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84 lines
2.8 KiB
Bash
84 lines
2.8 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2024-07-10 18:12:25 +0200 (Wed, 10 Jul 2024)
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#
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# https///github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC1090,SC1091
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. "$srcdir/lib/git.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Runs Docker Build and auto-generates docker image name and tag from relative Git path and commit short SHA
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If it's a dirty checkout with added / modified files then appends '-dirty-<checksum>' to the docker tag
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where '<checksum>' is another short hash of the Git status porcelain to differentiate it from the clean unmodified commit version
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Useful to compare docker image sizes between your clean and modified versions of Dockerfile or contents
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If you want to set the docker image name instead of letting it default to the git relative root dir, then
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set the environment variable:
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export DOCKER_BUILD_IMAGE_NAME=...
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The dirty commit only hashes which files were added / changed, not their content changes
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If you really want the hash to change for any differing content changes, then set the environment variable:
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export DOCKER_BUILD_HASH_CONTENTS=1
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="[<context_path> <docker_build_options>]"
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help_usage "$@"
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context_dir="${1:-.}"
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shift || :
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docker_build_options=("$@")
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if ! is_in_git_repo; then
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die "Not in a Git repo to auto-determine the Git short sha and relative path for docker image naming"
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fi
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git_commit_short_sha="$(git_commit_short_sha)"
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image_name="${DOCKER_BUILD_IMAGE_NAME:-}"
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if is_blank "$image_name"; then
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git_relative_dir="$(git_relative_dir)"
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image_name="${git_relative_dir////--}"
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fi
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dirty=""
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if git status --porcelain | grep -q . ; then
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if [ "${DOCKER_BUILD_HASH_CONTENTS:-}" = 1 ]; then
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git_root="$(git_root)"
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# prepend the git root dir to each file because 'git status --porcelain' gives from relative root of repo
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# then cat each file and pipe them all into md5sum to detect any content differences in the git repo for a unique hashref
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dirty="-dirty-$(git status --porcelain | cut -c 4- | sed "s|^|$git_root/|" | xargs cat | md5sum | cut -c 1-7)"
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else
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# if 7 char short hash is good enough for Git then it's good enough for me
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dirty="-dirty-$(git status --porcelain | md5sum | cut -c 1-7)"
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fi
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fi
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set -x
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docker build "$context_dir" -t "${image_name}:${git_commit_short_sha}${dirty}" "${docker_build_options[@]}"
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docker images | grep "^$image_name"
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