cli: add ppman spec command

cli/commands/ppman_commands/spec.js

@@ -0,0 +1,161 @@
+const chalk = require('chalk');
+const fs = require('fs/promises');
+const minimatch = require("minimatch");
+const semver = require('semver');
+
+exports.command = ['spec <specfile>'];
+exports.aliases = ['s'];
+exports.describe = 'Install the packages described in the spec file, uninstalling packages which aren\'t in the list'
+
+function does_match(package, rule){
+    const nameMatch = minimatch(package.language, rule.package_selector);
+    const versionMatch = semver.satisfies(package.language_version, rule.version_selector)
+
+    return nameMatch && versionMatch;
+}
+
+exports.handler = async ({axios, specfile}) => {
+    const spec_contents = await fs.readFile(specfile);
+    const spec_lines = spec_contents.toString().split("\n");
+
+    const rules = [];
+
+    for(const line of spec_lines){
+        const rule = {
+            _raw: line.trim(),
+            comment: false,
+            package_selector: null,
+            version_selector: null,
+            negate: false
+        };
+
+        if(line.starts_with("#")){
+            rule.comment = true;
+        }else {
+            let l = line.trim();
+            if(line.starts_with("!")){
+                rule.negate = true;
+                l = line.slice(1).trim();
+            }
+
+            const [pkg, ver] = l.split(" ", 2);
+            rule.package_selector = pkg;
+            rule.version_selector = ver;
+        }
+
+        if(rule._raw.length != 0) rules.push(rule);
+    }
+
+    const packages_req = await axios.get('/api/v2/packages');
+    const packages = packages_req.data;
+
+    const installed = packages.filter(pkg => pkg.installed);
+
+    const ensure_packages = [];
+
+    for(const rule of rules){
+        if(rule.comment) continue;
+
+        const matches = [];
+
+        if(!rule.negate){
+            for(const package of packages){
+                if(does_match(package, rule))
+                    matches.push(package)
+            }
+
+            const latest_matches = matches.filter(
+                pkg => {
+                    const versions = matches
+                        .filter(x=>x.language == pkg.language)
+                        .map(x=>x.language_version).sort(semver.rcompare);
+                    return versions[0] == pkg.language_version
+                }
+            );
+
+            for(const match of latest_matches){
+                if(!ensure_packages.find(pkg => pkg.language == match.language && pkg.language_version == match.language_version))
+                    ensure_packages.push(match)
+            }
+        }else{
+            for(const package of ensure_packages){
+                if(does_match(package, rule))
+                    ensure_packages.splice(ensure_packages.indexOf(package))
+            }
+        }
+
+        
+    }
+
+    const operations = [];
+
+    for(const package of ensure_packages){
+        if(!package.installed)
+            operations.push({
+                type: "install",
+                package: package.language,
+                version: package.language_version
+            });
+    }
+
+    for(const installed_package of installed){
+        if(!ensure_packages.find(
+            pkg => pkg.language == installed_package.language &&
+            pkg.language_version == installed_package.language_version
+        ))
+            operations.push({
+                type: "uninstall",
+                package: installed_package.language,
+                version: installed_package.language_version
+            })
+    }
+
+    console.log(chalk.bold.yellow("Actions"))
+    for(const op of operations){
+        console.log((op.type == "install" ? chalk.green("Install") : chalk.red("Uninstall")) + ` ${op.package} ${op.version}`)
+    }
+
+    if(operations.length == 0){
+        console.log(chalk.gray("None"))
+    }
+
+    for(const op of operations){
+        if(op.type == "install"){
+            try{
+                const install = await axios.post(`/api/v2/packages`, {
+                    language: op.package,
+                    version: op.version
+                });
+
+                if(!install.data.language)
+                    throw new Error(install.data.message); // Go to exception handler
+
+                console.log(chalk.bold.green("Installed"), op.package, op.version)
+
+            }catch(e){
+                console.log(chalk.bold.red("Failed to install") + ` ${op.package} ${op.version}:`, e.message)
+            }
+        }
+        else if(op.type == "uninstall"){
+            try{
+                const install = await axios.delete(`/api/v2/packages`, {
+                    data: {
+                        language: op.package,
+                        version: op.version
+                    }
+                });
+
+                if(!install.data.language)
+                    throw new Error(install.data.message); // Go to exception handler
+
+                console.log(chalk.bold.green("Uninstalled"), op.package, op.version)
+
+            }catch(e){
+                console.log(chalk.bold.red("Failed to uninstall") + ` ${op.package} ${op.version}:`, e.message)
+            }
+        }
+    }
+    
+
+
+}