hastysite.nim
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import json, strutils, yaml, pegs, os, securehash, sequtils import config type HastySite* = object assets*: string contents*: string layouts*: string output*: string rules*: string temp*: string meta: string checksums: string tempContents: string modified: seq[string] NoMetadataException* = ref Exception proc preprocessFile(file, dir: string, obj: var JsonNode): string = let fileid = file.replace(dir, "") var f: File discard f.open(file) var s, yaml = "" result = "" var delimiter = 0 while f.readLine(s): if delimiter >= 2: result &= s else: if s.match(peg"'-' '-' '-' '-'*"): delimiter.inc else: yaml &= "\n" & s if yaml == "": raise NoMetadataException(msg: "No metadata found in file: " & file) if not obj.hasKey("contents"): obj["contents"] = newJObject() obj["contents"][fileid] = yaml.loadToJson()[0] f.close() proc checkFile(file, dir: string, obj: var JsonNode): bool = let fileid = file.replace(dir, "") if not obj.hasKey("contents"): obj["contents"] = newJObject() var oldChecksum = "" if obj["contents"].hasKey(fileid): oldChecksum = obj["contents"][fileid].getStr var newChecksum = $secureHashFile(file) obj["contents"][fileid] = %newChecksum return oldChecksum != newChecksum proc get(json: JsonNode, key, default: string): string = if json.hasKey(key): return json[key].getStr else: return default proc confirmClean(hs: HastySite): bool = stdout.write("Delete directory '$1' and all its contents? [Y/n] " % hs.temp) let confirm = stdin.readChar return confirm == 'Y' or confirm == 'y' proc quitIfNotExists(file: string) = if not file.fileExists: quit("Error: File '$1' not found." % file) proc newHastySite*(file: string): HastySite = let json = file.parseFile() result.assets = json.get("assets", "assets") result.contents = json.get("contents", "contents") result.layouts = json.get("layouts", "layouts") result.output = json.get("output", "output") result.rules = json.get("rules", "rules.min") result.temp = json.get("temp", "temp") result.meta = result.temp / "metadata.json" result.checksums = result.temp / "checksums.json" result.tempContents = result.temp / result.contents proc preprocess*(hs: HastySite) = var meta = newJObject() for f in hs.contents.walkDirRec(): let content = f.preprocessFile(hs.contents & DirSep, meta) let dest = hs.temp/f dest.parentDir.createDir dest.writeFile(content) hs.meta.writeFile(meta.pretty) proc detectChanges*(hs: var HastySite) = hs.modified = newSeq[string](0) if not hs.checksums.fileExists: hs.checksums.writeFile("{}") var cs = hs.checksums.parseFile() let files = toSeq(hs.tempContents.walkDirRec()) let dir = hs.tempContents hs.modified = filter(files) do (f: string) -> bool: f.checkFile(dir & DirSep, cs) hs.checksums.writeFile(cs.pretty) proc init*(dir: string) = var json = newJObject() json["contents"] = %"contents" json["assets"] = %"assets" json["layouts"] = %"layouts" json["temp"] = %"temp" json["output"] = %"output" for key, value in json.pairs: createDir(dir/value.getStr) json["title"] = %"My Web Site" json["rules"] = %"rules.min" writeFile(dir/json["rules"].getStr, "") writeFile(dir/"config.json", json.pretty) proc clean*(hs: HastySite) = hs.temp.removeDir proc build*(hs: var HastySite) = echo "Preprocessing..." hs.preprocess() hs.detectChanges() # TODO echo hs.modified when isMainModule: import vendor/commandeer proc usage(): string = return """ $1 v$2 - a tiny static site generator (c) 2016 Fabio Cevasco Usage: hastysite command Commands: init Initializes a new site in the current directory. build Builds the site. clean Cleans temporary file. rebuild Rebuilds the site, after cleaning temporary files. Options: -h, --help Print this help -v, --version Print the program version""" % [appname, version] commandline: argument command, string exitoption "help", "h", usage() exitoption "version", "v", version errormsg usage() let pwd = getCurrentDir() let cfg = pwd/"config.json" case command: of "init": pwd.init() of "build": quitIfNotExists(cfg) var hs = newHastySite(cfg) hs.build() of "clean": quitIfNotExists(cfg) var hs = newHastySite(cfg) if hs.confirmClean(): hs.clean() else: quit("Aborted.") of "rebuild": quitIfNotExists(cfg) var hs = newHastySite(cfg) if hs.confirmClean(): hs.clean() hs.build() else: quit("Aborted.") else: quit("Error: Command '$1' is not supported" % command) |