Mercurial > hg
annotate mercurial/formatter.py @ 34375:ebf2c1b0c70c
formatter: remove superfluous pass statements
author | Augie Fackler <augie@google.com> |
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date | Sat, 30 Sep 2017 07:44:08 -0400 |
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16134 | 1 # formatter.py - generic output formatting for mercurial |
2 # | |
3 # Copyright 2012 Matt Mackall <mpm@selenic.com> | |
4 # | |
5 # This software may be used and distributed according to the terms of the | |
6 # GNU General Public License version 2 or any later version. | |
7 | |
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8 """Generic output formatting for Mercurial |
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9 |
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10 The formatter provides API to show data in various ways. The following |
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11 functions should be used in place of ui.write(): |
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12 |
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13 - fm.write() for unconditional output |
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14 - fm.condwrite() to show some extra data conditionally in plain output |
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15 - fm.context() to provide changectx to template output |
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16 - fm.data() to provide extra data to JSON or template output |
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17 - fm.plain() to show raw text that isn't provided to JSON or template output |
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18 |
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19 To show structured data (e.g. date tuples, dicts, lists), apply fm.format*() |
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20 beforehand so the data is converted to the appropriate data type. Use |
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21 fm.isplain() if you need to convert or format data conditionally which isn't |
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22 supported by the formatter API. |
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23 |
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24 To build nested structure (i.e. a list of dicts), use fm.nested(). |
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25 |
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26 See also https://www.mercurial-scm.org/wiki/GenericTemplatingPlan |
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27 |
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28 fm.condwrite() vs 'if cond:': |
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29 |
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30 In most cases, use fm.condwrite() so users can selectively show the data |
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31 in template output. If it's costly to build data, use plain 'if cond:' with |
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32 fm.write(). |
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33 |
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34 fm.nested() vs fm.formatdict() (or fm.formatlist()): |
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35 |
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36 fm.nested() should be used to form a tree structure (a list of dicts of |
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37 lists of dicts...) which can be accessed through template keywords, e.g. |
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38 "{foo % "{bar % {...}} {baz % {...}}"}". On the other hand, fm.formatdict() |
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39 exports a dict-type object to template, which can be accessed by e.g. |
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40 "{get(foo, key)}" function. |
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41 |
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42 Doctest helper: |
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43 |
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44 >>> def show(fn, verbose=False, **opts): |
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45 ... import sys |
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46 ... from . import ui as uimod |
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47 ... ui = uimod.ui() |
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48 ... ui.verbose = verbose |
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49 ... ui.pushbuffer() |
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50 ... try: |
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51 ... return fn(ui, ui.formatter(pycompat.sysbytes(fn.__name__), |
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52 ... pycompat.byteskwargs(opts))) |
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53 ... finally: |
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54 ... print(pycompat.sysstr(ui.popbuffer()), end='') |
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55 |
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56 Basic example: |
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57 |
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58 >>> def files(ui, fm): |
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59 ... files = [(b'foo', 123, (0, 0)), (b'bar', 456, (1, 0))] |
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60 ... for f in files: |
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61 ... fm.startitem() |
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62 ... fm.write(b'path', b'%s', f[0]) |
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63 ... fm.condwrite(ui.verbose, b'date', b' %s', |
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64 ... fm.formatdate(f[2], b'%Y-%m-%d %H:%M:%S')) |
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65 ... fm.data(size=f[1]) |
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66 ... fm.plain(b'\\n') |
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67 ... fm.end() |
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68 >>> show(files) |
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69 foo |
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70 bar |
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71 >>> show(files, verbose=True) |
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72 foo 1970-01-01 00:00:00 |
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73 bar 1970-01-01 00:00:01 |
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74 >>> show(files, template=b'json') |
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75 [ |
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76 { |
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77 "date": [0, 0], |
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78 "path": "foo", |
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79 "size": 123 |
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80 }, |
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81 { |
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82 "date": [1, 0], |
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83 "path": "bar", |
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84 "size": 456 |
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85 } |
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86 ] |
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87 >>> show(files, template=b'path: {path}\\ndate: {date|rfc3339date}\\n') |
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88 path: foo |
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89 date: 1970-01-01T00:00:00+00:00 |
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90 path: bar |
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91 date: 1970-01-01T00:00:01+00:00 |
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92 |
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93 Nested example: |
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94 |
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95 >>> def subrepos(ui, fm): |
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96 ... fm.startitem() |
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97 ... fm.write(b'repo', b'[%s]\\n', b'baz') |
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98 ... files(ui, fm.nested(b'files')) |
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99 ... fm.end() |
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100 >>> show(subrepos) |
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101 [baz] |
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102 foo |
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103 bar |
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104 >>> show(subrepos, template=b'{repo}: {join(files % "{path}", ", ")}\\n') |
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105 baz: foo, bar |
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106 """ |
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107 |
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108 from __future__ import absolute_import, print_function |
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109 |
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110 import collections |
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111 import contextlib |
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112 import itertools |
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113 import os |
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114 |
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115 from .i18n import _ |
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116 from .node import ( |
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117 hex, |
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118 short, |
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119 ) |
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120 |
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121 from . import ( |
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122 error, |
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123 pycompat, |
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124 templatefilters, |
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125 templatekw, |
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126 templater, |
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127 util, |
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128 ) |
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129 |
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130 pickle = util.pickle |
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131 |
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132 class _nullconverter(object): |
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133 '''convert non-primitive data types to be processed by formatter''' |
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134 |
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135 # set to True if context object should be stored as item |
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136 storecontext = False |
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137 |
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138 @staticmethod |
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139 def formatdate(date, fmt): |
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140 '''convert date tuple to appropriate format''' |
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141 return date |
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142 @staticmethod |
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143 def formatdict(data, key, value, fmt, sep): |
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144 '''convert dict or key-value pairs to appropriate dict format''' |
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145 # use plain dict instead of util.sortdict so that data can be |
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146 # serialized as a builtin dict in pickle output |
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147 return dict(data) |
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148 @staticmethod |
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149 def formatlist(data, name, fmt, sep): |
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150 '''convert iterable to appropriate list format''' |
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151 return list(data) |
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152 |
16134 | 153 class baseformatter(object): |
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154 def __init__(self, ui, topic, opts, converter): |
16134 | 155 self._ui = ui |
156 self._topic = topic | |
157 self._style = opts.get("style") | |
158 self._template = opts.get("template") | |
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159 self._converter = converter |
16134 | 160 self._item = None |
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161 # function to convert node to string suitable for this output |
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162 self.hexfunc = hex |
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163 def __enter__(self): |
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164 return self |
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165 def __exit__(self, exctype, excvalue, traceback): |
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166 if exctype is None: |
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167 self.end() |
16134 | 168 def _showitem(self): |
169 '''show a formatted item once all data is collected''' | |
170 def startitem(self): | |
171 '''begin an item in the format list''' | |
172 if self._item is not None: | |
173 self._showitem() | |
174 self._item = {} | |
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175 def formatdate(self, date, fmt='%a %b %d %H:%M:%S %Y %1%2'): |
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176 '''convert date tuple to appropriate format''' |
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177 return self._converter.formatdate(date, fmt) |
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178 def formatdict(self, data, key='key', value='value', fmt='%s=%s', sep=' '): |
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179 '''convert dict or key-value pairs to appropriate dict format''' |
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180 return self._converter.formatdict(data, key, value, fmt, sep) |
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181 def formatlist(self, data, name, fmt='%s', sep=' '): |
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182 '''convert iterable to appropriate list format''' |
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183 # name is mandatory argument for now, but it could be optional if |
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184 # we have default template keyword, e.g. {item} |
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185 return self._converter.formatlist(data, name, fmt, sep) |
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186 def context(self, **ctxs): |
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187 '''insert context objects to be used to render template keywords''' |
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188 ctxs = pycompat.byteskwargs(ctxs) |
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189 assert all(k == 'ctx' for k in ctxs) |
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190 if self._converter.storecontext: |
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191 self._item.update(ctxs) |
16134 | 192 def data(self, **data): |
193 '''insert data into item that's not shown in default output''' | |
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194 data = pycompat.byteskwargs(data) |
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195 self._item.update(data) |
16134 | 196 def write(self, fields, deftext, *fielddata, **opts): |
197 '''do default text output while assigning data to item''' | |
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198 fieldkeys = fields.split() |
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199 assert len(fieldkeys) == len(fielddata) |
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200 self._item.update(zip(fieldkeys, fielddata)) |
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201 def condwrite(self, cond, fields, deftext, *fielddata, **opts): |
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202 '''do conditional write (primarily for plain formatter)''' |
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203 fieldkeys = fields.split() |
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204 assert len(fieldkeys) == len(fielddata) |
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205 self._item.update(zip(fieldkeys, fielddata)) |
16134 | 206 def plain(self, text, **opts): |
207 '''show raw text for non-templated mode''' | |
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208 def isplain(self): |
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209 '''check for plain formatter usage''' |
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210 return False |
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211 def nested(self, field): |
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212 '''sub formatter to store nested data in the specified field''' |
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213 self._item[field] = data = [] |
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214 return _nestedformatter(self._ui, self._converter, data) |
16134 | 215 def end(self): |
216 '''end output for the formatter''' | |
217 if self._item is not None: | |
218 self._showitem() | |
219 | |
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220 def nullformatter(ui, topic): |
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221 '''formatter that prints nothing''' |
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222 return baseformatter(ui, topic, opts={}, converter=_nullconverter) |
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223 |
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224 class _nestedformatter(baseformatter): |
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225 '''build sub items and store them in the parent formatter''' |
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226 def __init__(self, ui, converter, data): |
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227 baseformatter.__init__(self, ui, topic='', opts={}, converter=converter) |
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228 self._data = data |
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229 def _showitem(self): |
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230 self._data.append(self._item) |
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231 |
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232 def _iteritems(data): |
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233 '''iterate key-value pairs in stable order''' |
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234 if isinstance(data, dict): |
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235 return sorted(data.iteritems()) |
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236 return data |
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237 |
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238 class _plainconverter(object): |
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239 '''convert non-primitive data types to text''' |
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240 |
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241 storecontext = False |
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242 |
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243 @staticmethod |
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244 def formatdate(date, fmt): |
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245 '''stringify date tuple in the given format''' |
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246 return util.datestr(date, fmt) |
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247 @staticmethod |
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248 def formatdict(data, key, value, fmt, sep): |
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249 '''stringify key-value pairs separated by sep''' |
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250 return sep.join(fmt % (k, v) for k, v in _iteritems(data)) |
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251 @staticmethod |
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252 def formatlist(data, name, fmt, sep): |
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253 '''stringify iterable separated by sep''' |
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254 return sep.join(fmt % e for e in data) |
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255 |
16134 | 256 class plainformatter(baseformatter): |
257 '''the default text output scheme''' | |
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258 def __init__(self, ui, out, topic, opts): |
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259 baseformatter.__init__(self, ui, topic, opts, _plainconverter) |
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260 if ui.debugflag: |
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261 self.hexfunc = hex |
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262 else: |
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263 self.hexfunc = short |
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264 if ui is out: |
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265 self._write = ui.write |
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266 else: |
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267 self._write = lambda s, **opts: out.write(s) |
16134 | 268 def startitem(self): |
269 pass | |
270 def data(self, **data): | |
271 pass | |
272 def write(self, fields, deftext, *fielddata, **opts): | |
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273 self._write(deftext % fielddata, **opts) |
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274 def condwrite(self, cond, fields, deftext, *fielddata, **opts): |
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275 '''do conditional write''' |
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276 if cond: |
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277 self._write(deftext % fielddata, **opts) |
16134 | 278 def plain(self, text, **opts): |
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279 self._write(text, **opts) |
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280 def isplain(self): |
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281 return True |
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282 def nested(self, field): |
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283 # nested data will be directly written to ui |
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284 return self |
16134 | 285 def end(self): |
286 pass | |
287 | |
288 class debugformatter(baseformatter): | |
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289 def __init__(self, ui, out, topic, opts): |
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290 baseformatter.__init__(self, ui, topic, opts, _nullconverter) |
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291 self._out = out |
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292 self._out.write("%s = [\n" % self._topic) |
16134 | 293 def _showitem(self): |
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294 self._out.write(" " + repr(self._item) + ",\n") |
16134 | 295 def end(self): |
296 baseformatter.end(self) | |
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297 self._out.write("]\n") |
16134 | 298 |
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299 class pickleformatter(baseformatter): |
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300 def __init__(self, ui, out, topic, opts): |
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301 baseformatter.__init__(self, ui, topic, opts, _nullconverter) |
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302 self._out = out |
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303 self._data = [] |
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304 def _showitem(self): |
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305 self._data.append(self._item) |
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306 def end(self): |
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307 baseformatter.end(self) |
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308 self._out.write(pickle.dumps(self._data)) |
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309 |
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310 class jsonformatter(baseformatter): |
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311 def __init__(self, ui, out, topic, opts): |
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312 baseformatter.__init__(self, ui, topic, opts, _nullconverter) |
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313 self._out = out |
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314 self._out.write("[") |
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315 self._first = True |
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316 def _showitem(self): |
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317 if self._first: |
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318 self._first = False |
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319 else: |
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320 self._out.write(",") |
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321 |
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322 self._out.write("\n {\n") |
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323 first = True |
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324 for k, v in sorted(self._item.items()): |
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325 if first: |
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326 first = False |
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327 else: |
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328 self._out.write(",\n") |
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329 u = templatefilters.json(v, paranoid=False) |
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330 self._out.write(' "%s": %s' % (k, u)) |
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331 self._out.write("\n }") |
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332 def end(self): |
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333 baseformatter.end(self) |
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334 self._out.write("\n]\n") |
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335 |
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336 class _templateconverter(object): |
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337 '''convert non-primitive data types to be processed by templater''' |
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338 |
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339 storecontext = True |
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340 |
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341 @staticmethod |
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342 def formatdate(date, fmt): |
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343 '''return date tuple''' |
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344 return date |
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345 @staticmethod |
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346 def formatdict(data, key, value, fmt, sep): |
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347 '''build object that can be evaluated as either plain string or dict''' |
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348 data = util.sortdict(_iteritems(data)) |
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349 def f(): |
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350 yield _plainconverter.formatdict(data, key, value, fmt, sep) |
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351 return templatekw.hybriddict(data, key=key, value=value, fmt=fmt, |
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352 gen=f()) |
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353 @staticmethod |
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354 def formatlist(data, name, fmt, sep): |
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355 '''build object that can be evaluated as either plain string or list''' |
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356 data = list(data) |
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357 def f(): |
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358 yield _plainconverter.formatlist(data, name, fmt, sep) |
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359 return templatekw.hybridlist(data, name=name, fmt=fmt, gen=f()) |
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360 |
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361 class templateformatter(baseformatter): |
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362 def __init__(self, ui, out, topic, opts): |
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363 baseformatter.__init__(self, ui, topic, opts, _templateconverter) |
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364 self._out = out |
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365 spec = lookuptemplate(ui, topic, opts.get('template', '')) |
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366 self._tref = spec.ref |
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367 self._t = loadtemplater(ui, spec, cache=templatekw.defaulttempl) |
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368 self._parts = templatepartsmap(spec, self._t, |
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369 ['docheader', 'docfooter', 'separator']) |
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370 self._counter = itertools.count() |
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371 self._cache = {} # for templatekw/funcs to store reusable data |
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372 self._renderitem('docheader', {}) |
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373 |
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374 def _showitem(self): |
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375 item = self._item.copy() |
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376 item['index'] = index = next(self._counter) |
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377 if index > 0: |
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378 self._renderitem('separator', {}) |
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379 self._renderitem(self._tref, item) |
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380 |
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381 def _renderitem(self, part, item): |
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382 if part not in self._parts: |
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383 return |
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384 ref = self._parts[part] |
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385 |
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386 # TODO: add support for filectx. probably each template keyword or |
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387 # function will have to declare dependent resources. e.g. |
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388 # @templatekeyword(..., requires=('ctx',)) |
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389 props = {} |
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390 if 'ctx' in item: |
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391 props.update(templatekw.keywords) |
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392 # explicitly-defined fields precede templatekw |
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393 props.update(item) |
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394 if 'ctx' in item: |
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395 # but template resources must be always available |
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396 props['templ'] = self._t |
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397 props['repo'] = props['ctx'].repo() |
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398 props['revcache'] = {} |
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399 props = pycompat.strkwargs(props) |
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400 g = self._t(ref, ui=self._ui, cache=self._cache, **props) |
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401 self._out.write(templater.stringify(g)) |
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402 |
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403 def end(self): |
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404 baseformatter.end(self) |
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405 self._renderitem('docfooter', {}) |
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406 |
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407 templatespec = collections.namedtuple(r'templatespec', |
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408 r'ref tmpl mapfile') |
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409 |
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410 def lookuptemplate(ui, topic, tmpl): |
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411 """Find the template matching the given -T/--template spec 'tmpl' |
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412 |
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413 'tmpl' can be any of the following: |
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414 |
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415 - a literal template (e.g. '{rev}') |
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416 - a map-file name or path (e.g. 'changelog') |
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417 - a reference to [templates] in config file |
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418 - a path to raw template file |
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419 |
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420 A map file defines a stand-alone template environment. If a map file |
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421 selected, all templates defined in the file will be loaded, and the |
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422 template matching the given topic will be rendered. No aliases will be |
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423 loaded from user config. |
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424 |
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425 If no map file selected, all templates in [templates] section will be |
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426 available as well as aliases in [templatealias]. |
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427 """ |
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428 |
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429 # looks like a literal template? |
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430 if '{' in tmpl: |
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431 return templatespec('', tmpl, None) |
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432 |
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433 # perhaps a stock style? |
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434 if not os.path.split(tmpl)[0]: |
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435 mapname = (templater.templatepath('map-cmdline.' + tmpl) |
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436 or templater.templatepath(tmpl)) |
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437 if mapname and os.path.isfile(mapname): |
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438 return templatespec(topic, None, mapname) |
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439 |
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440 # perhaps it's a reference to [templates] |
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441 if ui.config('templates', tmpl): |
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442 return templatespec(tmpl, None, None) |
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443 |
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444 if tmpl == 'list': |
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445 ui.write(_("available styles: %s\n") % templater.stylelist()) |
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446 raise error.Abort(_("specify a template")) |
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447 |
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448 # perhaps it's a path to a map or a template |
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449 if ('/' in tmpl or '\\' in tmpl) and os.path.isfile(tmpl): |
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450 # is it a mapfile for a style? |
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451 if os.path.basename(tmpl).startswith("map-"): |
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452 return templatespec(topic, None, os.path.realpath(tmpl)) |
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453 with util.posixfile(tmpl, 'rb') as f: |
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454 tmpl = f.read() |
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455 return templatespec('', tmpl, None) |
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456 |
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457 # constant string? |
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458 return templatespec('', tmpl, None) |
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|
459 |
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460 def templatepartsmap(spec, t, partnames): |
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461 """Create a mapping of {part: ref}""" |
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462 partsmap = {spec.ref: spec.ref} # initial ref must exist in t |
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463 if spec.mapfile: |
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|
464 partsmap.update((p, p) for p in partnames if p in t) |
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465 elif spec.ref: |
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|
466 for part in partnames: |
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467 ref = '%s:%s' % (spec.ref, part) # select config sub-section |
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|
468 if ref in t: |
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|
469 partsmap[part] = ref |
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|
470 return partsmap |
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|
471 |
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|
472 def loadtemplater(ui, spec, cache=None): |
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473 """Create a templater from either a literal template or loading from |
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|
474 a map file""" |
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475 assert not (spec.tmpl and spec.mapfile) |
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476 if spec.mapfile: |
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477 return templater.templater.frommapfile(spec.mapfile, cache=cache) |
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|
478 return maketemplater(ui, spec.tmpl, cache=cache) |
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|
479 |
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|
480 def maketemplater(ui, tmpl, cache=None): |
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|
481 """Create a templater from a string template 'tmpl'""" |
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templater: load and expand aliases by template engine (API) (issue4842)
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|
482 aliases = ui.configitems('templatealias') |
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483 t = templater.templater(cache=cache, aliases=aliases) |
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484 t.cache.update((k, templater.unquotestring(v)) |
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|
485 for k, v in ui.configitems('templates')) |
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486 if tmpl: |
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|
487 t.cache[''] = tmpl |
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488 return t |
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|
489 |
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|
490 def formatter(ui, out, topic, opts): |
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|
491 template = opts.get("template", "") |
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492 if template == "json": |
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493 return jsonformatter(ui, out, topic, opts) |
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494 elif template == "pickle": |
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495 return pickleformatter(ui, out, topic, opts) |
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496 elif template == "debug": |
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497 return debugformatter(ui, out, topic, opts) |
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498 elif template != "": |
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|
499 return templateformatter(ui, out, topic, opts) |
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500 # developer config: ui.formatdebug |
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501 elif ui.configbool('ui', 'formatdebug'): |
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502 return debugformatter(ui, out, topic, opts) |
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503 # deprecated config: ui.formatjson |
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504 elif ui.configbool('ui', 'formatjson'): |
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505 return jsonformatter(ui, out, topic, opts) |
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506 return plainformatter(ui, out, topic, opts) |
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507 |
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508 @contextlib.contextmanager |
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509 def openformatter(ui, filename, topic, opts): |
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510 """Create a formatter that writes outputs to the specified file |
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511 |
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512 Must be invoked using the 'with' statement. |
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513 """ |
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514 with util.posixfile(filename, 'wb') as out: |
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515 with formatter(ui, out, topic, opts) as fm: |
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516 yield fm |
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517 |
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518 @contextlib.contextmanager |
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519 def _neverending(fm): |
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520 yield fm |
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521 |
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522 def maybereopen(fm, filename, opts): |
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523 """Create a formatter backed by file if filename specified, else return |
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524 the given formatter |
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525 |
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526 Must be invoked using the 'with' statement. This will never call fm.end() |
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527 of the given formatter. |
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528 """ |
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529 if filename: |
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530 return openformatter(fm._ui, filename, fm._topic, opts) |
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531 else: |
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532 return _neverending(fm) |