Support fetching without the --progress option (#1067)

Setting the `show-progress` option to false in the `with` section of the
workflow step will cause git fetch to run without `--progress`.

The motivation is to be able to suppress the noisy progress status
output which adds many hundreds of "remote: Counting objects: 85%
(386/453)" and similar lines in the workflow log.

This should be sufficient to resolve #894 and its older friends,
though the solution is different to the one proposed there because
it doesn't use the --quiet flag. IIUC git doesn't show the progress
status by default since the output is not a terminal, so that's why
removing the --progress option is all that's needed.

Adding the --quiet flag doesn't make a lot of difference once the
--progress flag is removed, and actually I think using --quiet would
suppress some other more useful output that would be better left
visible.

Signed-off-by: Simon Baird <sbaird@redhat.com>

src/input-helper.ts

@@ -105,6 +105,11 @@ export async function getInputs(): Promise<IGitSourceSettings> {
     (core.getInput('fetch-tags') || 'false').toUpperCase() === 'TRUE'
   core.debug(`fetch tags = ${result.fetchTags}`)
 
+  // Show fetch progress
+  result.showProgress =
+    (core.getInput('show-progress') || 'true').toUpperCase() === 'TRUE'
+  core.debug(`show progress = ${result.showProgress}`)
+
   // LFS
   result.lfs = (core.getInput('lfs') || 'false').toUpperCase() === 'TRUE'
   core.debug(`lfs = ${result.lfs}`)