在 heroku 上安装 pdftotext 库

Question

pdftotext 库是 requirements.txt 的要求。尝试推送到 heroku 时，出现以下错误：

remote:          Running setup.py install for pdftotext: started
remote:            Running setup.py install for pdftotext: finished with status 'error'
remote:            Complete output from command /app/.heroku/python/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-rnbekz45/pdftotext/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-o0if2tl3-record/install-record.txt --single-version-externally-managed --compile:
remote:            /app/.heroku/python/lib/python3.6/distutils/dist.py:261: UserWarning: Unknown distribution option: 'long_description_content_type'
remote:              warnings.warn(msg)
remote:            running install
remote:            running build
remote:            running build_ext
remote:            building 'pdftotext' extension
remote:            creating build
remote:            creating build/temp.linux-x86_64-3.6
remote:            gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -DPOPPLER_CPP_AT_LEAST_0_30_0=0 -I/app/.heroku/python/include/python3.6m -c pdftotext.cpp -o build/temp.linux-x86_64-3.6/pdftotext.o -Wall
remote:            pdftotext.cpp:3:10: fatal error: poppler/cpp/poppler-document.h: No such file or directory
remote:             #include <poppler/cpp/poppler-document.h>
remote:                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
remote:            compilation terminated.
remote:            error: command 'gcc' failed with exit status 1
remote:            
remote:            ----------------------------------------
remote:        Command "/app/.heroku/python/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-rnbekz45/pdftotext/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-o0if2tl3-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-rnbekz45/pdftotext/
remote:  !     Push rejected, failed to compile Python app.
remote: 
remote:  !     Push failed

通常我会通过安装 libpoppler-cpp-dev 和 apt 来解决这个问题。但是在 heroku 上，我没有 root 访问权限来执行此操作。有解决办法吗？

我意识到严格来说，这不是一个编程问题。但是我需要这个来部署我的程序，所以我希望这里的纯粹主义者能原谅我。

Answer 1

来自How do I install additional software packages that my application requires?：

We don't offer official support for installing extra packages but there are a couple of unsupported options.

One is the experimental heroku-apt-buildpack. You can use this by including any APT package in an Aptfile in your application. The buildpack will then install these packages on the dyno when you deploy your application.

因此，为此，首先添加构建包：

heroku buildpacks:add --index 1 heroku-community/apt

然后，在您的源目录中创建一个 Aptfile，内容如下：

libpoppler-cpp-dev

并像往常一样部署。让我知道是否有帮助！

在 heroku 上安装 pdftotext 库

Installing pdftotext library on heroku

python

heroku

pdftotext