docker build
built-in 
0.0% Savings
0 Commands
0 Tokens saved
2 Tests
Install
Safety checks passed
Filter definition
command = ["docker build", "docker buildx build"]
description = "Strip layer transfer noise; show build steps and errors"
skip = [
"^ +=> +=> [a-z]", # Skip transferring, fetching, extracting
"^ +=> +\\[internal\\]", # Skip metadata loading (noise)
"^Sending build context",
]
[on_success]
skip = [
"^ +=> +\\[[0-9/]+\\]", # Skip routine steps like [1/5]
"^Step [0-9/]+ : ", # Skip legacy step headers
"^ ---> [0-9a-f]+", # Skip legacy hash markers
"^ ---> Using cache", # Skip legacy cache messages
]
[on_failure]
tail = 50
Examples
failed build shows ERROR and package name
~426 tokens → ~326 tokens
(23% saved)
Raw output
[+] Building 4.5s (8/12) => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 37B 0.0s => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => [internal] load metadata for docker.io/library/ubuntu:22.04 0.4s => [1/5] FROM docker.io/library/ubuntu:22.04@sha256:ed15... 0.0s => CACHED [2/5] RUN apt-get update 0.0s => [3/5] RUN apt-get install -y --no-install-recommends curl git 4.1s => => # Get:1 http://archive.ubuntu.com/ubuntu jammy InRelease [270 kB] => => # Get:2 http://archive.ubuntu.com/ubuntu jammy-updates InRelease [119 kB] => => # Get:3 http://archive.ubuntu.com/ubuntu jammy-backports InRelease [109 kB] => => # Get:4 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB] => => # Fetching... => => # Extracting... => [4/5] RUN curl -sL https://deb.nodesource.com/setup_18.x | bash - 0.2s => ERROR [5/5] RUN apt-get install -y nodejss 0.1s ------ > [5/5] RUN apt-get install -y nodejss: #0 0.123 Reading package lists... #0 0.456 Building dependency tree... #0 0.789 Reading state information... #0 0.901 E: Unable to locate package nodejss ------ Dockerfile:12 -------------------- 10 | RUN curl -sL https://deb.nodesource.com/setup_18.x | bash - 11 | 12 | >>> RUN apt-get install -y nodejss 13 | -------------------- ERROR: failed to solve: process "/bin/sh -c apt-get install -y nodejss" did not complete successfully: exit code: 100
Filtered output
[+] Building 4.5s (8/12) => [1/5] FROM docker.io/library/ubuntu:22.04@sha256:ed15... 0.0s => CACHED [2/5] RUN apt-get update 0.0s => [3/5] RUN apt-get install -y --no-install-recommends curl git 4.1s => => # Get:1 http://archive.ubuntu.com/ubuntu jammy InRelease [270 kB] => => # Get:2 http://archive.ubuntu.com/ubuntu jammy-updates InRelease [119 kB] => => # Get:3 http://archive.ubuntu.com/ubuntu jammy-backports InRelease [109 kB] => => # Get:4 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB] => => # Fetching... => => # Extracting... => [4/5] RUN curl -sL https://deb.nodesource.com/setup_18.x | bash - 0.2s => ERROR [5/5] RUN apt-get install -y nodejss 0.1s ------ > [5/5] RUN apt-get install -y nodejss: #0 0.123 Reading package lists... #0 0.456 Building dependency tree... #0 0.789 Reading state information... #0 0.901 E: Unable to locate package nodejss ------ Dockerfile:12 -------------------- 10 | RUN curl -sL https://deb.nodesource.com/setup_18.x | bash - 11 | 12 | >>> RUN apt-get install -y nodejss 13 | -------------------- ERROR: failed to solve: process "/bin/sh -c apt-get install -y nodejss" did not complete successfully: exit code: 100
successful build shows CACHED and FINISHED, hides noise
~442 tokens → ~211 tokens
(52% saved)
Raw output
[+] Building 1.2s (12/12) FINISHED => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 37B 0.0s => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => [internal] load metadata for docker.io/library/node:18-alpine 0.5s => [base 1/2] FROM docker.io/library/node:18-alpine@sha256:c7c2... 0.0s => CACHED [base 2/2] WORKDIR /app 0.0s => CACHED [deps 1/2] COPY package.json package-lock.json ./ 0.0s => CACHED [deps 2/2] RUN npm ci 0.0s => CACHED [build 1/2] COPY . . 0.0s => CACHED [build 2/2] RUN npm run build 0.0s => [final 1/2] COPY --from=build /app/dist /usr/share/nginx/html 0.1s => [final 2/2] EXPOSE 80 0.0s => exporting to image 0.1s => => exporting layers 0.1s => => writing image sha256:d5f... 0.0s => => naming to docker.io/library/myapp:latest 0.0s # Legacy (non-BuildKit) output Sending build context to Docker daemon 2.048kB Step 1/10 : FROM node:18-alpine ---> c7c2... Step 2/10 : WORKDIR /app ---> Using cache ---> d5f... Step 3/10 : COPY package.json package-lock.json ./ ---> Using cache ---> a1b... Step 4/10 : RUN npm ci ---> Using cache ---> f2e... Successfully built f2e... Successfully tagged myapp:latest
Filtered output
[+] Building 1.2s (12/12) FINISHED => [base 1/2] FROM docker.io/library/node:18-alpine@sha256:c7c2... 0.0s => CACHED [base 2/2] WORKDIR /app 0.0s => CACHED [deps 1/2] COPY package.json package-lock.json ./ 0.0s => CACHED [deps 2/2] RUN npm ci 0.0s => CACHED [build 1/2] COPY . . 0.0s => CACHED [build 2/2] RUN npm run build 0.0s => [final 1/2] COPY --from=build /app/dist /usr/share/nginx/html 0.1s => [final 2/2] EXPOSE 80 0.0s => exporting to image 0.1s # Legacy (non-BuildKit) output Successfully built f2e... Successfully tagged myapp:latest
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