Improve grep syntax

Dockerfile

@@ -176,8 +176,8 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
     echo "error_log /dev/stderr;" >> /etc/nginx/nginx.conf && \
     # PipeWire and WirePlumber
     mkdir -pm755 /etc/apt/trusted.gpg.d && curl -fsSL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0xFC43B7352BCC0EC8AF2EEB8B25088A0359807596" | gpg --dearmor -o /etc/apt/trusted.gpg.d/pipewire-debian-ubuntu-pipewire-upstream.gpg && \
-    mkdir -pm755 /etc/apt/sources.list.d && echo "deb https://ppa.launchpadcontent.net/pipewire-debian/pipewire-upstream/ubuntu $(grep UBUNTU_CODENAME= /etc/os-release | cut -d= -f2 | tr -d '\"') main" > "/etc/apt/sources.list.d/pipewire-debian-ubuntu-pipewire-upstream-$(grep UBUNTU_CODENAME= /etc/os-release | cut -d= -f2 | tr -d '\"').list" && \
-    mkdir -pm755 /etc/apt/sources.list.d && echo "deb https://ppa.launchpadcontent.net/pipewire-debian/wireplumber-upstream/ubuntu $(grep UBUNTU_CODENAME= /etc/os-release | cut -d= -f2 | tr -d '\"') main" > "/etc/apt/sources.list.d/pipewire-debian-ubuntu-wireplumber-upstream-$(grep UBUNTU_CODENAME= /etc/os-release | cut -d= -f2 | tr -d '\"').list" && \
+    mkdir -pm755 /etc/apt/sources.list.d && echo "deb https://ppa.launchpadcontent.net/pipewire-debian/pipewire-upstream/ubuntu $(grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2 | tr -d '\"') main" > "/etc/apt/sources.list.d/pipewire-debian-ubuntu-pipewire-upstream-$(grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2 | tr -d '\"').list" && \
+    mkdir -pm755 /etc/apt/sources.list.d && echo "deb https://ppa.launchpadcontent.net/pipewire-debian/wireplumber-upstream/ubuntu $(grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2 | tr -d '\"') main" > "/etc/apt/sources.list.d/pipewire-debian-ubuntu-wireplumber-upstream-$(grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2 | tr -d '\"').list" && \
     apt-get update && apt-get install --no-install-recommends -y \
         pipewire \
         pipewire-alsa \
@@ -231,7 +231,7 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
         libglu1:i386 \
         libsm6:i386; fi && \
     # Install nvidia-vaapi-driver, requires the kernel parameter `nvidia_drm.modeset=1` set to run correctly
-    if [ "$(grep VERSION_ID= /etc/os-release | cut -d= -f2 | tr -d '\"')" \> "20.04" ]; then \
+    if [ "$(grep '^VERSION_ID=' /etc/os-release | cut -d= -f2 | tr -d '\"')" \> "20.04" ]; then \
     apt-get update && apt-get install --no-install-recommends -y \
         meson \
         gstreamer1.0-plugins-bad \
@@ -301,7 +301,7 @@ RUN mkdir -pm755 /etc/apt/preferences.d && echo "Package: firefox*\n\
 Pin: version 1:1snap*\n\
 Pin-Priority: -1" > /etc/apt/preferences.d/firefox-nosnap && \
     mkdir -pm755 /etc/apt/trusted.gpg.d && curl -fsSL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x738BEB9321D1AAEC13EA9391AEBDF4819BE21867" | gpg --dearmor -o /etc/apt/trusted.gpg.d/mozillateam-ubuntu-ppa.gpg && \
-    mkdir -pm755 /etc/apt/sources.list.d && echo "deb https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu $(grep UBUNTU_CODENAME= /etc/os-release | cut -d= -f2 | tr -d '\"') main" > "/etc/apt/sources.list.d/mozillateam-ubuntu-ppa-$(grep UBUNTU_CODENAME= /etc/os-release | cut -d= -f2 | tr -d '\"').list" && \
+    mkdir -pm755 /etc/apt/sources.list.d && echo "deb https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu $(grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2 | tr -d '\"') main" > "/etc/apt/sources.list.d/mozillateam-ubuntu-ppa-$(grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2 | tr -d '\"').list" && \
     apt-get update && apt-get install --no-install-recommends -y \
         kde-baseapps \
         plasma-desktop \
@@ -480,7 +480,7 @@ ENV XMODIFIERS="@im=fcitx"
 ARG WINE_BRANCH=staging
 RUN if [ "$(dpkg --print-architecture)" = "amd64" ]; then \
     mkdir -pm755 /etc/apt/keyrings && curl -fsSL -o /etc/apt/keyrings/winehq-archive.key "https://dl.winehq.org/wine-builds/winehq.key" && \
-    curl -fsSL -o "/etc/apt/sources.list.d/winehq-$(grep UBUNTU_CODENAME= /etc/os-release | cut -d= -f2 | tr -d '\"').sources" "https://dl.winehq.org/wine-builds/ubuntu/dists/$(grep UBUNTU_CODENAME= /etc/os-release | cut -d= -f2 | tr -d '\"')/winehq-$(grep UBUNTU_CODENAME= /etc/os-release | cut -d= -f2 | tr -d '\"').sources" && \
+    curl -fsSL -o "/etc/apt/sources.list.d/winehq-$(grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2 | tr -d '\"').sources" "https://dl.winehq.org/wine-builds/ubuntu/dists/$(grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2 | tr -d '\"')/winehq-$(grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2 | tr -d '\"').sources" && \
     apt-get update && apt-get install --install-recommends -y \
         winehq-${WINE_BRANCH} && \
     apt-get install --no-install-recommends -y \
@@ -542,18 +542,18 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
         libxv1 \
         libxtst6 \
         libxext6 && \
-    if [ "$(grep VERSION_ID= /etc/os-release | cut -d= -f2 | tr -d '\"')" \> "20.04" ]; then apt-get install --no-install-recommends -y xcvt libopenh264-dev svt-av1 aom-tools; else apt-get install --no-install-recommends -y mesa-utils-extra; fi && \
+    if [ "$(grep '^VERSION_ID=' /etc/os-release | cut -d= -f2 | tr -d '\"')" \> "20.04" ]; then apt-get install --no-install-recommends -y xcvt libopenh264-dev svt-av1 aom-tools; else apt-get install --no-install-recommends -y mesa-utils-extra; fi && \
     # Automatically fetch the latest Selkies-GStreamer version and install the components
     SELKIES_VERSION="$(curl -fsSL "https://api.github.com/repos/selkies-project/selkies-gstreamer/releases/latest" | jq -r '.tag_name' | sed 's/[^0-9\.\-]*//g')" && \
-    cd /opt && curl -fsSL "https://github.com/selkies-project/selkies-gstreamer/releases/download/v${SELKIES_VERSION}/gstreamer-selkies_gpl_v${SELKIES_VERSION}_ubuntu$(grep VERSION_ID= /etc/os-release | cut -d= -f2 | tr -d '\"')_$(dpkg --print-architecture).tar.gz" | tar -xzf - && \
+    cd /opt && curl -fsSL "https://github.com/selkies-project/selkies-gstreamer/releases/download/v${SELKIES_VERSION}/gstreamer-selkies_gpl_v${SELKIES_VERSION}_ubuntu$(grep '^VERSION_ID=' /etc/os-release | cut -d= -f2 | tr -d '\"')_$(dpkg --print-architecture).tar.gz" | tar -xzf - && \
     cd /tmp && curl -O -fsSL "https://github.com/selkies-project/selkies-gstreamer/releases/download/v${SELKIES_VERSION}/selkies_gstreamer-${SELKIES_VERSION}-py3-none-any.whl" && pip3 install --no-cache-dir --force-reinstall "selkies_gstreamer-${SELKIES_VERSION}-py3-none-any.whl" && rm -f "selkies_gstreamer-${SELKIES_VERSION}-py3-none-any.whl" && \
     cd /opt && curl -fsSL "https://github.com/selkies-project/selkies-gstreamer/releases/download/v${SELKIES_VERSION}/selkies-gstreamer-web_v${SELKIES_VERSION}.tar.gz" | tar -xzf - && \
-    cd /tmp && curl -o selkies-js-interposer.deb -fsSL "https://github.com/selkies-project/selkies-gstreamer/releases/download/v${SELKIES_VERSION}/selkies-js-interposer_v${SELKIES_VERSION}_ubuntu$(grep VERSION_ID= /etc/os-release | cut -d= -f2 | tr -d '\"')_$(dpkg --print-architecture).deb" && apt-get update && apt-get install --no-install-recommends -y ./selkies-js-interposer.deb && rm -f selkies-js-interposer.deb && \
+    cd /tmp && curl -o selkies-js-interposer.deb -fsSL "https://github.com/selkies-project/selkies-gstreamer/releases/download/v${SELKIES_VERSION}/selkies-js-interposer_v${SELKIES_VERSION}_ubuntu$(grep '^VERSION_ID=' /etc/os-release | cut -d= -f2 | tr -d '\"')_$(dpkg --print-architecture).deb" && apt-get update && apt-get install --no-install-recommends -y ./selkies-js-interposer.deb && rm -f selkies-js-interposer.deb && \
     apt-get clean && rm -rf /var/lib/apt/lists/* /var/cache/debconf/* /var/log/* /tmp/* /var/tmp/*
 
 # Install the KasmVNC web interface and RustDesk for fallback
 RUN KASMVNC_VERSION="$(curl -fsSL "https://api.github.com/repos/kasmtech/KasmVNC/releases/latest" | jq -r '.tag_name' | sed 's/[^0-9\.\-]*//g')" && \
-    cd /tmp && curl -o kasmvncserver.deb -fsSL "https://github.com/kasmtech/KasmVNC/releases/download/v${KASMVNC_VERSION}/kasmvncserver_$(grep UBUNTU_CODENAME= /etc/os-release | cut -d= -f2 | tr -d '\"')_${KASMVNC_VERSION}_$(dpkg --print-architecture).deb" && apt-get update && apt-get install --no-install-recommends -y ./kasmvncserver.deb libdatetime-perl && rm -f kasmvncserver.deb && \
+    cd /tmp && curl -o kasmvncserver.deb -fsSL "https://github.com/kasmtech/KasmVNC/releases/download/v${KASMVNC_VERSION}/kasmvncserver_$(grep '^VERSION_CODENAME=' /etc/os-release | cut -d= -f2 | tr -d '\"')_${KASMVNC_VERSION}_$(dpkg --print-architecture).deb" && apt-get update && apt-get install --no-install-recommends -y ./kasmvncserver.deb libdatetime-perl && rm -f kasmvncserver.deb && \
     RUSTDESK_VERSION="$(curl -fsSL "https://api.github.com/repos/rustdesk/rustdesk/releases/latest" | jq -r '.tag_name' | sed 's/[^0-9\.\-]*//g')" && \
     cd /tmp && curl -o rustdesk.deb -fsSL "https://github.com/rustdesk/rustdesk/releases/download/${RUSTDESK_VERSION}/rustdesk-${RUSTDESK_VERSION}-$(uname -m).deb" && apt-get update && apt-get install --no-install-recommends -y ./rustdesk.deb && rm -f rustdesk.deb && \
     YQ_VERSION="$(curl -fsSL "https://api.github.com/repos/mikefarah/yq/releases/latest" | jq -r '.tag_name' | sed 's/[^0-9\.\-]*//g')" && \