Persist variables to file (~/.whenjobs/variables).

[whenjobs.git] / lib / whenexpr.ml

diff --git a/lib/whenexpr.ml b/lib/whenexpr.ml
index 8ccde2c..1301e5e 100644 (file)
--- a/lib/whenexpr.ml
+++ b/lib/whenexpr.ml
@@ -41,6 +41,7 @@ type whenexpr =
   | Expr_eq of whenexpr * whenexpr
   | Expr_ge of whenexpr * whenexpr
   | Expr_gt of whenexpr * whenexpr
+  | Expr_ne of whenexpr * whenexpr
   | Expr_not of whenexpr
   | Expr_add of whenexpr * whenexpr
   | Expr_sub of whenexpr * whenexpr
@@ -106,6 +107,31 @@ let rpc_of_variable = function
 
 type variables = variable StringMap.t
 
+type preinfo = {
+  pi_job_name : string;
+  pi_serial : Big_int.big_int;
+  pi_variables : (string * variable) list;
+  pi_running : preinfo_running_job list;
+}
+and preinfo_running_job = {
+  pirun_job_name : string;
+  pirun_serial : Big_int.big_int;
+  pirun_start_time : float;
+  pirun_pid : int;
+}
+
+type result = {
+  res_job_name : string;
+  res_serial : Big_int.big_int;
+  res_code : int;
+  res_tmpdir : string;
+  res_output : string;
+  res_start_time : float;
+}
+
+type pre = preinfo -> bool
+type post = result -> unit
+
 type job_cond =
   | When_job of whenexpr
   | Every_job of periodexpr
@@ -113,6 +139,8 @@ type job_cond =
 type job = {
   job_loc : Loc.t;
   job_name : string;
+  job_pre : pre option;
+  job_post : post option;
   job_cond : job_cond;
   job_script : shell_script;
 }
@@ -185,6 +213,9 @@ and expr_of_iexpr _loc = function
   | IExpr_app (">", exprs) ->
     two_params _loc ">" exprs (fun e1 e2 -> Expr_gt (e1, e2))
 
+  | IExpr_app (("!="|"<>"), exprs) ->
+    two_params _loc "<>" exprs (fun e1 e2 -> Expr_ne (e1, e2))
+
   | IExpr_app ("!", exprs) ->
     one_param _loc "!" exprs (fun e1 -> Expr_not e1)
 
@@ -267,6 +298,8 @@ let rec string_of_whenexpr = function
     sprintf "%s >= %s" (string_of_whenexpr e1) (string_of_whenexpr e2)
   | Expr_gt (e1, e2) ->
     sprintf "%s > %s" (string_of_whenexpr e1) (string_of_whenexpr e2)
+  | Expr_ne (e1, e2) ->
+    sprintf "%s <> %s" (string_of_whenexpr e1) (string_of_whenexpr e2)
   | Expr_not e -> sprintf "! %s" (string_of_whenexpr e)
   | Expr_add (e1, e2) ->
     sprintf "%s + %s" (string_of_whenexpr e1) (string_of_whenexpr e2)
@@ -309,6 +342,7 @@ let rec dependencies_of_whenexpr = function
   | Expr_eq (e1, e2)
   | Expr_ge (e1, e2)
   | Expr_gt (e1, e2)
+  | Expr_ne (e1, e2)
   | Expr_add (e1, e2)
   | Expr_sub (e1, e2)
   | Expr_mul (e1, e2)
@@ -392,6 +426,14 @@ let rec eval_whenexpr variables prev_variables onload = function
     else
       T_bool false
 
+  | Expr_ne (e1, e2) ->
+    let e1 = eval_whenexpr variables prev_variables onload e1
+    and e2 = eval_whenexpr variables prev_variables onload e2 in
+    if compare_values e1 e2 <> 0 then
+      T_bool true
+    else
+      T_bool false
+
   | Expr_not e ->
     if not (eval_whenexpr_as_bool variables prev_variables onload e) then
       T_bool true
@@ -616,3 +658,22 @@ let next_periodexpr =
     let t0 = Date.make 1970 1 1 in
     let t' = Date.add t0 (Date.Period.month months) in
     Date.to_unixfloat t'
+
+let check_valid_variable_name name =
+  (* Don't permit certain names. *)
+  if name = "JOBSERIAL" then
+    failwith "JOBSERIAL variable cannot be set";
+
+  let len = String.length name in
+  if len = 0 then
+    failwith "variable name is an empty string";
+  if name.[0] <> '_' && not (isalpha name.[0]) then
+    failwith "variable name must start with alphabetic character or underscore";
+
+  let rec loop i =
+    if i >= len then ()
+    else if name.[i] <> '_' && not (isalnum name.[i]) then
+      failwith "variable name contains non-alphanumeric non-underscore character"
+    else loop (i+1)
+  in
+  loop 1