Merge pull request #1011 from rstudio/joe/feature/better-errors

Better errors

.Rbuildignore

@@ -6,6 +6,7 @@
 ^shiny\.cmd$
 ^run\.R$
 ^\.gitignore$
+^smoketests$
 ^res$
 ^man-roxygen$
 ^\.travis\.yml$
@@ -14,3 +15,4 @@
 ^srcjs$
 ^CONTRIBUTING.md$
 ^cran-comments.md$
+^.*\.o$

DESCRIPTION

@@ -88,6 +88,7 @@ Collate:
     'bootstrap-layout.R'
     'map.R'
     'globals.R'
+    'conditions.R'
     'utils.R'
     'bootstrap.R'
     'cache.R'

NAMESPACE

@@ -25,6 +25,9 @@ S3method(names,reactivevalues)
 S3method(print,reactive)
 S3method(print,shiny.appobj)
 S3method(str,reactivevalues)
+export("conditionStackTrace<-")
+export(..stacktraceoff..)
+export(..stacktraceon..)
 export(HTML)
 export(NS)
 export(Progress)
@@ -41,11 +44,13 @@ export(br)
 export(brushOpts)
 export(brushedPoints)
 export(callModule)
+export(captureStackTraces)
 export(checkboxGroupInput)
 export(checkboxInput)
 export(clickOpts)
 export(code)
 export(column)
+export(conditionStackTrace)
 export(conditionalPanel)
 export(createWebDependency)
 export(dataTableOutput)
@@ -59,13 +64,15 @@ export(downloadLink)
 export(em)
 export(eventReactive)
 export(exprToFunction)
+export(extractStackTrace)
 export(fileInput)
 export(fixedPage)
 export(fixedPanel)
 export(fixedRow)
 export(flowLayout)
 export(fluidPage)
 export(fluidRow)
+export(formatStackTrace)
 export(getDefaultReactiveDomain)
 export(h1)
 export(h2)
@@ -122,6 +129,8 @@ export(passwordInput)
 export(plotOutput)
 export(plotPNG)
 export(pre)
+export(printError)
+export(printStackTrace)
 export(radioButtons)
 export(reactive)
 export(reactiveFileReader)
@@ -200,6 +209,7 @@ export(validateCssUnit)
 export(verbatimTextOutput)
 export(verticalLayout)
 export(wellPanel)
+export(withLogErrors)
 export(withMathJax)
 export(withProgress)
 export(withReactiveDomain)

NEWS

@@ -40,6 +40,13 @@ shiny 0.12.2.9000
   reload whenever Shiny app files change on disk. This is intended to shorten
   the feedback cycle when tweaking UI code.
 
+* Errors are now printed with stack traces! This should make it tremendously
+  easier to track down the causes of errors in Shiny. Try it by calling
+  `stop("message")` from within an output, reactive, or observer. Shiny itself
+  adds a lot of noise to the call stack, so by default, it attempts to hide all
+  but the relevant levels of the call stack. You can turn off this behavior by
+  setting `options(shiny.fullstacktrace=TRUE)` before or during app startup.
+
 shiny 0.12.2
 --------------------------------------------------------------------------------