Mercurial > hg
view mercurial/templates/paper/map @ 47123:d8ac62374943
dirstate-tree: Make `DirstateMap` borrow from a bytes buffer
… that has the contents of the `.hg/dirstate` file.
This only applies to the tree-based flavor of `DirstateMap`.
For now only the entire `&[u8]` slice is stored, so this is not useful yet.
Adding a lifetime parameter to the `DirstateMap` struct (in hg-core) makes
Python bindings non-trivial because we keep that struct in a Python object
that has a dynamic lifetime tied to Python’s reference-counting and GC.
As long as we keep the `PyBytes` that owns the borrowed bytes buffer next to
the borrowing struct, the buffer will live long enough for the borrows to stay
valid. However this relationship cannot be expressed in safe Rust code in a
way that would statisfy they borrow-checker. We use `unsafe` code to erase
that lifetime parameter, and encapsulate it in a safe abstraction similar to
the owning-ref crate: https://docs.rs/owning_ref/
Differential Revision: https://phab.mercurial-scm.org/D10557
author | Simon Sapin <simon.sapin@octobus.net> |
---|---|
date | Fri, 30 Apr 2021 18:24:54 +0200 |
parents | c2e3bc99fba4 |
children |
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href="{url|urlescape}diff/{node|short}/{file|urlescape}{sessionvars%urlparameter}">{file|escape}</a> ' filenodelink = '<a href="{url|urlescape}file/{node|short}/{file|urlescape}{sessionvars%urlparameter}">{file|escape}</a> ' filenolink = '{file|escape} ' fileellipses = '...' diffstatlink = diffstat.tmpl diffstatnolink = diffstat.tmpl changelogentry = shortlogentry.tmpl changeset = changeset.tmpl manifest = manifest.tmpl nav = '{before%naventry} {after%naventry}' navshort = '{before%navshortentry}{after%navshortentry}' navgraph = '{before%navgraphentry}{after%navgraphentry}' filenav = '{before%filenaventry}{after%filenaventry}' updirentry = ' <tr class="fileline"> <td class="name"> <a href="{url|urlescape}file/{symrev}{up|urlescape}{sessionvars%urlparameter}">[up]</a> </td> <td class="size"></td> <td class="permissions">drwxr-xr-x</td> </tr>' direntry = ' <tr class="fileline"> <td class="name"> <a href="{url|urlescape}file/{symrev}{path|urlescape}{sessionvars%urlparameter}"> <img src="{staticurl|urlescape}coal-folder.png" alt="dir."/> {basename|escape}/ </a> <a href="{url|urlescape}file/{symrev}{path|urlescape}/{emptydirs|urlescape}{sessionvars%urlparameter}"> {emptydirs|escape} </a> </td> <td class="size"></td> <td class="permissions">drwxr-xr-x</td> </tr>' fileentry = ' <tr class="fileline"> <td class="filename"> <a href="{url|urlescape}file/{symrev}/{file|urlescape}{sessionvars%urlparameter}"> <img src="{staticurl|urlescape}coal-file.png" alt="file"/> {basename|escape} </a> </td> <td class="size">{size}</td> <td class="permissions">{permissions|permissions}</td> </tr>' filerevision = filerevision.tmpl fileannotate = fileannotate.tmpl filediff = filediff.tmpl filecomparison = filecomparison.tmpl filelog = filelog.tmpl fileline = ' <span id="{lineid}">{strip(line|escape, '\r\n')}</span><a href="#{lineid}"></a>' filelogentry = filelogentry.tmpl annotateline = ' <tr id="{lineid}"{ifeq(node, originalnode, ' class="thisrev"')}> <td class="annotate parity{blockparity}"> {if(blockhead, '<a href="{url|urlescape}annotate/{node|short}/{file|urlescape}{sessionvars%urlparameter}#l{targetline}"> {rev} </a>')} <div class="annotate-info"> <div> <a href="{url|urlescape}annotate/{node|short}/{file|urlescape}{sessionvars%urlparameter}#l{targetline}"> {node|short}</a> {desc|escape|firstline} </div> <div><em>{author|obfuscate}</em></div> <div>parents: {parents%annotateparent}</div> <a href="{url|urlescape}diff/{node|short}/{file|urlescape}{sessionvars%urlparameter}">diff</a> <a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#{lineid}">{linenumber}</a> {line|escape}</td> </tr>' annotateparent = ' <a href="{url|urlescape}annotate/{node|short}/{file|urlescape}{sessionvars%urlparameter}">{rev}</a>' diffblock = '<div class="bottomline inc-lineno"><pre class="sourcelines wrap">{lines}</pre></div>' difflineplus = ' <span id="{lineid}" class="plusline">{strip(line|escape, '\r\n')}</span><a href="#{lineid}"></a>' difflineminus = ' <span id="{lineid}" class="minusline">{strip(line|escape, '\r\n')}</span><a href="#{lineid}"></a>' difflineat = ' <span id="{lineid}" class="atline">{strip(line|escape, '\r\n')}</span><a href="#{lineid}"></a>' diffline = ' <span id="{lineid}">{strip(line|escape, '\r\n')}</span><a href="#{lineid}"></a>' comparisonblock =' <tbody class="block"> {lines} </tbody>' comparisonline = ' <tr id="{lineid}"> <td class="source {type}"><a href="#{lineid}">{leftlinenumber}</a> {leftline|escape}</td> <td class="source {type}"><a href="#{lineid}">{rightlinenumber}</a> {rightline|escape}</td> </tr>' changesetparent = '<a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">{node|short}</a> ' changesetparentdiff = ' {changesetparent} {ifeq(node, basenode, '(current diff)', '({difffrom})')}' difffrom = '<a href="{url|urlescape}rev/{node|short}:{originalnode|short}{sessionvars%urlparameter}">diff</a>' filerevparent = '<a href="{url|urlescape}file/{node|short}/{file|urlescape}{sessionvars%urlparameter}">{rename%filerename}{node|short}</a> ' filerevchild = '<a href="{url|urlescape}file/{node|short}/{file|urlescape}{sessionvars%urlparameter}">{node|short}</a> ' filerename = '{file|escape}@' filelogrename = ' <span class="base"> base <a href="{url|urlescape}file/{node|short}/{file|urlescape}{sessionvars%urlparameter}"> {file|escape}@{node|short} </a> </span>' fileannotateparent = ' <tr> <td class="metatag">parent:</td> <td> <a href="{url|urlescape}annotate/{node|short}/{file|urlescape}{sessionvars%urlparameter}"> {rename%filerename}{node|short} </a> </td> </tr>' changesetchild = ' <a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">{node|short}</a>' fileannotatechild = ' <tr> <td class="metatag">child:</td> <td> <a href="{url|urlescape}annotate/{node|short}/{file|urlescape}{sessionvars%urlparameter}"> {node|short} </a> </td> </tr>' tags = tags.tmpl tagentry = ' <tr class="tagEntry"> <td> <a href="{url|urlescape}rev/{tag|revescape}{sessionvars%urlparameter}"> {tag|escape} </a> </td> <td class="node"> <a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}"> {node|short} </a> </td> </tr>' bookmarks = bookmarks.tmpl bookmarkentry = ' <tr class="tagEntry"> <td> <a href="{url|urlescape}rev/{bookmark|revescape}{sessionvars%urlparameter}"> {bookmark|escape} </a> </td> <td class="node"> <a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}"> {node|short} </a> </td> </tr>' branches = branches.tmpl branchentry = ' <tr class="tagEntry"> <td> <a href="{url|urlescape}shortlog/{branch|revescape}{sessionvars%urlparameter}" class="{status}"> {branch|escape} </a> </td> <td class="node"> <a href="{url|urlescape}shortlog/{node|short}{sessionvars%urlparameter}" class="{status}"> {node|short} </a> </td> </tr>' phasetag = '{ifeq(phase, 'public', '', '<span class="phase">{phase|escape}</span> ')}' obsoletetag = '{if(obsolete, '<span class="obsolete">obsolete</span> ')}' instabilitytag = '<span class="instability">{instability|escape}</span> ' changelogtag = '<span class="tag">{name|escape}</span> ' changesettag = '<span class="tag">{tag|escape}</span> ' changesetbookmark = '<span class="tag">{bookmark|escape}</span> ' changelogbranchhead = '<span class="branchhead">{name|escape}</span> ' changelogbranchname = '<span class="branchname">{name|escape}</span> ' alltags = '{phasetag}{obsoletetag}{instabilities%instabilitytag}{inbranch%changelogbranchname}{branches%changelogbranchhead}{tags%changelogtag}{bookmarks%changelogtag}' successorlink = '<a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">{node|short}</a> ' obsfatesuccessors = '{if(successors, ' as ')}{successors%successorlink}' obsfateverb = '{obsfateverb(successors, markers)}' obsfateoperations = '{if(obsfateoperations(markers), ' using {join(obsfateoperations(markers), ', ')}')}' obsfateusers = '{if(obsfateusers(markers), ' by {join(obsfateusers(markers)%'{user|obfuscate}', ', ')}')}' obsfatedate = '{if(obsfatedate(markers), ' {ifeq(min(obsfatedate(markers)), max(obsfatedate(markers)), '<span class="age">{min(obsfatedate(markers))|rfc822date}</span>', 'between <span class="age">{min(obsfatedate(markers))|rfc822date}</span> and <span class="age">{max(obsfatedate(markers))|rfc822date}</span>')}')}' obsfateentry = '{obsfateverb}{obsfateoperations}{obsfatesuccessors}{obsfateusers}{obsfatedate}' instabilitychangesetlink = '<a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">{node|short}</a>' divergentnode = '{instabilitychangesetlink} ({phase})' whyunstableentry = '{instability}: {if(divergentnodes, divergentnodes%divergentnode)} {reason} {instabilitychangesetlink}' filediffparent = ' <tr> <th class="parent">parent {rev}:</th> <td class="parent"><a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">{node|short}</a></td> </tr>' filediffchild = ' <tr> <th class="child">child {rev}:</th> <td class="child"><a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">{node|short}</a> </td> </tr>' indexentry = ' <tr> <td><a href="{url|urlescape}{sessionvars%urlparameter}">{name|escape}</a></td> <td>{description}</td> <td>{contact|obfuscate}</td> <td class="age">{lastchange|rfc822date}</td> <td class="indexlinks">{archives%indexarchiveentry}</td> <td> {if(isdirectory, '', '<a href="{url|urlescape}atom-log" title="subscribe to repository atom feed"> <img class="atom-logo" src="{staticurl|urlescape}feed-icon-14x14.png" alt="subscribe to repository atom feed"> </a>' )} </td> </tr>\n' indexarchiveentry = '<a href="{url|urlescape}archive/{node|short}{extension|urlescape}"> ↓{type|escape}</a>' index = index.tmpl archiveentry = ' <li> <a href="{url|urlescape}archive/{symrev}{extension|urlescape}{ifeq(path,'/','',path|urlescape)}">{type|escape}</a> </li>' notfound = notfound.tmpl error = error.tmpl urlparameter = '{separator}{name}={value|urlescape}' hiddenformentry = '<input type="hidden" name="{name}" value="{value|escape}" />' breadcrumb = '> <a href="{url|urlescape}">{name|escape}</a> ' searchform = ' <form class="search" action="{url|urlescape}log"> {sessionvars%hiddenformentry} <p><input name="rev" id="search1" type="text" size="30" value="{query|escape}" /></p> <div id="hint">{searchhint}</div> </form>' searchhint = 'Find changesets by keywords (author, files, the commit message), revision number or hash, or <a href="{url|urlescape}help/revsets">revset expression</a>.' diffoptsform = ' <form id="diffopts-form" data-ignorews="{if(get(diffopts, 'ignorews'), '1', '0')}" data-ignorewsamount="{if(get(diffopts, 'ignorewsamount'), '1', '0')}" data-ignorewseol="{if(get(diffopts, 'ignorewseol'), '1', '0')}" data-ignoreblanklines="{if(get(diffopts, 'ignoreblanklines'), '1', '0')}"> <span>Ignore whitespace changes - </span> <span>Everywhere:</span> <input id="ignorews-checkbox" type="checkbox" /> <span>Within whitespace:</span> <input id="ignorewsamount-checkbox" type="checkbox" /> <span>At end of lines:</span> <input id="ignorewseol-checkbox" type="checkbox" /> </form>'