IMPORTANT: bug fix in default data download script of download.mk

Summary of possible semantic conflicts
 1. The recipe to download input datasets has been modified. You have to
    re-set the old 'origname' variable to 'localname' (to avoid confusion)
    and the default dataset URL should now be complete (including the
    actual filename). See the newly added descriptions in 'INPUTS.conf' for
    more on this.

Until now, when the dataset was already present on the host system, a link
couldn't be made to it, causing the project to crash in the checksum
phase. This has been fixed with properly naming the main variable as
'localname' to avoid the confusion that caused it.

Some other problems have been fixed in this recipe in the meantime:
 - When the checksum is different, the expected and calculated checksums
   are printed.
 - In the default paper, we now print the full URL of the dataset, not just
   the server, so the checksum of the 'download.tex' step has been updated.

1 files changed, 14 insertions, 10 deletions

diff --git a/reproduce/analysis/make/download.mk b/reproduce/analysis/make/download.mk
index 71ee7d3..bc8b8ce 100644
--- a/reproduce/analysis/make/download.mk
+++ b/reproduce/analysis/make/download.mk
@@ -58,7 +58,7 @@ $(inputdatasets): $(indir)/%.fits: | $(indir) $(lockdir)
 
         # Set the necessary parameters for this input file.
 	if   [ $* = wfpc2 ]; then
-	  origname=$(WFPC2IMAGE); url=$(WFPC2URL); mdf=$(WFPC2MD5);
+	  localname=$(WFPC2IMAGE); url=$(WFPC2URL); mdf=$(WFPC2MD5);
 	else
 	echo; echo; echo "Not recognized input dataset: '$*.fits'."
 	echo; echo; exit 1
@@ -71,21 +71,25 @@ $(inputdatasets): $(indir)/%.fits: | $(indir) $(lockdir)
         # here points to the final file directly (note that `readlink' is
         # part of GNU Coreutils). If its not a link, the `readlink' part
         # has no effect.
-	if [ -f $(INDIR)/$$origname ]; then
-	  ln -fs $$(readlink -f $(INDIR)/$$origname) $$out
+	unchecked=$@.unchecked
+	if [ -f $(INDIR)/$$localname ]; then
+	  ln -fs $$(readlink -f $(INDIR)/$$localname) $$unchecked
 	else
 	  touch $(lockdir)/download
 	  $(downloadwrapper) "wget --no-use-server-timestamps -O" \
-	                     $(lockdir)/download $$url/$$origname $@
+	                     $(lockdir)/download $$url $$unchecked
 	fi
 
         # Check the md5 sum to see if this is the proper dataset.
-	sum=$$(md5sum $@ | awk '{print $$1}')
-	if [ $$sum != $$mdf ]; then
-	  wrongname=$(dir $@)/wrong-$(notdir $@)
-	  mv $@ $$wrongname
-	  echo; echo; echo "Wrong MD5 checksum for '$$origname' in $$wrongname"
-	  echo; echo; exit 1
+	sum=$$(md5sum $$unchecked | awk '{print $$1}')
+	if [ $$sum = $$mdf ]; then
+	  mv $$unchecked $@
+	else
+	  echo; echo;
+	  echo "Wrong MD5 checksum for input file '$$localname':"
+	  echo "  Expected MD5 checksum:   $$mdf"; \
+	  echo "  Calculated MD5 checksum: $$sum"; \
+	  echo; exit 1
 	fi