feat: Add support for major zero-style initial development

Cargo.toml

@@ -9,7 +9,7 @@ license = "MIT"
 term = "0.2"
 toml = "0.1"
 regex = "0.1"
-semver = "0.2.1"
+semver = "0.9.0"
 rustc-serialize = "0.3.16"
 git2 = "0.7.5"
 clog = "0.9.1"

src/main.rs

@@ -79,16 +79,44 @@ fn string_to_bool(answer: &str) -> bool {
 
 fn version_bump(version: &Version, bump: CommitType) -> Option<Version> {
     let mut version = version.clone();
-    match bump {
-        CommitType::Unknown => return None,
-        CommitType::Patch => version.increment_patch(),
-        CommitType::Minor => version.increment_minor(),
-        CommitType::Major => version.increment_major(),
+
+    // NB: According to the Semver spec, major version zero is for
+    // the initial development phase is treated slightly differently.
+    // The minor version is incremented for breaking changes
+    // and major is kept at zero until the public API has become more stable.
+    if version.major == 0 {
+        match bump {
+            CommitType::Unknown => return None,
+            CommitType::Patch => version.increment_patch(),
+            CommitType::Minor => version.increment_patch(),
+            CommitType::Major => version.increment_minor(),
+        }
+    } else {
+        match bump {
+            CommitType::Unknown => return None,
+            CommitType::Patch => version.increment_patch(),
+            CommitType::Minor => version.increment_minor(),
+            CommitType::Major => version.increment_major(),
+        }
     }
 
     Some(version)
 }
 
+#[test]
+fn test_breaking_bump_major_zero() {
+    let buggy_release = Version::parse("0.2.0").unwrap();
+    let bumped_version = version_bump(&buggy_release, CommitType::Major).unwrap();
+    assert_eq!(bumped_version, Version::parse("0.3.0").unwrap());
+}
+
+#[test]
+fn test_breaking_bump_major_one() {
+    let buggy_release = Version::parse("1.0.0").unwrap();
+    let bumped_version = version_bump(&buggy_release, CommitType::Major).unwrap();
+    assert_eq!(bumped_version, Version::parse("2.0.0").unwrap());
+}
+
 fn ci_env_set() -> bool {
     env::var("CI").is_ok()
 }

tests/integration/fixtures/initial-release/_git/COMMIT_EDITMSG

@@ -1,19 +1 @@
-Initial commit
-
-# Please enter the commit message for your changes. Lines starting
-# with '#' will be ignored, and an empty message aborts the commit.
-#
-# Date:      Mon Dec 28 18:58:01 2015 +0100
-#
-# On branch master
-#
-# Initial commit
-#
-# Changes to be committed:
-#	new file:   .gitignore
-#	new file:   Cargo.toml
-#	new file:   src/lib.rs
-#
-# Untracked files:
-#	_Cargo.toml
-#
+chore: Start at version 0.0.0 so initial release becomes 0.1.0

tests/integration/fixtures/initial-release/_git/ORIG_HEAD

@@ -1 +1 @@
-10fd867fb5cfc98335bbc17d45a562695ca3d456
+99b6a63cde37b4aa4fc2c8b0f6929bec1bdea8e9

tests/integration/fixtures/initial-release/_git/logs/HEAD

@@ -2,3 +2,7 @@
 10fd867fb5cfc98335bbc17d45a562695ca3d456 9be25420c4b6efd46024fe781111ab0bfdafa703 Jan-Erik Rediger <janerik@fnordig.de> 1456269321 +0100	commit (amend): Initial commit
 9be25420c4b6efd46024fe781111ab0bfdafa703 d10b6057b5f6aa60e5a5f96d62b573a4b5f62b93 Jan-Erik Rediger <janerik@fnordig.de> 1456269588 +0100	commit (amend): Initial commit
 d10b6057b5f6aa60e5a5f96d62b573a4b5f62b93 020521852d041fe00e67529a548ce153b4d637c7 Jan-Erik Rediger <janerik@fnordig.de> 1456269607 +0100	commit (amend): Initial commit
+020521852d041fe00e67529a548ce153b4d637c7 020521852d041fe00e67529a548ce153b4d637c7 Sebastian Mandrean <sebastian.mandrean@gmail.com> 1557411633 +0200	reset: moving to master
+020521852d041fe00e67529a548ce153b4d637c7 99b6a63cde37b4aa4fc2c8b0f6929bec1bdea8e9 Sebastian Mandrean <sebastian.mandrean@gmail.com> 1557411812 +0200	commit: Bump version to 1.0.0
+99b6a63cde37b4aa4fc2c8b0f6929bec1bdea8e9 020521852d041fe00e67529a548ce153b4d637c7 Sebastian Mandrean <sebastian.mandrean@gmail.com> 1557411869 +0200	reset: moving to HEAD~1
+020521852d041fe00e67529a548ce153b4d637c7 202003ba4446fb6b5d46698eada64c54b99161f0 Sebastian Mandrean <sebastian.mandrean@gmail.com> 1557412174 +0200	commit: chore: Start at version 0.0.0 so initial release becomes 0.1.0

tests/integration/fixtures/initial-release/_git/logs/refs/heads/master

@@ -2,3 +2,6 @@
 10fd867fb5cfc98335bbc17d45a562695ca3d456 9be25420c4b6efd46024fe781111ab0bfdafa703 Jan-Erik Rediger <janerik@fnordig.de> 1456269321 +0100	commit (amend): Initial commit
 9be25420c4b6efd46024fe781111ab0bfdafa703 d10b6057b5f6aa60e5a5f96d62b573a4b5f62b93 Jan-Erik Rediger <janerik@fnordig.de> 1456269588 +0100	commit (amend): Initial commit
 d10b6057b5f6aa60e5a5f96d62b573a4b5f62b93 020521852d041fe00e67529a548ce153b4d637c7 Jan-Erik Rediger <janerik@fnordig.de> 1456269607 +0100	commit (amend): Initial commit
+020521852d041fe00e67529a548ce153b4d637c7 99b6a63cde37b4aa4fc2c8b0f6929bec1bdea8e9 Sebastian Mandrean <sebastian.mandrean@gmail.com> 1557411812 +0200	commit: Bump version to 1.0.0
+99b6a63cde37b4aa4fc2c8b0f6929bec1bdea8e9 020521852d041fe00e67529a548ce153b4d637c7 Sebastian Mandrean <sebastian.mandrean@gmail.com> 1557411869 +0200	reset: moving to HEAD~1
+020521852d041fe00e67529a548ce153b4d637c7 202003ba4446fb6b5d46698eada64c54b99161f0 Sebastian Mandrean <sebastian.mandrean@gmail.com> 1557412174 +0200	commit: chore: Start at version 0.0.0 so initial release becomes 0.1.0

tests/integration/fixtures/initial-release/_git/objects/57/8440bc9bbd303ff0784da98cae817f939c16e9

@@ -0,0 +1 @@
+x
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tests/integration/fixtures/initial-release/_git/objects/85/a5a14b503da0637e4835482009fed00cb61aa6

@@ -0,0 +1 @@
+x
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tests/integration/fixtures/initial-release/_git/objects/88/87d37326abfa5dc2a2d852fc6e9cb718a69d7f

@@ -0,0 +1,2 @@
+x
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+�0@a�9�@7�4̤�
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tests/integration/fixtures/initial-release/_git/refs/heads/master

@@ -1 +1 @@
-020521852d041fe00e67529a548ce153b4d637c7
+202003ba4446fb6b5d46698eada64c54b99161f0

tests/integration/integration.bats

@@ -46,12 +46,12 @@ setup_dirs() {
   [ "$status" -eq 1 ]
 }
 
-@test "Initializes to v1.0.0" {
+@test "Initializes to v0.1.0" {
   cd initial-release
   setup_dirs
 
   semantic-rs --write=yes --release=no
-  grep -q 'version = "1.0.0"' Cargo.toml
+  grep -q 'version = "0.1.0"' Cargo.toml
 }
 
 @test "Bumps to next minor" {
@@ -115,7 +115,7 @@ setup_dirs() {
   setup_dirs
 
   CI=true semantic-rs --release=no
-  grep -q 'version = "1.0.0"' Cargo.toml
+  grep -q 'version = "0.2.0"' Cargo.toml
 }
 
 @test "Runs in dry-run-mode with CI=true but dry-run forced" {