-
Notifications
You must be signed in to change notification settings - Fork 29.7k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
repl: add repl.setupHistory for programmatic repl
Adds a `repl.setupHistory()` instance method so that programmatic REPLs can also write history to a file. This change also refactors all of the history file management to `lib/internal/repl/history.js`, cleaning up and simplifying `lib/internal/repl.js`. PR-URL: #25895 Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
- Loading branch information
Showing
6 changed files
with
422 additions
and
158 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| 'use strict'; | ||
|
|
||
| const { Interface } = require('readline'); | ||
| const path = require('path'); | ||
| const fs = require('fs'); | ||
| const os = require('os'); | ||
| const util = require('util'); | ||
| const debug = util.debuglog('repl'); | ||
|
|
||
| // XXX(chrisdickinson): The 15ms debounce value is somewhat arbitrary. | ||
| // The debounce is to guard against code pasted into the REPL. | ||
| const kDebounceHistoryMS = 15; | ||
|
|
||
| module.exports = setupHistory; | ||
|
|
||
| function _writeToOutput(repl, message) { | ||
| repl._writeToOutput(message); | ||
| repl._refreshLine(); | ||
| } | ||
|
|
||
| function setupHistory(repl, historyPath, ready) { | ||
| // Empty string disables persistent history | ||
| if (typeof historyPath === 'string') | ||
| historyPath = historyPath.trim(); | ||
|
|
||
| if (historyPath === '') { | ||
| repl._historyPrev = _replHistoryMessage; | ||
| return ready(null, repl); | ||
| } | ||
|
|
||
| if (!historyPath) { | ||
| try { | ||
| historyPath = path.join(os.homedir(), '.node_repl_history'); | ||
| } catch (err) { | ||
| _writeToOutput(repl, '\nError: Could not get the home directory.\n' + | ||
| 'REPL session history will not be persisted.\n'); | ||
|
|
||
| debug(err.stack); | ||
| repl._historyPrev = _replHistoryMessage; | ||
| return ready(null, repl); | ||
| } | ||
| } | ||
|
|
||
| var timer = null; | ||
| var writing = false; | ||
| var pending = false; | ||
| repl.pause(); | ||
| // History files are conventionally not readable by others: | ||
| // https://github.com/nodejs/node/issues/3392 | ||
| // https://github.com/nodejs/node/pull/3394 | ||
| fs.open(historyPath, 'a+', 0o0600, oninit); | ||
|
|
||
| function oninit(err, hnd) { | ||
| if (err) { | ||
| // Cannot open history file. | ||
| // Don't crash, just don't persist history. | ||
| _writeToOutput(repl, '\nError: Could not open history file.\n' + | ||
| 'REPL session history will not be persisted.\n'); | ||
| debug(err.stack); | ||
|
|
||
| repl._historyPrev = _replHistoryMessage; | ||
| repl.resume(); | ||
| return ready(null, repl); | ||
| } | ||
| fs.close(hnd, onclose); | ||
| } | ||
|
|
||
| function onclose(err) { | ||
| if (err) { | ||
| return ready(err); | ||
| } | ||
| fs.readFile(historyPath, 'utf8', onread); | ||
| } | ||
|
|
||
| function onread(err, data) { | ||
| if (err) { | ||
| return ready(err); | ||
| } | ||
|
|
||
| if (data) { | ||
| repl.history = data.split(/[\n\r]+/, repl.historySize); | ||
| } else { | ||
| repl.history = []; | ||
| } | ||
|
|
||
| fs.open(historyPath, 'r+', onhandle); | ||
| } | ||
|
|
||
| function onhandle(err, hnd) { | ||
| if (err) { | ||
| return ready(err); | ||
| } | ||
| fs.ftruncate(hnd, 0, (err) => { | ||
| repl._historyHandle = hnd; | ||
| repl.on('line', online); | ||
|
|
||
| // Reading the file data out erases it | ||
| repl.once('flushHistory', function() { | ||
| repl.resume(); | ||
| ready(null, repl); | ||
| }); | ||
| flushHistory(); | ||
| }); | ||
| } | ||
|
|
||
| // ------ history listeners ------ | ||
| function online(line) { | ||
| repl._flushing = true; | ||
|
|
||
| if (timer) { | ||
| clearTimeout(timer); | ||
| } | ||
|
|
||
| timer = setTimeout(flushHistory, kDebounceHistoryMS); | ||
| } | ||
|
|
||
| function flushHistory() { | ||
| timer = null; | ||
| if (writing) { | ||
| pending = true; | ||
| return; | ||
| } | ||
| writing = true; | ||
| const historyData = repl.history.join(os.EOL); | ||
| fs.write(repl._historyHandle, historyData, 0, 'utf8', onwritten); | ||
| } | ||
|
|
||
| function onwritten(err, data) { | ||
| writing = false; | ||
| if (pending) { | ||
| pending = false; | ||
| online(); | ||
| } else { | ||
| repl._flushing = Boolean(timer); | ||
| if (!repl._flushing) { | ||
| repl.emit('flushHistory'); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function _replHistoryMessage() { | ||
| if (this.history.length === 0) { | ||
| _writeToOutput( | ||
| this, | ||
| '\nPersistent history support disabled. ' + | ||
| 'Set the NODE_REPL_HISTORY environment\nvariable to ' + | ||
| 'a valid, user-writable path to enable.\n' | ||
| ); | ||
| } | ||
| this._historyPrev = Interface.prototype._historyPrev; | ||
| return this._historyPrev(); | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.