WIP: feature: acquire exact tarantool version

Sometimes we want to test a module against specific tarantool version,
not a latest in the series. For example, 2.6 series may have 2.6.1,
2.6.2 and 2.6.3 releases and we want to setup 2.6.1.

TBD: Rebase after PR #21.

TBD: Add a test.

Fixes #15

Author: Totktonada

README.md

@@ -24,14 +24,24 @@ steps:
   - run: .rocks/bin/luatest -v
 ```
 
+### Install an exact version
+
+```
+steps:
+  - uses: actions/checkout@v2
+  - uses: tarantool/setup-tarantool@v1
+    with:
+      tarantool-version: '2.6.1'
+```
+
 ### Install a nightly build
 
 ```yaml
 steps:
   - uses: actions/checkout@v2
   - uses: tarantool/setup-tarantool@v1
     with:
-      tarantool-version: '2.6'
+      tarantool-version: '2.6'  # or, say, '2.6.1.0' for exact version
       nightly-build: true
 ```
 

dist/main/index.js

@@ -58023,9 +58023,11 @@ const io = __importStar(__nccwpck_require__(7436));
 const path = __importStar(__nccwpck_require__(1017));
 const fs = __importStar(__nccwpck_require__(7147));
 const nightlyBuild = (core.getInput('nightly-build') || 'false').toUpperCase() === 'TRUE';
+const tarantool_version = core.getInput('tarantool-version', { required: true });
+const tarantool_series = tarantool_version.split('.', 2).join('.');
 const baseUrl = 'https://download.tarantool.org/tarantool/' +
     (nightlyBuild ? '' : 'release/') +
-    core.getInput('tarantool-version', { required: true });
+    tarantool_series;
 async function capture(cmd, options) {
     let output = '';
     await exec.exec(cmd, [], {
@@ -58106,14 +58108,28 @@ async function run_linux() {
     try {
         const distro = await lsb_release();
         const cache_dir = 'cache-tarantool';
-        core.startGroup('Checking latest tarantool version');
-        const version = await latest_version();
-        core.info(`${version}`);
-        core.endGroup();
+        /*
+         * Find latest version if inexact tarantool version is
+         * provided.
+         *
+         * Exact version is X.Y.Z for 'release' repository and X.Y.Z.N
+         * for 'live' repository (nightly builds).
+         */
+        const version_is_exact = tarantool_version.split('.').length >= (nightlyBuild ? 3 : 4);
+        let exact_version;
+        if (version_is_exact) {
+            exact_version = tarantool_version;
+        }
+        else {
+            core.startGroup('Checking latest tarantool version');
+            exact_version = await latest_version();
+            core.endGroup();
+        }
+        core.info(`${exact_version}`);
         if (core.getInput('cache-key')) {
             core.warning("Setup-tarantool input 'cache-key' is deprecated");
         }
-        let cache_key = `tarantool-setup-${distro}-${version}`;
+        let cache_key = `tarantool-setup-${distro}-${exact_version}`;
         // This for testing only
         cache_key += process.env['TARANTOOL_CACHE_KEY_SUFFIX'] || '';
         if (await cache.restoreCache([cache_dir], cache_key)) {
@@ -58143,7 +58159,7 @@ async function run_linux() {
         });
         core.startGroup('Installing tarantool');
         const dpkg_before = await dpkg_list();
-        await exec.exec('sudo apt-get install -y tarantool tarantool-dev');
+        await exec.exec(`sudo apt-get install -y tarantool=${exact_version}* tarantool-dev=${exact_version}*`);
         const dpkg_after = await dpkg_list();
         const dpkg_diff = Array.from(dpkg_after.values()).filter(pkg => !dpkg_before.has(pkg));
         core.endGroup();

src/main.ts

@@ -9,10 +9,12 @@ import * as fs from 'fs'
 
 const nightlyBuild =
   (core.getInput('nightly-build') || 'false').toUpperCase() === 'TRUE'
+const tarantool_version = core.getInput('tarantool-version', {required: true})
+const tarantool_series = tarantool_version.split('.', 2).join('.')
 const baseUrl =
   'https://download.tarantool.org/tarantool/' +
   (nightlyBuild ? '' : 'release/') +
-  core.getInput('tarantool-version', {required: true})
+  tarantool_series
 
 interface CaptureOptions {
   /** optional.  defaults to false */
@@ -104,15 +106,29 @@ async function run_linux(): Promise<void> {
     const distro = await lsb_release()
     const cache_dir = 'cache-tarantool'
 
-    core.startGroup('Checking latest tarantool version')
-    const version = await latest_version()
-    core.info(`${version}`)
-    core.endGroup()
+    /*
+     * Find latest version if inexact tarantool version is
+     * provided.
+     *
+     * Exact version is X.Y.Z for 'release' repository and X.Y.Z.N
+     * for 'live' repository (nightly builds).
+     */
+    const version_is_exact =
+      tarantool_version.split('.').length >= (nightlyBuild ? 3 : 4)
+    let exact_version
+    if (version_is_exact) {
+      exact_version = tarantool_version
+    } else {
+      core.startGroup('Checking latest tarantool version')
+      exact_version = await latest_version()
+      core.endGroup()
+    }
+    core.info(`${exact_version}`)
 
     if (core.getInput('cache-key')) {
       core.warning("Setup-tarantool input 'cache-key' is deprecated")
     }
-    let cache_key = `tarantool-setup-${distro}-${version}`
+    let cache_key = `tarantool-setup-${distro}-${exact_version}`
     // This for testing only
     cache_key += process.env['TARANTOOL_CACHE_KEY_SUFFIX'] || ''
 
@@ -148,7 +164,9 @@ async function run_linux(): Promise<void> {
     core.startGroup('Installing tarantool')
 
     const dpkg_before = await dpkg_list()
-    await exec.exec('sudo apt-get install -y tarantool tarantool-dev')
+    await exec.exec(
+      `sudo apt-get install -y tarantool=${exact_version}* tarantool-dev=${exact_version}*`
+    )
     const dpkg_after = await dpkg_list()
 
     const dpkg_diff: Array<string> = Array.from(dpkg_after.values()).filter(