Mercurial > hg > mercurial-talk
annotate revset-talk.tex @ 298:6420e2bdb651
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| author | Martin Geisler <mg@aragost.com> |
|---|---|
| date | Tue, 07 Jun 2011 17:37:10 +0200 |
| parents | 03a869b83c70 |
| children | 027862d2fec9 |
| rev | line source |
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| 294 | 1 \documentclass[t,noamsthm,xcolor=dvipsnames]{beamer} |
| 2 \input{preambel} | |
| 296 | 3 \title{Mercurial's Query Languages} |
| 294 | 4 \author{Martin Geisler |
| 5 \texorpdfstring{\\$\langle$\texttt{mg@aragost.com}$\rangle$} | |
| 6 {<mg@aragost.com>}} | |
| 7 \date{gearconf 2011} | |
| 8 | |
| 9 \begin{document} | |
| 10 | |
| 11 \begin{frame}[plain] | |
| 12 \maketitle | |
| 13 \begin{tikzpicture}[overlay, remember picture] | |
| 14 \node[above right] at (current page.south west) | |
| 15 {\includegraphics[height=3cm]{pixelman-front}}; | |
| 16 \end{tikzpicture} | |
| 17 \end{frame} | |
| 18 | |
| 19 \begin{frame}{Outline} | |
| 20 \tableofcontents | |
| 21 \end{frame} | |
| 22 | |
| 23 \section{Introduction} | |
| 24 | |
| 296 | 25 \section{Revision Sets} |
| 26 | |
| 27 \subsection{Predicates} | |
| 294 | 28 |
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29 \begin{frame}[fragile]{Predicates} |
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30 Predicates select changesets for inclusion in the resulting set: |
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31 \begin{itemize} |
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32 \item Changeset metadata: \cmd{closed()}, \cmd{head()}, |
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33 \cmd{merge()}, \cmd{author(string)}, \cmd{date(interval)}, |
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34 |
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35 Closed heads: |
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36 \begin{lstlisting} |
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37 $ hg log -r "head() and closed()" |
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38 \end{lstlisting} |
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39 |
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40 Reopened branches: |
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41 \begin{lstlisting} |
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42 $ hg log -r "closed() and not head()" |
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43 \end{lstlisting} |
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44 |
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45 \begin{lstlisting} |
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46 $ hg log -r "author('Martin') and merge()" |
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47 \end{lstlisting} |
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48 |
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49 \end{itemize} |
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50 |
| 294 | 51 bisected(string) |
| 52 grep(regex) | |
| 53 keyword(string) | |
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54 |
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55 \cmd{adds(pattern)} |
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56 \cmd{contains(pattern)} |
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57 \cmd{file(pattern)} |
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58 \cmd{filelog(pattern)} |
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59 \cmd{modifies(pattern)} |
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60 \cmd{removes(pattern)} |
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61 |
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62 |
| 294 | 63 \end{frame} |
| 64 | |
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65 |
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66 |
| 294 | 67 \begin{frame}{Functions} |
| 68 ancestor(single, single) | |
| 69 ancestors(set) | |
| 70 children(set) | |
| 71 descendants(set) | |
| 72 follow([file]) | |
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73 |
| 294 | 74 heads(set) |
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75 |
| 294 | 76 outgoing([path]) |
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77 |
| 294 | 78 p1([set]) |
| 79 p2([set]) | |
| 80 parents([set]) | |
| 81 present(set) | |
| 82 roots(set) | |
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83 \end{frame} |
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84 |
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85 \begin{frame}{Final Touches on Your Query} |
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86 Trimming, cutting, manipulating the set: |
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87 \begin{itemize}[<+->] |
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88 \item \cmd{max(set)}, \cmd{min(set)}: the changeset with |
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89 minimum/maximum revision number in the set |
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90 \item \cmd{reverse(set)}: the set is an ordered set; this reverses |
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91 it |
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92 \item \cmd{limit(set, n)}, \cmd{last(set, n)}: the first/last |
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93 $n$ changesets |
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94 \item \cmd{sort(set[, [-]key...])}: sorting the set by revision |
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95 number, branch name, changeset message, user name, or date |
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96 \end{itemize} |
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97 \end{frame} |
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98 |
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99 \begin{frame}[fragile]{Solving Ambiguities} |
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100 When you do \cmd{hg log -r "foo"}, Mercurial checks |
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101 \begin{enumerate} |
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102 %\item revision number |
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103 %\item full changeset ID |
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104 \item is \cmd{foo} a bookmark? |
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105 \item is \cmd{foo} a tag? |
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106 \item is \cmd{foo} a branch name? |
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107 %\item partial changeset ID |
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108 \end{enumerate} |
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109 First match wins. |
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110 |
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111 You can override this using predicates: |
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112 \begin{itemize}[<+->] |
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113 %\item \cmd{rev(number)} |
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114 %\item \cmd{id(hash)} |
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115 \item \cmd{bookmark([name])}, \cmd{tag([name])}: the changeset with |
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116 the given bookmark or tag, or all bookmarked/tagged changesets |
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117 \item \cmd{branch(name)}: changesets on the given branch |
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118 \item \cmd{branch(set)}: changesets on the branches of the given set, |
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119 normally used with a single changeset: |
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120 \begin{lstlisting} |
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121 $ hg log -r "branch(tip)" |
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122 \end{lstlisting} |
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123 \end{itemize} |
| 294 | 124 \end{frame} |
| 125 | |
| 296 | 126 \subsection{Operators} |
| 294 | 127 |
| 128 \begin{frame}{Operators} | |
| 129 | |
| 130 \end{frame} | |
| 131 | |
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132 \begin{frame}[fragile]{Examples} |
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133 \begin{itemize} |
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134 \item Changes that need to be merged into the default branch: |
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135 \begin{lstlisting} |
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136 $ hg log -r "ancestors(stable) - ancestors(default)" |
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137 $ hg log -r "::stable - ::default" |
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138 \end{lstlisting} |
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139 |
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140 \item Heads on the current branch: |
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141 \begin{lstlisting} |
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142 $ hg log -r "head() and branch(.)" |
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143 \end{lstlisting} |
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144 |
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145 \item Open heads on the current branch: |
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146 \begin{lstlisting} |
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147 $ hg log -r "head() and branch(.) and not closed()" |
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148 \end{lstlisting} |
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149 |
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150 \item Bugfixes that are not in a tagged release: |
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151 \begin{lstlisting} |
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152 $ hg log -r "keyword(bug) and not ::tagged()" |
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153 \end{lstlisting} |
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154 |
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155 |
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156 \end{itemize} |
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157 \end{frame} |
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158 |
| 294 | 159 |
| 296 | 160 \section{File Sets} |
| 161 | |
| 162 \begin{frame}{Selecting Files} | |
| 163 \begin{itemize} | |
| 164 \item select files from working copy | |
| 165 \item select files from old revisions | |
| 166 \item might be part of Mercurial 1.9 (July) or 2.0 (November) | |
| 167 \end{itemize} | |
| 168 \end{frame} | |
| 169 | |
| 170 \begin{frame} | |
| 171 File sets give an amazing flexibility. | |
| 172 \end{frame} | |
| 173 | |
| 174 \begin{frame}[fragile]{Working Copy Status} | |
| 175 The \cmd{hg status} command lets you select files: | |
| 176 \begin{lstlisting} | |
| 177 $ hg status | |
| 178 M index.html | |
| 179 A logo.png | |
| 180 $ hg status --added | |
| 181 A logo.png | |
| 182 \end{lstlisting} | |
| 183 | |
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184 How do you see the change to \path{index.html} without seeing the diff |
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185 of the added \path{logo.png} file? You do: |
| 296 | 186 \begin{lstlisting} |
| 187 $ hg diff $(hg status --no-status --modified) | |
| 188 \end{lstlisting} | |
| 189 | |
| 190 With file sets you can do | |
| 191 \begin{lstlisting} | |
| 192 $ hg diff "set:modified()" | |
| 193 \end{lstlisting} | |
| 194 and it will work on all platforms. | |
| 195 | |
| 196 \end{frame} | |
| 197 | |
| 198 \begin{frame}[fragile]{Working Copy Status} | |
| 199 The proposed predicates are: | |
| 200 \begin{itemize}[<+->] | |
| 201 | |
| 202 \item status flags: \cmd{modified()}, \cmd{added()}, \cmd{removed()}, | |
| 203 \cmd{deleted()}, \cmd{unknown()}, \cmd{ignored()}, \cmd{clean()} | |
| 204 | |
| 205 \item copied files: \cmd{copied()} | |
| 206 | |
| 207 \item tracked files that \emph{would} be ignored: \cmd{ignorable()} | |
| 208 | |
| 209 \item all tracked files: | |
| 210 \cmd{tracked()} | |
| 211 | |
| 212 \item after a merge: \cmd{conflicted()} and \cmd{not conflicted()} | |
| 213 | |
| 214 \end{itemize} | |
| 215 \end{frame} | |
| 216 | |
| 217 \begin{frame}[fragile] | |
| 218 We can replace the \cmd{find} Unix command: | |
| 219 \begin{itemize} | |
| 220 \item \cmd{glob(P)} instead of \cmd{find -path P} | |
| 221 \item \cmd{regex(P)} instead of \cmd{find -regex P} | |
| 222 \end{itemize} | |
| 223 Remember that this also works on old revisions: | |
| 224 \begin{lstlisting} | |
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225 $ hg status -r 1.0::2.0 "set:glob(src/*.h)" |
| 296 | 226 A src/foo.h |
| 227 M src/bar.h | |
| 228 \end{lstlisting} | |
| 229 This shows that \path{foo.h} is a new header file in version 2.0. | |
| 230 \end{frame} | |
| 231 | |
| 232 \begin{frame} | |
| 233 Other \cmd{find}-like predicates will be: | |
| 234 \begin{itemize} | |
| 235 \item file type: \cmd{executable()}, \cmd{symlink()}, | |
| 236 \item permissions: \cmd{perm()}, \cmd{owner()} | |
| 237 \item other: \cmd{date()}, \cmd{size()} | |
| 238 \end{itemize} | |
| 239 \end{frame} | |
| 240 | |
| 241 \begin{frame} | |
| 242 Matching files by content: | |
| 243 \begin{itemize} | |
| 244 \item \cmd{grep()}: like the Unix \cmd{grep} we all love | |
| 245 \item \cmd{contains()}: simple sub-string matching | |
| 246 \item \cmd{binary()}, \cmd{text()} | |
| 247 \item \cmd{decodes()}: check if file can be decoded with the given | |
| 248 character set, such as UTF-8, UTF-16, \dots | |
| 249 \item \cmd{eol()}: line-ending type, Unix (\cmd{LF}) or DOS (\cmd{CRLF}) | |
| 250 \end{itemize} | |
| 251 \end{frame} | |
| 252 | |
| 253 | |
| 254 | |
| 255 \begin{frame}[fragile]{Working Copy Predicates} | |
| 256 \begin{lstlisting} | |
| 257 $ hg status | |
| 258 ? logo.png | |
| 259 ? index.html | |
| 260 $ hg status "set:unknown() and not binary()" | |
| 261 ? index.html | |
| 262 \end{lstlisting} | |
| 263 \end{frame} | |
| 264 | |
| 265 | |
| 266 \begin{frame}[fragile]{Working Copy Predicates} | |
| 267 \begin{lstlisting} | |
| 268 $ hg status -c 100 "set:decodes('UTF-8')" | |
| 269 M plan.txt | |
| 270 \end{lstlisting} | |
| 271 \end{frame} | |
| 272 | |
| 273 \begin{frame} | |
| 274 Future extensions: | |
| 275 \begin{itemize} | |
| 276 \item \cmd{magic()}: recognize files based on file content, like the | |
| 277 \cmd{file} program in Unix | |
| 278 \item \cmd{locked()}: files locked for exclusive access by my | |
| 279 \ext{lock} extension | |
| 280 \end{itemize} | |
| 281 \end{frame} | |
| 282 | |
| 295 | 283 \begin{frame}[fragile]{Implementation} |
| 284 When a revision set is evaluated it is: | |
| 285 \begin{description}[<+->] | |
| 286 \item[tokenized:] split input into operators, symbols, strings | |
| 287 \item[parsed:] build parse tree based on operator precedence | |
| 288 \item[optimized:] reorders parse tree to evaluate cheap parts first: | |
| 289 \begin{lstlisting} | |
| 290 contains("README") and 1.0::1.5 | |
| 291 \end{lstlisting} | |
| 292 starts with a manifest-based query --- reorder to: | |
| 293 \begin{lstlisting} | |
| 294 1.0::1.5 and contains("README") | |
| 295 \end{lstlisting} | |
| 296 \item[executed:] go through tree and evaluate predicates | |
| 297 \end{description} | |
| 298 \end{frame} | |
| 299 | |
| 300 | |
| 294 | 301 \appendix |
| 302 \newcounter{finalframe} | |
| 303 \setcounter{finalframe}{\value{framenumber}} | |
| 304 | |
| 305 \setcounter{framenumber}{\value{finalframe}} | |
| 306 | |
| 307 \end{document} | |
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308 |
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309 % LocalWords: changeset changesets |