Testable install script

* wraps main code into a function
* EnvVar-based install start
* Clean environment after install

.travis.yml

@@ -9,6 +9,11 @@ before_script:
 script:
   - NVM_DIR=$TRAVIS_BUILD_DIR make TEST_SUITE=$TEST_SUITE URCHIN=/tmp/urchin $SHELL
 env:
+  - SHELL=sh TEST_SUITE=install_script
+  - SHELL=dash TEST_SUITE=install_script
+  - SHELL=bash TEST_SUITE=install_script
+  - SHELL=zsh TEST_SUITE=install_script
+  - SHELL=ksh TEST_SUITE=install_script
   - SHELL=sh TEST_SUITE=fast
   - SHELL=dash TEST_SUITE=fast
   - SHELL=bash TEST_SUITE=fast
@@ -34,4 +39,3 @@ env:
   - SHELL=zsh TEST_SUITE=installation WITHOUT_CURL=1
   - SHELL=ksh TEST_SUITE=installation
   - SHELL=ksh TEST_SUITE=installation WITHOUT_CURL=1
-

install.sh

@@ -66,7 +66,8 @@ install_nvm_as_script() {
   }
 }
 
-if [ -z "$METHOD" ]; then
+nvm_do_install() {
+  if [ -z "$METHOD" ]; then
     # Autodetect install method
     if nvm_has "git"; then
       install_nvm_from_git
@@ -76,24 +77,24 @@ if [ -z "$METHOD" ]; then
       echo >&2 "You need git, curl, or wget to install nvm"
       exit 1
     fi
-elif [ "~$METHOD" = "~git" ]; then
+  elif [ "~$METHOD" = "~git" ]; then
     if ! nvm_has "git"; then
       echo >&2 "You need git to install nvm"
       exit 1
     fi
     install_nvm_from_git
-elif [ "~$METHOD" = "~script" ]; then
+  elif [ "~$METHOD" = "~script" ]; then
     if ! nvm_has "nvm_download"; then
       echo >&2 "You need curl or wget to install nvm"
       exit 1
     fi
     install_nvm_as_script
-fi
+  fi
 
-echo
+  echo
 
-# Detect profile file if not specified as environment variable (eg: PROFILE=~/.myprofile).
-if [ -z "$PROFILE" ]; then
+  # Detect profile file if not specified as environment variable (eg: PROFILE=~/.myprofile).
+  if [ -z "$PROFILE" ]; then
     if [ -f "$HOME/.bashrc" ]; then
       PROFILE="$HOME/.bashrc"
     elif [ -f "$HOME/.bash_profile" ]; then
@@ -103,11 +104,11 @@ if [ -z "$PROFILE" ]; then
     elif [ -f "$HOME/.profile" ]; then
       PROFILE="$HOME/.profile"
     fi
-fi
+  fi
 
-SOURCE_STR="\nexport NVM_DIR=\"$NVM_DIR\"\n[ -s \"\$NVM_DIR/nvm.sh\" ] && . \"\$NVM_DIR/nvm.sh\"  # This loads nvm"
+  SOURCE_STR="\nexport NVM_DIR=\"$NVM_DIR\"\n[ -s \"\$NVM_DIR/nvm.sh\" ] && . \"\$NVM_DIR/nvm.sh\"  # This loads nvm"
 
-if [ -z "$PROFILE" ] || [ ! -f "$PROFILE" ] ; then
+  if [ -z "$PROFILE" ] || [ ! -f "$PROFILE" ] ; then
     if [ -z "$PROFILE" ]; then
       echo "=> Profile not found. Tried ~/.bashrc, ~/.bash_profile, ~/.zshrc, and ~/.profile."
       echo "=> Create one of them and run this script again"
@@ -119,13 +120,25 @@ if [ -z "$PROFILE" ] || [ ! -f "$PROFILE" ] ; then
     echo "=> Append the following lines to the correct file yourself:"
     printf "$SOURCE_STR"
     echo
-else
+  else
     if ! grep -qc 'nvm.sh' "$PROFILE"; then
       echo "=> Appending source string to $PROFILE"
       printf "$SOURCE_STR\n" >> "$PROFILE"
     else
       echo "=> Source string already in $PROFILE"
     fi
-fi
+  fi
+
+  echo "=> Close and reopen your terminal to start using nvm"
+  nvm_reset
+}
+
+#
+# Unsets the various functions defined
+# during the execution of the install script
+#
+nvm_reset() {
+  unset -f nvm_do_install nvm_has nvm_download install_nvm_as_script install_nvm_from_git nvm_reset
+}
 
-echo "=> Close and reopen your terminal to start using nvm"
+[ "_$NVM_ENV" = "_testing" ] || nvm_do_install

package.json

@@ -10,7 +10,8 @@
     "test/fast": "urchin -f test/fast",
     "test/slow": "urchin -f test/slow",
     "test/installation": "urchin -f test/installation",
-    "test/sourcing": "urchin -f test/sourcing"
+    "test/sourcing": "urchin -f test/sourcing",
+    "test/install_script": "urchin -f test/install_script"
   },
   "repository": {
     "type": "git",

test/install_script/nvm_do_install

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+NVM_ENV=testing . ../../install.sh
+
+#nvm_do_install is available
+type nvm_do_install > /dev/null 2>&1

test/install_script/nvm_reset

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+NVM_ENV=testing . ../../install.sh
+
+safe_type() {
+  type "$1" > /dev/null 2>&1 && return 0 || return 1
+}
+
+# Check nvm_reset exists
+type nvm_reset > /dev/null 2>&1
+
+# Apply nvm_reset
+nvm_reset
+
+# The names should be unset
+! safe_type nvm_do_install && \
+  ! safe_type nvm_has && \
+  ! safe_type nvm_download && \
+  ! safe_type install_nvm_as_script && \
+  ! safe_type install_nvm_from_git && \
+  ! safe_type nvm_reset