Release 0.11 Bugfix on git setup

When setting up Git for the first time an out of order configuration can
cause issues for the user.

fixes #6

CHANGELOG.md

@@ -1,3 +1,11 @@
+# git-idm v0.11
+
+- Bug fix: since initial setup assumes a certain order of `.gitconfig` sections,
+  then attempt to assure initial setup every time a write operation would occur
+  to `.gitconfig`.  See issue [#6][#6].
+
+[#6]: https://github.com/samrocketman/git-identity-manager/issues/6
+
 # git-idm v0.10
 
 Important Notes:

README.md

@@ -9,9 +9,10 @@ attempts to make it less painful.
 
 # Requirements
 
-- Git 2.13 or later.
+- Git 2.18 or later.
   - [`git 2.10` or later because of `core.sshCommand`][git-2.10].
   - [`git 2.13` or later because of `includeIf.<condition>.path`][git-2.13].
+  - [`git 2.18` or later because of git-config bug][git-2.18].
 - GNU bash
 - awk (BSD or GNU awk recommended)
 - sed (BSD or GNU sed recommended)
@@ -94,4 +95,5 @@ Verify the identity has switched with `git config user.email`.
 [build-status]: https://travis-ci.org/samrocketman/git-identity-manager
 [git-2.10]: https://github.com/git/git/blob/v2.10.0/Documentation/RelNotes/2.10.0.txt#L83-L84
 [git-2.13]: https://github.com/git/git/blob/v2.13.0/Documentation/RelNotes/2.13.0.txt#L127-L130
+[git-2.18]: https://github.com/git/git/blob/53f9a3e157dbbc901a02ac2c73346d375e24978c/Documentation/RelNotes/2.18.0.txt#L379-L384
 [pbs]: https://www.pbs.org/newshour/health/back-pain-industry-taking-patients-unhealthy-ride

git-idm

@@ -3,12 +3,24 @@
 #License: MIT
 #Project URL: https://github.com/samrocketman/git-identity-manager
 
-version='0.10'
+version='0.11'
 
-if ! git --version | awk 'BEGIN { FS="." }; $2 < 13 { exit(1) }'; then
-    echo 'WARNING: "git --version" is older than Git 2.13.  git-idm will have unexpected behavior.' >&2
+if ! git --version | awk 'BEGIN { FS="." }; $2 < 18 { exit(1) }'; then
+    echo 'WARNING: "git --version" is older than Git 2.18.  git-idm will have unexpected behavior.' >&2
 fi
 
+function initial_setup() {
+  if [ ! -f ~/.gitconfig ]; then
+    touch ~/.gitconfig
+  fi
+  if ! { git config --global -l | grep '^user\.' || grep -F '[user]' ~/.gitconfig; } > /dev/null; then
+    echo '[user]' >> ~/.gitconfig
+  fi
+  if ! { git config --global -l | grep '^include\.' || grep -F '[include]' ~/.gitconfig; } > /dev/null; then
+    echo '[include]' >> ~/.gitconfig
+  fi
+}
+
 function echo_version() {
     echo "git idm v${version}" >&2
 }
@@ -421,6 +433,7 @@ EOF
             echo 'ERROR: options --name, --email, and --key or --ssh-command are required when adding an identity for the first time.' >&2
             exit 1
         fi
+        initial_setup
         if [ -n "${NAME}" ]; then
             run_command git config --global gitidm."${id}".name "${NAME}"
         fi
@@ -444,6 +457,7 @@ EOF
         no_ssh_key_warning "${id}"
         ;;
     copy-key-to)
+        initial_setup
         SSH_KEY="$(git config --global --get gitidm."${FROM_ID}".sshKey)"
         SSH_COMMAND="$(git config --global --get gitidm."${FROM_ID}".sshCommand)"
         if [ -z "${SSH_KEY:-}" ] || [ -z "${SSH_COMMAND:-}" ]; then
@@ -490,6 +504,7 @@ EOF
             echo 'ERROR: git idm track <identity> --directory <directory> requires --directory option to be passed.  See "git idm help".' >&2
             exit 1
         fi
+        initial_setup
         add_identity_file "${id}"
         run_command git config --global includeIf."gitdir:${DIRECTORY}".idm "${id}"
         run_command git config --global includeIf."gitdir:${DIRECTORY}".path ~/".gitconfig_idm_${id}"
@@ -508,6 +523,7 @@ EOF
             echo "ERROR: Identity ${id} does not exist.  See 'git idm list' or 'git idm help'." >&2
             exit 1
         fi
+        initial_setup
         NAME="$(git config --global --get gitidm."${id}".name)"
         EMAIL="$(git config --global --get gitidm."${id}".email)"
         if [ -n "${NAME}" ]; then