;bin: add hledger-dc & hledger-timedothm, based on today's #hledger chats

Examples of preprocessing input and postprocessing output
to test new input syntax or output formats.

bin/README.md

@@ -312,6 +312,16 @@ $ hledger pijul status
 $ hledger pijul record [MSG]
 ```
 
+### hledger-dc
+
+[`hledger-dc`](https://github.com/simonmichael/hledger/blob/master/bin/hledger-dc)
+reads journal files which use a Dr/Cr notation instead of/in addition to amount signs:
+```journal
+2025-01-01 salary
+    Cr revenues            800 USD
+    Dr assets
+```
+
 ### hledger-edit
 
 The [hledger-utils python package](https://pypi.org/project/hledger-utils/) provides
@@ -375,6 +385,26 @@ $ hledger lots list
 [hledger-report1.sh](https://github.com/simonmichael/hledger/blob/master/bin/hledger-report1.sh)
 is a custom compound report done in shell. See also hledger-report1.hs.
 
+### hledger-timedothm
+
+[`hledger-timedothm`](https://github.com/simonmichael/hledger/blob/master/bin/hledger-timedothm)
+reads timedot files which support HOURS:MINUTES notation:
+```timedot
+2025-09-27
+time  ..
+time  0.5
+time  30m
+time  0:30  ; new H:M syntax
+```
+and it displays amounts in that notation:
+```cli
+$ hledger timedothm sample.timedothm reg -w80
+2025-09-27                      (time)                        0:30          0:30
+                                (time)                        0:30          1:00
+                                (time)                        0:30          1:30
+                                (time)                        0:30          2:00
+```
+
 
 ## hledger haskell scripts
 

bin/hledger-dc

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+# hledger-dc JOURNALFILE CMD [ARGS]
+#  run a hledger command on a journal file which also supports Dr/Cr before the account name,
+#  instead of/in addition to amount signs.
+
+# If a posting begins with Dr<WHITESPACE>, remove that.
+# If it begins with Cr<WHITESPACE> and contains no number, remove that.
+# If it begins with Cr<WHITESPACE>, remove that and add a minus sign before the next number, and if that leaves a double minus, cancel those out.
+dc2sign() { sed -E -e 's/^(\s+)Dr\s+/\1/' -e 's/^(\s+)Cr\s+([^0-9]+)$/\1\2/' -e 's/^(\s+)Cr\s+([^0-9]+)([0-9])/\1\2-\3/' -e 's/--([0-9])/\1/'; }
+
+dc2sign <"$1" | hledger -f- "${@:2}"
+
+
+# Example:
+#
+# $ cat sample.journaldc 
+# 2025-01-01 salary
+#     Cr revenues            800 USD
+#     Dr assets
+
+# $ hledger -f sample.journaldc print
+# 2025-01-01 salary
+#     Cr revenues         800 USD
+#     Dr assets
+
+# $ hledger dc sample.journaldc print
+# 2025-01-01 salary
+#     revenues        -800 USD
+#     assets
+

bin/hledger-timedothm

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# hledger-timedothm TIMEDOTHMFILE CMD [ARGS]
+#  run a hledger command on a timedot file which also supports H:M syntax,
+#  and report all time amounts in H:M format.
+
+# convert H:M to decimal numbers
+hm2dec() { perl -pe 's#(\d+):(\d{2})#sprintf("%.2f", $1 + ($2 / 60))#ge'; }
+
+# convert decimal numbers to H:M
+dec2hm() { perl -pe 's/(\d+\.\d+)/sprintf("%d:%02d", int($1), ($1 - int($1)) * 60 + 0.5)/ge'; }
+
+hm2dec <"$1" | hledger -f timedot:- "${@:2}" | dec2hm
+
+
+# Example:
+#
+# $ cat sample.timedothm
+# 2025-09-27
+# time  ..
+# time  0.5
+# time  30m
+# time  0:30  ; new H:M syntax
+#
+# $ hledger timedothm sample.timedothm reg -w80
+# 2025-09-27                      (time)                        0:30          0:30
+#                                 (time)                        0:30          1:00
+#                                 (time)                        0:30          1:30
+#                                 (time)                        0:30          2:00