s |
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28 #define _tcscat_s strcat_s |
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29 #define _countof(array) (sizeof(array) / sizeof(array[0])) |
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30 #endif |
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31 |
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32 static TCHAR pyscript[MAX_PATH + 10]; |
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33 static TCHAR pyhome[MAX_PATH + 10]; |
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34 static TCHAR pydllfile[MAX_PATH + 10]; |
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35 |
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36 int _tmain(int argc, TCHAR *argv[]) |
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37 { |
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38 TCHAR *p; |
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39 int ret; |
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40 int i; |
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41 int n; |
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42 TCHAR **pyargv; |
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43 WIN32_FIND_DATA fdata; |
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44 HANDLE hfind; |
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45 const char *err; |
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46 HMODULE pydll; |
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47 void(__cdecl * Py_SetPythonHome)(TCHAR * home); |
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48 int(__cdecl * Py_Main)(int argc, TCHAR *argv[]); |
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49 |
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50 #if PY_MAJOR_VERSION >= 3 |
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51 Py_LegacyWindowsStdioFlag = 1; |
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52 #endif |
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53 |
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54 if (GetModuleFileName(NULL, pyscript, _countof(pyscript)) == 0) { |
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55 err = "GetModuleFileName failed"; |
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56 goto bail; |
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57 } |
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58 |
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59 p = _tcsrchr(pyscript, '.'); |
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60 if (p == NULL) { |
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61 err = "malformed module filename"; |
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62 goto bail; |
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63 } |
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64 *p = 0; /* cut trailing ".exe" */ |
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65 _tcscpy_s(pyhome, _countof(pyhome), pyscript); |
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66 |
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67 hfind = FindFirstFile(pyscript, &fdata); |
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68 if (hfind != INVALID_HANDLE_VALUE) { |
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69 /* pyscript exists, close handle */ |
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70 FindClose(hfind); |
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71 } else { |
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72 /* file pyscript isn't there, take <pyscript>exe.py */ |
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73 _tcscat_s(pyscript, _countof(pyscript), _T("exe.py")); |
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74 } |
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75 |
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76 pydll = NULL; |
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77 |
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78 p = _tcsrchr(pyhome, _T('\\')); |
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79 if (p == NULL) { |
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80 err = "can't find backslash in module filename"; |
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81 goto bail; |
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82 } |
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83 *p = 0; /* cut at directory */ |
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84 |
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85 /* check for private Python of HackableMercurial */ |
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86 _tcscat_s(pyhome, _countof(pyhome), _T("\\hg-python")); |
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87 |
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88 hfind = FindFirstFile(pyhome, &fdata); |
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89 if (hfind != INVALID_HANDLE_VALUE) { |
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90 /* Path .\hg-python exists. We are probably in HackableMercurial |
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91 scenario, so let's load python dll from this dir. */ |
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92 FindClose(hfind); |
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93 _tcscpy_s(pydllfile, _countof(pydllfile), pyhome); |
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94 _tcscat_s(pydllfile, _countof(pydllfile), |
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95 _T("\\") _T(HGPYTHONLIB) _T(".dll")); |
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96 pydll = LoadLibrary(pydllfile); |
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97 if (pydll == NULL) { |
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98 err = "failed to load private Python DLL " HGPYTHONLIB |
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99 ".dll"; |
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100 goto bail; |
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101 } |
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102 Py_SetPythonHome = |
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103 (void *)GetProcAddress(pydll, "Py_SetPythonHome"); |
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104 if (Py_SetPythonHome == NULL) { |
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105 err = "failed to get Py_SetPythonHome"; |
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106 goto bail; |
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107 } |
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108 Py_SetPythonHome(pyhome); |
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109 } |
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110 |
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111 if (pydll == NULL) { |
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112 pydll = LoadLibrary(_T(HGPYTHONLIB) _T(".dll")); |
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113 if (pydll == NULL) { |
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114 err = "failed to load Python DLL " HGPYTHONLIB ".dll"; |
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115 goto bail; |
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116 } |
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117 } |
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118 |
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119 Py_Main = (void *)GetProcAddress(pydll, "Py_Main"); |
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120 if (Py_Main == NULL) { |
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121 err = "failed to get Py_Main"; |
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122 goto bail; |
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123 } |
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124 |
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125 /* |
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126 Only add the pyscript to the args, if it's not already there. It may |
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127 already be there, if the script spawned a child process of itself, in |
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128 the same way as it got called, that is, with the pyscript already in |
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129 place. So we optionally accept the pyscript as the first argument |
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130 (argv[1]), letting our exe taking the role of the python interpreter. |
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131 */ |
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132 if (argc >= 2 && _tcscmp(argv[1], pyscript) == 0) { |
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133 /* |
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134 pyscript is already in the args, so there is no need to copy |
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135 the args and we can directly call the python interpreter with |
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136 the original args. |
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137 */ |
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138 return Py_Main(argc, argv); |
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139 } |
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140 |
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141 /* |
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142 Start assembling the args for the Python interpreter call. We put the |
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143 name of our exe (argv[0]) in the position where the python.exe |
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144 canonically is, and insert the pyscript next. |
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145 */ |
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146 pyargv = malloc((argc + 5) * sizeof(TCHAR *)); |
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147 if (pyargv == NULL) { |
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148 err = "not enough memory"; |
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149 goto bail; |
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150 } |
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151 n = 0; |
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152 pyargv[n++] = argv[0]; |
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153 pyargv[n++] = pyscript; |
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154 |
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155 /* copy remaining args from the command line */ |
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156 for (i = 1; i < argc; i++) |
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157 pyargv[n++] = argv[i]; |
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158 /* argv[argc] is guaranteed to be NULL, so we forward that guarantee */ |
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159 pyargv[n] = NULL; |
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160 |
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161 ret = Py_Main(n, pyargv); /* The Python interpreter call */ |
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162 |
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163 free(pyargv); |
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164 return ret; |
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165 |
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166 bail: |
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167 fprintf(stderr, "abort: %s\n", err); |
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168 return 255; |
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169 } |