;shake: refactor; add _info_ m4 macro

[ci skip]

Shake.hs

@@ -260,21 +260,7 @@ main = do
       ,webmanuals
       ]
 
-    -- Generate plain text manuals suitable for embedding in
+    -- Generate nroff man pages suitable for man output, from the .m4.md source.
-    -- executables and viewing with a pager.
-    phony "txtmanuals" $ need txtmanuals
-    txtmanuals |%> \out -> do  -- hledger/hledger.txt
-      let src = manualNameToManpageName $ dropExtension out
-      need [src]
-      -- cmd Shell groff "-t -e -mandoc -Tascii" src  "| col -b >" out -- http://www.tldp.org/HOWTO/Man-Page/q10.html
-      -- Workaround: groff 1.22.4 always calls grotty in a way that adds ANSI/SGR escape codes.
-      -- (groff -c is supposed to switch those to backspaces, which we could
-      -- remove with col -b, but it doesn't as can be seen with groff -V.)
-      -- To get plain text, we run groff's lower-level commands (from -V) and add -cbuo.
-      -- -Wall silences most troff warnings, remove to see them
-      cmd Shell "tbl" src "| eqn -Tascii | troff -Wall -mandoc -Tascii | grotty -cbuo >" out
-
-    -- Generate nroff man pages suitable for man output.
     phony "nroffmanuals" $ need nroffmanuals
     nroffmanuals |%> \out -> do -- hledger/hledger.1
       let src       = manpageNameToManualName out <.> "m4.md"
@@ -294,7 +280,21 @@ main = do
         "--lua-filter tools/pandoc-drop-links.lua"
         "-o" out
 
-    -- Generate Info manuals suitable for viewing with info.
+    -- Generate plain text manuals suitable for embedding in
+    -- executables and viewing with a pager, from the man pages.
+    phony "txtmanuals" $ need txtmanuals
+    txtmanuals |%> \out -> do  -- hledger/hledger.txt
+      let src = manualNameToManpageName $ dropExtension out
+      need [src]
+      -- cmd Shell groff "-t -e -mandoc -Tascii" src  "| col -b >" out -- http://www.tldp.org/HOWTO/Man-Page/q10.html
+      -- Workaround: groff 1.22.4 always calls grotty in a way that adds ANSI/SGR escape codes.
+      -- (groff -c is supposed to switch those to backspaces, which we could
+      -- remove with col -b, but it doesn't as can be seen with groff -V.)
+      -- To get plain text, we run groff's lower-level commands (from -V) and add -cbuo.
+      -- -Wall silences most troff warnings, remove to see them
+      cmd Shell "tbl" src "| eqn -Tascii | troff -Wall -mandoc -Tascii | grotty -cbuo >" out
+
+    -- Generate Info manuals suitable for viewing with info, from the .m4.md source.
     phony "infomanuals" $ need infomanuals
     infomanuals |%> \out -> do -- hledger/hledger.info
       let src       = out -<.> "m4.md"
@@ -306,7 +306,7 @@ main = do
       need $ [src, commonm4, packagem4] ++ deps
       when (dir=="hledger") $ need commandmds
       cmd Shell
-        "m4 -P -I" dir commonm4 packagem4 src "|"
+        "m4 -P -DINFO -I" dir commonm4 packagem4 src "|"
         pandoc fromsrcmd
         "--lua-filter tools/pandoc-drop-html-blocks.lua"
         "--lua-filter tools/pandoc-drop-html-inlines.lua"

doc/common.m4

@@ -15,8 +15,14 @@ m4_define({{_author_}}, {{}})m4_dnl
 m4_dnl
 m4_dnl Macros for conditionally including format-specific content
 m4_dnl $1 is the manual's web slug: hledger, hledger-ui, journal, csv etc.
+m4_dnl include in man pages only
 m4_define({{_man_}},         m4_ifdef({{MAN}},{{$1}})             )m4_dnl
+m4_dnl include in web manuals only
 m4_define({{_web_}},         m4_ifdef({{WEB}},{{$1}})             )m4_dnl
+m4_dnl include in info manuals only
+m4_define({{_info_}},         m4_ifdef({{INFO}},{{$1}})             )m4_dnl
+m4_dnl include in text manuals only - not implemented
+m4_dnl m4_define({{_txt_}},         m4_ifdef({{TXT}},{{$1}})             )m4_dnl
 m4_dnl
 m4_dnl Links to dev and recent release versions of a manual.
 m4_dnl The actual links are inserted dynamically by site.js, static generation was much too painful.