Add --input-dir and --output-dir as options (#119)

All filese from --input-dir will be processed as templates and stored
with the same directory hierachy in --ouput-dir

- Use both options when a whole directory hierarchy needs to be processed.
- Extracted file processing logic in an extra process.go
- --output-dir is optional and default to "."
- --output-dir is created automatically if not existing

Fixes #117

Signed-off-by: Roland Huss <roland@ro14nd.de>

4 files changed, 73 insertions, 0 deletions

diff --git a/test/files/input-dir/config.yml b/test/files/input-dir/config.yml
new file mode 100644
index 00000000..1ec99548
--- /dev/null
+++ b/test/files/input-dir/config.yml
@@ -0,0 +1,2 @@
+one: eins
+two: zwei
diff --git a/test/files/input-dir/in/inner/nested.txt b/test/files/input-dir/in/inner/nested.txt
new file mode 100644
index 00000000..55e06b79
--- /dev/null
+++ b/test/files/input-dir/in/inner/nested.txt
@@ -0,0 +1 @@
+{{ (datasource "config").two }}
\ No newline at end of file
diff --git a/test/files/input-dir/in/top.txt b/test/files/input-dir/in/top.txt
new file mode 100644
index 00000000..9069510b
--- /dev/null
+++ b/test/files/input-dir/in/top.txt
@@ -0,0 +1 @@
+{{ (datasource "config").one }}
\ No newline at end of file
diff --git a/test/integration/input-dir.bats b/test/integration/input-dir.bats
new file mode 100644
index 00000000..72667a29
--- /dev/null
+++ b/test/integration/input-dir.bats
@@ -0,0 +1,69 @@
+#!/usr/bin/env bats
+
+load helper
+
+tmpdir=$(mktemp -u)
+
+function setup () {
+  mkdir -p $tmpdir
+  mkdir -p $tmpdir/in/inner
+  echo -n "{{ (datasource \"config\").one }}" > $tmpdir/in/eins.txt
+  echo -n "{{ (datasource \"config\").two }}" > $tmpdir/in/inner/deux.txt
+
+  cat <<"EOT"  > $tmpdir/config.yml
+one: eins
+two: deux
+EOT
+}
+
+function teardown () {
+  # rm -rf $tmpdir
+  echo
+}
+
+@test "takes --input-dir and produces proper output files" {
+  rm -rf $tmpdir/out || true
+  gomplate --input-dir $tmpdir/in --output-dir $tmpdir/out -d config=$tmpdir/config.yml
+  [ "$status" -eq 0 ]
+  [[ "$(ls $tmpdir/out | wc -l)" == 2 ]]
+  [[ "$(ls $tmpdir/out/inner | wc -l)" == 1 ]]
+  [[ "$(cat $tmpdir/out/eins.txt)" == "eins" ]]
+  [[ "$(cat $tmpdir/out/inner/deux.txt)" == "deux" ]]
+}
+
+@test "test . as default --output-dir param" {
+  rm -rf $tmpdir/out_dot || true
+  mkdir -p $tmpdir/out_dot
+  g=$(pwd)/bin/gomplate
+  cd $tmpdir/out_dot
+  run $g --input-dir $tmpdir/in -d config=$tmpdir/config.yml
+  [ "$?" -eq 0 ]
+  [[ "$(ls | wc -l)" == 2 ]]
+  [[ "$(ls inner | wc -l)" == 1 ]]
+  [[ "$(cat eins.txt)" == "eins" ]]
+  [[ "$(cat inner/deux.txt)" == "deux" ]]
+}
+
+@test "errors given --output-dir but no --input-dir" {
+  gomplate --output-dir "."
+  [ "$status" -eq 1 ]
+  [[ "${output}" == "--input-dir must be set when --output-dir is set" ]]
+}
+
+@test "errors given both --input-dir and --in" {
+  gomplate --input-dir "." --in "param"
+  [ "$status" -eq 1 ]
+  [[ "${output}" == "--input-dir can not be used together with --in or --file" ]]
+}
+
+@test "errors given both --input-dir and --file" {
+  gomplate --input-dir "." --file input.txt
+  [ "$status" -eq 1 ]
+  [[ "${output}" == "--input-dir can not be used together with --in or --file" ]]
+}
+
+@test "errors given both --output-dir and --out" {
+  gomplate --input-dir "." --output-dir /tmp --out out
+  [ "$status" -eq 1 ]
+  [[ "${output}" == "--out can not be used together with --output-dir" ]]
+}