Fix word wrapping determinism on BSD / Linux

fmt behaves totally differently depending on the version and on the
OS, use fold instead that has a consistent behaviour accross platform.

Tested with bazel test //scripts/release/... on OSX and Linux.

--
MOS_MIGRATED_REVID=101567574

3 files changed, 9 insertions, 15 deletions

diff --git a/scripts/release/release_test.sh b/scripts/release/release_test.sh
index 4c2606800e..3152054825 100755
--- a/scripts/release/release_test.sh
+++ b/scripts/release/release_test.sh
@@ -195,8 +195,8 @@ EOF
   local header='Release v1 ('$(date +%Y-%m-%d)')
 
 Baseline: 1170dc6
-   + 0540fde: Extract version numbers that look like
-              "..._1.2.3_..." from BUILD_EMBED_LABEL into Info.plist.
+   + 0540fde: Extract version numbers that look like "..._1.2.3_..."
+              from BUILD_EMBED_LABEL into Info.plist.
 
 '
   assert_equals "${header}Test replacement" "$(cat ${TEST_log})"
@@ -208,8 +208,8 @@ Baseline: 1170dc6
   header='Release v1 ('$(date +%Y-%m-%d)')
 
 Baseline: 1170dc6
-   + 0540fde: Extract version numbers that look like
-              "..._1.2.3_..." from BUILD_EMBED_LABEL into Info.plist.
+   + 0540fde: Extract version numbers that look like "..._1.2.3_..."
+              from BUILD_EMBED_LABEL into Info.plist.
    + cef25c4: RELNOTES: Attribute error messages related to Android
               resources are easier to understand now.
 
diff --git a/scripts/release/relnotes.sh b/scripts/release/relnotes.sh
index 15abbd1cb7..7071f7186a 100755
--- a/scripts/release/relnotes.sh
+++ b/scripts/release/relnotes.sh
@@ -97,16 +97,10 @@ function get_release_notes() {
   done
 }
 
-# fmt behaves a bit different on GNU/Linux than on BSDs.
-if [ "$(uname -s | tr 'A-Z' 'a-z')" = "linux" ]; then
-  function wrap_text() {
-    fmt -w $1 -g $1
-  }
-else
-  function wrap_text() {
-    fmt -w $1
-  }
-fi
+# fmt behaves differently on *BSD and on GNU/Linux, use fold.
+function wrap_text() {
+  fold -s -w $1 | sed 's/ *$//'
+}
 
 # Returns the list of release notes in arguments into a list of points in
 # a markdown list. The release notes are wrapped to 70 characters so it
diff --git a/scripts/release/relnotes_test.sh b/scripts/release/relnotes_test.sh
index 32d571134e..419ed109a6 100755
--- a/scripts/release/relnotes_test.sh
+++ b/scripts/release/relnotes_test.sh
@@ -198,7 +198,7 @@ function test_create_revision_information() {
               should produce additional information about aspect
               dependencies when --output is set to {xml, proto}.'
    assert_equals "$expected" \
-		 "$(create_revision_information 965c392 bb59d88 14d905b)"
+              "$(create_revision_information 965c392 bb59d88 14d905b)"
 }
 
 run_suite "Release notes generation tests"