docs: Remove Markdown from configure.ac and the build instructions

Now that all use of markdown as been replaced with pandoc, drop it from
configure.ac and from the docs/ Makefile.

Instead of just deleting the markdown reference from README, adjust the line
to mention the other optional packages required for documentation.

Drop markdown from travis, but leave it in the docker containers as they get
used for stable branches as well.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>

.travis.yml

@@ -62,7 +62,6 @@ addons:
             - libnl-3-dev
             - ocaml-nox
             - libfindlib-ocaml-dev
-            - markdown
             - transfig
             - pandoc
             - gcc-arm-linux-gnueabihf

README

@@ -73,7 +73,8 @@ disabled at compile time:
       ocaml-findlib). Required to build ocaml components which
       includes the alternative ocaml xenstored.
     * cmake (if building vtpm stub domains)
-    * markdown
+    * pandoc, transfig, pod2{man,html,text} for rendering various pieces of
+      documentation into alternative formats
     * figlet (for generating the traditional Xen start of day banner)
     * systemd daemon development files
     * Development install of libnl3 (e.g., libnl-3-200,

config/Docs.mk.in

@@ -5,6 +5,5 @@ FIG2DEV             := @FIG2DEV@
 POD2MAN             := @POD2MAN@
 POD2HTML            := @POD2HTML@
 POD2TEXT            := @POD2TEXT@
-MARKDOWN            := @MARKDOWN@
 PANDOC              := @PANDOC@
 PERL                := @PERL@

docs/Makefile

@@ -11,8 +11,6 @@ MAN_SECTIONS    := 1 5 7 8
 # Documentation sources to build
 MAN-SRC-y := $(sort $(basename $(wildcard man/*.pod man/*.pandoc)))
 
-MARKDOWNSRC-y := $(sort $(shell find misc -name '*.markdown' -print))
-
 TXTSRC-y := $(sort $(shell find misc -name '*.txt' -print))
 
 PANDOCSRC-y := $(sort $(shell find designs/ features/ misc/ process/ specs/ -name '*.pandoc' -print))
@@ -23,17 +21,14 @@ $(foreach i,$(MAN_SECTIONS), \
                                    $(filter %.$(i),$(MAN-SRC-y)))))
 
 DOC_HTML := html/SUPPORT.html \
-            $(patsubst %.markdown,html/%.html,$(MARKDOWNSRC-y)) \
             $(patsubst %.pandoc,html/%.html,$(PANDOCSRC-y)) \
             $(patsubst %,html/%.html,$(MAN-SRC-y)) \
             $(patsubst %.txt,html/%.txt,$(TXTSRC-y)) \
             $(patsubst %,html/hypercall/%/index.html,$(DOC_ARCHES))
 DOC_TXT  := $(patsubst %.txt,txt/%.txt,$(TXTSRC-y)) \
-            $(patsubst %.markdown,txt/%.txt,$(MARKDOWNSRC-y)) \
             $(patsubst %.pandoc,txt/%.txt,$(PANDOCSRC-y)) \
             $(patsubst %,txt/%.txt,$(MAN-SRC-y))
-DOC_PDF  := $(patsubst %.markdown,pdf/%.pdf,$(MARKDOWNSRC-y)) \
-            $(patsubst %.pandoc,pdf/%.pdf,$(PANDOCSRC-y))
+DOC_PDF  := $(patsubst %.pandoc,pdf/%.pdf,$(PANDOCSRC-y))
 
 # Top level build targets
 .PHONY: all
@@ -181,14 +176,6 @@ uninstall: uninstall-man-pages uninstall-html
 html/index.html: $(DOC_HTML) $(CURDIR)/gen-html-index INDEX
 	$(PERL) -w -- $(CURDIR)/gen-html-index -i INDEX html $(DOC_HTML)
 
-html/%.html: %.markdown
-ifneq ($(MARKDOWN),)
-	@$(INSTALL_DIR) $(@D)
-	$(MARKDOWN) $< > $@
-else
-	@echo "markdown not installed; skipping $@"
-endif
-
 html/%.txt: %.txt
 	@$(INSTALL_DIR) $(@D)
 	$(INSTALL_DATA) $< $@
@@ -213,10 +200,6 @@ txt/%.txt: %.txt
 	@$(INSTALL_DIR) $(@D)
 	$(INSTALL_DATA) $< $@
 
-txt/%.txt: %.markdown
-	@$(INSTALL_DIR) $(@D)
-	$(INSTALL_DATA) $< $@
-
 # Metarule for generating pandoc rules.
 define GENERATE_PANDOC_RULE_RAW
 $(1): $(2)
@@ -234,9 +217,8 @@ endef
 $(eval $(call GENERATE_PANDOC_RULE,pdf,pandoc))   # pdf/%.pdf: %.pandoc
 $(eval $(call GENERATE_PANDOC_RULE,txt,pandoc))   # txt/%.txt: %.pandoc
 $(eval $(call GENERATE_PANDOC_RULE,html,pandoc))  # html/%.html: %.pandoc
-$(eval $(call GENERATE_PANDOC_RULE,pdf,markdown)) # pdf/%.pdf: %.markdown
 
-$(eval $(call GENERATE_PANDOC_RULE_RAW,html/SUPPORT.html,$(XEN_ROOT)/SUPPORT.md)) # pdf/%.pdf: %.markdown
+$(eval $(call GENERATE_PANDOC_RULE_RAW,html/SUPPORT.html,$(XEN_ROOT)/SUPPORT.md))
 
 ifeq (,$(findstring clean,$(MAKECMDGOALS)))
 $(XEN_ROOT)/config/Docs.mk:

docs/configure

@@ -588,7 +588,6 @@ ac_unique_file="misc/xen-command-line.markdown"
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 PERL
-MARKDOWN
 PANDOC
 POD2TEXT
 POD2HTML
@@ -673,7 +672,6 @@ POD2MAN
 POD2HTML
 POD2TEXT
 PANDOC
-MARKDOWN
 PERL'
 
 
@@ -1316,7 +1314,6 @@ Some influential environment variables:
   POD2HTML    Path to pod2html tool
   POD2TEXT    Path to pod2text tool
   PANDOC      Path to pandoc tool
-  MARKDOWN    Path to markdown tool
   PERL        Path to Perl parser
 
 Use these variables to override the choices made by `configure' or to help
@@ -2224,60 +2221,6 @@ fi
 
 
 
-    for ac_prog in markdown markdown_py
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_MARKDOWN+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  case $MARKDOWN in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_MARKDOWN="$MARKDOWN" # Let the user override the test with a path.
-  ;;
-  *)
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_MARKDOWN="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-  ;;
-esac
-fi
-MARKDOWN=$ac_cv_path_MARKDOWN
-if test -n "$MARKDOWN"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MARKDOWN" >&5
-$as_echo "$MARKDOWN" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$MARKDOWN" && break
-done
-
-    if ! test -x "$ac_cv_path_MARKDOWN"; then :
-
-        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: markdown is not available so some documentation won't be built" >&5
-$as_echo "$as_me: WARNING: markdown is not available so some documentation won't be built" >&2;}
-
-fi
-
-
-
 # Extract the first word of "perl", so it can be a program name with args.
 set dummy perl; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5

docs/configure.ac

@@ -25,7 +25,6 @@ AX_DOCS_TOOL_PROG([POD2MAN], [pod2man])
 AX_DOCS_TOOL_PROG([POD2HTML], [pod2html])
 AX_DOCS_TOOL_PROG([POD2TEXT], [pod2text])
 AX_DOCS_TOOL_PROG([PANDOC], [pandoc])
-AX_DOCS_TOOL_PROGS([MARKDOWN], [markdown], [markdown markdown_py])
 
 AC_ARG_VAR([PERL], [Path to Perl parser])
 AX_PATH_PROG_OR_FAIL([PERL], [perl])