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@condorhero/merge-pdfs

NPM version NPM Downloads GitHub stars LICENSE

Merging PDF (with Outline).

Node.js > 18.5.0.Technical support provided by pypdf.

motive

In the Javascript world, when merging multiple PDFs with outlines, the outline will be automatically lost. Neither pdf-lib nor pdfjs solve this problem, and even the PDFCPU that processes PDFs in the GO language world does not support this feature. The reason is that the outline and page are not within the same object of the PDF specification, making copying the outline more complex. However, this feature can be achieved, such as pypdf in the Python language world.

Installation

npm install -D @condorhero/merge-pdfs

Usage

# The default export file name is merged-pdf.pdf
merge-pdfs 1.pdf 2.pdf

# Customize to Export File Name
merge-pdfs 1.pdf 2.pdf -o custom.pdf

# glob: merge some pdf
merge-pdfs pdf/*.pdf -o merged-pdf.pdf

License

MIT

merge-pdfs's People

Contributors

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Watchers

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merge-pdfs's Issues

use pnpm has a error: cannot find module `.pnpm/[email protected]/node_modules/pyodide/pyodide.asm.js`

But npm is ok:

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/Users/tom/i/vuepress-plugin/packages/vuepress-plugin-export-pdf-v2/example/vuepress-next/file:/Users/tom/i/vuepress-plugin/node_modules/.pnpm/[email protected]/node_modules/pyodide/pyodide.asm.js' imported from /Users/tom/i/vuepress-plugin/node_modules/.pnpm/[email protected]/node_modules/pyodide/pyodide.mjs
    at new NodeError (node:internal/errors:393:5)
    at finalizeResolution (node:internal/modules/esm/resolve:323:11)
    at moduleResolve (node:internal/modules/esm/resolve:916:10)
    at defaultResolve (node:internal/modules/esm/resolve:1124:11)
    at nextResolve (node:internal/modules/esm/loader:163:28)
    at ESMLoader.resolve (node:internal/modules/esm/loader:841:30)
    at ESMLoader.getModuleJob (node:internal/modules/esm/loader:424:18)
    at ESMLoader.import (node:internal/modules/esm/loader:525:22)
    at importModuleDynamically (node:internal/modules/esm/translators:110:35)
    at importModuleDynamicallyCallback (node:internal/process/esm_loader:35:14) {
  code: 'ERR_MODULE_NOT_FOUND'
}

Occasional errors occur 

PythonError: Traceback (most recent call last):
  File "/lib/python3.11/site-packages/micropip/_micropip.py", line 48, in _get_pypi_json
    metadata = await fetch_string(url, fetch_kwargs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/lib/python3.11/site-packages/micropip/_compat_in_pyodide.py", line 34, in fetch_string
    return await (await pyfetch(url, **kwargs)).string()
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/lib/python311.zip/pyodide/http.py", line 254, in pyfetch
    raise OSError(e.message) from None
OSError: fetch failed

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/lib/python3.11/site-packages/micropip/_micropip.py", line 576, in install
    await transaction.gather_requirements(requirements)
  File "/lib/python3.11/site-packages/micropip/_micropip.py", line 342, in gather_requirements
    await gather(*requirement_promises)
  File "/lib/python3.11/site-packages/micropip/_micropip.py", line 349, in add_requirement
    return await self.add_requirement_inner(Requirement(req))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/lib/python3.11/site-packages/micropip/_micropip.py", line 441, in add_requirement_inner
    metadata = await _get_pypi_json(req.name, self.fetch_kwargs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/lib/python3.11/site-packages/micropip/_micropip.py", line 50, in _get_pypi_json
    raise ValueError(
ValueError: Can't fetch metadata for 'pypdf' from PyPI. Please make sure you have entered a correct package name.

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