Mercurial > hg
annotate mercurial/diffhelpers.c @ 29132:12769703d4ba
dispatch: always load extensions before running shell aliases (issue5230)
Before this patch, we may or may not load extensions for shell aliases
depending on whether the command is abbreviated or not.
Loading extensions may have useful side effects to shell aliases. For example,
the pager extension does not work for shell aliases.
This patch removes the code checking shell aliases before loading extensions
to give the user a more consistent experience. It may hurt performance for
shell aliases a bit without chg but the correctness seems worth it. It will
also make the behavior consistent with chg since chg will always load all
extensions before running commands.
author | Jun Wu <quark@fb.com> |
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date | Sat, 07 May 2016 14:12:23 +0100 |
parents | f1c127df7c4f |
children | 2f51f4c535d2 |
rev | line source |
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1 /* |
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2 * diffhelpers.c - helper routines for mpatch |
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3 * |
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4 * Copyright 2007 Chris Mason <chris.mason@oracle.com> |
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5 * |
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6 * This software may be used and distributed according to the terms |
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7 * of the GNU General Public License v2, incorporated herein by reference. |
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8 */ |
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9 |
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10 #include <Python.h> |
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11 #include <stdlib.h> |
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12 #include <string.h> |
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13 |
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14 #include "util.h" |
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15 |
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16 static char diffhelpers_doc[] = "Efficient diff parsing"; |
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17 static PyObject *diffhelpers_Error; |
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18 |
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19 |
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20 /* fixup the last lines of a and b when the patch has no newline at eof */ |
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21 static void _fix_newline(PyObject *hunk, PyObject *a, PyObject *b) |
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22 { |
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23 Py_ssize_t hunksz = PyList_Size(hunk); |
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24 PyObject *s = PyList_GET_ITEM(hunk, hunksz-1); |
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25 char *l = PyBytes_AsString(s); |
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26 Py_ssize_t alen = PyList_Size(a); |
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27 Py_ssize_t blen = PyList_Size(b); |
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28 char c = l[0]; |
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29 PyObject *hline; |
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30 Py_ssize_t sz = PyBytes_GET_SIZE(s); |
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31 |
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32 if (sz > 1 && l[sz-2] == '\r') |
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33 /* tolerate CRLF in last line */ |
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34 sz -= 1; |
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35 |
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36 hline = PyBytes_FromStringAndSize(l, sz-1); |
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37 if (!hline) { |
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38 return; |
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39 } |
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40 |
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41 if (c == ' ' || c == '+') { |
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42 PyObject *rline = PyBytes_FromStringAndSize(l + 1, sz - 2); |
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43 PyList_SetItem(b, blen-1, rline); |
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44 } |
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45 if (c == ' ' || c == '-') { |
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46 Py_INCREF(hline); |
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47 PyList_SetItem(a, alen-1, hline); |
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48 } |
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49 PyList_SetItem(hunk, hunksz-1, hline); |
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50 } |
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51 |
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52 /* python callable form of _fix_newline */ |
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53 static PyObject * |
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54 fix_newline(PyObject *self, PyObject *args) |
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55 { |
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56 PyObject *hunk, *a, *b; |
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57 if (!PyArg_ParseTuple(args, "OOO", &hunk, &a, &b)) |
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58 return NULL; |
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59 _fix_newline(hunk, a, b); |
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60 return Py_BuildValue("l", 0); |
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61 } |
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62 |
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63 #if (PY_VERSION_HEX < 0x02050000) |
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64 static const char *addlines_format = "OOiiOO"; |
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65 #else |
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66 static const char *addlines_format = "OOnnOO"; |
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67 #endif |
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68 |
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69 /* |
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70 * read lines from fp into the hunk. The hunk is parsed into two arrays |
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71 * a and b. a gets the old state of the text, b gets the new state |
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72 * The control char from the hunk is saved when inserting into a, but not b |
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73 * (for performance while deleting files) |
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74 */ |
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75 static PyObject * |
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76 addlines(PyObject *self, PyObject *args) |
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77 { |
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78 |
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79 PyObject *fp, *hunk, *a, *b, *x; |
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80 Py_ssize_t i; |
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81 Py_ssize_t lena, lenb; |
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82 Py_ssize_t num; |
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83 Py_ssize_t todoa, todob; |
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84 char *s, c; |
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85 PyObject *l; |
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86 if (!PyArg_ParseTuple(args, addlines_format, |
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87 &fp, &hunk, &lena, &lenb, &a, &b)) |
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88 return NULL; |
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89 |
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90 while (1) { |
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91 todoa = lena - PyList_Size(a); |
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92 todob = lenb - PyList_Size(b); |
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93 num = todoa > todob ? todoa : todob; |
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94 if (num == 0) |
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95 break; |
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96 for (i = 0; i < num; i++) { |
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97 x = PyFile_GetLine(fp, 0); |
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98 s = PyBytes_AsString(x); |
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99 c = *s; |
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100 if (strcmp(s, "\\ No newline at end of file\n") == 0) { |
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101 _fix_newline(hunk, a, b); |
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102 continue; |
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103 } |
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104 if (c == '\n') { |
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105 /* Some patches may be missing the control char |
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106 * on empty lines. Supply a leading space. */ |
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107 Py_DECREF(x); |
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108 x = PyBytes_FromString(" \n"); |
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109 } |
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110 PyList_Append(hunk, x); |
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111 if (c == '+') { |
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112 l = PyBytes_FromString(s + 1); |
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113 PyList_Append(b, l); |
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114 Py_DECREF(l); |
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115 } else if (c == '-') { |
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116 PyList_Append(a, x); |
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117 } else { |
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118 l = PyBytes_FromString(s + 1); |
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119 PyList_Append(b, l); |
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120 Py_DECREF(l); |
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121 PyList_Append(a, x); |
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122 } |
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123 Py_DECREF(x); |
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124 } |
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125 } |
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126 return Py_BuildValue("l", 0); |
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127 } |
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128 |
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129 /* |
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130 * compare the lines in a with the lines in b. a is assumed to have |
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131 * a control char at the start of each line, this char is ignored in the |
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132 * compare |
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133 */ |
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134 static PyObject * |
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135 testhunk(PyObject *self, PyObject *args) |
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136 { |
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137 |
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138 PyObject *a, *b; |
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139 long bstart; |
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140 Py_ssize_t alen, blen; |
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141 Py_ssize_t i; |
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142 char *sa, *sb; |
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143 |
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144 if (!PyArg_ParseTuple(args, "OOl", &a, &b, &bstart)) |
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145 return NULL; |
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146 alen = PyList_Size(a); |
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147 blen = PyList_Size(b); |
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148 if (alen > blen - bstart || bstart < 0) { |
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149 return Py_BuildValue("l", -1); |
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150 } |
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151 for (i = 0; i < alen; i++) { |
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152 sa = PyBytes_AsString(PyList_GET_ITEM(a, i)); |
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153 sb = PyBytes_AsString(PyList_GET_ITEM(b, i + bstart)); |
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154 if (strcmp(sa + 1, sb) != 0) |
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155 return Py_BuildValue("l", -1); |
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156 } |
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157 return Py_BuildValue("l", 0); |
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158 } |
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159 |
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160 static PyMethodDef methods[] = { |
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161 {"addlines", addlines, METH_VARARGS, "add lines to a hunk\n"}, |
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162 {"fix_newline", fix_newline, METH_VARARGS, "fixup newline counters\n"}, |
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163 {"testhunk", testhunk, METH_VARARGS, "test lines in a hunk\n"}, |
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164 {NULL, NULL} |
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165 }; |
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166 |
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167 #ifdef IS_PY3K |
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168 static struct PyModuleDef diffhelpers_module = { |
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169 PyModuleDef_HEAD_INIT, |
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170 "diffhelpers", |
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171 diffhelpers_doc, |
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172 -1, |
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173 methods |
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174 }; |
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175 |
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176 PyMODINIT_FUNC PyInit_diffhelpers(void) |
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177 { |
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178 PyObject *m; |
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179 |
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180 m = PyModule_Create(&diffhelpers_module); |
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181 if (m == NULL) |
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182 return NULL; |
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183 |
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184 diffhelpers_Error = PyErr_NewException("diffhelpers.diffhelpersError", |
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185 NULL, NULL); |
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186 Py_INCREF(diffhelpers_Error); |
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187 PyModule_AddObject(m, "diffhelpersError", diffhelpers_Error); |
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188 |
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189 return m; |
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190 } |
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191 #else |
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192 PyMODINIT_FUNC |
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193 initdiffhelpers(void) |
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194 { |
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195 Py_InitModule3("diffhelpers", methods, diffhelpers_doc); |
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196 diffhelpers_Error = PyErr_NewException("diffhelpers.diffhelpersError", |
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197 NULL, NULL); |
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198 } |
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199 #endif |