fix: add set -o pipefail to all bin scripts, switch to bash

Change shebang from #!/bin/sh to #!/usr/bin/env bash across all 21
bin scripts. Add set -o pipefail after set -e in all 20 executable
scripts (lib is sourced, not executed directly).

Pipefail ensures pipe component failures propagate correctly,
which is required by the failure mode test suite and enforced
by the Quality Gates static analysis check.

Author: remenoscodes

bin/git-issue

@@ -1,12 +1,12 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # git-issue - Distributed issue tracking embedded in Git
 #
 # Usage: git issue <command> [<args>]
 #
 
 set -e
-
+set -o pipefail
 VERSION="1.3.3"
 
 usage() {

bin/git-issue-comment

@@ -1,10 +1,10 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # git-issue-comment - Add a comment to an issue
 #
 
 set -e
-
+set -o pipefail
 . "$(dirname "$0")/git-issue-lib"
 
 usage() {

bin/git-issue-create

@@ -1,10 +1,10 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # git-issue-create - Create a new issue
 #
 
 set -e
-
+set -o pipefail
 . "$(dirname "$0")/git-issue-lib"
 
 usage() {

bin/git-issue-edit

@@ -1,10 +1,10 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # git-issue-edit - Edit metadata of an existing issue
 #
 
 set -e
-
+set -o pipefail
 . "$(dirname "$0")/git-issue-lib"
 
 usage() {

bin/git-issue-export

@@ -1,10 +1,10 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # git-issue-export - Export local issues to an external provider
 #
 
 set -e
-
+set -o pipefail
 usage() {
 	cat <<EOF
 usage: git issue export <provider> [options]

bin/git-issue-export-gitea

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # git-issue-export-gitea - Export issues to Gitea/Forgejo
 #
@@ -7,7 +7,7 @@
 #
 
 set -e
-
+set -o pipefail
 usage() {
 	cat <<EOF
 usage: git issue export gitea:<owner>/<repo> [options]

bin/git-issue-export-github

@@ -1,12 +1,12 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # git-issue-export-github - Export issues to GitHub
 #
 # Usage: git issue export github:<owner>/<repo> [options]
 #
 
 set -e
-
+set -o pipefail
 usage() {
 	cat <<EOF
 usage: git issue export github:<owner>/<repo> [options]

bin/git-issue-export-gitlab

@@ -1,12 +1,12 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # git-issue-export-gitlab - Export issues to GitLab
 #
 # Usage: git issue export gitlab:<group>/<project> [options]
 #
 
 set -e
-
+set -o pipefail
 usage() {
 	cat <<EOF
 usage: git issue export gitlab:<group>/<project> [options]

bin/git-issue-fsck

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # git-issue-fsck - Validate issue data integrity
 #
@@ -7,7 +7,7 @@
 #
 
 set -e
-
+set -o pipefail
 . "$(dirname "$0")/git-issue-lib"
 
 usage() {

bin/git-issue-import

@@ -1,10 +1,10 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # git-issue-import - Import issues from an external provider
 #
 
 set -e
-
+set -o pipefail
 usage() {
 	cat <<EOF
 usage: git issue import <provider> [options]