ICU-21078 Improve instructions and gitignore files for cldr-to-icu.
This also adds .idea/ to the top-level .gitignore, next to .vs/ and
.vscode/.
diff --git a/.gitignore b/.gitignore
index 079c1e7..4efac55 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,6 +42,7 @@
test-*.xml
# Directories
+.idea/
.vs/
.vscode/
ARM/
@@ -56,6 +57,7 @@
debug/
doc/
lib/
+!tools/cldr/lib
out/
release/
tmp/
diff --git a/tools/cldr/cldr-to-icu/.gitignore b/tools/cldr/.gitignore
similarity index 88%
rename from tools/cldr/cldr-to-icu/.gitignore
rename to tools/cldr/.gitignore
index 8d31dd9..ed5b154 100644
--- a/tools/cldr/cldr-to-icu/.gitignore
+++ b/tools/cldr/.gitignore
@@ -3,5 +3,5 @@
!/lib/README.txt
# Ignore the default Maven target directory.
-/target
+/cldr-to-icu/target
diff --git a/tools/cldr/cldr-to-icu/README.txt b/tools/cldr/cldr-to-icu/README.txt
index 750f41a..4bde0a4 100644
--- a/tools/cldr/cldr-to-icu/README.txt
+++ b/tools/cldr/cldr-to-icu/README.txt
@@ -55,12 +55,13 @@
information).
$ cd "$ICU_ROOT/tools/cldr/lib"
-$ install-cldr-jars.sh "$CLDR_ROOT"
+$ ./install-cldr-jars.sh "$CLDR_ROOT"
Generating all ICU data
-----------------------
+$ cd "$ICU_ROOT/tools/cldr/cldr-to-icu"
$ ant -f build-icu-data.xml
