timedot: more org support: dates/entries can be org headlines

Org headline prefixes (stars and space at beginning of line) are ignored.

hledger-lib/Hledger/Read/TimedotReader.hs

@@ -87,21 +87,26 @@ timedotfilep :: JournalParser m ParsedJournal
 timedotfilep = do many timedotfileitemp
                   eof
                   get
-    where
+
 timedotfileitemp :: JournalParser m ()
 timedotfileitemp = do
   traceparse "timedotfileitemp"
   choice [
-          void $ lift emptyorcommentlinep
-         ,timedotdayp >>= \ts -> modify' (addTransactions ts)
+    try $ void $ lift emptyorcommentlinep'
+   ,try timedotdayp >>= \ts -> modify' (addTransactions ts)
+   ,lift $ skipSome anySingle >> eolof  -- an initial line not beginning with a date, ignore
    ] <?> "timedot day entry, or default year or comment line or blank line"
 
 addTransactions :: [Transaction] -> Journal -> Journal
 addTransactions ts j = foldl' (flip ($)) j (map addTransaction ts)
 
+emptyorcommentlinep' = optional orgheadingprefixp >> emptyorcommentlinep
+
+orgheadingprefixp = skipSome (char '*') >> skipSome spacenonewline
+
 -- | Parse timedot day entries to zero or more time transactions for that day.
 -- @
--- 2/1
+-- 2020/2/1 optional day description
 -- fos.haskell  .... ..
 -- biz.research .
 -- inc.client1  .... .... .... .... .... ....
@@ -109,8 +114,9 @@ addTransactions ts j = foldl' (flip ($)) j (map addTransaction ts)
 timedotdayp :: JournalParser m [Transaction]
 timedotdayp = do
   traceparse " timedotdayp"
+  lift $ optional orgheadingprefixp
   d <- datep <* lift eolof
-  es <- catMaybes <$> many (const Nothing <$> try (lift emptyorcommentlinep) <|>
+  es <- catMaybes <$> many (const Nothing <$> try (lift emptyorcommentlinep') <|>
                             Just <$> (notFollowedBy datep >> timedotentryp))
   return $ map (\t -> t{tdate=d}) es -- <$> many timedotentryp
 
@@ -122,7 +128,7 @@ timedotentryp :: JournalParser m Transaction
 timedotentryp = do
   traceparse "  timedotentryp"
   pos <- genericSourcePos <$> getSourcePos
-  lift (skipMany spacenonewline)
+  lift $ optional $ choice [orgheadingprefixp, skipSome spacenonewline]
   a <- modifiedaccountnamep
   lift (skipMany spacenonewline)
   hours <-

hledger-lib/hledger_timedot.m4.md

@@ -22,15 +22,16 @@ so it could be used to represent dated quantities other than time.
 In the docs below we'll assume it's time.
 
 A timedot file contains a series of day entries.
-A day entry begins with a date, and is followed by category/quantity pairs, one per line.
-Dates are hledger-style [simple dates](journal.html#simple-dates) (see hledger_journal(5)).
-Categories are hledger-style account names, optionally indented.
-As in a hledger journal, there must be at least two spaces between the category (account name) and the quantity.
+A day entry begins with a non-indented hledger-style [simple date](journal.html#simple-dates) (see hledger_journal(5)).
+
+This is followed by optionally-indented timelog items for that day, one per line.
+Each timelog item is a note, usually a hledger:style:account:name representing a time category,
+followed by two or more spaces, and a quantity.
 
 Quantities can be written as:
 
-- a sequence of dots (.) representing quarter hours.
-  Spaces may optionally be used for grouping and readability.
+- time dots: a sequence of dots (.) representing quarter hours.
+  Spaces may optionally be used for grouping.
   Eg: .... ..
 
 - an integral or decimal number, representing hours.
@@ -43,8 +44,21 @@ Quantities can be written as:
   The following equivalencies are assumed, currently:
   1m = 60s, 1h = 60m, 1d = 24h, 1w = 7d, 1mo = 30d, 1y=365d.
 
-Blank lines and lines beginning with #, ; or * are ignored.
-An example:
+There is some flexibility allowing notes and todo lists to be kept
+right in the time log, if needed:
+
+- Blank lines and lines beginning with `#` or `;` are ignored.
+
+- Lines not ending with a double-space and quantity are parsed as
+  items taking no time, which will not appear in balance reports by
+  default. (Add -E to see them.)
+
+- Org headline prefixes (stars followed by at least one space, at the
+  start of a line) are ignored, so a timedot file can also be an org
+  outline. Emacs org mode users can use these to add structure and
+  control which parts of the file are visible.
+
+Examples:
 
 ```timedot
 # on this day, 6h was spent on client work, 1.5h on haskell FOSS work, etc.
@@ -58,8 +72,6 @@ inc:client1   .... ....
 biz:research  .
 ```
 
-Or with numbers:
-
 ```timedot
 2016/2/3
 inc:client1   4
@@ -67,6 +79,30 @@ fos:hledger   3
 biz:research  1
 ```
 
+```timedot
+* Time log
+** 2020-01-01
+*** adm:time  .
+*** adm:finance  .
+```
+
+```timedot
+** 2020-02-29
+*** DONE
+0700 yoga
+*** UNPLANNED
+*** BEGUN
+hom:chores
+ cleaning  ...
+ water plants
+  outdoor - one full watering can
+  indoor - light watering
+*** TODO
+adm:planning: trip
+*** LATER
+
+```
+
 Reporting:
 
 ```shell

tests/timedot.test

@@ -16,3 +16,14 @@ $ hledger -f- print
 
 >=0
 
+# 2. Org mode headline prefixes are ignored.
+<
+* 2020-01-01
+** a:aa  1
+
+$ hledger -f- print
+2020-01-01 *
+    (a:aa)            1.00
+
+>=0
+