Errors after reducing layers of a docker images - docker

Question

I am getting multiple errors when I reduce layer in the following image file.
configure: error: in /root/xdebug': configure: error: no acceptable C compiler found in $PATH See config.log' for more details
Following Original file is not giving me any errors. it's only when I make the changes to the file. I think it has something to do with permissions and the way I'm adding steps.
FROM amazonlinux
ARG DOCKER_TYPE
ENV DOCKER_TYPE=$DOCKER_TYPE
ARG UID
RUN yum update -y
RUN yum install sudo -y
RUN sudo yum install git -y
RUN sudo amazon-linux-extras install php7.2 -y
RUN sudo yum install php-mbstring -y
RUN sudo yum install php-openssl -y
RUN sudo yum install php-pdo_mysql -y
RUN sudo yum install php-simplexml -y
RUN sudo yum install php-soap -y
RUN sudo yum install php-spl -y
RUN sudo yum install php-xsl -y
RUN sudo yum install php-zip -y
RUN sudo yum install php-libxml -y
RUN sudo yum install php-intl -y
RUN sudo yum install php-iconv -y
RUN sudo yum install php-hash -y
RUN sudo yum install php-gd -y
RUN sudo yum install php-dom -y
RUN sudo yum install php-curl -y
RUN sudo yum install php-ctype -y
RUN sudo yum install php-bcmath -y
RUN sudo yum install php-devel -y
RUN sudo yum groupinstall "Development tools" -y
# Xdebug
RUN cd /root/; git clone https://github.com/xdebug/xdebug.git; cd /root/xdebug/; ./rebuild.sh
Updated version
FROM amazonlinux
ARG DOCKER_TYPE
ENV DOCKER_TYPE=$DOCKER_TYPE
ARG UID
RUN yum update -y
RUN yum install sudo -y && sudo yum install -y \
git \
amazon-linux-extras install php7.2 \
php-mbstring \
php-openssl \
php-pdo_mysql \
php-simplexml \
php-soap \
php-spl \
php-xsl \
php-zip \
php-libxml \
php-intl \
php-iconv \
php-hash \
php-gd \
php-dom \
php-curl \
php-ctype \
php-bcmath \
php-devel \
groupinstall "Development tools"
# Xdebug
RUN cd /root/; git clone https://github.com/xdebug/xdebug.git; cd /root/xdebug/; ./rebuild.sh

Answer 1

You're replacing the line
RUN sudo amazon-linux-extras install php7.2
with an argument to yum install.
That's apparently something different.
You can probably fix it by adding && after git and starting a new sudo yum install for the following packages.
Indentation which clearly shows where a new command is started and where you just add more arguments to a command would help readability a lot.

Answer 2

Your updated dockerfile should look something like this:
FROM amazonlinux
ARG DOCKER_TYPE
ENV DOCKER_TYPE=$DOCKER_TYPE
ARG UID
RUN yum update -y && \
yum install sudo -y && \
sudo yum install git -y && \
sudo amazon-linux-extras install php7.2 -y && \
sudo yum install php-mbstring -y && \
sudo yum install php-openssl -y && \
sudo yum install php-pdo_mysql -y && \
sudo yum install php-simplexml -y && \
sudo yum install php-soap -y && \
sudo yum install php-spl -y && \
sudo yum install php-xsl -y && \
sudo yum install php-zip -y && \
sudo yum install php-libxml -y && \
sudo yum install php-intl -y && \
sudo yum install php-iconv -y && \
sudo yum install php-hash -y && \
sudo yum install php-gd -y && \
sudo yum install php-dom -y && \
sudo yum install php-curl -y && \
sudo yum install php-ctype -y && \
sudo yum install php-bcmath -y && \
sudo yum install php-devel -y && \
sudo yum groupinstall "Development tools" -y && \
sudo yum clean all
# Xdebug
RUN cd /root/; git clone https://github.com/xdebug/xdebug.git; cd /root/xdebug/; ./rebuild.sh
To change multiple "RUN" instructions you need to run them with && between them. The "\" character marks that the instruction continues in the next line.
I've also added
yum clean all
at the end of this single RUN instruction to keep your image layers smaller.