Merge pull request #9916 from timotheecour/pr_ref_9906_errorMax

refs #9906; --errorMax:10 allows stopping after 10 errors (more robust than nim check)

compiler/commands.nim

@@ -617,6 +617,15 @@ proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
   of "run", "r":
     expectNoArg(conf, switch, arg, pass, info)
     incl(conf.globalOptions, optRun)
+  of "errormax":
+    expectArg(conf, switch, arg, pass, info)
+    conf.errorMax = block:
+      # Note: `nim check` (etc) can overwrite this.
+      # `0` is meaningless, give it a useful meaning as in clang's -ferror-limit
+      # If user doesn't set this flag and the code doesn't either, it'd
+      # have the same effect as errorMax = 1
+      let ret = parseInt(arg)
+      if ret == 0: high(int) else: ret
   of "verbosity":
     expectArg(conf, switch, arg, pass, info)
     let verbosity = parseInt(arg)

doc/advopt.txt

@@ -104,6 +104,7 @@ Advanced options:
                             value = number of processors (0 for auto-detect)
   --incremental:on|off      only recompile the changed modules (experimental!)
   --verbosity:0|1|2|3       set Nim's verbosity level (1 is default)
+  --errorMax:int            stop after n errors in semantic pass; 0 means unlimited
   --experimental:$1
                             enable experimental language feature
   -v, --version             show detailed version information