From 975587e9d2b5f1a85082ab7bf89e4c22dc0e9e62 Mon Sep 17 00:00:00 2001
From: Quentin Manfroi <quentin.manfroi@fr.clara.net>
Date: Tue, 17 Jul 2018 11:50:42 +0200
Subject: [PATCH] MON-259 improve readme generator

---
 scripts/01_update_output.sh | 17 +++-----
 scripts/02_update_readme.sh | 83 ++++++++++++++++++++++++-------------
 scripts/auto_update.sh      |  2 +-
 scripts/utils.sh            | 28 +++++++++++++
 4 files changed, 90 insertions(+), 40 deletions(-)
 create mode 100755 scripts/utils.sh

diff --git a/scripts/01_update_output.sh b/scripts/01_update_output.sh
index ff96107..ccef054 100755
--- a/scripts/01_update_output.sh
+++ b/scripts/01_update_output.sh
@@ -1,18 +1,13 @@
 #!/bin/bash
-set -xeo pipefail
+set -xueo pipefail
 
-script_dir=$(dirname $0)
-if [[ "$script_dir" == "." ]]; then
-  cd ..
-else
-  cd "$(dirname $script_dir)"
-fi
+source "$(dirname $0)/utils.sh"
+goto_root
 
-for file in $(find . -path ./incubator -prune -o -name 'monitors-*.tf' -print); do
-    cd $(dirname $file)
-    echo $file
+for path in $(find . -path ./incubator -prune -o -name 'monitors-*.tf' -print); do
+    cd $(dirname $path)
     > outputs.tf
-    for monitor in $(grep 'resource "datadog_monitor"' $(basename $file) | awk '{print $3}' | tr -d '"' ); do
+    for monitor in $(grep 'resource "datadog_monitor"' $(basename $path) | awk '{print $3}' | tr -d '"' ); do
         echo $monitor
         cat <<EOF >> outputs.tf
 output "${monitor}_id" {
diff --git a/scripts/02_update_readme.sh b/scripts/02_update_readme.sh
index fcd333b..a58c109 100755
--- a/scripts/02_update_readme.sh
+++ b/scripts/02_update_readme.sh
@@ -1,45 +1,72 @@
 #!/bin/bash
-set -xeo pipefail
+set -xueo pipefail
 
-script_dir=$(dirname $0)
-if [[ "$script_dir" == "." ]]; then
-  cd ..
-else
-  cd "$(dirname $script_dir)"
-fi
+source "$(dirname $0)/utils.sh"
+goto_root
 
 sed -i '/### Monitors summary ###/q' README.md
 echo >> README.md
-for dir in $(find -mindepth 1 \( -path ./incubator -o -path ./scripts -o -path ./testing  -o -path ./.git \) -prune -o -type d -print | sort); do
-    count=$(echo ${dir} | tr -cd '/' | wc -c)
-    for i in $(seq 1 $((${count}-1))); do
+for path in $(find -mindepth 1 \( -path './incubator' -o -path './scripts' -o -path './testing'  -o -path '*/\.*' \) -prune -o -type d -print | sort); do
+    directories=($(list_dirs $path))
+    for i in $(seq 1 $((${#directories[@]}-1))); do
         echo -en "\t" >> README.md
     done
-    echo -en "- [$(basename ${dir})](https://bitbucket.org/morea/terraform.feature.datadog/src/master/" >> README.md
-    for i in $(seq 2 $((${count}+1))); do
-        echo -en "$(echo ${dir} | cut -d'/' -f ${i})/" >> README.md
+    echo -en "- [$(basename ${path})](https://bitbucket.org/morea/terraform.feature.datadog/src/master/" >> README.md
+    for directory in "${directories[@]}"; do
+        echo -en "${directory}/" >> README.md
     done
     echo ")" >> README.md
 done
 
 PATTERN_DOC="Related documentation"
 
-for dir in $(find -mindepth 2 -name README.md); do
-    cd $(dirname $dir)
-    pwd
-    cp README.md README.md.bak
-    sed -i '/Inputs/,$d' README.md
-    terraform-docs md ./ | tail -n +2 >> README.md
-    sed -i 's/## Inputs/Inputs/g' README.md
-    sed -i '/Inputs/a ------' README.md
-    sed -i 's/## Outputs/Outputs/g' README.md
-    sed -i '/Outputs/a -------' README.md
-    if ! grep "${PATTERN_DOC}" README.md.bak; then
-        echo "Error: missing documentation section in README"
-        exit 1
+for path in $(find . -path ./incubator -prune -o -name 'monitors-*.tf' -print); do
+    cd $(dirname $path)
+    EXIST=0
+    if [ -f README.md ]; then
+        mv README.md README.md.bak
+        EXIST=1
+    fi
+    module=$(list_dirs $(dirname ${path}))
+    module_space=${module^^}
+    module_dash=${module//[ ]/-}
+    module_slash=${module//[ ]/\/}
+    cat <<EOF > README.md
+# ${module_space} DataDog monitors
+
+## How to use this module
+
+\`\`\`
+module "datadog-monitors-${module_dash}" {
+  source = "git::ssh://git@bitbucket.org/morea/terraform.feature.datadog.git//${module_slash}?ref={revision}"
+
+  environment = "\${var.environment}"
+  message = "\${module.datadog-message-alerting.alerting-message}"
+}
+
+\`\`\`
+
+## Purpose
+
+Creates DataDog monitors with the following checks :
+
+EOF
+    SAVEIFS=$IFS
+    IFS=$(echo -en "\n\b")
+    for match in $(grep name $(basename ${path})); do
+        echo "- $(get_name "${match}")" >> README.md
+    done
+    IFS=$SAVEIFS
+    terraform-docs md ./ >> README.md
+    if [[ $EXIST -eq 0 ]]; then
+        cat <<EOF >> README.md
+## ${PATTERN_DOC}
+
+EOF
+    else
+        grep -Pzo --color=never ".*${PATTERN_DOC}(.*\n)*" README.md.bak | head -n -1 >> README.md
+        rm README.md.bak
     fi
-    grep -Pzo --color=never ".*${PATTERN_DOC}(.*\n)*" README.md.bak | head -n -1 >> README.md
     dos2unix README.md
-    rm README.md.bak
     cd - >> /dev/null
 done
diff --git a/scripts/auto_update.sh b/scripts/auto_update.sh
index c22bb77..cb911e1 100755
--- a/scripts/auto_update.sh
+++ b/scripts/auto_update.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-set -xeo pipefail
+set -xueo pipefail
 
 cd $(dirname $0)
 for script in [0-9][0-9]_*.sh; do
diff --git a/scripts/utils.sh b/scripts/utils.sh
new file mode 100755
index 0000000..7ef9924
--- /dev/null
+++ b/scripts/utils.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+function goto_root {
+    script_dir=$(dirname $0)
+    if [[ "$script_dir" == "." ]]; then
+        cd ..
+    else
+        cd "$(dirname $script_dir)"
+    fi
+}
+
+function list_dirs {
+    echo ${1} | awk -F '/' '{$1=""; print $0}' | cut -c 2-
+}
+
+function get_name {
+    regex='^[[:space:]]+name[[:space:]]+=[[:space:]]+"\[.*\][[:space:]]+(.*)"$'
+    if [[ "${1}" =~ ${regex} ]]; then 
+        name="${BASH_REMATCH[1]}"
+    else
+        return 42
+    fi
+    if [[ "${name}" =~ ^(.*)[[:space:]]\{\{#is_alert\}\}.*$ ]]; then
+        echo "${BASH_REMATCH[1]}"
+    else
+        echo $name
+    fi
+}