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Fix options handling, let re-enable switches when disabled by default (…
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…#129)
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@Hazzard17h
Hazzard17h authored Apr 13, 2022
1 parent 04dc939 commit d718b9c
Showing 1 changed file with 54 additions and 40 deletions.
94 changes: 54 additions & 40 deletions kubetail
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Original file line number Diff line number Diff line change
@@ -1,24 +1,24 @@
#!/bin/bash
if [ -z "${KUBECTL_BIN}" ]; then
if hash kubectl 2>/dev/null; then
KUBECTL_BIN='kubectl'
elif hash kubectl.exe 2>/dev/null; then
KUBECTL_BIN='kubectl.exe'
elif hash microk8s 2>/dev/null; then
KUBECTL_BIN='microk8s.kubectl'
fi
if hash kubectl 2>/dev/null; then
KUBECTL_BIN='kubectl'
elif hash kubectl.exe 2>/dev/null; then
KUBECTL_BIN='kubectl.exe'
elif hash microk8s 2>/dev/null; then
KUBECTL_BIN='microk8s.kubectl'
fi
fi

if ! hash "${KUBECTL_BIN}"; then
echo >&2 "kubectl is not installed"
exit 1
if ! hash "${KUBECTL_BIN}"; then
echo >&2 "kubectl is not installed"
exit 1
fi

readonly PROGNAME=$(basename $0)

calculate_default_namespace() {
local config_namespace=$(${KUBECTL_BIN} config view --minify --output 'jsonpath={..namespace}')
echo "${KUBETAIL_NAMESPACE:-${config_namespace:-default}}"
local config_namespace=$(${KUBECTL_BIN} config view --minify --output 'jsonpath={..namespace}')
echo "${KUBETAIL_NAMESPACE:-${config_namespace:-default}}"
}

default_previous="${KUBETAIL_PREVIOUS:-false}"
Expand Down Expand Up @@ -47,7 +47,7 @@ show_color_index="${default_show_color_index}"

if [[ ${1} != -* ]]
then
pod="${1}"
pod="${1}"
fi
containers=()
selector=()
Expand All @@ -59,39 +59,39 @@ dryrun=false
cluster=""
namespace_arg="-n ${default_namespace}"

usage="${PROGNAME} <search term> [-h] [-c] [-n] [-t] [-l] [-d] [-p] [-s] [-b] [-k] [-v] [-r] [-i] -- tail multiple Kubernetes pod logs at the same time
usage="${PROGNAME} <search term> [-h] [-c] [-n] [-t] [-l] [-f] [-d] [-P] [-p] [-s] [-b] [-e] [-j] [-k] [-z] [-v] [-r] [-i] -- tail multiple Kubernetes pod logs at the same time
where:
-h, --help Show this help text
-h, --help Show this help text.
-c, --container The name of the container to tail in the pod (if multiple containers are defined in the pod).
Defaults to all containers in the pod. Can be used multiple times.
-t, --context The k8s context. ex. int1-context. Relies on ~/.kube/config for the contexts.
-l, --selector Label selector. If used the pod name is ignored.
-n, --namespace The Kubernetes namespace where the pods are located (defaults to \"${default_namespace}\")
-n, --namespace The Kubernetes namespace where the pods are located. Defaults to \"${default_namespace}\".
-f, --follow Specify if the logs should be streamed. (true|false) Defaults to ${default_follow}.
-d, --dry-run Print the names of the matched pods and containers, then exit.
-P, --prefix Specify if add the pod name prefix before each line. (true|false) Defaults to ${default_prefix}.
-p, --previous Return logs for the previous instances of the pods, if available. (true|false) Defaults to ${default_previous}.
-s, --since Only return logs newer than a relative duration like 5s, 2m, or 3h. Defaults to ${default_since}.
-b, --line-buffered This flags indicates to use line-buffered. Defaults to false.
-e, --regex The type of name matching to use (regex|substring)
-j, --jq If your output is json - use this jq-selector to parse it.
-b, --line-buffered This flags indicates to use line-buffered. (true|false) Defaults to ${default_line_buffered:-false}.
-e, --regex The type of name matching to use (regex|substring). Defaults to ${regex}.
-j, --jq If your output is json - use this jq-selector to parse it. Defaults to \"${default_jq_selector}\".
example: --jq \".logger + \\\" \\\" + .message\"
-k, --colored-output Use colored output (pod|line|false).
pod = only color pod name, line = color entire line, false = don't use any colors.
Defaults to ${default_colored_output}.
-z, --skip-colors Comma-separated list of colors to not use in output
If you have green foreground on black, this will skip dark grey and some greens -z 2,8,10
Defaults to: ${default_skip_colors}
--timestamps Show timestamps for each log line
-z, --skip-colors Comma-separated list of colors to not use in output.
If you have green foreground on black, this will skip dark grey and some greens: -z 2,8,10
Defaults to: ${default_skip_colors}.
--timestamps Show timestamps for each log line. (true|false) Defaults to ${default_timestamps:-false}.
--tail Lines of recent log file to display. Defaults to ${default_tail}, showing all log lines.
-v, --version Prints the kubetail version
-v, --version Prints the kubetail version.
-r, --cluster The name of the kubeconfig cluster to use.
-i, --show-color-index Show the color index before the pod name prefix that is shown before each log line.
Normally only the pod name is added as a prefix before each line, for example \"[app-5b7ff6cbcd-bjv8n]\",
but if \"show-color-index\" is true then color index is added as well: \"[1:app-5b7ff6cbcd-bjv8n]\".
-i, --show-color-index Show the color index before the pod name prefix that is shown before each log line.
Normally only the pod name is added as a prefix before each line, for example \"[app-5b7ff6cbcd-bjv8n]\",
but if \"show-color-index\" is true then color index is added as well: \"[1:app-5b7ff6cbcd-bjv8n]\".
This is useful if you have color blindness or if you want to know which colors to exclude (see \"--skip-colors\").
Defaults to ${default_show_color_index}.
Defaults to ${default_show_color_index}.
examples:
${PROGNAME} my-pod-v1
Expand All @@ -118,7 +118,11 @@ if [ "$#" -ne 0 ]; then
containers+=("$2")
;;
-e|--regex)
regex="regex"
if [ "$2" = "substring" ]; then
regex="substring"
else
regex="regex"
fi
;;
-t|--context)
context="$2"
Expand All @@ -134,7 +138,11 @@ if [ "$#" -ne 0 ]; then
dryrun=true
;;
-p|--previous)
previous=true
if [ "$2" = "false" ]; then
previous="false"
else
previous="true"
fi
;;
-s|--since)
if [ -z "$2" ]; then
Expand All @@ -154,15 +162,21 @@ if [ "$#" -ne 0 ]; then
-f|--follow)
if [ "$2" = "false" ]; then
follow="false"
else
follow="true"
fi
;;
-P|--prefix)
if [ "$2" = "false" ]; then
prefix="false"
else
prefix="true"
fi
;;
-b|--line-buffered)
if [ "$2" = "true" ]; then
if [ "$2" = "false" ]; then
line_buffered=""
else
line_buffered="| grep - --line-buffered"
fi
;;
Expand All @@ -189,23 +203,23 @@ if [ "$#" -ne 0 ]; then
;;
--timestamps)
if [ "$2" = "false" ]; then
timestamps="$1=$2"
timestamps="$1=$2"
else
timestamps="$1"
timestamps="$1"
fi
;;
--tail)
if [ -z "$2" ]; then
tail="${default_tail}"
tail="${default_tail}"
else
tail="$2"
tail="$2"
fi
;;
-i|--show-color-index)
if [ -z "$2" ]; then
show_color_index="${default_show_color_index}"
show_color_index="${default_show_color_index}"
else
show_color_index="$2"
show_color_index="$2"
fi
;;
--)
Expand All @@ -216,7 +230,7 @@ if [ "$#" -ne 0 ]; then
exit 1
;;
# an option argument, continue
*) ;;
*) ;;
esac
shift
done
Expand Down Expand Up @@ -340,7 +354,7 @@ for pod in ${matching_pods[@]}; do
fi
fi

if [ ${colored_output} == "false" ] || [ ${colored_output} == "pod" ]; then
if [ ${colored_output} == "false" ] || [ ${colored_output} == "pod" ]; then
colored_line="${prefix_line}\$REPLY"
else
colored_line="${prefix_line}${color_start}\$REPLY${color_end}"
Expand All @@ -367,7 +381,7 @@ done

if [[ ${dryrun} == true ]];
then
exit 0
exit 0
fi

# Join all log commands into one string separated by " & "
Expand Down

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