feature/bash_fish_power_shells_completions

openspec/changes/archive/2025-12-23-extend-shell-completions/proposal.md

@@ -0,0 +1,15 @@
+# Change Proposal: Extend Shell Completions
+
+## Why
+
+Zsh completions provide an excellent developer experience, but many developers use bash, fish, or PowerShell. Extending completion support to these shells removes friction for the majority of developers who don't use Zsh.
+
+## What Changes
+
+This change adds bash, fish, and PowerShell completion support following the same architectural patterns, documentation methodology, and testing rigor established for Zsh completions.
+
+## Deltas
+
+- **Spec:** `cli-completion`
+  - **Operation:** MODIFIED
+  - **Description:** Extend completion generation, installation, and testing requirements to support bash, fish, and PowerShell while maintaining the existing Zsh implementation and architectural patterns

openspec/changes/archive/2025-12-23-extend-shell-completions/tasks.md

@@ -0,0 +1,49 @@
+# Implementation Tasks
+
+## Phase 1: Foundation and Bash Support
+
+- [x] Update `SupportedShell` type in `src/utils/shell-detection.ts` to include `'bash' | 'fish' | 'powershell'`
+- [x] Extend shell detection logic to recognize bash, fish, and PowerShell from environment variables
+- [x] Create `src/core/completions/generators/bash-generator.ts` implementing `CompletionGenerator` interface
+- [x] Create `src/core/completions/installers/bash-installer.ts` implementing `CompletionInstaller` interface
+- [x] Update `CompletionFactory.createGenerator()` to support bash
+- [x] Update `CompletionFactory.createInstaller()` to support bash
+- [x] Create test file `test/core/completions/generators/bash-generator.test.ts` mirroring zsh test structure
+- [x] Create test file `test/core/completions/installers/bash-installer.test.ts` mirroring zsh test structure
+- [x] Verify bash completions work manually: `openspec completion install bash && exec bash`
+
+## Phase 2: Fish Support
+
+- [x] Create `src/core/completions/generators/fish-generator.ts` implementing `CompletionGenerator` interface
+- [x] Create `src/core/completions/installers/fish-installer.ts` implementing `CompletionInstaller` interface
+- [x] Update `CompletionFactory.createGenerator()` to support fish
+- [x] Update `CompletionFactory.createInstaller()` to support fish
+- [x] Create test file `test/core/completions/generators/fish-generator.test.ts`
+- [x] Create test file `test/core/completions/installers/fish-installer.test.ts`
+- [x] Verify fish completions work manually: `openspec completion install fish`
+
+## Phase 3: PowerShell Support
+
+- [x] Create `src/core/completions/generators/powershell-generator.ts` implementing `CompletionGenerator` interface
+- [x] Create `src/core/completions/installers/powershell-installer.ts` implementing `CompletionInstaller` interface
+- [x] Update `CompletionFactory.createGenerator()` to support powershell
+- [x] Update `CompletionFactory.createInstaller()` to support powershell
+- [x] Create test file `test/core/completions/generators/powershell-generator.test.ts`
+- [x] Create test file `test/core/completions/installers/powershell-installer.test.ts`
+- [x] Verify PowerShell completions work manually on Windows or macOS PowerShell
+
+## Phase 4: Documentation and Testing
+
+- [x] Update `CLAUDE.md` or relevant documentation to mention all four supported shells
+- [x] Add cross-shell consistency test verifying all shells support same commands
+- [x] Run `pnpm test` to ensure all tests pass
+- [x] Run `pnpm run build` to verify TypeScript compilation
+- [x] Test all shells on different platforms (Linux for bash/fish/zsh, Windows/macOS for PowerShell)
+
+## Phase 5: Validation and Cleanup
+
+- [x] Run `openspec validate extend-shell-completions --strict` and resolve all issues
+- [x] Update error messages to list all four supported shells
+- [x] Verify `openspec completion --help` documentation is current
+- [x] Test auto-detection works for all shells
+- [x] Ensure uninstall works cleanly for all shells

src/commands/completion.ts

@@ -149,6 +149,14 @@ export class CompletionCommand {
           }
         }
 
+        // Display warnings if present
+        if (result.warnings && result.warnings.length > 0) {
+          console.log('');
+          for (const warning of result.warnings) {
+            console.log(warning);
+          }
+        }
+
         // Print instructions (only shown if .zshrc wasn't auto-configured)
         if (result.instructions && result.instructions.length > 0) {
           console.log('');

src/core/completions/factory.ts

@@ -1,8 +1,31 @@
 import { CompletionGenerator } from './types.js';
 import { ZshGenerator } from './generators/zsh-generator.js';
-import { ZshInstaller, InstallationResult } from './installers/zsh-installer.js';
+import { BashGenerator } from './generators/bash-generator.js';
+import { FishGenerator } from './generators/fish-generator.js';
+import { PowerShellGenerator } from './generators/powershell-generator.js';
+import { ZshInstaller } from './installers/zsh-installer.js';
+import { BashInstaller } from './installers/bash-installer.js';
+import { FishInstaller } from './installers/fish-installer.js';
+import { PowerShellInstaller } from './installers/powershell-installer.js';
 import { SupportedShell } from '../../utils/shell-detection.js';
 
+/**
+ * Common installation result interface
+ */
+export interface InstallationResult {
+  success: boolean;
+  installedPath?: string;
+  backupPath?: string;
+  message: string;
+  instructions?: string[];
+  warnings?: string[];
+  // Shell-specific optional fields
+  isOhMyZsh?: boolean;
+  zshrcConfigured?: boolean;
+  bashrcConfigured?: boolean;
+  profileConfigured?: boolean;
+}
+
 /**
  * Interface for completion installers
  */
@@ -11,15 +34,12 @@ export interface CompletionInstaller {
   uninstall(): Promise<{ success: boolean; message: string }>;
 }
 
-// Re-export InstallationResult for convenience
-export type { InstallationResult };
-
 /**
  * Factory for creating completion generators and installers
  * This design makes it easy to add support for additional shells
  */
 export class CompletionFactory {
-  private static readonly SUPPORTED_SHELLS: SupportedShell[] = ['zsh'];
+  private static readonly SUPPORTED_SHELLS: SupportedShell[] = ['zsh', 'bash', 'fish', 'powershell'];
 
   /**
    * Create a completion generator for the specified shell
@@ -32,6 +52,12 @@ export class CompletionFactory {
     switch (shell) {
       case 'zsh':
         return new ZshGenerator();
+      case 'bash':
+        return new BashGenerator();
+      case 'fish':
+        return new FishGenerator();
+      case 'powershell':
+        return new PowerShellGenerator();
       default:
         throw new Error(`Unsupported shell: ${shell}`);
     }
@@ -48,6 +74,12 @@ export class CompletionFactory {
     switch (shell) {
       case 'zsh':
         return new ZshInstaller();
+      case 'bash':
+        return new BashInstaller();
+      case 'fish':
+        return new FishInstaller();
+      case 'powershell':
+        return new PowerShellInstaller();
       default:
         throw new Error(`Unsupported shell: ${shell}`);
     }

src/core/completions/generators/bash-generator.ts

@@ -0,0 +1,175 @@
+import { CompletionGenerator, CommandDefinition, FlagDefinition } from '../types.js';
+import { BASH_DYNAMIC_HELPERS } from '../templates/bash-templates.js';
+
+/**
+ * Generates Bash completion scripts for the OpenSpec CLI.
+ * Follows Bash completion conventions using complete builtin and COMPREPLY array.
+ */
+export class BashGenerator implements CompletionGenerator {
+  readonly shell = 'bash' as const;
+
+  /**
+   * Generate a Bash completion script
+   *
+   * @param commands - Command definitions to generate completions for
+   * @returns Bash completion script as a string
+   */
+  generate(commands: CommandDefinition[]): string {
+    // Build command list for top-level completions
+    const commandList = commands.map(c => this.escapeCommandName(c.name)).join(' ');
+
+    // Build command cases using push() for loop clarity
+    const caseLines: string[] = [];
+    for (const cmd of commands) {
+      caseLines.push(`    ${cmd.name})`);
+      caseLines.push(...this.generateCommandCase(cmd, '      '));
+      caseLines.push('      ;;');
+    }
+    const commandCases = caseLines.join('\n');
+
+    // Dynamic completion helpers from template
+    const helpers = BASH_DYNAMIC_HELPERS;
+
+    // Assemble final script with template literal
+    return `# Bash completion script for OpenSpec CLI
+# Auto-generated - do not edit manually
+
+_openspec_completion() {
+  local cur prev words cword
+
+  # Use _init_completion if available (from bash-completion package)
+  # Otherwise, fall back to manual initialization
+  if declare -F _init_completion >/dev/null 2>&1; then
+    _init_completion || return
+  else
+    # Manual fallback when bash-completion is not installed
+    COMPREPLY=()
+    _get_comp_words_by_ref -n : cur prev words cword 2>/dev/null || {
+      cur="\${COMP_WORDS[COMP_CWORD]}"
+      prev="\${COMP_WORDS[COMP_CWORD-1]}"
+      words=("\${COMP_WORDS[@]}")
+      cword=$COMP_CWORD
+    }
+  fi
+
+  local cmd="\${words[1]}"
+  local subcmd="\${words[2]}"
+
+  # Top-level commands
+  if [[ $cword -eq 1 ]]; then
+    local commands="${commandList}"
+    COMPREPLY=($(compgen -W "$commands" -- "$cur"))
+    return 0
+  fi
+
+  # Command-specific completion
+  case "$cmd" in
+${commandCases}
+  esac
+
+  return 0
+}
+
+${helpers}
+complete -F _openspec_completion openspec
+`;
+  }
+
+  /**
+   * Generate completion case logic for a command
+   */
+  private generateCommandCase(cmd: CommandDefinition, indent: string): string[] {
+    const lines: string[] = [];
+
+    // Handle subcommands
+    if (cmd.subcommands && cmd.subcommands.length > 0) {
+      lines.push(`${indent}if [[ $cword -eq 2 ]]; then`);
+      lines.push(`${indent}  local subcommands="` + cmd.subcommands.map(s => this.escapeCommandName(s.name)).join(' ') + '"');
+      lines.push(`${indent}  COMPREPLY=($(compgen -W "$subcommands" -- "$cur"))`);
+      lines.push(`${indent}  return 0`);
+      lines.push(`${indent}fi`);
+      lines.push('');
+      lines.push(`${indent}case "$subcmd" in`);
+
+      for (const subcmd of cmd.subcommands) {
+        lines.push(`${indent}  ${subcmd.name})`);
+        lines.push(...this.generateArgumentCompletion(subcmd, indent + '    '));
+        lines.push(`${indent}    ;;`);
+      }
+
+      lines.push(`${indent}esac`);
+    } else {
+      // No subcommands, just complete arguments
+      lines.push(...this.generateArgumentCompletion(cmd, indent));
+    }
+
+    return lines;
+  }
+
+  /**
+   * Generate argument completion (flags and positional arguments)
+   */
+  private generateArgumentCompletion(cmd: CommandDefinition, indent: string): string[] {
+    const lines: string[] = [];
+
+    // Check for flag completion
+    if (cmd.flags.length > 0) {
+      lines.push(`${indent}if [[ "$cur" == -* ]]; then`);
+      const flags = cmd.flags.map(f => {
+        const parts: string[] = [];
+        if (f.short) parts.push(`-${f.short}`);
+        parts.push(`--${f.name}`);
+        return parts.join(' ');
+      }).join(' ');
+      lines.push(`${indent}  local flags="${flags}"`);
+      lines.push(`${indent}  COMPREPLY=($(compgen -W "$flags" -- "$cur"))`);
+      lines.push(`${indent}  return 0`);
+      lines.push(`${indent}fi`);
+      lines.push('');
+    }
+
+    // Handle positional completions
+    if (cmd.acceptsPositional) {
+      lines.push(...this.generatePositionalCompletion(cmd.positionalType, indent));
+    }
+
+    return lines;
+  }
+
+  /**
+   * Generate positional argument completion based on type
+   */
+  private generatePositionalCompletion(positionalType: string | undefined, indent: string): string[] {
+    const lines: string[] = [];
+
+    switch (positionalType) {
+      case 'change-id':
+        lines.push(`${indent}_openspec_complete_changes`);
+        break;
+      case 'spec-id':
+        lines.push(`${indent}_openspec_complete_specs`);
+        break;
+      case 'change-or-spec-id':
+        lines.push(`${indent}_openspec_complete_items`);
+        break;
+      case 'shell':
+        lines.push(`${indent}local shells="zsh bash fish powershell"`);
+        lines.push(`${indent}COMPREPLY=($(compgen -W "$shells" -- "$cur"))`);
+        break;
+      case 'path':
+        lines.push(`${indent}COMPREPLY=($(compgen -f -- "$cur"))`);
+        break;
+    }
+
+    return lines;
+  }
+
+
+  /**
+   * Escape command/subcommand names for safe use in Bash scripts
+   */
+  private escapeCommandName(name: string): string {
+    // Escape shell metacharacters to prevent command injection
+    return name.replace(/["\$`\\]/g, '\\$&');
+  }
+}