fix autodep regression by #2321 (closes #2344)

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: knitr
 Type: Package
 Title: A General-Purpose Package for Dynamic Report Generation in R
-Version: 1.48.9
+Version: 1.48.10
 Authors@R: c(
     person("Yihui", "Xie", role = c("aut", "cre"), email = "[email protected]", comment = c(ORCID = "0000-0003-0645-5666")),
     person("Abhraneel", "Sarma", role = "ctb"),

NEWS.md

@@ -12,6 +12,8 @@
 
 - In-chunk references of the form `<<label>>` should not be resolved if `label` is not found in the document (thanks, @jennybc @gadenbuie, #2360).
 
+- The chunk option `autodep = TRUE` stopped working due to a regression from #2321 (thanks, @heavywatal #2344, @atusy #2377).
+
 - `asis_output()` was not passed to the `output` hook (thanks, @cderv, #2332).
 
 - Avoid partial matching of the `Date/Publication` field when generating `citation('knitr')`, otherwise R will emit a warning when `options(warnPartialMatchDollar = TRUE)` (thanks, @fkohrt, #2361).

R/block.R

@@ -341,7 +341,12 @@ eng_r = function(options) {
         objs, cache_globals(options$cache.globals, code), options$label,
         options$cache.path
       )
-      dep_auto(labels = options$label)
+      if (isTRUE(opts_knit$get('autodep.initialized'))) {
+        dep_auto(labels = options$label)
+      } else {
+        dep_auto(labels = all_labels())
+        opts_knit$set(autodep.initialized = TRUE)
+      }
     }
     if (options$cache < 3) {
       if (options$cache.rebuild || !cache.exists) block_cache(options, res.orig, objs)

R/cache.R

@@ -169,9 +169,7 @@ dep_auto = function(path = opts_chunk$get('cache.path'), labels = all_labels())
 }
 # parse objects in dependency files
 parse_objects = function(path) {
-  if (!file.exists(path)) {
-    warning('file ', path, ' not found'); return()
-  }
+  if (!file.exists(path)) return()
   lines = strsplit(read_utf8(path), '\t')
   if (length(lines) < 2L) return()  # impossible for dependson
   objs = lapply(lines, `[`, -1L)

tests/testit/test-cache.R

@@ -1,5 +1,9 @@
 library(testit)
 
+dep_list$restore()
+knit_code$restore()
+
+
 assert('find_symbols() identifies all symbols', {
   (find_symbols('x = x + 1; rnorm(1, std = z)') %==% c('x', 'rnorm', 'z'))
 })
@@ -30,3 +34,78 @@ assert('dep_prev() sets dependencies on previous chunks', {
 })
 dep_list$restore()
 knit_code$restore()
+
+assert('dep_auto() solves dependencies', {
+  # dependency is empty now
+  (dep_list$get() %==% list())
+
+  # base rmd text
+  rmd0 = c(
+    '```{r, autodep=TRUE, cache=TRUE}',
+    'x = %s',
+    '```',
+    '```{r, autodep=TRUE, cache=TRUE}',
+    'print(x)',
+    '```'
+  )
+
+  td = tempfile()
+  dir.create(td, showWarnings = FALSE, recursive = TRUE)
+
+  rmd1 = sprintf(rmd0, 'runif(1)')
+  rmd2 = sprintf(rmd0, '"a"')
+
+  # without child document
+  in_dir(td, {
+    # with cache, the result should reproduce
+    knit1 = knit(text = rmd1, quiet = TRUE)
+    (knit(text = rmd1, quiet = TRUE) %==% knit1)
+
+    # on updating `x`, the printed result should change
+    knit2 = knit(text = rmd2, quiet = TRUE)
+    print2 = gsub('\n.*', '', gsub('.*\n##', '##', knit2))
+    (print2 %==% '## [1] "a"')
+  })
+})
+dep_list$restore()
+knit_code$restore()
+
+assert('dep_auto() solves dependencies of child documents', {
+  # dependency is empty now
+  (dep_list$get() %==% list())
+
+  # base rmd text
+  rmd0 = c(
+    '```{r, autodep=TRUE, cache=TRUE}',
+    'x = %s',
+    '```',
+    '```{r, autodep=TRUE, cache=TRUE}',
+    'print(x)',
+    '```'
+  )
+  rmd1 = sprintf(rmd0, 'runif(1)')
+  rmd2 = sprintf(rmd0, '"a"')
+
+  td = tempfile()
+  dir.create(td, showWarnings = FALSE, recursive = TRUE)
+
+  # with child document
+  parent = c(
+    '```{r, child="child.Rmd"}',
+    '```'
+  )
+  in_dir(td, {
+    # with cache, the result should reproduce
+    writeLines(rmd1, 'child.Rmd')
+    knit1 = knit(text = parent, quiet = TRUE)
+    (knit(text = parent, quiet = TRUE) %==% knit1)
+
+    # on updating `x`, the printed result should change
+    writeLines(rmd2, 'child.Rmd')
+    knit2 = knit(text = parent, quiet = TRUE)
+    print2 = gsub('\n.*', '', gsub('.*\n##', '##', knit2))
+    (print2 %==% '## [1] "a"')
+  })
+})
+dep_list$restore()
+knit_code$restore()