treefile: Support greater than/less than versions for packages in tre…

…efile

Add a helper function for whitespace_split_packages() so that it now splits a String by whitespace only if it is not wrapped between single quotes.
This should allow RHCOS to use syntax like podman > 1.4 in the treefile.

rust/src/treefile.rs

@@ -576,10 +576,42 @@ impl TreefileExternals {
 /// array elements.
 fn whitespace_split_packages(pkgs: &[String]) -> Vec<String> {
     pkgs.iter()
-        .flat_map(|pkg| pkg.split_whitespace().map(String::from))
+        .flat_map(|element| split_whitespace_unless_quote(element).map(String::from))
         .collect()
 }
 
+// Helper for whitespace_split_packages().
+// Splits a String by whitespace unless substring is wrapped between single quotes
+// and returns split Strings in an Iterator.
+fn split_whitespace_unless_quote(element: &String) -> std::vec::IntoIter<String> {
+    let mut quoted_pkgs: Vec<String> = vec![];
+    let mut to_whitespace_split: Vec<String> = vec![];
+    let mut start_index = 0;
+    let mut looping_over_quoted_pkg = false;
+    for (i, c) in element.chars().enumerate() {
+        if c == '\'' {
+            if looping_over_quoted_pkg {
+                quoted_pkgs.push(String::from(&element[start_index..i]));
+                looping_over_quoted_pkg = false;
+            } else {
+                to_whitespace_split.push(String::from(&element[start_index..i]));
+                looping_over_quoted_pkg = true;
+            }
+            start_index = i + 1;
+        }
+        if i == element.len() - 1 {
+            to_whitespace_split.push(String::from(&element[start_index..]));
+        }
+    }
+    let mut ret: Vec<String> = vec![];
+    ret.extend(quoted_pkgs);
+    for item in to_whitespace_split.iter() {
+        ret.extend(item.split_whitespace().map(String::from));
+    }
+
+    ret.into_iter()
+}
+
 #[derive(Serialize, Deserialize, Debug, PartialEq)]
 enum BootLocation {
     #[serde(rename = "new")]

tests/compose/test-misc-tweaks.sh

@@ -10,11 +10,13 @@ treefile_append "repos" '["test-repo"]'
 # test `recommends: true` (test-basic[-unified] test the false path)
 build_rpm foobar recommends foobar-rec
 build_rpm foobar-rec
+build_rpm quuz
+build_rpm corge
 
 echo gpgcheck=0 >> yumrepo.repo
 ln "$PWD/yumrepo.repo" config/yumrepo.repo
 # the top-level manifest doesn't have any packages, so just set it
-treefile_append "packages" '["foobar"]'
+treefile_append "packages" $'["\'foobar >= 0.5\' quuz \'corge < 1.0.0\'"]'
 
 # With docs and recommends, also test multi includes
 cat > config/documentation.yaml <<'EOF'
@@ -158,6 +160,8 @@ echo "ok /tmp"
 rpm-ostree db list --repo=${repo} ${treeref} > pkglist.txt
 assert_file_has_content_literal pkglist.txt 'foobar'
 assert_file_has_content_literal pkglist.txt 'foobar-rec'
+assert_file_has_content_literal pkglist.txt 'quuz'
+assert_file_has_content_literal pkglist.txt 'corge'
 echo "ok recommends"
 
 # Test overlays/overrides
@@ -183,4 +187,4 @@ if runcompose |& tee err.txt; then
     assert_not_reached "Successfully composed with add-files for /var/lib?"
 fi
 assert_file_has_content_literal err.txt "Unsupported path in add-files: /var"
-echo "ok bad add-files"
+echo "ok bad add-files"