dmt: Implement API endpoint /api/job/{jobnum}

This returns all details related to the requested job number as well as a
tail of the job log file.  If `jobnum` is omited, details of the latest
job are returned.

Signed-off-by: Malfurious <m@lfurio.us>

2 files changed, 35 insertions, 1 deletions

diff --git a/dmt/config.sh b/dmt/config.sh
new file mode 100644
index 0000000..a19e14f
--- /dev/null
+++ b/dmt/config.sh
@@ -0,0 +1,2 @@
+# Number of lines of text to show per job on the main page
+CYCHE_LOG_TAIL_LENGTH=25
diff --git a/dmt/dmt b/dmt/dmt
index 9de6e37..7923580 100755
--- a/dmt/dmt
+++ b/dmt/dmt
@@ -7,11 +7,17 @@
 CYCHE_LOG_DIR="/data/logs"
 CYCHE_STATUS_FILE="/data/status"
 CYCHE_VERSION_FILE="/version"
+source config.sh
 
 integer() {
     [ "$1" -eq "$1" ] >/dev/null 2>&1
 }
 
+escape() {
+    sed 's/\\/\\\\/g; s/\r/\\r/g; s/\t/\\t/g; s/"/\\"/g' \
+        | awk '{printf "%s\\n", $0}'
+}
+
 newest_job() {
     ls -A "$CYCHE_LOG_DIR" | sort -rn | head -n1
 }
@@ -20,6 +26,10 @@ oldest_job() {
     ls -A "$CYCHE_LOG_DIR" | sort -n | head -n1
 }
 
+log_tail() {
+    tail -n "$CYCHE_LOG_TAIL_LENGTH" "$CYCHE_LOG_DIR/$1/log" | sed 's/\r//g'
+}
+
 api_status() {
     status=$(cat "$CYCHE_STATUS_FILE")
     [ "$status" == "" ] && active="false" || active="true"
@@ -33,4 +43,26 @@ api_status() {
     printf '"oldest":%i}' "$(oldest_job)"
 }
 
-api_status
+api_job() {
+    [ -z "$1" ] && job="$(newest_job)" || job="$1"
+    jobdir="$CYCHE_LOG_DIR/$job"
+
+    if [ -d "$jobdir" ]; then
+        status=$(cat "$CYCHE_STATUS_FILE")
+
+        result=$( ([ "$status" == "$job" ] && echo "active") \
+            || ([ -f "$jobdir/fail" ] && echo "fail") \
+            || echo "pass" )
+
+        printf 'Content-type: text/json\n\n{'
+        printf '"job":%i,' "$job"
+        printf '"hash":"%s",' "$(cat "$jobdir/hash")"
+        printf '"reason":"%s",' "$(cat "$jobdir/reason")"
+        printf '"service":"%s",' "$(cat "$jobdir/service")"
+        printf '"time":%i,' "$(cat "$jobdir/time")"
+        printf '"result":"%s",' "$result"
+        printf '"log":"%s"}' "$(log_tail "$job" | escape)"
+    fi
+}
+
+api_job