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Enhancements including help text, enforcing lynx to be present, and proper install of R15B03-1 #5

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merged 2 commits into from
Aug 24, 2013
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Enhancements including help text, enforcing lynx to be present, and proper install of R15B03-1 #5

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8d720d9
* Extracted list_available_erl_versions method.
neowulf Aug 24, 2013
84a18a5
adding documentation for evm installed and evm cache; fixing the mult…
neowulf Aug 24, 2013
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99 changes: 75 additions & 24 deletions evm
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Original file line number Diff line number Diff line change
Expand Up @@ -11,18 +11,25 @@ ERLANG_URL="http://www.erlang.org"
FILE_PATH="/download/otp_src_"
FILE_EXTENSION=".tar.gz"
FILE_PREFIX="otp_src_"
DEFAULT_TAR_LOCATION=$HOME"/.evm/erlang_tars/"
DEFAULT_INSTALL_LOCATION=$HOME"/.evm/erlang_versions/"
EVM_HOME=$HOME"/.evm"
DEFAULT_TAR_LOCATION=$EVM_HOME"/erlang_tars/"
DEFAULT_INSTALL_LOCATION=$EVM_HOME"/erlang_versions/"

# TODO: add here some way to discover what's the
# default version and what's been set to be used and the ones already downloaded
# For now just load the default version
if [[ -f "$HOME/.evm/evm_config/erlang_default" ]]
if [[ -f "$EVM_HOME/evm_config/erlang_default" ]]
then
default=$(cat "$HOME/.evm/evm_config/erlang_default")
default=$(cat "$EVM_HOME/evm_config/erlang_default")
export PATH="$PATH:$DEFAULT_INSTALL_LOCATION$FILE_PREFIX$default/bin"
fi

function list_available_erl_versions() {
lynx -dump -nolist "$ERLANG_ORG" "$AUTH" \
| \grep -P "\* R[1-9]+" \
| sed 's/.*\* //'
}

# This function is responsible for listing all
# available erlang versions from erlang.org page
# @params: none
Expand All @@ -37,10 +44,10 @@ function evm_list() {
local AUTH="-pauth=$USER:$PASS"
fi

local ERLANGS=$(lynx -dump -nolist "$ERLANG_ORG" "$AUTH" | egrep "\s+\* R[1-9]+" | sed 's/.*\* //')
local ERLANGS=$(list_available_erl_versions)
echo Available Erlang versions on $ERLANG_URL
echo

for erlang in $(echo "$ERLANGS" | sort | perl -e 'print reverse <>'); do
echo "$erlang" | cut -d ' ' -f 1
done
Expand All @@ -50,7 +57,7 @@ function evm_list() {

# This function will receive the version name to be
# downloaded. If the version exists in the erlang.org
# it will be stored at $HOME/.evm/erlang_tars. If not, a message is printed
# it will be stored at $EVM_HOME/erlang_tars. If not, a message is printed
# to user
# @params: erlang_version
function evm_download() {
Expand All @@ -61,9 +68,9 @@ function evm_download() {
local AUTH="-pauth=$USER:$PASS"
fi

local ERLANGS=$(lynx -dump -nolist "$ERLANG_ORG" "$AUTH" | egrep "\s+\* R[1-9]+" | sed 's/.*\* //')
local ERLANGS=$(list_available_erl_versions)

if [[ -z $(echo "$ERLANGS" | grep "$1") ]]
if [[ -z $(echo "$ERLANGS" | grep -P "$1") ]]
then
echo "$1 - This version is not available at $ERLANG_ORG"
else
Expand All @@ -83,10 +90,9 @@ function evm_download() {
# the system version of ERLANG available.
# @params: none
function evm_system() {
local evm_path=$HOME/.evm


PATH="$(printf "$PATH" \
| awk -v RS=: -v ORS=: "/${evm_path//\//\/}/ {next} {print}" \
| awk -v RS=: -v ORS=: "/${EVM_HOME//\//\/}/ {next} {print}" \
| sed -e 's#:$##')"

export PATH
Expand All @@ -109,7 +115,7 @@ function evm_install() {
local AUTH="-pauth=$USER:$PASS"
fi

local ERLANGS=$(lynx -dump -nolist "$ERLANG_ORG" "$AUTH" | egrep "\s+\* R[1-9]+" | sed 's/.*\* //')
local ERLANGS=$(list_available_erl_versions)

if [[ -z $(echo "$ERLANGS" | grep "$1") ]]
then
Expand All @@ -129,10 +135,15 @@ function evm_install() {
else
mkdir -p $DEFAULT_INSTALL_LOCATION
echo "Inflating $DEFAULT_TAR_LOCATION/$FILE_PREFIX$1$FILE_EXTENSION"
tar -xzf $DEFAULT_TAR_LOCATION/$FILE_PREFIX$1$FILE_EXTENSION -C $DEFAULT_TAR_LOCATION

# Handles the special case where otp_src_R15B03-1.tar.gz gets untarred into otp_src_R15B03
# tar xvzf ~/.evm/erlang_tars/otp_src_R15B03-1.tar.gz --strip-components 1 -C otp_src_R15B03-1
local UNTAR_DIR=$DEFAULT_TAR_LOCATION/$FILE_PREFIX$1
mkdir $UNTAR_DIR
tar -xzf $DEFAULT_TAR_LOCATION/$FILE_PREFIX$1$FILE_EXTENSION -C $UNTAR_DIR --strip-components 1

echo "Configuring..."
cd $DEFAULT_TAR_LOCATION/$FILE_PREFIX$1
cd $UNTAR_DIR
./configure --prefix $DEFAULT_INSTALL_LOCATION/$FILE_PREFIX$1

echo
Expand Down Expand Up @@ -199,9 +210,8 @@ function evm_uninstall() {
function evm_use() {
if [[ -d $DEFAULT_INSTALL_LOCATION$FILE_PREFIX$1 ]]
then
local evm_path=$HOME/.evm
PATH="$(printf "$PATH" \
| awk -v RS=: -v ORS=: "/${evm_path//\//\/}/ {next} {print}" \
| awk -v RS=: -v ORS=: "/${EVM_HOME//\//\/}/ {next} {print}" \
| sed -e 's#:$##')"

export PATH=$DEFAULT_INSTALL_LOCATION$FILE_PREFIX$1/bin:$PATH
Expand All @@ -215,11 +225,10 @@ function evm_use() {
function evm_default() {
if [[ -d $DEFAULT_INSTALL_LOCATION$FILE_PREFIX$1 ]]
then
local evm_path=$HOME/.evm
echo $1 > $evm_path/evm_config/erlang_default
echo $1 > $EVM_HOME/evm_config/erlang_default

PATH="$(printf "$PATH" \
| awk -v RS=: -v ORS=: "/${evm_path//\//\/}/ {next} {print}" \
| awk -v RS=: -v ORS=: "/${EVM_HOME//\//\/}/ {next} {print}" \
| sed -e 's#:$##')"
export PATH=$DEFAULT_INSTALL_LOCATION$FILE_PREFIX$1/bin:$PATH
else
Expand Down Expand Up @@ -253,10 +262,52 @@ function evm_cache() {
}

function evm_help() {
local HELP_MESSAGE="
This will be the help message!!!
"
echo $HELP_MESSAGE

local default_version=$(cat $EVM_HOME/evm_config/erlang_default)

local available_versions=$(ls -l ${DEFAULT_INSTALL_LOCATION} \
| grep '^d' \
| awk '{print $9}' \
| cut -d '_' -f 3 \
| sed 's/^R/\tR/g' \
| sort \
| perl -e 'print reverse <>')

local HELP_FILE=$EVM_HOME"/.evm_helptext"
cat > $HELP_FILE <<_EOF

EVM Home:
${EVM_HOME}
Default Version:
${default_version:-"None"}
Versions Ready To Use:
${available_versions:-" None"}

Usage:
* evm list
Lists available erlang versions which can be downloaded and installed on the system.
* evm cache
Lists available erlang versions which are in the evm space and not necessarily installed.
* evm download [version]
Downloads the erlang version.
* evm install [version]
Downloads and installs the specified erlang version.
* evm installed
Lists erlang versions which are built and are ready to be used.
* evm use [version]
Begins to use the specified erlang version.
* evm default [version]
Makes the specified erlang version as the default erlang version.
* evm remove [version]
Removes the erlang version completely from the evm space.
* evm uninstall [version]
Uninstalls erlang but keeps the erlang version within the evm.
* evm system
Alters the PATH within the shell to use the non-evm erlang.
_EOF

cat $HELP_FILE
rm $HELP_FILE
}

# This is supposed to be the main function of this file
Expand Down
13 changes: 11 additions & 2 deletions install
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Original file line number Diff line number Diff line change
Expand Up @@ -6,13 +6,22 @@
EVM_HOME="$HOME/.evm"
DIRS="erlang_tars erlang_versions evm_config scripts"

type lynx > /dev/null 2> /dev/null
if [[ $? -eq "1" ]]; then
echo "Could not complete installation of evm."
echo "Please install lynx."
exit 1
else
echo "Lynx found!"
fi

# For each dir, check whether it's already exists or not
for dir in $DIRS
do
if [[ ! -d "$EVM_HOME/$dir" ]]
then
mkdir -p "$EVM_HOME/$dir"
echo "$EVM_HOME/$dir successfull created"
echo "$EVM_HOME/$dir successfully created"
else
echo "$EVM_HOME/$dir already exists and will not be replaced"
fi
Expand All @@ -22,7 +31,7 @@ done
if [[ ! -f "$EVM_HOME/evm_config/erlang_default" ]]
then
touch "$EVM_HOME/evm_config/erlang_default"
echo "$EVM_HOME/evm_config/erlang_default succesfull created"
echo "$EVM_HOME/evm_config/erlang_default succesfully created"
else
echo "$EVM_HOME/evm_config/erlang_default already exists and will not be replaced"
fi
Expand Down