nvm/install.sh

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2012-10-30 07:03:01 +08:00
#!/bin/bash
set -e
nvm_has() {
type "$1" > /dev/null 2>&1
return $?
}
if [ -z "$NVM_DIR" ]; then
NVM_DIR="$HOME/.nvm"
fi
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#
# Outputs the location to NVM depending on:
# * The availability of $NVM_SOURCE
# * The method used ("script" or "git" in the script, defaults to "git")
# NVM_SOURCE always takes precedence
#
nvm_source() {
local NVM_METHOD
NVM_METHOD="$1"
if [ -z "$NVM_SOURCE" ]; then
local NVM_SOURCE
else
echo "$NVM_SOURCE"
return 0
fi
if [ "_$NVM_METHOD" = "_script" ]; then
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NVM_SOURCE="https://raw.githubusercontent.com/creationix/nvm/v0.20.0/nvm.sh"
elif [ "_$NVM_METHOD" = "_script-nvm-exec" ]; then
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NVM_SOURCE="https://raw.githubusercontent.com/creationix/nvm/v0.20.0/nvm-exec"
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elif [ "_$NVM_METHOD" = "_git" ] || [ -z "$NVM_METHOD" ]; then
NVM_SOURCE="https://github.com/creationix/nvm.git"
else
echo >&2 "Unexpected value \"$NVM_METHOD\" for \$NVM_METHOD"
return 1
fi
echo "$NVM_SOURCE"
return 0
}
nvm_download() {
if nvm_has "curl"; then
curl $*
elif nvm_has "wget"; then
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# Emulate curl with wget
ARGS=$(echo "$*" | sed -e 's/--progress-bar /--progress=bar /' \
-e 's/-L //' \
-e 's/-I /--server-response /' \
-e 's/-s /-q /' \
-e 's/-o /-O /' \
-e 's/-C - /-c /')
wget $ARGS
fi
}
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install_nvm_from_git() {
if [ -d "$NVM_DIR/.git" ]; then
echo "=> nvm is already installed in $NVM_DIR, trying to update"
printf "\r=> "
cd "$NVM_DIR" && (git fetch 2> /dev/null || {
echo >&2 "Failed to update nvm, run 'git fetch' in $NVM_DIR yourself." && exit 1
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})
else
# Cloning to $NVM_DIR
echo "=> Downloading nvm from git to '$NVM_DIR'"
printf "\r=> "
mkdir -p "$NVM_DIR"
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git clone "$(nvm_source "git")" "$NVM_DIR"
fi
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cd "$NVM_DIR" && git checkout v0.20.0 && git branch -D master >/dev/null 2>&1
return
}
install_nvm_as_script() {
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local NVM_SOURCE
NVM_SOURCE=$(nvm_source "script")
local NVM_EXEC_SOURCE
NVM_EXEC_SOURCE=$(nvm_source "script-nvm-exec")
# Downloading to $NVM_DIR
mkdir -p "$NVM_DIR"
if [ -d "$NVM_DIR/nvm.sh" ]; then
echo "=> nvm is already installed in $NVM_DIR, trying to update"
else
echo "=> Downloading nvm as script to '$NVM_DIR'"
fi
nvm_download -s "$NVM_SOURCE" -o "$NVM_DIR/nvm.sh" || {
echo >&2 "Failed to download '$NVM_SOURCE'"
return 1
}
nvm_download -s "$NVM_EXEC_SOURCE" -o "$NVM_DIR/nvm-exec" || {
echo >&2 "Failed to download '$NVM_EXEC_SOURCE'"
return 2
}
chmod a+x "$NVM_DIR/nvm-exec" || {
echo >&2 "Failed to mark '$NVM_DIR/nvm-exec' as executable"
return 3
}
}
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#
# Detect profile file if not specified as environment variable
# (eg: PROFILE=~/.myprofile)
# The echo'ed path is guaranteed to be an existing file
# Otherwise, an empty string is returned
#
nvm_detect_profile() {
if [ -f "$PROFILE" ]; then
echo "$PROFILE"
elif [ -f "$HOME/.bashrc" ]; then
echo "$HOME/.bashrc"
elif [ -f "$HOME/.bash_profile" ]; then
echo "$HOME/.bash_profile"
elif [ -f "$HOME/.zshrc" ]; then
echo "$HOME/.zshrc"
elif [ -f "$HOME/.profile" ]; then
echo "$HOME/.profile"
fi
}
nvm_do_install() {
if [ -z "$METHOD" ]; then
# Autodetect install method
if nvm_has "git"; then
install_nvm_from_git
elif nvm_has "nvm_download"; then
install_nvm_as_script
else
echo >&2 "You need git, curl, or wget to install nvm"
exit 1
fi
elif [ "~$METHOD" = "~git" ]; then
if ! nvm_has "git"; then
echo >&2 "You need git to install nvm"
exit 1
fi
install_nvm_from_git
elif [ "~$METHOD" = "~script" ]; then
if ! nvm_has "nvm_download"; then
echo >&2 "You need curl or wget to install nvm"
exit 1
fi
install_nvm_as_script
fi
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echo
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local NVM_PROFILE
NVM_PROFILE=$(nvm_detect_profile)
SOURCE_STR="\nexport NVM_DIR=\"$NVM_DIR\"\n[ -s \"\$NVM_DIR/nvm.sh\" ] && . \"\$NVM_DIR/nvm.sh\" # This loads nvm"
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if [ -z "$NVM_PROFILE" ] ; then
echo "=> Profile not found. Tried $NVM_PROFILE (as defined in \$PROFILE), ~/.bashrc, ~/.bash_profile, ~/.zshrc, and ~/.profile."
echo "=> Create one of them and run this script again"
echo "=> Create it (touch $NVM_PROFILE) and run this script again"
echo " OR"
echo "=> Append the following lines to the correct file yourself:"
printf "$SOURCE_STR"
echo
else
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if ! grep -qc 'nvm.sh' "$NVM_PROFILE"; then
echo "=> Appending source string to $NVM_PROFILE"
printf "$SOURCE_STR\n" >> "$NVM_PROFILE"
else
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echo "=> Source string already in $NVM_PROFILE"
fi
fi
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echo "=> Close and reopen your terminal to start using nvm"
nvm_reset
}
#
# Unsets the various functions defined
# during the execution of the install script
#
nvm_reset() {
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unset -f nvm_do_install nvm_has nvm_download install_nvm_as_script install_nvm_from_git nvm_reset nvm_detect_profile
}
[ "_$NVM_ENV" = "_testing" ] || nvm_do_install