patch 8.1.1510: a plugin cannot easily expand a command like done internally
Problem: A plugin cannot easily expand a command like done internally.
Solution: Add the expandcmd() function. (Yegappan Lakshmanan, closes #4514)
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index d1f6824..b5df67c 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -2326,6 +2326,7 @@
exp({expr}) Float exponential of {expr}
expand({expr} [, {nosuf} [, {list}]])
any expand special keywords in {expr}
+expandcmd({expr}) String expand {expr} like with `:edit`
feedkeys({string} [, {mode}]) Number add key sequence to typeahead buffer
filereadable({file}) Number |TRUE| if {file} is a readable file
filewritable({file}) Number |TRUE| if {file} is a writable file
@@ -4218,6 +4219,14 @@
See |glob()| for finding existing files. See |system()| for
getting the raw output of an external command.
+expandcmd({expr}) *expandcmd()*
+ Expand special items in {expr} like what is done for an Ex
+ command such as `:edit`. This expands special keywords, like
+ with |expand()|, and environment variables, anywhere in
+ {expr}. Returns the expanded string.
+ Example: >
+ :echo expandcmd('make %<.o')
+<
extend({expr1}, {expr2} [, {expr3}]) *extend()*
{expr1} and {expr2} must be both |Lists| or both
|Dictionaries|.