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Trying to add libxslt to Docker Container – Debian

I’ve getting started with Docker, using the LAMP repo from GitHub as my starting point. I need to add the libxslt lib. I’ve tried adding this to my Dockerfile:

RUN apt-get install libxslt-dev
RUN docker-php-ext-enable libxslt-dev

But keep getting error: E: Unable to locate package libxslt-dev

I’ve tried to search for the lib from the Docker container’s command line apt-cache search libxslt but get no results.

Can anybody point me in the right direction to get this lib installed?

Thanks

Followed answer below (@vpalmerini) updating Dockerfile:

RUN apt update && apt-get install -y libxslt-dev
RUN docker-php-ext-enable libxslt-dev

Which I thought was working:

Step 9/13 : RUN apt update && apt-get install -y libxslt-dev
[…] 
The following additional packages will be installed:
libxslt1.1
The following NEW packages will be installed:
libxslt1-dev libxslt1.1
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 756 kB of archives.
After this operation, 3001 kB of additional disk space will be used.
Get:1 http://deb.debian.org/debian buster/main amd64 libxslt1.1 amd64 1.1.32-2.2~deb10u1 [237 kB]
Get:2 http://deb.debian.org/debian buster/main amd64 libxslt1-dev amd64 1.1.32-2.2~deb10u1 [519 kB]
Fetched 756 kB in 0s (4903 kB/s)
Selecting previously unselected package libxslt1.1:amd64.
(Reading database ... 21271 files and directories currently installed.)
Preparing to unpack .../libxslt1.1_1.1.32-2.2~deb10u1_amd64.deb ...
Unpacking libxslt1.1:amd64 (1.1.32-2.2~deb10u1) ...
Selecting previously unselected package libxslt1-dev:amd64.
Preparing to unpack .../libxslt1-dev_1.1.32-2.2~deb10u1_amd64.deb ...
Unpacking libxslt1-dev:amd64 (1.1.32-2.2~deb10u1) ...
Setting up libxslt1.1:amd64 (1.1.32-2.2~deb10u1) ...
Setting up libxslt1-dev:amd64 (1.1.32-2.2~deb10u1) ...
Processing triggers for libc-bin (2.28-10) ...
Removing intermediate container b62504aca3f9
 ---> b62b7af34467
Step 10/13 : RUN docker-php-ext-enable libxslt-dev
 ---> Running in 181191c74fe5
error: 'libxslt-dev' does not exist

Also tried changing RUN command to match package found: libxslt1-dev

RUN docker-php-ext-enable libxslt1-dev

Still unable to enable libxslt

Further info, output from:

dpkg --get-selections

includes:

libxml2-dev:amd64               install
libxrender-dev:amd64            install
libxrender1:amd64               install
libxslt1-dev:amd64              install
libxslt1.1:amd64                install
libxt-dev:amd64                 install

But running RUN docker-php-ext-enable libxslt1-dev still gives

error: 'libxslt1-dev' does not exist
Tags:

2

Answers


  1. 0

    The only thing missing is that you have to update the packages of your image, then you will be able to install libxslt-dev package:

    RUN apt update && apt-get install -y libxslt-dev
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  2. 0

    You are confusing the php extension called xsl with the system development package for libxslt (present on your base image Debian Linux distribution with the specific name libxslt1-dev) which is required to install that php extension.

    Here is a basic Dockerfile to achieve your requirement. Note that, as a good practice, I made the install in a single run instruction with some extra cleanup at the end.

    The apt-get remove line is optional but will reduce the layer size a bit more. Installing libxslt1-dev and all its dependencies (icu-devtools, libicu-dev, libicu63, libxml2, libxml2-dev, libxslt1.1) is mandatory for installing the extension. But once it is done, the dev packages can be removed.

    FROM php:7.4.2-apache-buster

RUN apt-get update && 
    apt-get install -y libxslt1-dev && 
    docker-php-ext-install xsl && 
    apt-get remove -y libxslt1-dev icu-devtools libicu-dev libxml2-dev && 
    rm -rf /var/lib/apt/lists/*
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