src/plspkg/project.nim
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import
os,
json,
logging,
strutils,
sequtils,
pegs
type
PlsProject* = object
version*: int
dir*: string
tasks*: JsonNode
targets*: JsonNode
type PlsError = ref object of ValueError
const plsTpl* = "pls.json".slurp
const systemHelp = "help.json".slurp
let systemProps = @["$$os:$1" % hostOS, "$$cpu:$1" % hostCPU]
let placeholder = peg"'{{' {[^}]+} '}}'"
proc newPlsProject*(dir: string): PlsProject =
result.dir = dir
proc configFile*(prj: PlsProject): string =
return prj.dir/"pls.json"
proc configured*(prj: PlsProject): bool =
return fileExists(prj.configFile)
proc init*(prj: var PlsProject) =
var o = parseJson(plsTpl)
prj.configFile.writeFile(o.pretty)
proc load*(prj: var PlsProject) =
if not prj.configFile.fileExists:
fatal "Project not initialized - configuration file not found."
quit(10)
let cfg = prj.configFile.parseFile
prj.version = cfg["version"].getInt
prj.tasks = cfg["tasks"]
prj.targets = cfg["targets"]
proc help*(prj: var PlsProject): JsonNode =
result = newJObject()
if prj.configured:
prj.load
for k, v in systemHelp.parseJson.pairs:
result[k] = v
for k, v in prj.tasks.pairs:
if v.hasKey("$syntax") and v.hasKey("$description"):
result[k] = ("""
{
"$$syntax": "$1",
"$$description": "$2"
}
""" % [v["$syntax"].getStr, v["$description"].getStr]).parseJson
proc save*(prj: PlsProject) =
var o = newJObject()
o["version"] = %prj.version
o["tasks"] = %prj.tasks
o["targets"] = %prj.targets
prj.configFile.writeFile(o.pretty)
proc defTarget*(prj: var PlsProject, alias: string, props: var JsonNode) =
for k, v in props.mpairs:
if v == newJNull():
props.delete(k)
if not prj.targets.hasKey alias:
notice "Adding target '$1'..." % alias
prj.targets[alias] = newJObject()
prj.targets[alias]["name"] = %alias
else:
notice "Updating target '$1'..." % alias
prj.targets[alias] = newJObject()
for key, val in props.pairs:
prj.targets[alias][key] = val
notice " $1: $2" % [key, $val]
prj.save
notice "Target '$1' saved." % alias
proc undefTarget*(prj: var PlsProject, alias: string) =
prj.targets.delete(alias)
prj.save
notice "Target '$1' removed." % alias
proc defTask*(prj: var PlsProject, alias: string, props: var JsonNode) =
for k, v in props.mpairs:
if v == newJNull():
props.delete(k):
elif v.kind == JObject:
for kk, vv in v.pairs:
if vv == newJNull():
v.delete(kk)
if not prj.tasks.hasKey alias:
notice "Adding task '$1'..." % alias
prj.tasks[alias] = newJObject()
else:
notice "Updating task '$1'..." % alias
prj.tasks[alias] = newJObject()
for key, val in props.pairs:
prj.tasks[alias][key] = val
notice " $1: $2" % [key, $val]
prj.save
notice "Task '$1' saved." % alias
proc undefTask*(prj: var PlsProject, alias: string) =
prj.load
prj.tasks.delete(alias)
prj.save
notice "Task '$1' removed." % alias
proc lookupTask(prj: PlsProject, task: string, ps: seq[string], cmd: var JsonNode): bool =
let props = ps.concat(systemProps);
if not prj.tasks.hasKey task:
warn "Task '$1' not found" % task
return
var cmds = prj.tasks[task]
var score = 0
# Cycle through task definitions
for key, val in cmds:
if key == "$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 PlsProject, task, alias: string): int {.discardable.} =
prj.load
if not prj.targets.hasKey alias:
raise PlsError(msg: "Target definition '$1' not found. Nothing to do." % [alias])
let target = prj.targets[alias]
var keys = newSeq[string](0)
for key, val in target.pairs:
keys.add key
var res: JsonNode
var cmd: string
if prj.lookupTask(task, keys, res):
cmd = res["cmd"].getStr.replace(placeholder) do (m: int, n: int, c: openArray[string]) -> string:
return target[c[0]].getStr
notice "Executing: $1" % cmd
result = execShellCmd cmd
else:
debug "Task '$1' not available for target '$2'" % [task, alias]
setCurrentDir(prj.dir)
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