Support file syscall which are used by mkvmerge command.

[milad2golnia]

This issue is originated from this discussion

Based on the error, it might be that mkvmerge is calling a file syscall we don't support yet. You can open another issue for that and we that's more feasible then the original issue.

Currently we can not debug programs which contains mkvmerge command because it seems mirrord doesn't support some of its underlying file syscalls.

More information

This is just a reminder from mentioned issue.

Target code:

 async merge(
    framerate: number,
    sourcePath: string,
    destinationPath: string,
  ): Promise<string> {
    // Two following lines, convert relative path to absolute path:
    sourcePath = sourcePath.replace(/^\.\//, '/app/')
    destinationPath = destinationPath.replace(/^\.\//, '/app/')

    if (framerate <= 0) throw new Error(`Received ${framerate} as framerate.`)
    this.logger.verbose(
      `Merging matroska multimedia with: mkvmerge --default-duration 0:${framerate}fps ${sourcePath} -o ${destinationPath}`,
    )

    return new Promise((resolve, reject) => {
      const child = spawn('mkvmerge', [
        '--default-duration',
        `0:${framerate}fps`,
        sourcePath,
        '-o',
        destinationPath,
      ])

      child.stderr.on('data', (chunk) => {
        this.logger.warn(chunk)
      })
      child.on('error', (err) => {
        this.logger.error(
          `Merging matroska failed: ${err.name} | ${err.message}`,
          err.stack,
        )
        reject(err)
      })
      child.on('close', (code, signal) => {
        if (code !== 0) {
          this.logger.error(
            `Merging matroska video faild with code ${code} and signal ${signal}`,
          )
          reject(code)
        } else {
          return resolve(destinationPath)
        }
      })
    })
  }

Here is output of debugging with mirrord:

VERBOSE [Matroska] Merging matroska multimedia with: mkvmerge --default-duration 0:25fps /app/media/da86527f-c75f-4e52-a98a-59186cbe0ba4/add17fb6-b571-434b-aaf8-7f1d45cc830f-1730724272420/recording-merged.webm -o /app/media/da86527f-c75f-4e52-a98a-59186cbe0ba4/add17fb6-b571-434b-aaf8-7f1d45cc830f-1730724272420/add17fb6-b571-434b-aaf8-7f1d45cc830f-fixed-framerate.webm
[Nest] 36046  - 11/04/2024, 9:41:24 PM    WARN [Matroska] terminate called after throwing an instance of 'boost::filesystem::filesystem_error'
  what():  boost::filesystem::status: Function not implemented [system:38]: "/app/media/da86527f-c75f-4e52-a98a-59186cbe0ba4/add17fb6-b571-434b-aaf8-7f1d45cc830f-1730724272420"

[linear]

MBE-511 Support file syscall which are used by mkvmerge command.

[aviramha]

Thanks for the elaborate report!