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71 lines
2.2 KiB
Bash
71 lines
2.2 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: 2021-02-25 10:10:53 +0000 (Thu, 25 Feb 2021)
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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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if [ "$1" = "${BASH_SOURCE[0]##*/}" ]; then
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shift
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fi
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# XXX: Edit this - hardcode for localized convenience
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CONTEXT="${1:-docker-desktop}"
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# if set will also set the namespace for extra convenience
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NAMESPACE="${2:-}"
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#NAMESPACE="jenkins"
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tmpdir="/tmp/.kube"
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mkdir -pv "$tmpdir"
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default_kubeconfig="${HOME:-$(cd ~ && pwd)}/.kube/config"
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original_kubeconfig="${KUBECONFIG:-$default_kubeconfig}"
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# reload safety - do not source from new tmpdir - not necessary for direnv but useful for local sourcing tests
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#if [[ "$original_kubeconfig" =~ $tmpdir ]]; then
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# echo "ignoring \$KUBECONFIG=$original_kubeconfig, using default home location $default_kubeconfig"
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# original_kubeconfig="$default_kubeconfig"
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#fi
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# isolate the kubernetes context to avoid a race condition affecting any other shells or scripts
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# epoch is added because $$ and $PPID are direnv sub-processes and may be reused later, so using epoch to add uniqueness
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epoch="$(date +%s)"
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export KUBECONFIG="$tmpdir/config.${EUID:-${UID:-$(id -u)}}.$$.$epoch"
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# load your real kube config to isolated staging area to source the context info
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if [ -f "$original_kubeconfig" ]; then
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cp "$original_kubeconfig" "$KUBECONFIG"
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elif [ -f "$default_kubeconfig" ]; then
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cp "$default_kubeconfig" "$KUBECONFIG"
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elif [ -f "$PWD/.kube/config" ]; then
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cp "$PWD/.kube/config" "$KUBECONFIG"
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else
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echo "WARNING: failed to find one of:
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$original_kubeconfig
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$default_kubeconfig
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$PWD/.kube/config
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" >&2
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fi
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if command -v kubectl &>/dev/null &&
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kubectl config get-contexts -o name 2>/dev/null | grep -Fxq "$CONTEXT"; then
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kubectl config use-context "$CONTEXT"
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if [ -n "${NAMESPACE:-}" ]; then
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kubectl config set-context "$CONTEXT" --namespace "$NAMESPACE"
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fi
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fi
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