2 * Copyright (C) 2019 Richard W.M. Jones
3 * Copyright (C) 2019 Red Hat Inc.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 let rec run_targets env exprs =
25 List.iter (run_target env) exprs
27 and run_target env = function
28 | Ast.EGoalDefn _ | Ast.ETacticDefn _ -> assert false
31 | Ast.ECallGoal (loc, name, args) ->
32 let goal = Ast.getgoal env loc name in
33 run_goal env loc name args goal []
36 | Ast.ETacticCtor (loc, name, args) ->
37 (* All parameters of tactics must be simple constant expressions
38 * (strings, in future booleans, numbers, etc).
40 let args = List.map (Eval.to_constant env) args in
41 run_tactic env loc name args
43 (* If this is a goal then it's the same as calling goal(). If not
44 * then look up the variable and substitute it.
46 | Ast.EVar (loc, name) ->
47 let expr = Ast.getvar env loc name in
49 | EGoalDefn (loc, ([], _, _, _)) ->
50 run_target env (Ast.ECallGoal (loc, name, []))
52 failwithf "%a: cannot call %s() since this goal has parameters"
53 Ast.string_loc loc name
58 (* Lists are inlined when found as a target. *)
59 | Ast.EList (loc, exprs) ->
62 (* A string (with or without substitutions) implies *file(filename). *)
63 | Ast.ESubsts (loc, str) ->
64 let str = Eval.substitute env loc str in
65 run_tactic env loc "*file" [Ast.CString str]
67 | Ast.EConstant (loc, c) ->
68 run_tactic env loc "*file" [c]
70 (* Run a goal by name. *)
71 and run_goal env loc name args (params, patterns, deps, code) extra_deps =
72 (* This is used to print the goal in debug and error messages only. *)
74 sprintf "%s (%s)" name
75 (String.concat ", " (List.map (Ast.string_expr ()) args)) in
76 Cmdline.debug "%a: running goal %s" Ast.string_loc loc debug_goal;
78 (* This is the point where we evaluate the goal arguments. We must
79 * do this before creating the new environment, because variables
80 * appearing in goal arguments don't refer to goal parameters.
82 let args = List.map (Eval.evaluate_goal_arg env) args in
84 (* Create a new environment which maps the parameter names to
89 try List.combine params args
90 with Invalid_argument _ ->
91 failwithf "%a: calling goal %s with wrong number of arguments, expecting %d args but got %d args"
92 Ast.string_loc loc debug_goal
93 (List.length params) (List.length args) in
94 List.fold_left (fun env (k, v) -> Ast.Env.add k v env) env params in
96 (* Check all dependencies have been updated. *)
97 run_targets env (deps @ extra_deps);
99 (* Check if any target (ie. pattern) needs to be rebuilt.
100 * As with make, a goal with no targets is always run.
104 List.exists (needs_rebuild env loc deps extra_deps) patterns in
107 (* Run the code (if any). *)
109 | None -> () (* No { CODE } section. *)
112 (* Add some standard variables to the environment. *)
113 let expr_of_substs s = Ast.ESubsts (Ast.noloc, s) in
114 let expr_of_pattern = function
115 | Ast.PTactic (loc, tactic, targs) ->
116 Ast.ETacticCtor (loc, tactic, List.map expr_of_substs targs)
118 let pexprs = List.map expr_of_pattern patterns in
119 let env = Ast.Env.add "@" (Ast.EList (Ast.noloc, pexprs)) env in
120 let env = Ast.Env.add "<" (Ast.EList (Ast.noloc, deps)) env in
122 (* NB: extra_deps are not added to %^ *)
125 | d :: _ -> Ast.Env.add "^" d env in
126 let code = Eval.to_shell_script env loc code in
127 let code = "set -e\nset -x\n\n" ^ code in
128 let r = Sys.command code in
130 eprintf "*** goal ‘%s’ failed with exit code %d\n" name r;
134 (* Check all targets were updated after the code was
135 * run (else it's an error).
137 let pattern_still_needs_rebuild =
139 Some (List.find (needs_rebuild env loc deps extra_deps) patterns)
142 match pattern_still_needs_rebuild with
145 failwithf "%a: goal %s ran successfully but it did not rebuild %a"
146 Ast.string_loc loc debug_goal Ast.string_pattern pattern
150 (* Return whether the target (pattern) needs to be rebuilt. *)
151 and needs_rebuild env loc deps extra_deps pattern =
152 Cmdline.debug "%a: testing if %a needs rebuild"
153 Ast.string_loc loc Ast.string_pattern pattern;
156 | Ast.PTactic (loc, tactic, targs) ->
157 (* Look up the tactic. *)
158 let params, code = Ast.gettactic env loc tactic in
160 (* Resolve the targs down to constants. Since needs_rebuild
161 * should be called with env containing the goal params, this
162 * should substitute any parameters in the tactic arguments.
164 let targs = List.map (Ast.substitute env loc) targs in
166 List.map (fun targ ->
167 Ast.EConstant (Ast.noloc, Ast.CString targ)) targs in
169 (* Create a new environment binding parameter names
174 try List.combine params targs
175 with Invalid_argument _ ->
176 failwithf "%a: calling tactic ‘%s’ with wrong number of arguments"
177 Ast.string_loc loc tactic in
178 List.fold_left (fun env (k, v) -> Ast.Env.add k v env) env params in
180 (* Add some standard variables to the environment. *)
181 let env = Ast.Env.add "<" (Ast.EList (Ast.noloc, deps)) env in
183 (* NB: extra_deps are not added to %^ *)
186 | d :: _ -> Ast.Env.add "^" d env in
187 let code = Eval.to_shell_script env loc code in
188 let code = "set -e\n" (*^ "set -x\n" *) ^ "\n" ^ code in
189 let r = Sys.command code in
190 if r = 99 (* means "needs rebuild" *) then true
191 else if r = 0 (* means "doesn't need rebuild" *) then false
193 eprintf "*** tactic ‘%s’ failed with exit code %d\n" tactic r;
197 (* Find the goal which matches the given tactic and run it.
198 * cargs is a list of parameters (all constants).
200 and run_tactic env loc tactic cargs =
201 (* This is used to print the tactic in debug and error messages only. *)
204 (Ast.ETacticCtor (loc, tactic,
205 List.map (fun c -> Ast.EConstant (loc, c)) cargs)) in
206 Cmdline.debug "%a: running tactic %s" Ast.string_loc loc debug_tactic;
208 (* Find all goals in the environment. Returns a list of (name, goal). *)
210 let env = Ast.Env.bindings env in
213 | name, Ast.EGoalDefn (loc, goal) -> Some (name, goal)
216 (* Find all patterns. Returns a list of (pattern, name, goal). *)
217 let patterns : (Ast.pattern * Ast.id * Ast.goal) list =
219 (List.map (fun (name, ((_, patterns, _, _) as goal)) ->
220 List.map (fun pattern -> (pattern, name, goal)) patterns) goals) in
222 (* Find any patterns (ie. tactics) which match the one we
223 * are searching for. This returns a binding for the goal args,
224 * so we end up with a list of (pattern, name, goal, args).
226 let patterns : (Ast.pattern * Ast.id * Ast.goal * Ast.expr list) list =
228 fun (pattern, name, ((params, _, _, _) as goal)) ->
229 match matching_pattern env loc tactic cargs pattern params with
231 | Some args -> Some (pattern, name, goal, args)
236 (* There's no matching goal, but we don't need one if
237 * the tactic doesn't need to be rebuilt.
239 let targs = List.map (function Ast.CString s -> [Ast.SString s]) cargs in
240 let p = Ast.PTactic (loc, tactic, targs) in
241 if needs_rebuild env loc [] [] p then
242 failwithf "%a: don't know how to build %s"
243 Ast.string_loc loc debug_tactic
245 | [_, name, goal, args] ->
246 (* Single goal matches, run it. *)
247 run_goal env loc name args goal []
250 (* Two or more goals match. Only one must have a CODE section,
251 * and we combine the dependencies into a "supergoal".
253 let with_code, without_code =
255 fun (_, _, (_, _, _, code), _) -> code <> None
258 let (_, name, goal, args), extra_deps =
263 List.map (fun (_, _, (_, _, deps, _), _) -> deps) without_code
268 (* This is OK, it means we'll rebuild all dependencies
269 * but there is no code to run. Pick the first goal
270 * without code and the dependencies from the other goals.
272 let g = List.hd without_code in
275 List.map (fun (_, _, (_, _, deps, _), _) -> deps)
276 (List.tl without_code)
281 failwithf "%a: multiple goals found which match tactic %s, but more than one of these goals have {code} sections which is not allowed"
282 Ast.string_loc loc debug_tactic in
284 run_goal env loc name args goal extra_deps
286 (* Test if pattern matches *tactic(cargs). If it does
287 * then we return Some args where args is the arguments that must
288 * be passed to the matching goal. The params parameter is
289 * the names of the parameters of that goal.
291 and matching_pattern env loc tactic cargs pattern params =
293 | Ast.PTactic (loc, ttactic, targs)
294 when tactic <> ttactic ||
295 List.length cargs <> List.length targs ->
296 None (* Can't possibly match if tactic name or #args is different. *)
297 | Ast.PTactic (loc, ttactic, targs) ->
298 (* Do the args match with a possible params binding? *)
299 try Some (matching_params env loc params targs cargs)
300 with Not_found -> None
302 (* Return a possible binding. For example the goal is:
303 * goal compile (name) = "%name.o": "%name.c" {}
304 * which means that params = ["name"] and targs = ["%name.o"].
306 * If we are called with cargs = ["file1.o"], we would
309 * On non-matching this raises Not_found.
311 and matching_params env loc params targs cargs =
312 (* This is going to record the resulting binding. *)
313 let res = ref Ast.Env.empty in
314 List.iter2 (matching_param env loc params res) targs cargs;
316 (* Rearrange the result into goal parameter order. Also this
317 * checks that every parameter got a binding.
321 (* Allow the Not_found exception to escape if no binding for this param. *)
322 fun param -> Ast.Env.find param res
325 (* If targ = "%name.o" and carg = "file.o" then this would set
326 * name => "file" in !res. If they don't match, raises Not_found.
328 and matching_param env loc params res targ carg =
330 | Ast.CString carg ->
331 (* Substitute any non parameters in targ from the environment. *)
335 | Ast.SString _ as s -> s
337 if not (List.mem name params) then (
339 let expr = Ast.getvar env loc name in
340 match Eval.to_constant env expr with
341 | Ast.CString s -> Ast.SString s
342 with Failure _ -> raise Not_found
348 (* Do the actual pattern matching. Any remaining SVar elements
349 * must refer to goal parameters.
351 let carg = ref carg in
352 let rec loop = function
354 (* End of targ, we must have matched all of carg. *)
355 if !carg <> "" then raise Not_found
356 | Ast.SString s :: rest ->
357 (* Does this match the first part of !carg? *)
358 let clen = String.length !carg in
359 let slen = String.length s in
360 if slen > clen || s <> String.sub !carg 0 slen then
362 (* Yes, so continue after the matching prefix. *)
363 carg := String.sub !carg slen (clen-slen);
365 | Ast.SVar name :: Ast.SString s :: rest ->
366 (* This is a goal parameter. Find s later in !carg. *)
367 let i = string_find !carg s in
368 if i = -1 then raise Not_found;
369 (* Set the binding in !res. *)
370 let r = Ast.EConstant (Ast.noloc,
371 Ast.CString (String.sub !carg 0 i)) in
372 res := Ast.Env.add name r !res;
373 (* Continue after the match. *)
374 let skip = i + String.length s in
375 carg := String.sub !carg skip (String.length !carg - skip);
377 | Ast.SVar name :: [] ->
378 (* Matches the whole remainder of the string. *)
379 let r = Ast.EConstant (Ast.noloc, Ast.CString !carg) in
380 res := Ast.Env.add name r !res
381 | Ast.SVar x :: Ast.SVar y :: _ ->
382 (* TODO! We cannot match a target like "%x%y". *)