add bash-it

dot_bash_it/plugins/available/go.plugin.bash

@@ -0,0 +1,36 @@
+# shellcheck shell=bash
+cite about-plugin
+about-plugin 'go environment variables & path configuration'
+
+# Load after basher and goenv
+# BASH_IT_LOAD_PRIORITY: 270
+
+# Test `go version` because goenv creates shim scripts that will be found in PATH
+# but do not always resolve to a working install.
+{ _command_exists go && go version &> /dev/null; } || return 0
+
+export GOROOT="${GOROOT:-$(go env GOROOT)}"
+export GOPATH="${GOPATH:-$(go env GOPATH)}"
+
+# $GOPATH/bin is the default location for binaries. Because GOPATH accepts a list of paths and each
+# might be managed differently, we add each path's /bin folder to PATH using pathmunge,
+# while preserving ordering.
+# e.g. GOPATH=foo:bar  ->  PATH=foo/bin:bar/bin
+_bash-it-gopath-pathmunge() {
+	_about 'Ensures paths in GOPATH are added to PATH using pathmunge, with /bin appended'
+	_group 'go'
+	if [[ -z $GOPATH ]]; then
+		echo 'GOPATH empty' >&2
+		return 1
+	fi
+	local paths i
+	IFS=: read -r -a paths <<< "$GOPATH"
+	i=${#paths[@]}
+	while [[ $i -gt 0 ]]; do
+		i=$((i - 1))
+		if [[ -n "${paths[i]}" ]]; then
+			pathmunge "${paths[i]}/bin"
+		fi
+	done
+}
+_bash-it-gopath-pathmunge