Add kontext1.0.0

6 files changed, 181 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..61f6544
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,11 @@
+configure~
+depcomp
+install-sh
+Makefile
+Makefile.in
+config.log
+config.status
+aclocal.m4
+missing
+autom4te*
+kontext
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..33502b7
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,8 @@
+bin_SCRIPTS = kontext
+man1_MANS = kontext.1
+CLEANFILES = $(bin_SCRIPTS)
+
+if ENABLE_ZSH_COMPLETION
+zshcompletiondir = $(ZSH_COMPLETION_DIR)
+dist_zshcompletion_DATA = completions/zsh/_kontext
+endif
diff --git a/completions/zsh/_kontext b/completions/zsh/_kontext
new file mode 100644
index 0000000..1f2ab78
--- /dev/null
+++ b/completions/zsh/_kontext
@@ -0,0 +1,17 @@
+#compdef kontext
+
+__kubectl_context_list() {
+  local -a ctx_list_disp ctx_list
+  local expl
+  IFS=$'\n' ctx_list=($(kubectl config get-contexts -o name))
+  _wanted ctx expl 'kubernetes context' compadd "$@" "$ctx_list_disp[@]" - "${(@)ctx_list}"
+}
+
+__kontext() {
+  _arguments \
+    ':ctx arg:__kubectl_context_list' \
+    - set1 '-h[help]' \
+    - set2 '-n[namespace]'
+}
+
+compdef __kontext kontext
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..d217716
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,40 @@
+AC_INIT([kontext], [1.0.0], [christian@segundo.io])
+AM_INIT_AUTOMAKE([foreign no-dependencies])
+AC_CONFIG_FILES([Makefile])
+
+AC_SUBST([CC])
+
+AC_PATH_PROG([ENV_ABSOLUTE_PATH], [env])
+AS_IF([test x"$ENV_ABSOLUTE_PATH" = x""], [AC_MSG_ERROR([env is not available])])
+AC_SUBST([ENV_ABSOLUTE_PATH])
+
+AC_CHECK_PROG(BASH_CHECK,bash,yes)
+AC_CHECK_PROG(KUBECTL_CHECK,kubectl,yes)
+AC_CHECK_PROG(MKTEMP_CHECK,mktemp,yes)
+AS_IF([test x"$BASH_CHECK" != x"yes"], [AC_MSG_ERROR([bash is not available])])
+AS_IF([test x"$KUBECTL_CHECK" != x"yes"], [AC_MSG_ERROR([kubectl is not available])])
+AS_IF([test x"$MKTEMP_CHECK" != x"yes"], [AC_MSG_ERROR([mktemp is not available])])
+
+AC_CACHE_CHECK([for GNU getopt], [ac_cv_path_gnu_getopt],
+  [AC_PATH_PROGS_FEATURE_CHECK([gnu_getopt], [getopt],
+    [[output=`$ac_path_gnu_getopt -V | grep util-linux`
+      test -n "$output" \
+      && ac_cv_path_gnu_getopt=$ac_path_gnu_getopt]],
+    [AC_MSG_ERROR([could not find getopt from util-linux])])])
+AC_SUBST([GNU_GETOPT], [$ac_cv_path_gnu_getopt])
+
+AC_ARG_WITH([zsh-completion-dir],
+    AS_HELP_STRING([--with-zsh-completion-dir[=PATH]],
+        [Install the zsh auto-completion script in this directory. @<:@default=yes@:>@]),
+    [],
+    [with_zsh_completion_dir=yes])
+AS_IF([test "x$with_zsh_completion_dir" = "xyes"],
+  [ZSH_COMPLETION_DIR="$datadir/zsh/site-functions"],
+  [ZSH_COMPLETION_DIR="$with_zsh_completion_dir"])
+
+AC_SUBST([ZSH_COMPLETION_DIR])
+AM_CONDITIONAL([ENABLE_ZSH_COMPLETION], [test "x$with_zsh_completion_dir" != "xno"])
+
+AC_CONFIG_FILES([kontext], [chmod +x kontext])
+
+AC_OUTPUT
diff --git a/kontext.1 b/kontext.1
new file mode 100644
index 0000000..2b1bc40
--- /dev/null
+++ b/kontext.1
@@ -0,0 +1,54 @@
+.Dd May 21, 2023
+.Dt KONTEXT 1
+.Os
+.
+.Sh NAME
+.Nm kontext
+.Nd per shell Kubernetes contexts
+.
+.Sh SYNOPSIS
+.Nm
+.Op Fl h
+.Op Fl n Ar namespace
+.Ar context 
+.
+.Sh DESCRIPTION
+
+The
+.Nm
+program sets per shell Kubernetes contexts
+to allow power users to work on multiple
+clusters at the same time.
+.Pp
+Note that
+.Nm
+is distributed as a shell fragment
+that must be sourced. In order to
+use it, add the following alias
+to your shell:
+.Bl -tag -width Ds
+.It kontext="source kontext"
+.El
+.
+.Pp
+The arguments are as follows:
+.Bl -tag -width Ds
+.It Fl n | -namespace Ar namespace
+Switch to
+.Ar namespace . The default
+namespace is 'default'.
+.It Fl h | -help
+Shows a short help message.
+.It Ar context
+The context name to use.
+.El
+.
+.Sh EXAMPLES
+.Bd -literal -offset indent
+$ kontext -n kube-system foo
+$ kontext foo
+$ kontext -n kube-system
+.Ed
+.
+.Sh AUTHORS
+.An Christian Segundo Aq Mt christian@segundo.io
diff --git a/kontext.in b/kontext.in
new file mode 100755
index 0000000..a16798a
--- /dev/null
+++ b/kontext.in
@@ -0,0 +1,51 @@
+#!@ENV_ABSOLUTE_PATH@ bash
+
+[[ "${BASH_SOURCE[0]}" != "${0}" ]] || { >&2 cat <<EOF
+Warning: kontext is not being sourced, add this alias to your shell:
+  alias kontext="source kontext"
+EOF
+exit 1; }
+
+kontext_func () {
+  local TEMP
+  TEMP=$(@GNU_GETOPT@ -o hn: --long help,namespace: -n 'kontext' -- "$@")
+  eval set -- "$TEMP"
+
+  local HELP=false
+  local NAMESPACE=""
+  local CTX=""
+
+  while true; do
+      case "$1" in
+          -h | --help ) HELP=true; shift ;;
+          -n | --namespace ) NAMESPACE="$2"; shift 2 ;;
+          -- ) CTX="$2"; shift; break ;;
+          * ) break ;;
+      esac
+  done
+
+  if [ -z "$CTX" ] && [ -n "$NAMESPACE" ]; then
+    CTX=$(kubectl config current-context)
+  fi
+
+  if [ -z "$CTX" ] || [ "$HELP" = true ]; then
+    cat <<-EOF
+Usage:
+  kontext [-h|--help]"
+    Show this text.
+  kontext [-n|--namespace <namespace>] [<context>]"
+    Switch to the given namespace and context.
+
+More information may be found in the kontext(1) man page.
+EOF
+    return 1
+  else
+    TMP_KUBECONFIG=$(mktemp -t kubeconfig-XXXXXX)
+    kubectl config view --raw > "$TMP_KUBECONFIG"
+    export KUBECONFIG="$TMP_KUBECONFIG"
+    kubectl config use-context "$CTX" && \
+    kubectl config set-context --current --namespace="$NAMESPACE"
+  fi
+}
+
+kontext_func "$@"