lib/project.nim
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import
os,
json,
logging,
strutils,
sequtils,
pegs
type
NiftyProject* = object
dir*: string
storage*: string
commands*: JsonNode
packages*: JsonNode
const niftyTpl* = "nifty.json".slurp
const systemHelp = "help.json".slurp
let placeholder = peg"'{{' {[^}]+} '}}'"
proc newNiftyProject*(dir: string): NiftyProject =
result.dir = dir
proc configFile*(prj: NiftyProject): string =
return prj.dir/"nifty.json"
proc configured*(prj: NiftyProject): bool =
return fileExists(prj.configFile)
proc init*(prj: var NiftyProject, storage: string) =
prj.storage = storage
createDir(prj.dir/prj.storage)
var o = parseJson(niftyTpl % [prj.storage])
prj.configFile.writeFile(o.pretty)
proc load*(prj: var NiftyProject) =
if not prj.configFile.fileExists:
fatal "Project not initialized - configuration file not found."
quit(10)
let cfg = prj.configFile.parseFile
prj.storage = cfg["storage"].getStr
prj.storage.createDir()
prj.commands = cfg["commands"]
prj.packages = cfg["packages"]
proc help*(prj: var NiftyProject): JsonNode =
result = systemHelp.parseJson
if prj.configured:
prj.load
for k, v in prj.commands.pairs:
if v.hasKey("_syntax") and v.hasKey("_description"):
result[k] = ("""
{
"_syntax": "$1",
"_description": "$2"
}
""" % [v["_syntax"].getStr, v["_description"].getStr]).parseJson
proc save*(prj: NiftyProject) =
var o = newJObject()
o["storage"] = %prj.storage
o["commands"] = %prj.commands
o["packages"] = %prj.packages
prj.configFile.writeFile(o.pretty)
proc map*(prj: var NiftyProject, alias: string, props: var JsonNode) =
for k, v in props.mpairs:
if v == newJNull():
props.delete(k)
prj.load
if not prj.packages.hasKey alias:
notice "Adding package mapping '$1'..." % alias
prj.packages[alias] = newJObject()
prj.packages[alias]["name"] = %alias
else:
notice "Updating package mapping '$1'..." % alias
prj.packages[alias] = newJObject()
for key, val in props.pairs:
prj.packages[alias][key] = val
notice " $1: $2" % [key, $val]
prj.save
notice "Package mapping '$1' saved." % alias
proc unmap*(prj: var NiftyProject, alias: string) =
prj.load
prj.packages.delete(alias)
prj.save
notice "Package mapping '$1' removed." % alias
proc lookupCommand(prj: NiftyProject, command: string, props: seq[string], cmd: var JsonNode): bool =
if not prj.commands.hasKey command:
warn "Command '$1' not found" % command
return
var cmds = prj.commands[command]
var score = 0
# Cycle through command definitions
for key, val in cmds:
if key == "_syntax" or key == "_description":
continue
var params = key.split("+")
# Check if all params are available
var match = params.all do (x: string) -> bool:
props.contains(x)
if match and params.len > score:
score = params.len
cmd = val
return score > 0
proc execute*(prj: var NiftyProject, command, alias: string): int =
prj.load
if not prj.packages.hasKey alias:
warn "Package definition '$1' not found within $2. Nothing to do." % [alias, prj.dir]
return
notice "$1: $2" % [command, alias]
let package = prj.packages[alias]
var keys = newSeq[string](0)
for key, val in package.pairs:
keys.add key
var res: JsonNode
var cmd: string
var pwd = prj.storage
if prj.lookupCommand(command, keys, res):
cmd = res["cmd"].getStr.replace(placeholder) do (m: int, n: int, c: openArray[string]) -> string:
return package[c[0]].getStr
if res.hasKey("pwd"):
pwd = res["pwd"].getStr.replace(placeholder) do (m: int, n: int, c: openArray[string]) -> string:
return package[c[0]].getStr
pwd = prj.storage/pwd
notice "Executing: $1" % cmd
pwd.createDir()
pwd.setCurrentDir()
result = execShellCmd cmd
else:
warn "Command '$1' not available for package '$2'" % [command, alias]
setCurrentDir(prj.dir)
proc executeRec*(prj: var NiftyProject, command, alias: string) =
let pwd = getCurrentDir();
if (execute(prj, command, alias) != 0):
return
var childProj = newNiftyProject(pwd/prj.storage/alias)
if childProj.configured:
childProj.load()
setCurrentDir(childProj.dir)
for key, val in childProj.packages.pairs:
childProj.executeRec(command, key)
setCurrentDir(pwd)
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