115 lines
4.4 KiB
Plaintext
115 lines
4.4 KiB
Plaintext
#!/usr/bin/env nomsu -V4.10.12.7
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#
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This file contains code for defining ways to upgrade code between different versions
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of Nomsu.
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use "lib/os.nom"
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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%UPGRADES = {}
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externally (upgrade to %version via %upgrade_fn) means:
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%UPGRADES.%version = %upgrade_fn
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%ACTION_UPGRADES = ({} with fallback % -> {})
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externally (upgrade action %stub to %version via %upgrade_fn) means:
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%ACTION_UPGRADES.%version.%stub = %upgrade_fn
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(upgrade %tree to %version as %body) parses as (..)
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upgrade to %version via ([%, %end_version] -> (% with %tree -> %body))
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(upgrade action %actions to %version as %body) compiles to:
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if (%actions is "Action" syntax tree):
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%actions = \[%actions]
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%lua = (Lua "")
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for %action in %actions:
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%replacements = {}
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for %i in 1 to (size of %action):
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if (%action.%i.type is "Var"):
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%replacements.(%action.%i.1) = "\(\%tree as lua id)[\%i]"
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define mangler
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(make tree %t) means:
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when:
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(%t is "Var" syntax tree):
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if %replacements.(%t.1):
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return %replacements.(%t.1)
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..else:
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external %needs_mangle = (yes)
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return "SyntaxTree{type=\(quote %t.type), source=\(quote "\(%t.source)"), \(quote (mangle %t.1))}"
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(%t is syntax tree):
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%args = []
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for %k = %v in %t:
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if ((type of %k) == "number"):
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%args::add (make tree %v)
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..else:
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%args::add "\(%k)=\(make tree %v)"
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return "SyntaxTree{\(%args::joined with ", ")}"
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else:
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return (quote %t)
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unless ("\%lua" == ""):
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%lua::append "\n"
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%retval = (make tree %body)
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%lua::append (..)
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Lua "\
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..upgrade_action_1_to_2_via(\(quote %action.stub), \(%version as lua expr), function(\(\%tree as lua id))
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return \%retval
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end)"
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return %lua
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externally [..]
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%tree upgraded from %start_version to %end_version
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%tree upgraded to %end_version from %start_version
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..all mean:
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unless (%tree is syntax tree): return %tree
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(%ver as list) means ((% as number) for % in %ver matching "[0-9]+")
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%versions = {}
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for %v = % in %UPGRADES:
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%versions.%v = (yes)
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for %v = % in %ACTION_UPGRADES:
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%versions.%v = (yes)
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%versions = ((keys in %versions) sorted by % -> (% as list))
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for %ver in %versions:
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if ((%ver as list) <= (%start_version as list)): do next %ver
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if ((%ver as list) > (%end_version as list)): stop %ver
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if %ACTION_UPGRADES.%ver:
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%tree = (..)
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%tree with % ->:
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if ((% is "Action" syntax tree) and %ACTION_UPGRADES.%ver.(%.stub)):
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%with_upgraded_args = {..}
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: for %k = %v in %: add %k = (%v upgraded from %start_version to %end_version)
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set %with_upgraded_args's metatable to (%'s metatable)
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return (%ACTION_UPGRADES.%ver.(%.stub) %with_upgraded_args %end_version)
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if %UPGRADES.%ver:
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%with_upgraded_args = {..}
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:
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for %k = %v in %tree:
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add %k = (%v upgraded from %start_version to %end_version)
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set %with_upgraded_args's metatable to (%tree's metatable)
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%tree = (call %UPGRADES.%ver with [%with_upgraded_args, %end_version])
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%tree.shebang = "#!/usr/bin/env nomsu -V\%end_version"
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return %tree
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externally (%tree upgraded from %start_version) means (..)
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%tree upgraded from %start_version to (Nomsu version)
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externally (%tree upgraded to %end_version) means (..)
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%tree upgraded from (%tree.version or (Nomsu version)) to %end_version
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externally (%tree upgraded) means (..)
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%tree upgraded from (%tree.version or (Nomsu version)) to (Nomsu version)
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externally (use %path from version %version) means:
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for file %filename in %path:
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if (=lua "LOADED[\%filename]"):
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do next %filename
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%file = (read file %filename)
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%tree = (parse %file from %filename)
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%tree = (upgrade %tree from %version)
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run tree %tree
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