railpack

1// there are certain commands which `rm -rf node_modules`, which will cause a cache checksum docker error.2// this cleanse operation imperfectly detects this case and removes node_modules from the cache keys to avoid this common user error.3// more info here: https://github.com/railwayapp/railpack/pull/2594 5package node6 7import (8	"regexp"9 10	"github.com/railwayapp/railpack/core/plan"11)12 13var (14	npmCiCommandRegex      = regexp.MustCompile(`(?i)\bnpm\s+ci\b`)15	removeNodeModulesRegex = regexp.MustCompile(`(?i)\b(?:rm\s+-r[f]?|rmdir|rimraf)\s+(?:\S*\/)?node_modules\b`)16)17 18func willRemoveNodeModules(commands []plan.Command) bool {19	for _, cmd := range commands {20		if execCmd, ok := cmd.(plan.ExecCommand); ok {21			if npmCiCommandRegex.MatchString(execCmd.Cmd) || removeNodeModulesRegex.MatchString(execCmd.Cmd) {22				return true23			}24		}25	}26	return false27}28 29func (p *NodeProvider) CleansePlan(buildPlan *plan.BuildPlan) {30	var nodeModulesCacheKey string31	for cacheName, cacheDef := range buildPlan.Caches {32		if cacheDef.Directory == NODE_MODULES_CACHE {33			nodeModulesCacheKey = cacheName34			break35		}36	}37 38	if nodeModulesCacheKey == "" {39		return40	}41 42	for i, step := range buildPlan.Steps {43		if step.Name == "install" || !willRemoveNodeModules(step.Commands) {44			continue45		}46 47		before := len(step.Caches)48		if before == 0 {49			continue50		}51 52		var newCaches []string53		for _, name := range step.Caches {54			if name != "" && name != nodeModulesCacheKey {55				newCaches = append(newCaches, name)56			}57		}58 59		buildPlan.Steps[i].Caches = newCaches60	}61}62