Preliminary support for automatic indentation.

This assumes that the only indented lines are legs of a transaction.
It works best if you put blank lines between transactions.
If you do not use blank lines to end a transaction, it will usually work
anyway, since it forces any line starting with a date to be all the way
left.

1 files changed, 26 insertions, 0 deletions

diff --git a/indent/beancount.vim b/indent/beancount.vim
new file mode 100644
index 0000000..da8fed2
--- /dev/null
+++ b/indent/beancount.vim
@@ -0,0 +1,26 @@
+if exists("b:did_indent")
+    finish
+endif
+let b:did_indent = 1
+
+setlocal indentexpr=GetBeancountIndent(v:lnum)
+
+if exists("*GetBeancountIndent")
+    finish
+endif
+
+function GetBeancountIndent(line_num)
+    let this_line = getline(a:line_num)
+    let prev_line = getline(a:line_num - 1)
+    " This is a new directive or previous line is blank.
+    echom this_line
+    echom prev_line
+    if this_line =~ '\v^\s*\d{4}-\d{2}-\d{2}' || prev_line =~ '^\s*$'
+        return 0
+    endif
+    " Previous line is the beginning of a transaction.
+    if prev_line =~ '\v^\s*\d{4}-\d{2}-\d{2}\s+(txn\s+)?.\s+'
+        return &shiftwidth
+    endif
+    return -1
+endfunction