fix(scripts): add GOBIN fallback and support any cwd (#430)

Author: ardnew

scripts/participle

@@ -1,4 +1,6 @@
 #!/bin/bash
 set -euo pipefail
-(cd "$(dirname "$0")/../cmd/participle" && go install github.com/alecthomas/participle/v2/cmd/participle)
-exec "$(go env GOBIN)/participle" "$@"
+GOBIN=$(go env GOBIN)
+[[ -d "${GOBIN}" ]] || GOBIN=$(go env GOPATH)/bin
+go install -C "$(dirname "$0")/../cmd/participle" 'github.com/alecthomas/participle/v2/cmd/participle'
+exec "${GOBIN}/participle" "$@"

scripts/regen-lexer

@@ -1,3 +1,5 @@
 #!/bin/bash
 set -euo pipefail
-participle gen lexer --name GeneratedBasic internal < lexer/internal/basiclexer.json | gofmt > lexer/internal/basiclexer.go
+path=$(dirname "${0}")
+base="${path}/../lexer/internal/basiclexer"
+"${path}/participle" gen lexer --name GeneratedBasic internal < "${base}.json" | gofmt > "${base}.go"