Created
August 13, 2022 12:51
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Get deno.json that was used in this run by deno
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| export const getDenoJson = async () => { | |
| const parseMaps = (maps: string) => { | |
| const data = []; | |
| for (const line of maps.split("\n")) { | |
| if (!line) { | |
| continue; | |
| } | |
| const [adddrRange, flags, , , , name] = line.split(/ +/); | |
| data.push({ | |
| name: name !== "" ? name : undefined, | |
| startAddr: parseInt(adddrRange.split("-")[0], 16), | |
| endAddr: parseInt(adddrRange.split("-")[1], 16), | |
| flags: { | |
| r: flags.includes("r"), | |
| w: flags.includes("w"), | |
| }, | |
| }); | |
| } | |
| return data; | |
| }; | |
| const maps = Deno.readTextFileSync("/proc/self/maps"); | |
| const mem = Deno.openSync("/proc/self/mem"); | |
| const heap = parseMaps(maps).find((d) => d.name == "[heap]"); | |
| Deno.seekSync(mem.rid, heap!.startAddr, Deno.SeekMode.Start); | |
| class Finder extends WritableStream<string> { | |
| sink: Sink; | |
| constructor(start: string, end: string) { | |
| const sink = new Sink(start, end); | |
| super(sink); | |
| this.sink = sink; | |
| } | |
| } | |
| /// use global variable because the class is destroyed when an exception is rose | |
| let target: string | undefined; | |
| class Sink implements UnderlyingSink<string> { | |
| constructor(public startS: string, public endS: string) { | |
| } | |
| write(chunk: string) { | |
| if (!target && chunk.includes(this.endS)) { | |
| const startIndex = chunk.indexOf(this.startS); | |
| const endIndex = startIndex + | |
| chunk.slice(startIndex).indexOf(this.endS) + | |
| this.endS.length; | |
| const result = chunk.slice(startIndex, endIndex); | |
| if (result) { | |
| target = result; | |
| } | |
| } | |
| } | |
| } | |
| const finder = new Finder("file:///", "deno.json"); | |
| const stringMem = mem.readable.pipeThrough(new TextDecoderStream()).pipeTo( | |
| finder, | |
| ); | |
| try { | |
| await stringMem; | |
| } catch { /*ignore*/ } | |
| return target; | |
| }; |
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