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Push — master ( da9a19...ff1544 )

by Vitaly

created 2017-12-29 07:18 UTC

stacktracey.js (3 issues)

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"use strict";

/*  ------------------------------------------------------------------------ */

const O            = Object,

      isBrowser    = (typeof window !== 'undefined') && (window.window === window) && window.navigator,
      lastOf       = x => x[x.length - 1],
      getSource    = require ('get-source'),
      partition    = require ('./impl/partition'),
      asTable      = require ('as-table'),
      nixSlashes   = x => x.replace (/\\/g, '/'),
      pathRoot     = isBrowser ? window.location.href : (nixSlashes (process.cwd ()) + '/')

/*  ------------------------------------------------------------------------ */

class StackTracey extends Array {

    constructor (input, offset) {
        
        const originalInput          = input
            , isParseableSyntaxError = input && (input instanceof SyntaxError && !isBrowser)
        
        super ()

    /*  Fixes for Safari    */

        this.constructor = StackTracey
        this.__proto__   = StackTracey.prototype

    /*  new StackTracey ()            */

        if (!input) {
             input = new Error ()
             offset = (offset === undefined) ? 1 : offset
        }

    /*  new StackTracey (Error)      */

        if (input instanceof Error) {
            input = input[StackTracey.stack] || input.stack || ''
        }

    /*  new StackTracey (string)     */

        if (typeof input === 'string') {
            input = StackTracey.rawParse (input).slice (offset).map (StackTracey.extractEntryMetadata)
        }

    /*  new StackTracey (array)      */

        if (Array.isArray (input)) {

            if (isParseableSyntaxError) {
                
                const rawLines = module.require ('util').inspect (originalInput).split ('\n')
                    , fileLine = rawLines[0].match (/^([^:]+):(.+)/)

                if (fileLine) {
                    input.unshift ({
                        file: nixSlashes (fileLine[1]),
                        line: fileLine[2],
                        column: (rawLines[2] || '').indexOf ('^') + 1,
                        sourceLine: rawLines[1],
                        callee: '(syntax error)',
                        syntaxError: true
                    })
                }
            }

            this.length = input.length
            input.forEach ((x, i) => this[i] = x)
        }
    }

    static extractEntryMetadata (e) {
        
        const fileRelative = StackTracey.relativePath (e.file || '')

        return O.assign (e, {

            calleeShort:  e.calleeShort || lastOf ((e.callee || '').split ('.')),
            fileRelative: fileRelative,
            fileShort:    StackTracey.shortenPath (fileRelative),
            fileName:     lastOf ((e.file || '').split ('/')),
            thirdParty:   StackTracey.isThirdParty (fileRelative) && !e.index
        })
    }

    static shortenPath (relativePath) {
        return relativePath.replace (/^node_modules\//, '')
                           .replace (/^webpack\/bootstrap\//, '')
    }

    static relativePath (fullPath) {
        return fullPath.replace (pathRoot, '')
                       .replace (/^.*\:\/\/?\/?/, '')
    }

    static isThirdParty (relativePath) {
        return (relativePath[0] === '~')                          || // webpack-specific heuristic
               (relativePath[0] === '/')                          || // external source
               (relativePath.indexOf ('node_modules')      === 0) ||
               (relativePath.indexOf ('webpack/bootstrap') === 0)
    }

    static rawParse (str) {

        const lines = (str || '').split ('\n')

        const entries = lines.map (line => { line = line.trim ()

            var callee, fileLineColumn = [], native, planA, planB


            if ((planA = line.match (/at (.+) \((.+)\)/)) ||
                (planA = line.match (/(.*)@(.*)/))) {

                callee         =  planA[1]
                native         = (planA[2] === 'native')
                fileLineColumn = (planA[2].match (/(.*):(.+):(.+)/) || []).slice (1) }

            else if ((planB = line.match (/^(at\s+)*(.+):([0-9]+):([0-9]+)/) )) {
                fileLineColumn = (planB).slice (2) }

            else {
                return undefined }

        /*  Detect things like Array.reduce
            TODO: detect more built-in types            */
            
            if (callee && !fileLineColumn[0]) {
                const type = callee.split ('.')[0]
                if (type === 'Array') {
                    native = true
                }
            }

            return {
                beforeParse: line,
                callee:      callee || '',
                index:       isBrowser && (fileLineColumn[0] === window.location.href),
                native:      native || false,
                file:        nixSlashes (fileLineColumn[0] || ''),
                line:        parseInt (fileLineColumn[1] || '', 10) || undefined,
                column:      parseInt (fileLineColumn[2] || '', 10) || undefined } })

        return entries.filter (x => (x !== undefined))
    }

    withSource (i) {
        return this[i] && StackTracey.withSource (this[i])
    }

    static withSource (loc) {

        if (loc.sourceFile || (loc.file && loc.file.indexOf ('<') >= 0)) { // skip things like <anonymous> and stuff that was already fetched
            return loc
            
        } else {

            let resolved = getSource (loc.file || '').resolve (loc)
            
            if (!resolved.sourceFile.error) {
                resolved.file = nixSlashes (resolved.sourceFile.path)
                resolved = StackTracey.extractEntryMetadata (resolved)
            }

            if (!resolved.sourceLine.error && resolved.sourceLine.includes ('// @hide')) {
                resolved.sourceLine         = resolved.sourceLine.replace  ('// @hide', '')
                resolved.hide               = true
            }

            return O.assign ({ sourceLine: '' }, loc, resolved)
        }
    }

    get withSources () {
        return new StackTracey (this.map (StackTracey.withSource))
    }

    get mergeRepeatedLines () {
        return new StackTracey (
            partition (this, e => e.file + e.line).map (
                group => {
                    return group.items.slice (1).reduce ((memo, entry) => {
                        memo.callee      = (memo.callee      || '<anonymous>') + ' → ' + (entry.callee      || '<anonymous>')
                        memo.calleeShort = (memo.calleeShort || '<anonymous>') + ' → ' + (entry.calleeShort || '<anonymous>')
                        return memo }, O.assign ({}, group.items[0])) }))
    }

    get clean () {
        return this.withSources.mergeRepeatedLines.filter ((e, i) => (i === 0) || !(e.thirdParty || e.hide || e.native))
    }

    at (i) {
        return O.assign ({

            beforeParse: '',
            callee:      '<???>',
            index:       false,
            native:      false,
            file:        '<???>',
            line:        0,
            column:      0

        }, this[i])
    }

    static locationsEqual (a, b) {
        return (a.file   === b.file) &&
               (a.line   === b.line) &&
               (a.column === b.column)
    }

    get pretty () {

        const trimEnd   = (s, n) => s && ((s.length > n) ? (s.slice (0, n-1) + '…') : s)   
        const trimStart = (s, n) => s && ((s.length > n) ? ('…' + s.slice (-(n-1))) : s)

        return asTable (this.withSources.map (
                            e => [
                                ('at ' + trimEnd (e.calleeShort, 30)),
                                trimStart ((e.fileShort && (e.fileShort + ':' + e.line)) || '', 40),
                                trimEnd (((e.sourceLine || '').trim () || ''), 80)
                            ]))
    }

    static resetCache () {

        getSource.resetCache ()
    }
}

/*  Chaining helper for .isThirdParty
    ------------------------------------------------------------------------ */

(() => {

    const methods = {

        include (pred) {

            const f = StackTracey.isThirdParty
            O.assign (StackTracey.isThirdParty = (path => f (path) ||  pred (path)), methods)
        },

        except (pred) {

            const f = StackTracey.isThirdParty
            O.assign (StackTracey.isThirdParty = (path => f (path) && !pred (path)), methods)
        },
    }

    O.assign (StackTracey.isThirdParty, methods)

}) ()

/*  Array methods
    ------------------------------------------------------------------------ */

;['map', 'filter', 'slice', 'concat', 'reverse'].forEach (name => {

    StackTracey.prototype[name] = function (/*...args */) { // no support for ...args in Node v4 :(
        
        const arr = Array.from (this)
        return new StackTracey (arr[name].apply (arr, arguments))
    }
})

/*  A private field that an Error instance can expose
    ------------------------------------------------------------------------ */

StackTracey.stack = /* istanbul ignore next */ (typeof Symbol !== 'undefined') ? Symbol.for ('StackTracey') : '__StackTracey'


/*  ------------------------------------------------------------------------ */

module.exports = StackTracey

/*  ------------------------------------------------------------------------ */



1			"use strict";
2
3			/* ------------------------------------------------------------------------ */
4
5			const O = Object,
			0 ignored issues – show Comprehensibility Best Practice introduced 2017-07-23 10:17 UTC by Report Bug Copy Issue Report Show Similar Issues like this You seem to be aliasing the built-in name `Object` as `O`. This makes your code very difficult to follow, consider using the built-in name directly. Loading history...
6			isBrowser = (typeof window !== 'undefined') && (window.window === window) && window.navigator,
7			lastOf = x => x[x.length - 1],
8			getSource = require ('get-source'),
9			partition = require ('./impl/partition'),
10			asTable = require ('as-table'),
11			nixSlashes = x => x.replace (/\\/g, '/'),
12			pathRoot = isBrowser ? window.location.href : (nixSlashes (process.cwd ()) + '/')
13
14			/* ------------------------------------------------------------------------ */
15
16			class StackTracey extends Array {
17
18			constructor (input, offset) {
19
20			const originalInput = input
21			, isParseableSyntaxError = input && (input instanceof SyntaxError && !isBrowser)
22
23			super ()
24
25			/* Fixes for Safari */
26
27			this.constructor = StackTracey
28			this.__proto__ = StackTracey.prototype
29
30			/* new StackTracey () */
31
32			if (!input) {
33			input = new Error ()
34			offset = (offset === undefined) ? 1 : offset
35			}
36
37			/* new StackTracey (Error) */
38
39			if (input instanceof Error) {
40			input = input[StackTracey.stack] \|\| input.stack \|\| ''
41			}
42
43			/* new StackTracey (string) */
44
45			if (typeof input === 'string') {
46			input = StackTracey.rawParse (input).slice (offset).map (StackTracey.extractEntryMetadata)
47			}
48
49			/* new StackTracey (array) */
50
51			if (Array.isArray (input)) {
52
53			if (isParseableSyntaxError) {
54
55			const rawLines = module.require ('util').inspect (originalInput).split ('\n')
56			, fileLine = rawLines[0].match (/^([^:]+):(.+)/)
57
58			if (fileLine) {
59			input.unshift ({
60			file: nixSlashes (fileLine[1]),
61			line: fileLine[2],
62			column: (rawLines[2] \|\| '').indexOf ('^') + 1,
63			sourceLine: rawLines[1],
64			callee: '(syntax error)',
65			syntaxError: true
66			})
67			}
68			}
69
70			this.length = input.length
71			input.forEach ((x, i) => this[i] = x)
72			}
73			}
74
75			static extractEntryMetadata (e) {
76
77			const fileRelative = StackTracey.relativePath (e.file \|\| '')
78
79			return O.assign (e, {
80
81			calleeShort: e.calleeShort \|\| lastOf ((e.callee \|\| '').split ('.')),
82			fileRelative: fileRelative,
83			fileShort: StackTracey.shortenPath (fileRelative),
84			fileName: lastOf ((e.file \|\| '').split ('/')),
85			thirdParty: StackTracey.isThirdParty (fileRelative) && !e.index
86			})
87			}
88
89			static shortenPath (relativePath) {
90			return relativePath.replace (/^node_modules\//, '')
91			.replace (/^webpack\/bootstrap\//, '')
92			}
93
94			static relativePath (fullPath) {
95			return fullPath.replace (pathRoot, '')
96			.replace (/^.*\:\/\/?\/?/, '')
97			}
98
99			static isThirdParty (relativePath) {
100			return (relativePath[0] === '~') \|\| // webpack-specific heuristic
101			(relativePath[0] === '/') \|\| // external source
102			(relativePath.indexOf ('node_modules') === 0) \|\|
103			(relativePath.indexOf ('webpack/bootstrap') === 0)
104			}
105
106			static rawParse (str) {
107
108			const lines = (str \|\| '').split ('\n')
109
110			const entries = lines.map (line => { line = line.trim ()
111
112			var callee, fileLineColumn = [], native, planA, planB
			0 ignored issues – show Unused Code introduced 2017-07-23 10:17 UTC by Report Bug Copy Issue Report Show Similar Issues like this The assignment to variable `fileLineColumn` seems to be never used. Consider removing it. Loading history...
113
114			if ((planA = line.match (/at (.+) \((.+)\)/)) \|\|
115			(planA = line.match (/(.)@(.)/))) {
116
117			callee = planA[1]
118			native = (planA[2] === 'native')
119			fileLineColumn = (planA[2].match (/(.*):(.+):(.+)/) \|\| []).slice (1) }
120
121			else if ((planB = line.match (/^(at\s+)*(.+):([0-9]+):([0-9]+)/) )) {
122			fileLineColumn = (planB).slice (2) }
123
124			else {
125			return undefined }
126
127			/* Detect things like Array.reduce
128			TODO: detect more built-in types */
129
130			if (callee && !fileLineColumn[0]) {
131			const type = callee.split ('.')[0]
132			if (type === 'Array') {
133			native = true
134			}
135			}
136
137			return {
138			beforeParse: line,
139			callee: callee \|\| '',
140			index: isBrowser && (fileLineColumn[0] === window.location.href),
141			native: native \|\| false,
142			file: nixSlashes (fileLineColumn[0] \|\| ''),
143			line: parseInt (fileLineColumn[1] \|\| '', 10) \|\| undefined,
144			column: parseInt (fileLineColumn[2] \|\| '', 10) \|\| undefined } })
145
146			return entries.filter (x => (x !== undefined))
147			}
148
149			withSource (i) {
150			return this[i] && StackTracey.withSource (this[i])
151			}
152
153			static withSource (loc) {
154
155			if (loc.sourceFile \|\| (loc.file && loc.file.indexOf ('<') >= 0)) { // skip things like <anonymous> and stuff that was already fetched
156			return loc
157
158			} else {
159
160			let resolved = getSource (loc.file \|\| '').resolve (loc)
161
162			if (!resolved.sourceFile.error) {
163			resolved.file = nixSlashes (resolved.sourceFile.path)
164			resolved = StackTracey.extractEntryMetadata (resolved)
165			}
166
167			if (!resolved.sourceLine.error && resolved.sourceLine.includes ('// @hide')) {
168			resolved.sourceLine = resolved.sourceLine.replace ('// @hide', '')
169			resolved.hide = true
170			}
171
172			return O.assign ({ sourceLine: '' }, loc, resolved)
173			}
174			}
175
176			get withSources () {
177			return new StackTracey (this.map (StackTracey.withSource))
178			}
179
180			get mergeRepeatedLines () {
181			return new StackTracey (
182			partition (this, e => e.file + e.line).map (
183			group => {
184			return group.items.slice (1).reduce ((memo, entry) => {
185			memo.callee = (memo.callee \|\| '<anonymous>') + ' → ' + (entry.callee \|\| '<anonymous>')
186			memo.calleeShort = (memo.calleeShort \|\| '<anonymous>') + ' → ' + (entry.calleeShort \|\| '<anonymous>')
187			return memo }, O.assign ({}, group.items[0])) }))
188			}
189
190			get clean () {
191			return this.withSources.mergeRepeatedLines.filter ((e, i) => (i === 0) \|\| !(e.thirdParty \|\| e.hide \|\| e.native))
192			}
193
194			at (i) {
195			return O.assign ({
196
197			beforeParse: '',
198			callee: '<???>',
199			index: false,
200			native: false,
201			file: '<???>',
202			line: 0,
203			column: 0
204
205			}, this[i])
206			}
207
208			static locationsEqual (a, b) {
209			return (a.file === b.file) &&
210			(a.line === b.line) &&
211			(a.column === b.column)
212			}
213
214			get pretty () {
215
216			const trimEnd = (s, n) => s && ((s.length > n) ? (s.slice (0, n-1) + '…') : s)
217			const trimStart = (s, n) => s && ((s.length > n) ? ('…' + s.slice (-(n-1))) : s)
218
219			return asTable (this.withSources.map (
220			e => [
221			('at ' + trimEnd (e.calleeShort, 30)),
222			trimStart ((e.fileShort && (e.fileShort + ':' + e.line)) \|\| '', 40),
223			trimEnd (((e.sourceLine \|\| '').trim () \|\| ''), 80)
224			]))
225			}
226
227			static resetCache () {
228
229			getSource.resetCache ()
230			}
231			}
232
233			/* Chaining helper for .isThirdParty
234			------------------------------------------------------------------------ */
235
236			(() => {
237
238			const methods = {
239
240			include (pred) {
241
242			const f = StackTracey.isThirdParty
243			O.assign (StackTracey.isThirdParty = (path => f (path) \|\| pred (path)), methods)
244			},
245
246			except (pred) {
247
248			const f = StackTracey.isThirdParty
249			O.assign (StackTracey.isThirdParty = (path => f (path) && !pred (path)), methods)
250			},
251			}
252
253			O.assign (StackTracey.isThirdParty, methods)
254
255			}) ()
256
257			/* Array methods
258			------------------------------------------------------------------------ */
259
260			;['map', 'filter', 'slice', 'concat', 'reverse'].forEach (name => {
261
262			StackTracey.prototype[name] = function (/...args /) { // no support for ...args in Node v4 :(
263
264			const arr = Array.from (this)
265			return new StackTracey (arr[name].apply (arr, arguments))
266			}
267			})
268
269			/* A private field that an Error instance can expose
270			------------------------------------------------------------------------ */
271
272			StackTracey.stack = /* istanbul ignore next */ (typeof Symbol !== 'undefined') ? Symbol.for ('StackTracey') : '__StackTracey'
			0 ignored issues – show Bug introduced 2017-10-19 10:12 UTC by Report Bug Copy Issue Report Show Similar Issues like this The variable `Symbol` seems to be never declared. If this is a global, consider adding a `/** global: Symbol */` comment. This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed. To learn more about declaring variables in Javascript, see the MDN. Loading history...
273
274			/* ------------------------------------------------------------------------ */
275
276			module.exports = StackTracey
277
278			/* ------------------------------------------------------------------------ */
279
280

xpl / stacktracey

Push — master ( da9a19...ff1544 )

stacktracey.js (3 issues)

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