Show release notes for a repository without tags

If a repository does not have tags, then all commits are the release
log.

docs/commands.md

@@ -328,7 +328,8 @@ usage: git elegant show-release-notes [<layout> | <layout> <from-reference> | <l
 
 Generates a release notes using commits subjects between the given references.
 The commits are ordered from oldest to newest. By default, the `from-reference`
-is the last available tag, and the `to-reference` is a HEAD revision.
+is the last available tag, and the `to-reference` is a HEAD revision. If
+there are no tags, all commits will be displayed.
 
 There are two options for a `layout`:
 

libexec/git-elegant-show-release-notes

@@ -16,7 +16,8 @@ command-description() {
     cat<<MESSAGE
 Generates a release notes using commits subjects between the given references.
 The commits are ordered from oldest to newest. By default, the \`from-reference\`
-is the last available tag, and the \`to-reference\` is a HEAD revision.
+is the last available tag, and the \`to-reference\` is a HEAD revision. If
+there are no tags, all commits will be displayed.
 
 There are two options for a \`layout\`:
 
@@ -73,7 +74,7 @@ default() {
     local first=${2:-$(last-tag)}
     local second=${3:-@}
     local diapason=${first}...${second}
-    if [[ ${first} == all-commits ]]; then
+    if [[ ${first} == all-commits ]] || [[ -z ${first} ]]; then
         diapason=${second}
     fi
     case ${layout} in

tests/git-elegant-show-release-notes.bats

@@ -71,3 +71,14 @@ teardown() {
     [[ "${status}" -eq 43 ]]
     [[ "${lines[@]}" =~ "'some' layout is not supported." ]]
 }
+
+@test "'show-release-notes': displays all commits if there is no tags" {
+    repo "git tag | xargs git tag -d"
+    check git-elegant show-release-notes
+    [[ "${status}" -eq 0 ]]
+    [[ "${lines[0]}" == "Release notes" ]]
+    [[ "${lines[1]}" == "- Add file" ]]
+    [[ "${lines[2]}" == "- Add ${first}" ]]
+    [[ "${lines[3]}" == "- Add ${second}" ]]
+    [[ "${lines[4]}" == "- Add ${third}" ]]
+}