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docker: add core22 base #4290

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docker: add core22 base #4290

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16481af
docker: add core22 to the image
abitrolly Jul 23, 2023
3a8081e
Fix source for `core22`
abitrolly Sep 27, 2023
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41 changes: 12 additions & 29 deletions docker/Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,42 +1,20 @@
ARG RISK=edge
ARG UBUNTU=xenial
ARG RISK=stable
ARG UBUNTU=22.04
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@VladRassokhin VladRassokhin Sep 26, 2023 •
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Minor: In README.md codename of release is used, probably makes sense to stick to codenames and replace with jammy ?

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I rarely remember which release name is which version. I remember that 22.04 is the latest LTS, and I guess that's just what matters here.


FROM ubuntu:$UBUNTU as builder
ARG RISK
ARG UBUNTU
RUN echo "Building snapcraft:$RISK in ubuntu:$UBUNTU"

# Grab dependencies
RUN apt-get update
RUN apt-get dist-upgrade --yes
RUN apt-get install --yes \
RUN apt-get update && apt-get -y dist-upgrade && apt-get -y install \
curl \
jq \
squashfs-tools

# Grab the core snap (for backwards compatibility) from the stable channel and
# unpack it in the proper place.
RUN curl -L $(curl -H 'X-Ubuntu-Series: 16' 'https://api.snapcraft.io/api/v1/snaps/details/core' | jq '.download_url' -r) --output core.snap
RUN mkdir -p /snap/core
RUN unsquashfs -d /snap/core/current core.snap

# Grab the core18 snap (which snapcraft uses as a base) from the stable channel
# and unpack it in the proper place.
RUN curl -L $(curl -H 'X-Ubuntu-Series: 16' 'https://api.snapcraft.io/api/v1/snaps/details/core18' | jq '.download_url' -r) --output core18.snap
RUN mkdir -p /snap/core18
RUN unsquashfs -d /snap/core18/current core18.snap

# Grab the core20 snap (which snapcraft uses as a base) from the stable channel
# and unpack it in the proper place.
RUN curl -L $(curl -H 'X-Ubuntu-Series: 16' 'https://api.snapcraft.io/api/v1/snaps/details/core20' | jq '.download_url' -r) --output core20.snap
RUN mkdir -p /snap/core20
RUN unsquashfs -d /snap/core20/current core20.snap

# Grab the snapcraft snap from the $RISK channel and unpack it in the proper
# place.
RUN curl -L $(curl -H 'X-Ubuntu-Series: 16' 'https://api.snapcraft.io/api/v1/snaps/details/snapcraft?channel='$RISK | jq '.download_url' -r) --output snapcraft.snap
RUN mkdir -p /snap/snapcraft
RUN unsquashfs -d /snap/snapcraft/current snapcraft.snap
# Download and unpack snap bases and snapcraft as a snap
COPY --chmod=755 prepare.sh .
RUN ./prepare.sh

# Fix Python3 installation: Make sure we use the interpreter from
# the snapcraft snap:
Expand All @@ -58,11 +36,16 @@ FROM ubuntu:$UBUNTU
COPY --from=builder /snap/core /snap/core
COPY --from=builder /snap/core18 /snap/core18
COPY --from=builder /snap/core20 /snap/core20
COPY --from=builder /snap/core22 /snap/core22
COPY --from=builder /snap/snapcraft /snap/snapcraft
COPY --from=builder /snap/bin/snapcraft /snap/bin/snapcraft

# Generate locale and install dependencies.
RUN apt-get update && apt-get dist-upgrade --yes && apt-get install --yes snapd sudo locales && locale-gen en_US.UTF-8
RUN apt-get update && apt-get -y dist-upgrade && apt-get -y install \
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Minor: not sure whether this change is really necessary as it just changes the order of arguments and adds lines

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It is Docker best practices https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#sort-multi-line-arguments

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Yeah, following best practices is a good thing, but it's not mentioned in the commit message and looks unrelated (could be in another commit and PR)

snapd \
sudo \
locales \
&& locale-gen en_US.UTF-8

# Set the proper environment.
ENV LANG="en_US.UTF-8"
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13 changes: 8 additions & 5 deletions docker/README.md
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@@ -1,16 +1,19 @@
# Creating docker containers for snapcraft

By default the `Dockerfile` builds Ubuntu 16.04 (Xenial) image with `snapcraft` from the `edge` channel.
By default the `Dockerfile` builds Ubuntu 22.04 (Jellyfish) image with
`snapcraft` from the `stable` channel:

docker build . --no-cache

It is however possible to choose the base Ubuntu version and the Snapcraft channel (risk levels):
To choose different Ubuntu version and the Snapcraft channel (risk levels),
use use `--build-arg RISK=<risk>` and `--build-arg UBUNTU=<name>` options:

docker build . --no-cache --build-arg RISK=beta --build-arg UBUNTU=bionic

Possible RISK values:

- `edge`
- `beta`
- `candidate`
- `stable`

To do that, use `--build-arg RISK=<risk>` and `--build-arg UBUNTU=<name>` arguments:

docker build . --no-cache --build-arg RISK=beta --build-arg UBUNTU=bionic
24 changes: 24 additions & 0 deletions docker/prepare.sh
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@@ -0,0 +1,24 @@
#!/bin/bash

set -xeo pipefail


echo "--- unpacking bases for snapcraft/$RISK ---"

# Grab the core snaps (which snapcraft uses as a base) from the stable channel
# and unpack them in the proper place.
BASES="core core18 core20 core22"
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it doesn't make much sense to build a snap with a core18 base if the base of the OCI image is 22.04

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There are many snaps that need core18. Why it is wrong to build core18 with 22.04?

for base in $BASES; do
curl -L "$(curl -H "X-Ubuntu-Series: 16" "https://api.snapcraft.io/api/v1/snaps/details/$base" | jq ".download_url" -r)" --output "$base.snap"
mkdir -p "/snap/$base"
unsquashfs -d "/snap/$base/current" "$base.snap"
done


echo "--- unpacking snapcraft/$RISK ---"

# Grab the snapcraft snap from the $RISK channel and unpack it in the proper
# place.
curl -L "$(curl -H "X-Ubuntu-Series: 16" "https://api.snapcraft.io/api/v1/snaps/details/snapcraft?channel=$RISK" | jq ".download_url" -r)" --output snapcraft.snap
mkdir -p /snap/snapcraft
unsquashfs -d /snap/snapcraft/current snapcraft.snap